* [syzbot] [autofs?] memory leak in autofs_new_ino
@ 2026-09-02 16:33 syzbot
2026-09-03 5:57 ` Jeffin Philip
2026-09-03 6:10 ` Edward Adam Davis
0 siblings, 2 replies; 5+ messages in thread
From: syzbot @ 2026-09-02 16:33 UTC (permalink / raw)
To: autofs, linux-kernel, raven, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 8d3ae59288f1 Linux 7.2
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1784b6c6580000
kernel config: https://syzkaller.appspot.com/x/.config?x=11ad91fcc8fa7933
dashboard link: https://syzkaller.appspot.com/bug?extid=df1db6e034b3953e19f5
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11dc9a25580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1670b949580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/735a458674ac/disk-8d3ae592.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fbf50adb0745/vmlinux-8d3ae592.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6effa5f7f690/bzImage-8d3ae592.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+df1db6e034b3953e19f5@syzkaller.appspotmail.com
BUG: memory leak
unreferenced object 0xffff8881146ebc00 (size 192):
comm "syz.0.20", pid 5969, jiffies 4294943196
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 55e8e63e):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
__kmalloc_cache_noprof+0x356/0x440 mm/slub.c:5485
_kmalloc_noprof include/linux/slab.h:988 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
autofs_new_ino+0x24/0x80 fs/autofs/inode.c:16
autofs_fill_super+0x66/0x1d0 fs/autofs/inode.c:321
vfs_get_super fs/super.c:1273 [inline]
get_tree_nodev+0x91/0xf0 fs/super.c:1292
autofs_get_tree+0xbc/0x120 fs/autofs/inode.c:378
vfs_get_tree+0x30/0x120 fs/super.c:1700
vfs_cmd_create+0x7d/0x120 fs/fsopen.c:231
vfs_fsconfig_locked fs/fsopen.c:295 [inline]
__do_sys_fsconfig+0x492/0x9e0 fs/fsopen.c:463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 5+ messages in thread
* [syzbot] [autofs?] memory leak in autofs_new_ino
2026-09-02 16:33 [syzbot] [autofs?] memory leak in autofs_new_ino syzbot
@ 2026-09-03 5:57 ` Jeffin Philip
2026-09-03 8:16 ` syzbot
2026-09-03 6:10 ` Edward Adam Davis
1 sibling, 1 reply; 5+ messages in thread
From: Jeffin Philip @ 2026-09-03 5:57 UTC (permalink / raw)
To: syzbot+df1db6e034b3953e19f5; +Cc: autofs, linux-kernel, raven, syzkaller-bugs
#syz test: upstream 8d3ae59288f1
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index c1e210cec436..d93b5ec3cec7 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -324,6 +324,7 @@ static int autofs_fill_super(struct super_block *s, struct fs_context *fc)
root_inode = autofs_get_inode(s, S_IFDIR | 0755);
if (!root_inode)
+ autofs_free_ino(ino);
return -ENOMEM;
root_inode->i_uid = ctx->uid;
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [autofs?] memory leak in autofs_new_ino
2026-09-02 16:33 [syzbot] [autofs?] memory leak in autofs_new_ino syzbot
2026-09-03 5:57 ` Jeffin Philip
@ 2026-09-03 6:10 ` Edward Adam Davis
2026-09-03 8:34 ` syzbot
1 sibling, 1 reply; 5+ messages in thread
From: Edward Adam Davis @ 2026-09-03 6:10 UTC (permalink / raw)
To: syzbot+df1db6e034b3953e19f5; +Cc: linux-kernel, syzkaller-bugs
From: Edward Aadm Davis <eadavis@sina.com>
#syz test: upstream 8d3ae59288f1
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index c1e210cec436..6b15a3717ba7 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -323,8 +323,10 @@ static int autofs_fill_super(struct super_block *s, struct fs_context *fc)
return -ENOMEM;
root_inode = autofs_get_inode(s, S_IFDIR | 0755);
- if (!root_inode)
+ if (!root_inode) {
+ autofs_free_ino(ino);
return -ENOMEM;
+ }
root_inode->i_uid = ctx->uid;
root_inode->i_gid = ctx->gid;
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [autofs?] memory leak in autofs_new_ino
2026-09-03 5:57 ` Jeffin Philip
@ 2026-09-03 8:16 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2026-09-03 8:16 UTC (permalink / raw)
To: autofs, jeffinphilip14, linux-kernel, raven, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in create_pipe_files
BUG: memory leak
unreferenced object 0xffff88810ceec180 (size 176):
comm "syz.0.17", pid 6581, jiffies 4294948258
hex dump (first 32 bytes):
00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`.......
