* Re: [PATCH net] ipv6/gro: fix an out of bounds memory bug in ipv6_gro_receive()
2022-10-27 11:39 ` Eric Dumazet
@ 2022-10-27 13:00 ` Ziyang Xuan (William)
2022-10-27 13:39 ` Eric Dumazet
0 siblings, 1 reply; 6+ messages in thread
From: Ziyang Xuan (William) @ 2022-10-27 13:00 UTC (permalink / raw)
To: Eric Dumazet
Cc: davem, yoshfuji, dsahern, kuba, pabeni, netdev, linux-kernel, herbert
[-- Attachment #1: Type: text/plain, Size: 2582 bytes --]
> On Thu, Oct 27, 2022 at 3:25 AM Ziyang Xuan
> <william.xuanziyang@huawei.com> wrote:
>>
>> IPv6 packets without NEXTHDR_NONE extension header can make continuous
>> __skb_pull() until pskb_may_pull() failed in ipv6_gso_pull_exthdrs().
>> That results in a big value of skb_gro_offset(), and after __skb_push()
>> in ipv6_gro_receive(), skb->data will less than skb->head, an out of
>> bounds memory bug occurs. That will trigger the problem as following:
>>
>> ==================================================================
>> BUG: KASAN: use-after-free in eth_type_trans+0x100/0x260
>> ...
>> Call trace:
>> dump_backtrace+0xd8/0x130
>> show_stack+0x1c/0x50
>> dump_stack_lvl+0x64/0x7c
>> print_address_description.constprop.0+0xbc/0x2e8
>> print_report+0x100/0x1e4
>> kasan_report+0x80/0x120
>> __asan_load8+0x78/0xa0
>> eth_type_trans+0x100/0x260
>
> Crash happens from eth_type_trans() , this should happen before
> ipv6_gro_receive() ?
>
> It seems your patch is unrelated.
>
> Please provide a repro.
C repro put in attachment.
>
>
>> napi_gro_frags+0x164/0x550
>> tun_get_user+0xda4/0x1270
>> tun_chr_write_iter+0x74/0x130
>> do_iter_readv_writev+0x130/0x1ec
>> do_iter_write+0xbc/0x1e0
>> vfs_writev+0x13c/0x26c
>>
>> Add comparison between skb->data - skb_gro_offset() and skb->head
>> and exception handler before __skb_push() to fix the bug.
>>
>> Fixes: 86911732d399 ("gro: Avoid copying headers of unmerged packets")
>> Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
>> ---
>> net/ipv6/ip6_offload.c | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
>> index 3ee345672849..6659ccf25387 100644
>> --- a/net/ipv6/ip6_offload.c
>> +++ b/net/ipv6/ip6_offload.c
>> @@ -237,6 +237,10 @@ INDIRECT_CALLABLE_SCOPE struct sk_buff *ipv6_gro_receive(struct list_head *head,
>> proto = ipv6_gso_pull_exthdrs(skb, proto);
>> skb_gro_pull(skb, -skb_transport_offset(skb));
>> skb_reset_transport_header(skb);
>> + if (unlikely(skb_headroom(skb) < skb_gro_offset(skb))) {
>
> This makes no sense to me.
>
> If there is a bug, it should be fixed earlier.
Maybe it is good to validate IPv6 packet earlier in ipv6_gro_receive() or more earlier?
>
>> + kfree_skb(skb);
>> + return ERR_PTR(-EINPROGRESS);
>> + }
>> __skb_push(skb, skb_gro_offset(skb));
>>
>> ops = rcu_dereference(inet6_offloads[proto]);
>> --
>> 2.25.1
>>
> .
>
[-- Attachment #2: eth_type_trans_uaf.c --]
[-- Type: text/plain, Size: 19213 bytes --]
// https://syzkaller.appspot.com/bug?id=7646a2204f385fb619275e834be62c2a4c422f13
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <sched.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>
#include <linux/capability.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/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>
#define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off))
#define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \
*(type*)(addr) = \
htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \
(((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len))))
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[1024];
};
static struct nlmsg nlmsg;
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;
memcpy(attr + 1, data, size);
nlmsg->pos += NLMSG_ALIGN(attr->nla_len);
}
static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type,
int* reply_len)
{
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;
unsigned n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0,
(struct sockaddr*)&addr, sizeof(addr));
if (n != hdr->nlmsg_len)
exit(1);
n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0);
if (hdr->nlmsg_type == NLMSG_DONE) {
*reply_len = 0;
return 0;
}
if (n < sizeof(struct nlmsghdr))
exit(1);
if (reply_len && hdr->nlmsg_type == reply_type) {
*reply_len = n;
return 0;
}
if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))
exit(1);
if (hdr->nlmsg_type != NLMSG_ERROR)
exit(1);
return -((struct nlmsgerr*)(hdr + 1))->error;
}
static int netlink_send(struct nlmsg* nlmsg, int sock)
{
return netlink_send_ext(nlmsg, sock, 0, NULL);
}
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_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);
(void)err;
}
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));
(void)err;
}
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));
(void)err;
}
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);
(void)err;
}
static int tunfd = -1;
static int tun_frags_enabled;
#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
#define IFF_NAPI_FRAGS 0x0020
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 = 240;
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 | IFF_NAPI | IFF_NAPI_FRAGS;
if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0)
exit(1);
}
if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0)
exit(1);
tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0;
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);
}
const int kInitNetNsFd = 239;
#define DEVLINK_FAMILY_NAME "devlink"
#define DEVLINK_CMD_PORT_GET 5
#define DEVLINK_CMD_RELOAD 37
#define DEVLINK_ATTR_BUS_NAME 1
#define DEVLINK_ATTR_DEV_NAME 2
#define DEVLINK_ATTR_NETDEV_NAME 7
#define DEVLINK_ATTR_NETNS_FD 138
static int netlink_devlink_id_get(struct nlmsg* nlmsg, int sock)
{
struct genlmsghdr genlhdr;
struct nlattr* attr;
int err, n;
uint16_t id = 0;
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, DEVLINK_FAMILY_NAME,
strlen(DEVLINK_FAMILY_NAME) + 1);
err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n);
if (err) {
return -1;
}
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) {
return -1;
}
recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); /* recv ack */
return id;
}
static void netlink_devlink_netns_move(const char* bus_name,
const char* dev_name, int netns_fd)
{
struct genlmsghdr genlhdr;
int sock;
int id, err;
sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
if (sock == -1)
exit(1);
id = netlink_devlink_id_get(&nlmsg, sock);
if (id == -1)
goto error;
memset(&genlhdr, 0, sizeof(genlhdr));
genlhdr.cmd = DEVLINK_CMD_RELOAD;
netlink_init(&nlmsg, id, 0, &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);
netlink_attr(&nlmsg, DEVLINK_ATTR_NETNS_FD, &netns_fd, sizeof(netns_fd));
err = netlink_send(&nlmsg, sock);
if (err) {
}
error:
close(sock);
}
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_devlink_id_get(&nlmsg, sock);
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);
if (err) {
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);
}
static void initialize_devlink_pci(void)
{
int netns = open("/proc/self/ns/net", O_RDONLY);
if (netns == -1)
exit(1);
int ret = setns(kInitNetNsFd, 0);
if (ret == -1)
exit(1);
netlink_devlink_netns_move("pci", "0000:00:10.0", netns);
ret = setns(netns, 0);
if (ret == -1)
exit(1);
close(netns);
initialize_devlink_ports("pci", "0000:00:10.0", "netpci");
}
#define MAX_FRAGS 4
struct vnet_fragmentation {
uint32_t full;
uint32_t count;
uint32_t frags[MAX_FRAGS];
};
static long syz_emit_ethernet(volatile long a0, volatile long a1,
volatile long a2)
{
if (tunfd < 0)
return (uintptr_t)-1;
uint32_t length = a0;
char* data = (char*)a1;
struct vnet_fragmentation* frags = (struct vnet_fragmentation*)a2;
struct iovec vecs[MAX_FRAGS + 1];
uint32_t nfrags = 0;
if (!tun_frags_enabled || frags == NULL) {
vecs[nfrags].iov_base = data;
vecs[nfrags].iov_len = length;
nfrags++;
} else {
bool full = true;
uint32_t i, count = 0;
full = frags->full;
count = frags->count;
if (count > MAX_FRAGS)
count = MAX_FRAGS;
for (i = 0; i < count && length != 0; i++) {
uint32_t size = 0;
size = frags->frags[i];
if (size > length)
size = length;
vecs[nfrags].iov_base = data;
vecs[nfrags].iov_len = size;
nfrags++;
data += size;
length -= size;
}
if (length != 0 && (full || nfrags == 0)) {
vecs[nfrags].iov_base = data;
vecs[nfrags].iov_len = length;
nfrags++;
}
}
return writev(tunfd, vecs, nfrags);
}
static void setup_common()
{
if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
}
}
static void loop();
static void sandbox_common()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
setsid();
int netns = open("/proc/self/ns/net", O_RDONLY);
if (netns == -1)
exit(1);
if (dup2(netns, kInitNetNsFd) < 0)
exit(1);
close(netns);
}
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)
{
sandbox_common();
initialize_tun();
sleep(5);
loop();
exit(1);
}
void loop(void)
{
*(uint32_t*)0x2001d000 = 1;
*(uint32_t*)0x2001d004 = 0x70;
*(uint8_t*)0x2001d008 = 0;
*(uint8_t*)0x2001d009 = 0;
*(uint8_t*)0x2001d00a = 0;
*(uint8_t*)0x2001d00b = 0;
*(uint32_t*)0x2001d00c = 0;
*(uint64_t*)0x2001d010 = 0xe;
*(uint64_t*)0x2001d018 = 0;
*(uint64_t*)0x2001d020 = 0;
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 0, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 1, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 2, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 3, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 4, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0x81, 5, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 6, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 7, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 8, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 9, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 10, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 11, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 12, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 13, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 14, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 3, 15, 2);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 17, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 18, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 19, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 20, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 21, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 22, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 23, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 24, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 25, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 26, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 27, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 28, 1);
STORE_BY_BITMASK(uint64_t, , 0x2001d028, 0, 29, 35);
*(uint32_t*)0x2001d030 = 0;
*(uint32_t*)0x2001d034 = 0;
*(uint64_t*)0x2001d038 = 0;
*(uint64_t*)0x2001d040 = 0xd429c0fd682991c2;
*(uint64_t*)0x2001d048 = 0x10010;
*(uint64_t*)0x2001d050 = 0;
*(uint32_t*)0x2001d058 = 0;
*(uint32_t*)0x2001d05c = 0;
*(uint64_t*)0x2001d060 = 0;
*(uint32_t*)0x2001d068 = 0;
*(uint16_t*)0x2001d06c = 0;
*(uint16_t*)0x2001d06e = 0;
// syscall(__NR_perf_event_open, 0x2001d000ul, 0, -1ul, -1, 0ul);
memcpy((void*)0x20000200,
"\xaa\xaa\xae\xaa\xaa\xaa\x00\x00\x00\x00\x00\x00\x86\xdd\x60\xb4\x09"
"\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\xff\xff"
"\xe0\x00\x00\x02\x3e\x02\x00\x00\x00\x00\x00\x00\x01\x83\x00\x90\x78"
"\x00\x09\x04\x00\x60\xb6\x80\xde\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\xff\xff\xac\x14\x08\xbb\x00\x00\x00\x00\x00\x00\x00"
"\x7c\x69\x58\xe0\xd0\x9d\xd0\x89\xa5\x3b\xf2\x09\x61\xee\x5f\xcf\xd5"
"\xb4\xcc\xb5\xdf\xbd\x8c\x7c\x57\xb7\x12\x15\xde\x6e\x84\xb0\xfb\x52"
"\x04\x4c\x5d\x87\x91\x51\xe5\x30\x12\xa0\x3f\x23\x97\x17\xb2\x41\x26"
"\x6b\x92\x79\x20\x0e\x80\xd1\x49\x83\x18\x7e\x9f\xc4\xf4\x20\x1e\x92"
"\x34\x07\x98\x9a\xd1\x35\xbd\x20\x67\xe5\x6a\xb9\xf4\x38\xb3\x39\x75"
"\xe4\xb8\x01\x77\x25\x6f\xf1\x25\x82\x20\xca\x36\xfe\xb6\x71\x41\x40"
"\xf4\x7f\x85\x7d\x7e\x6e\xee\xd8\x6f\x7b\x11\xc5\x12\x3b\xdb\x6f\x07"
"\x00\x4b\x3f\x04\x57\x96\x0e\xcc\x91\x3e\xdf\xef\xea\x0a\x39\x8b\x4d"
"\x0d\xde\xd0\x8e\x8e\x5e",
244);
syz_emit_ethernet(0x207843, 0x20000200, 0);
}
int main(void)
{
syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
do_sandbox_none();
return 0;
}
^ permalink raw reply [flat|nested] 6+ messages in thread