folios_put_refs+0x53c/0x840 mm/swap.c:1002
 folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x5e5/0x1570 mm/shmem.c:1149
 shmem_truncate_range mm/shmem.c:1277 [inline]
 shmem_evict_inode+0x39e/0xbd0 mm/shmem.c:1407
 evict+0x3c2/0xad0 fs/inode.c:846
 iput_final fs/inode.c:1966 [inline]
 iput.part.0+0x605/0xf50 fs/inode.c:2015
 iput+0x35/0x40 fs/inode.c:1981
 dentry_unlink_inode+0x2a1/0x490 fs/dcache.c:467
 __dentry_kill+0x1d0/0x600 fs/dcache.c:670
 finish_dput+0x76/0x480 fs/dcache.c:879
 dput.part.0+0x456/0x570 fs/dcache.c:928
 dput+0x1f/0x30 fs/dcache.c:920
 __fput+0x519/0xb40 fs/file_table.c:477
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x829/0x2a30 kernel/exit.c:971
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112
------------[ cut here ]------------
kernel BUG at mm/filemap.c:155!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6101 Comm: syz.4.5306 Tainted: G     U    I  L      syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER, [I]=FIRMWARE_WORKAROUND, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:filemap_unaccount_folio+0x752/0xb80 mm/filemap.c:155
Code: 00 48 8b b5 a0 01 00 00 48 89 df e8 f8 11 03 00 e9 12 fd ff ff e8 ae d3 c6 ff 48 c7 c6 c0 2a bd 8b 48 89 df e8 3f 40 12 00 90 <0f> 0b e8 97 d3 c6 ff 48 c7 c6 60 22 bd 8b 48 89 df e8 28 40 12 00
RSP: 0018:ffffc900042bf208 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffea00021ac400 RCX: ffffc900042bf0ec
RDX: ffff88806ae8dac0 RSI: ffffffff8251df88 RDI: ffff88806ae8df44
RBP: ffffea00021ac430 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000002d598 R12: ffffea00021ac408
R13: ffff88805b0023f8 R14: 0000000000000001 R15: ffffea00021ac418
FS:  0000000000000000(0000) GS:ffff888124392000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000001000 CR3: 0000000063bc2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __filemap_remove_folio+0xae/0x660 mm/filemap.c:227
 filemap_remove_folio+0xfc/0x270 mm/filemap.c:257
 truncate_inode_folio+0x49/0x70 mm/truncate.c:176
 shmem_undo_range+0x3ae/0x1570 mm/shmem.c:1145
 shmem_truncate_range mm/shmem.c:1277 [inline]
 shmem_evict_inode+0x39e/0xbd0 mm/shmem.c:1407
 evict+0x3c2/0xad0 fs/inode.c:846
 iput_final fs/inode.c:1966 [inline]
 iput.part.0+0x605/0xf50 fs/inode.c:2015
 iput+0x35/0x40 fs/inode.c:1981
 dentry_unlink_inode+0x2a1/0x490 fs/dcache.c:467
 __dentry_kill+0x1d0/0x600 fs/dcache.c:670
 finish_dput+0x76/0x480 fs/dcache.c:879
 dput.part.0+0x456/0x570 fs/dcache.c:928
 dput+0x1f/0x30 fs/dcache.c:920
 __fput+0x519/0xb40 fs/file_table.c:477
 task_work_run+0x150/0x240 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x829/0x2a30 kernel/exit.c:971
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x91/0x770 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x668/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbed199bf79
Code: Unable to access opcode bytes at 0x7fbed199bf4f.
RSP: 002b:00007fbed28480e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbed1c16458 RCX: 00007fbed199bf79
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbed1c16458
RBP: 00007fbed1c16450 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbed1c164e8 R14: 00007ffd54c95350 R15: 00007ffd54c95438
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x752/0xb80 mm/filemap.c:155
Code: 00 48 8b b5 a0 01 00 00 48 89 df e8 f8 11 03 00 e9 12 fd ff ff e8 ae d3 c6 ff 48 c7 c6 c0 2a bd 8b 48 89 df e8 3f 40 12 00 90 <0f> 0b e8 97 d3 c6 ff 48 c7 c6 60 22 bd 8b 48 89 df e8 28 40 12 00
RSP: 0018:ffffc900042bf208 EFLAGS: 00010093
RAX: 0000000000000000 RBX: ffffea00021ac400 RCX: ffffc900042bf0ec
RDX: ffff88806ae8dac0 RSI: ffffffff8251df88 RDI: ffff88806ae8df44
RBP: ffffea00021ac430 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000002d598 R12: ffffea00021ac408
R13: ffff88805b0023f8 R14: 0000000000000001 R15: ffffea00021ac418
FS:  0000000000000000(0000) GS:ffff888124392000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000001000 CR3: 0000000063bc2000 CR4: 00000000003526f0