__dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5ee/0x930 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
------------[ cut here ]------------
kernel BUG at mm/filemap.c:166!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4986 Comm: syz.3.128 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 e9 70 db ff 4c 89 f7 48 c7 c6 e0 e4 12 8a e8 aa db 0d 00 0f 0b e8 d3 70 db ff 4c 89 f7 48 c7 c6 20 e5 12 8a e8 94 db 0d 00 <0f> 0b 48 85 ed 75 59 e8 b8 70 db ff eb 5d e8 b1 70 db ff 4c 89 f7
RSP: 0018:ffffc90003aaf5a8 EFLAGS: 00010046
RAX: 4a6f5b7b5e496600 RBX: 0000000000000000 RCX: ffff88802b648000
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002981b9 R08: dffffc0000000000 R09: ffffed1017204f24
R10: ffffed1017204f24 R11: 1ffff11017204f23 R12: ffffea00014c0dc0
R13: dffffc0000000000 R14: ffffea00014c0dc0 R15: ffffea00014c0dc8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47ebc1b6c0 CR3: 000000005efb8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __delete_from_page_cache+0xbf/0x6b0 mm/filemap.c:231
 delete_from_page_cache+0x121/0x190 mm/filemap.c:266
 truncate_inode_page+0x8d/0xb0 mm/truncate.c:219
 shmem_undo_range+0x49b/0x1840 mm/shmem.c:960
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x20d/0xa00 mm/shmem.c:1145
 evict+0x485/0x870 fs/inode.c:647
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5ee/0x930 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x61e/0x20a0 kernel/exit.c:883
 __do_sys_exit kernel/exit.c:966 [inline]
 __se_sys_exit kernel/exit.c:964 [inline]
 __x64_sys_exit+0x3c/0x40 kernel/exit.c:964
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4733322be9
Code: Unable to access opcode bytes at RIP 0x7f4733322bbf.
RSP: 002b:00007f4731589f08 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 0000000000000058 RCX: 00007f4733322be9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f47333a5e19 R08: 0000000000000058 R09: 0000000000000058
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f473354a038 R14: 00007f4733549fa0 R15: 00007ffdc22acd78
 </TASK>
Modules linked in:
---[ end trace 745e48651dbd9baa ]---
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 e9 70 db ff 4c 89 f7 48 c7 c6 e0 e4 12 8a e8 aa db 0d 00 0f 0b e8 d3 70 db ff 4c 89 f7 48 c7 c6 20 e5 12 8a e8 94 db 0d 00 <0f> 0b 48 85 ed 75 59 e8 b8 70 db ff eb 5d e8 b1 70 db ff 4c 89 f7
RSP: 0018:ffffc90003aaf5a8 EFLAGS: 00010046
RAX: 4a6f5b7b5e496600 RBX: 0000000000000000 RCX: ffff88802b648000
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002981b9 R08: dffffc0000000000 R09: ffffed1017204f24
R10: ffffed1017204f24 R11: 1ffff11017204f23 R12: ffffea00014c0dc0
R13: dffffc0000000000 R14: ffffea00014c0dc0 R15: ffffea00014c0dc8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47ebc1b6c0 CR3: 000000005efb8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400