dput+0x19f/0x2b0 fs/dcache.c:902
 __fput+0x60b/0x9f0 fs/file_table.c:472
 task_work_run+0x24f/0x310 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0xa2a/0x28e0 kernel/exit.c:952
 do_group_exit+0x207/0x2c0 kernel/exit.c:1101
 get_signal+0x168c/0x1720 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/filemap.c:155!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 22689 Comm: syz.3.2848 Not tainted 6.14.0-rc3-next-20250218-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:filemap_unaccount_folio+0x73d/0x7d0 mm/filemap.c:155
Code: b4 c7 ff 48 89 df 48 c7 c6 e0 ed 33 8c e8 3b 74 12 00 90 0f 0b e8 43 b4 c7 ff 48 89 df 48 c7 c6 c0 ec 33 8c e8 24 74 12 00 90 <0f> 0b e8 2c b4 c7 ff 48 89 df 48 c7 c6 e0 ed 33 8c e8 0d 74 12 00
RSP: 0018:ffffc90002e37010 EFLAGS: 00010046
RAX: dd9111b40ec2b400 RBX: ffffea0001448000 RCX: ffffc90002e36c03
RDX: 0000000000000004 RSI: ffffffff8c2aaf60 RDI: ffffffff8c8156e0
RBP: 0000000000000000 R08: ffffffff903da477 R09: 1ffffffff207b48e
R10: dffffc0000000000 R11: fffffbfff207b48f R12: dffffc0000000000
R13: 1ffffd4000289001 R14: ffff88805b6d5888 R15: ffffea0001448008
FS:  00007fa6b7fe46c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a8fcd56c0 CR3: 000000007e41e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc7/0x670 mm/filemap.c:224
 filemap_remove_folio+0xe1/0x1f0 mm/filemap.c:254
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:162
 shmem_undo_range+0x1035/0x1820 mm/shmem.c:1209
 shmem_truncate_range mm/shmem.c:1237 [inline]
 shmem_fallocate+0x431/0xf20 mm/shmem.c:3663
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 madvise_remove mm/madvise.c:1034 [inline]
 madvise_vma_behavior mm/madvise.c:1263 [inline]
 madvise_walk_vmas mm/madvise.c:1505 [inline]
 madvise_do_behavior+0x1ec6/0x3b90 mm/madvise.c:1657
 do_madvise mm/madvise.c:1755 [inline]
 __do_sys_madvise mm/madvise.c:1763 [inline]
 __se_sys_madvise mm/madvise.c:1761 [inline]
 __x64_sys_madvise+0x11b/0x140 mm/madvise.c:1761
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa6b718d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa6b7fe4038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007fa6b73a6080 RCX: 00007fa6b718d169
RDX: 0000000000000009 RSI: 000000000060000b RDI: 0000400000000000
RBP: 00007fa6b720e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa6b73a6080 R15: 00007ffe8c15f3c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x73d/0x7d0 mm/filemap.c:155
Code: b4 c7 ff 48 89 df 48 c7 c6 e0 ed 33 8c e8 3b 74 12 00 90 0f 0b e8 43 b4 c7 ff 48 89 df 48 c7 c6 c0 ec 33 8c e8 24 74 12 00 90 <0f> 0b e8 2c b4 c7 ff 48 89 df 48 c7 c6 e0 ed 33 8c e8 0d 74 12 00
RSP: 0018:ffffc90002e37010 EFLAGS: 00010046
RAX: dd9111b40ec2b400 RBX: ffffea0001448000 RCX: ffffc90002e36c03
RDX: 0000000000000004 RSI: ffffffff8c2aaf60 RDI: ffffffff8c8156e0
RBP: 0000000000000000 R08: ffffffff903da477 R09: 1ffffffff207b48e
R10: dffffc0000000000 R11: fffffbfff207b48f R12: dffffc0000000000
R13: 1ffffd4000289001 R14: ffff88805b6d5888 R15: ffffea0001448008
FS:  00007fa6b7fe46c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a8fcd56c0 CR3: 000000007e41e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400