d8 a5 46 0d 81 88 ff ff c0 36 91 00 81 88 ff ff ..F......6......
backtrace (crc ec35cd54):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
alloc_empty_file+0x57/0x180 fs/file_table.c:262
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810d8431c0 (size 56):
comm "syz.0.17", pid 6581, jiffies 4294948258
hex dump (first 32 bytes):
ff ff 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 2672a0c6):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
lsm_file_alloc security/security.c:171 [inline]
security_file_alloc+0x30/0x250 security/security.c:2406
init_file+0x3e/0x160 fs/file_table.c:184
alloc_empty_file+0x75/0x180 fs/file_table.c:266
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888102f619c0 (size 184):
comm "syz-executor", pid 6483, jiffies 4294948379
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 4a068722):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
prepare_creds+0x22/0x570 kernel/cred.c:185
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x988/0x2d70 kernel/fork.c:2153
kernel_clone+0x101/0x710 kernel/fork.c:2748
__do_sys_clone+0x7f/0xb0 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888102e91600 (size 32):
comm "syz-executor", pid 6483, jiffies 4294948379
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f8 52 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00 .R..............
backtrace (crc 9ae86290):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
__do_kmalloc_node mm/slub.c:5333 [inline]
__kmalloc_noprof+0x3bf/0x550 mm/slub.c:5359
_kmalloc_noprof include/linux/slab.h:992 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
lsm_blob_alloc+0x4d/0x80 security/security.c:218
lsm_cred_alloc security/security.c:235 [inline]
security_prepare_creds+0x2d/0x290 security/security.c:2866
prepare_creds+0x317/0x570 kernel/cred.c:215
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x988/0x2d70 kernel/fork.c:2153
kernel_clone+0x101/0x710 kernel/fork.c:2748
__do_sys_clone+0x7f/0xb0 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810d015000 (size 176):
comm "syz.0.19", pid 6612, jiffies 4294948379
hex dump (first 32 bytes):
00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`.......
80 8c 9c 11 81 88 ff ff c0 3c 91 00 81 88 ff ff .........<......
backtrace (crc 95068e96):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
alloc_empty_file+0x57/0x180 fs/file_table.c:262
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888127a600e0 (size 56):
comm "syz.0.19", pid 6612, jiffies 4294948379
hex dump (first 32 bytes):
ff ff 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 2672a0c6):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
lsm_file_alloc security/security.c:171 [inline]
security_file_alloc+0x30/0x250 security/security.c:2406
init_file+0x3e/0x160 fs/file_table.c:184
alloc_empty_file+0x75/0x180 fs/file_table.c:266
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: 8d3ae592 Linux 7.2
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=173850f9580000
kernel config: https://syzkaller.appspot.com/x/.config?x=11ad91fcc8fa7933
dashboard link: https://syzkaller.appspot.com/bug?extid=df1db6e034b3953e19f5
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
patch: https://syzkaller.appspot.com/x/patch.diff?x=17eb8b49580000
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [autofs?] memory leak in autofs_new_ino
2026-09-03 6:10 ` Edward Adam Davis
@ 2026-09-03 8:34 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2026-09-03 8:34 UTC (permalink / raw)
To: eadavis, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in prepare_creds
BUG: memory leak
unreferenced object 0xffff888109c2f180 (size 184):
comm "syz-executor", pid 6487, jiffies 4294948020
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 1a243f47):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
prepare_creds+0x22/0x570 kernel/cred.c:185
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x988/0x2d70 kernel/fork.c:2153
kernel_clone+0x101/0x710 kernel/fork.c:2748
__do_sys_clone+0x7f/0xb0 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff8881019c8600 (size 176):
comm "syz.0.18", pid 6603, jiffies 4294948020
hex dump (first 32 bytes):
00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`.......
d0 b9 e9 0c 81 88 ff ff 00 e3 06 01 81 88 ff ff ................
backtrace (crc d2f375e0):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
alloc_empty_file+0x57/0x180 fs/file_table.c:262
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810d168f18 (size 56):
comm "syz.0.18", pid 6603, jiffies 4294948020
hex dump (first 32 bytes):
ff ff 01 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 2672a0c6):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
lsm_file_alloc security/security.c:171 [inline]
security_file_alloc+0x30/0x250 security/security.c:2406
init_file+0x3e/0x160 fs/file_table.c:184
alloc_empty_file+0x75/0x180 fs/file_table.c:266
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff888102dc7300 (size 184):
comm "syz-executor", pid 6487, jiffies 4294948082
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 7611ee4d):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
prepare_creds+0x22/0x570 kernel/cred.c:185
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x988/0x2d70 kernel/fork.c:2153
kernel_clone+0x101/0x710 kernel/fork.c:2748
__do_sys_clone+0x7f/0xb0 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff8881027737e0 (size 32):
comm "syz-executor", pid 6487, jiffies 4294948082
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f8 52 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00 .R..............
backtrace (crc 9ae86290):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
__do_kmalloc_node mm/slub.c:5333 [inline]
__kmalloc_noprof+0x3bf/0x550 mm/slub.c:5359
_kmalloc_noprof include/linux/slab.h:992 [inline]
_kzalloc_noprof include/linux/slab.h:1309 [inline]
lsm_blob_alloc+0x4d/0x80 security/security.c:218
lsm_cred_alloc security/security.c:235 [inline]
security_prepare_creds+0x2d/0x290 security/security.c:2866
prepare_creds+0x317/0x570 kernel/cred.c:215
copy_creds+0x44/0x290 kernel/cred.c:286
copy_process+0x988/0x2d70 kernel/fork.c:2153
kernel_clone+0x101/0x710 kernel/fork.c:2748
__do_sys_clone+0x7f/0xb0 kernel/fork.c:2889
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
BUG: memory leak
unreferenced object 0xffff88810d41acc0 (size 176):
comm "syz.0.19", pid 6624, jiffies 4294948082
hex dump (first 32 bytes):
00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`.......
28 f3 f5 0c 81 88 ff ff c0 26 2b 16 81 88 ff ff (........&+.....
backtrace (crc fec2fe67):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4597 [inline]
slab_alloc_node mm/slub.c:4917 [inline]
kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931
alloc_empty_file+0x57/0x180 fs/file_table.c:262
alloc_file fs/file_table.c:396 [inline]
alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427
create_pipe_files+0x106/0x2f0 fs/pipe.c:1042
__do_pipe_flags fs/pipe.c:1088 [inline]
do_pipe2+0x6c/0x160 fs/pipe.c:1136
__do_sys_pipe fs/pipe.c:1159 [inline]
__se_sys_pipe fs/pipe.c:1157 [inline]
__x64_sys_pipe+0x18/0x20 fs/pipe.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF
Tested on:
commit: 8d3ae592 Linux 7.2
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=17fb1f79580000
kernel config: https://syzkaller.appspot.com/x/.config?x=11ad91fcc8fa7933
dashboard link: https://syzkaller.appspot.com/bug?extid=df1db6e034b3953e19f5
compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44
patch: https://syzkaller.appspot.com/x/patch.diff?x=17a870f9580000
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2026-09-03 8:34 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2026-09-02 16:33 [syzbot] [autofs?] memory leak in autofs_new_ino syzbot
2026-09-03 5:57 ` Jeffin Philip
2026-09-03 8:16 ` syzbot
2026-09-03 6:10 ` Edward Adam Davis
2026-09-03 8:34 ` syzbot
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