shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1132
 shrink_dcache_parent+0xcb/0x3b0
 do_one_tree+0x23/0xe0 fs/dcache.c:1595
 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1612
 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620
 kill_anon_super fs/super.c:1237 [inline]
 kill_litter_super+0x76/0xb0 fs/super.c:1247
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1424
 task_work_run+0x24f/0x310 kernel/task_work.c:227
------------[ cut here ]------------
kernel BUG at mm/filemap.c:155!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 UID: 0 PID: 15643 Comm: syz.8.2021 Not tainted 6.14.0-rc2-next-20250210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:filemap_unaccount_folio+0x73d/0x7d0 mm/filemap.c:155
Code: de c7 ff 48 89 df 48 c7 c6 40 d3 13 8c e8 0b 04 12 00 90 0f 0b e8 b3 de c7 ff 48 89 df 48 c7 c6 20 d2 13 8c e8 f4 03 12 00 90 <0f> 0b e8 9c de c7 ff 48 89 df 48 c7 c6 40 d3 13 8c e8 dd 03 12 00
RSP: 0018:ffffc90000a0f010 EFLAGS: 00010046
RAX: 8e70d0c9ae68f600 RBX: ffffea0000ea8000 RCX: ffffc90000a0ec03
RDX: 0000000000000004 RSI: ffffffff8c0ab280 RDI: ffffffff8c60da20
RBP: 0000000000000000 R08: ffffffff901bcf77 R09: 1ffffffff20379ee
R10: dffffc0000000000 R11: fffffbfff20379ef R12: dffffc0000000000
R13: 1ffffd40001d5001 R14: ffff88802fc32ad0 R15: ffffea0000ea8008
FS:  00007f74257586c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30815ff8 CR3: 00000000653d8000 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:257
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:176
 shmem_undo_range+0x1035/0x1820 mm/shmem.c:1196
 shmem_truncate_range mm/shmem.c:1224 [inline]
 shmem_fallocate+0x431/0xf20 mm/shmem.c:3674
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 madvise_remove mm/madvise.c:1034 [inline]
 madvise_vma_behavior mm/madvise.c:1269 [inline]
 madvise_walk_vmas mm/madvise.c:1511 [inline]
 madvise_do_behavior+0x1f29/0x3c00 mm/madvise.c:1646
 do_madvise mm/madvise.c:1744 [inline]
 __do_sys_madvise mm/madvise.c:1752 [inline]
 __se_sys_madvise mm/madvise.c:1750 [inline]
 __x64_sys_madvise+0x11b/0x140 mm/madvise.c:1750
 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: 0033:0x7f742498cde9
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:00007f7425758038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f7424ba5fa0 RCX: 00007f742498cde9
RDX: 0000000000000009 RSI: 0000000000600000 RDI: 0000400000000000
RBP: 00007f7424a0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7424ba5fa0 R15: 00007ffe73c8b808
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x73d/0x7d0 mm/filemap.c:155
Code: de c7 ff 48 89 df 48 c7 c6 40 d3 13 8c e8 0b 04 12 00 90 0f 0b e8 b3 de c7 ff 48 89 df 48 c7 c6 20 d2 13 8c e8 f4 03 12 00 90 <0f> 0b e8 9c de c7 ff 48 89 df 48 c7 c6 40 d3 13 8c e8 dd 03 12 00
RSP: 0018:ffffc90000a0f010 EFLAGS: 00010046
RAX: 8e70d0c9ae68f600 RBX: ffffea0000ea8000 RCX: ffffc90000a0ec03
RDX: 0000000000000004 RSI: ffffffff8c0ab280 RDI: ffffffff8c60da20
RBP: 0000000000000000 R08: ffffffff901bcf77 R09: 1ffffffff20379ee
R10: dffffc0000000000 R11: fffffbfff20379ef R12: dffffc0000000000
R13: 1ffffd40001d5001 R14: ffff88802fc32ad0 R15: ffffea0000ea8008
FS:  00007f74257586c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30815ff8 CR3: 00000000653d8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400