__fput+0x68e/0xa70 fs/file_table.c:473
 task_work_run+0x1d4/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6ad/0x22e0 kernel/exit.c:955
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104
 get_signal+0x1286/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 12294 Comm: syz.0.1814 Not tainted 6.15.0-syzkaller-11796-g5abc7438f1e9 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154
Code: 58 c9 ff 48 89 df 48 c7 c6 60 35 94 8b e8 c3 f2 10 00 90 0f 0b e8 bb 58 c9 ff 48 89 df 48 c7 c6 40 34 94 8b e8 ac f2 10 00 90 <0f> 0b e8 a4 58 c9 ff 48 89 df 48 c7 c6 60 35 94 8b e8 95 f2 10 00
RSP: 0018:ffffc9001c5070e0 EFLAGS: 00010046
RAX: 8bc13c3f51ff0700 RBX: ffffea00011b0000 RCX: 8bc13c3f51ff0700
RDX: 0000000000000005 RSI: ffffffff8db66a62 RDI: ffff888025028000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa44 R12: 0000000000000040
R13: 1ffffd4000236000 R14: 1ffffd4000236001 R15: ffffea00011b0008
FS:  0000000000000000(0000) GS:ffff888125c5c000(0063) knlGS:00000000f4846b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f4423da4 CR3: 0000000079588000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio+0xc3/0x500 mm/filemap.c:223
 filemap_remove_folio+0xe6/0x1f0 mm/filemap.c:253
 hugetlb_delete_from_page_cache fs/hugetlbfs/inode.c:334 [inline]
 remove_inode_single_folio fs/hugetlbfs/inode.c:539 [inline]
 remove_inode_hugepages+0x594/0x1100 fs/hugetlbfs/inode.c:596
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:719 [inline]
 hugetlbfs_fallocate+0xbc7/0x1100 fs/hugetlbfs/inode.c:745
 vfs_fallocate+0x6a3/0x830 fs/open.c:341
 madvise_remove mm/madvise.c:1041 [inline]
 madvise_vma_behavior mm/madvise.c:1272 [inline]
 madvise_walk_vmas mm/madvise.c:1539 [inline]
 madvise_do_behavior+0x169d/0x2e70 mm/madvise.c:1731
 do_madvise+0x174/0x220 mm/madvise.c:1824
 __do_sys_madvise mm/madvise.c:1833 [inline]
 __se_sys_madvise mm/madvise.c:1831 [inline]
 __ia32_sys_madvise+0xa7/0xc0 mm/madvise.c:1831
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xb6/0x2b0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x34/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70de539
Code: 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 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f484655c EFLAGS: 00000206 ORIG_RAX: 00000000000000db
RAX: ffffffffffffffda RBX: 0000000080000000 RCX: 0000000000600002
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x715/0x790 mm/filemap.c:154
Code: 58 c9 ff 48 89 df 48 c7 c6 60 35 94 8b e8 c3 f2 10 00 90 0f 0b e8 bb 58 c9 ff 48 89 df 48 c7 c6 40 34 94 8b e8 ac f2 10 00 90 <0f> 0b e8 a4 58 c9 ff 48 89 df 48 c7 c6 60 35 94 8b e8 95 f2 10 00
RSP: 0018:ffffc9001c5070e0 EFLAGS: 00010046
RAX: 8bc13c3f51ff0700 RBX: ffffea00011b0000 RCX: 8bc13c3f51ff0700
RDX: 0000000000000005 RSI: ffffffff8db66a62 RDI: ffff888025028000
RBP: 0000000000000001 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfaa44 R12: 0000000000000040
R13: 1ffffd4000236000 R14: 1ffffd4000236001 R15: ffffea00011b0008
FS:  0000000000000000(0000) GS:ffff888125c5c000(0063) knlGS:00000000f4846b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f4423da4 CR3: 0000000079588000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	03 74 b4 01          	add    0x1(%rsp,%rsi,4),%esi
   4:	10 07                	adc    %al,(%rdi)
   6:	03 74 b0 01          	add    0x1(%rax,%rsi,4),%esi
   a:	10 08                	adc    %cl,(%rax)
   c:	03 74 d8 01          	add    0x1(%rax,%rbx,8),%esi
  20:	00 51 52             	add    %dl,0x52(%rcx)
  23:	55                   	push   %rbp
  24:	89 e5                	mov    %esp,%ebp
  26:	0f 34                	sysenter
  28:	cd 80                	int    $0x80
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	5a                   	pop    %rdx
  2c:	59                   	pop    %rcx
  2d:	c3                   	ret
  2e:	90                   	nop
  2f:	90                   	nop
  30:	90                   	nop
  31:	90                   	nop
  32:	90                   	nop
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop