do_group_exit+0x207/0x2c0 kernel/exit.c:1101
 get_signal+0x16b2/0x1750 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: 1 UID: 0 PID: 6085 Comm: syz.0.43 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:ffffc9000afcf070 EFLAGS: 00010046
RAX: 9f77a04feb6c2200 RBX: ffffea00016711c0 RCX: ffffc9000afcec03
RDX: 0000000000000002 RSI: ffffffff8c0ab280 RDI: ffffffff8c60da20
RBP: 0000000000000000 R08: ffffffff901bcf77 R09: 1ffffffff20379ee
R10: dffffc0000000000 R11: fffffbfff20379ef R12: dffffc0000000000
R13: 1ffffd40002ce239 R14: ffff88807968d888 R15: ffffea00016711c8
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400001000000 CR3: 000000000e738000 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+0x44b/0x1820 mm/shmem.c:1108
 shmem_truncate_range mm/shmem.c:1224 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1352
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x20d/0x630 fs/dcache.c:660
 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/0x2860 kernel/exit.c:952
 do_group_exit+0x207/0x2c0 kernel/exit.c:1101
 get_signal+0x16b2/0x1750 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
RIP: 0033:0x7ff07858cde9
Code: Unable to access opcode bytes at 0x7ff07858cdbf.
RSP: 002b:00007ff079332038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 000000000003fffd RBX: 00007ff0787a6080 RCX: 00007ff07858cde9
RDX: 03fffffffffffeda RSI: 00004000000000c0 RDI: 0000000000000003
RBP: 00007ff07860e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff0787a6080 R15: 00007fff32373b48
 </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:ffffc9000afcf070 EFLAGS: 00010046
RAX: 9f77a04feb6c2200 RBX: ffffea00016711c0 RCX: ffffc9000afcec03
RDX: 0000000000000002 RSI: ffffffff8c0ab280 RDI: ffffffff8c60da20
RBP: 0000000000000000 R08: ffffffff901bcf77 R09: 1ffffffff20379ee
R10: dffffc0000000000 R11: fffffbfff20379ef R12: dffffc0000000000
R13: 1ffffd40002ce239 R14: ffff88807968d888 R15: ffffea00016711c8
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000400001000000 CR3: 000000000e738000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400