exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x86c/0x2bd0 kernel/exit.c:964
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
------------[ cut here ]------------
kernel BUG at mm/filemap.c:154!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 3 UID: 0 PID: 19271 Comm: syz.3.3591 Not tainted 6.16.0-rc7-syzkaller-00034-g25fae0b93d1d #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:filemap_unaccount_folio+0xef/0x8c0 mm/filemap.c:154
Code: 37 f4 ca ff 89 ee 31 ff 4c 8d 6b 30 e8 6a ef ca ff 85 ed 7e 17 e8 21 f4 ca ff 48 c7 c6 00 f9 b8 8b 48 89 df e8 62 ba 11 00 90 <0f> 0b e8 0a f4 ca ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900034af390 EFLAGS: 00010083
RAX: 00000000000297b6 RBX: ffffea00016c0000 RCX: ffffc900278f1000
RDX: 0000000000080000 RSI: ffffffff81f060be RDI: ffff88806d7e0444
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88806e0a9150
R13: ffffea00016c0030 R14: 0000000000001440 R15: ffffea00016c0000
FS:  0000000000000000(0000) GS:ffff88809782d000(0063) knlGS:00000000f4886b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5054da4 CR3: 0000000061b98000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 __filemap_remove_folio mm/filemap.c:223 [inline]
 filemap_remove_folio+0xf1/0x250 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+0x74a/0xed0 fs/hugetlbfs/inode.c:596
 hugetlbfs_punch_hole fs/hugetlbfs/inode.c:719 [inline]
 hugetlbfs_fallocate+0xf3f/0x12e0 fs/hugetlbfs/inode.c:745
 vfs_fallocate+0x608/0x10c0 fs/open.c:341
 madvise_remove mm/madvise.c:1043 [inline]
 madvise_vma_behavior+0x21ca/0x2420 mm/madvise.c:1274
 madvise_walk_vmas+0x1ce/0x2c0 mm/madvise.c:1541
 madvise_do_behavior+0x15d/0x3f0 mm/madvise.c:1733
 do_madvise+0x161/0x230 mm/madvise.c:1826
 __do_sys_madvise mm/madvise.c:1835 [inline]
 __se_sys_madvise mm/madvise.c:1833 [inline]
 __ia32_sys_madvise+0xa7/0x110 mm/madvise.c:1833
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf711e579
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:00000000f488655c EFLAGS: 00000296 ORIG_RAX: 00000000000000db
RAX: ffffffffffffffda RBX: 0000000080000000 RCX: 0000000000600002
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0xef/0x8c0 mm/filemap.c:154
Code: 37 f4 ca ff 89 ee 31 ff 4c 8d 6b 30 e8 6a ef ca ff 85 ed 7e 17 e8 21 f4 ca ff 48 c7 c6 00 f9 b8 8b 48 89 df e8 62 ba 11 00 90 <0f> 0b e8 0a f4 ca ff 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1
RSP: 0018:ffffc900034af390 EFLAGS: 00010083
RAX: 00000000000297b6 RBX: ffffea00016c0000 RCX: ffffc900278f1000
RDX: 0000000000080000 RSI: ffffffff81f060be RDI: ffff88806d7e0444
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88806e0a9150
R13: ffffea00016c0030 R14: 0000000000001440 R15: ffffea00016c0000
FS:  0000000000000000(0000) GS:ffff88809782d000(0063) knlGS:00000000f4886b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5054da4 CR3: 0000000061b98000 CR4: 0000000000352ef0
----------------
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