------------[ cut here ]------------
WARNING: CPU: 3 PID: 7380 at mm/shmem.c:1265 shmem_evict_inode+0x89d/0xba0 mm/shmem.c:1265
Modules linked in:
CPU: 3 PID: 7380 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-12377-g9d1694dc91ce #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:shmem_evict_inode+0x89d/0xba0 mm/shmem.c:1265
Code: e6 e8 e7 e2 c5 ff 45 85 e4 75 aa e8 6d e7 c5 ff 48 8b 74 24 28 48 8b 7c 24 30 e8 1e a8 a2 ff e9 1a fe ff ff e8 54 e7 c5 ff 90 <0f> 0b 90 e9 a3 f9 ff ff e8 46 e7 c5 ff 4c 89 e2 48 b8 00 00 00 00
RSP: 0018:ffffc90006937b48 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff888026520810 RCX: ffffc9000c631000
RDX: 0000000000040000 RSI: ffffffff81c23a2c RDI: 0000000000000007
RBP: ffffc90006937c78 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000000 R12: 0000000000000008
R13: 0000000000000000 R14: ffff888026520840 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88802c900000(0063) knlGS:00000000f7ed0b40
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003104d000 CR3: 000000004c609000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
evict+0x2ed/0x6b0 fs/inode.c:665
iput_final fs/inode.c:1739 [inline]
iput.part.0+0x560/0x7b0 fs/inode.c:1765
iput+0x5c/0x80 fs/inode.c:1755
dentry_unlink_inode+0x292/0x430 fs/dcache.c:400
__dentry_kill+0x1ca/0x5f0 fs/dcache.c:603
dput.part.0+0x4ac/0x9a0 fs/dcache.c:845
dput+0x1f/0x30 fs/dcache.c:835
__fput+0x3b9/0xb70 fs/file_table.c:384
task_work_run+0x14d/0x240 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x281/0x2b0 kernel/entry/common.c:212
__do_fast_syscall_32+0x86/0x110 arch/x86/entry/common.c:324
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:346
entry_SYSENTER_compat_after_hwframe+0x70/0x7a
RIP: 0023:0xf7f17579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7ed05ac EFLAGS: 00000292 ORIG_RAX: 00000000000000c0
RAX: 0000000020000000 RBX: 0000000020000000 RCX: 0000000000b36000
RDX: 0000000000000002 RSI: 0000000000000011 RDI: 0000000000000009
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi