exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x9d5/0x2570 kernel/exit.c:881
 do_group_exit+0x229/0x2e0 kernel/exit.c:1024
 get_signal+0x1259/0x1340 kernel/signal.c:2872
 arch_do_signal_or_restart+0xc4/0x1310 arch/x86/kernel/signal.c:871
------------[ cut here ]------------
kernel BUG at mm/filemap.c:153!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7468 Comm: syz.4.820 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:filemap_unaccount_folio+0x559/0xa00 mm/filemap.c:153
Code: 07 38 c1 0f 8c 35 fe ff ff 4c 89 e7 e8 40 29 28 00 e9 28 fe ff ff e8 a6 01 d7 ff 48 89 df 48 c7 c6 e0 f9 94 8a e8 d7 1f 12 00 <0f> 0b e8 90 01 d7 ff 48 89 df 48 c7 c6 40 ff 94 8a e8 c1 1f 12 00
RSP: 0018:ffffc90003d87660 EFLAGS: 00010046
RAX: cfecb90b559a3400 RBX: ffffea000140b5c0 RCX: cfecb90b559a3400
RDX: 0000000000000002 RSI: ffffffff8a8c2920 RDI: ffffffff8adee1a0
RBP: ffffc90003d877b8 R08: ffffffff8e200f6f R09: 1ffffffff1c401ed
R10: dffffc0000000000 R11: fffffbfff1c401ee R12: ffff8880788ef508
R13: ffffc90003d87700 R14: dffffc0000000000 R15: ffff8880788ef508
FS:  00005555556e4500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3030fff8 CR3: 0000000027a77000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000001800
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc1/0x900 mm/filemap.c:222
 filemap_remove_folio+0xed/0x2c0 mm/filemap.c:255
 truncate_inode_folio+0x59/0x70 mm/truncate.c:195
 shmem_undo_range+0x554/0x21d0 mm/shmem.c:942
 shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x225/0x9f0 mm/shmem.c:1171
 evict+0x4b6/0x8b0 fs/inode.c:705
 __dentry_kill+0x412/0x630 fs/dcache.c:611
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xfa/0x1d0 fs/dcache.c:918
 __fput+0x597/0x8b0 fs/file_table.c:328
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f73e179ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe560a4278 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f73e1a17da0 RCX: 00007f73e179ce59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f73e1a17da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f73e1a17cb0 R11: 0000000000000246 R12: 00000000000652e6
R13: 00007f73e1a1609c R14: 000000000006520a R15: 00007ffe560a4380
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x559/0xa00 mm/filemap.c:153
Code: 07 38 c1 0f 8c 35 fe ff ff 4c 89 e7 e8 40 29 28 00 e9 28 fe ff ff e8 a6 01 d7 ff 48 89 df 48 c7 c6 e0 f9 94 8a e8 d7 1f 12 00 <0f> 0b e8 90 01 d7 ff 48 89 df 48 c7 c6 40 ff 94 8a e8 c1 1f 12 00
RSP: 0018:ffffc90003d87660 EFLAGS: 00010046
RAX: cfecb90b559a3400 RBX: ffffea000140b5c0 RCX: cfecb90b559a3400
RDX: 0000000000000002 RSI: ffffffff8a8c2920 RDI: ffffffff8adee1a0
RBP: ffffc90003d877b8 R08: ffffffff8e200f6f R09: 1ffffffff1c401ed
R10: dffffc0000000000 R11: fffffbfff1c401ee R12: ffff8880788ef508
R13: ffffc90003d87700 R14: dffffc0000000000 R15: ffff8880788ef508
FS:  00005555556e4500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3030fff8 CR3: 0000000027a77000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000001800
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400