shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
 evict+0x4c9/0x8d0 fs/inode.c:705
 __dentry_kill+0x431/0x650 fs/dcache.c:611
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xfa/0x1d0 fs/dcache.c:918
 __fput+0x5e0/0x920 fs/file_table.c:328
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 get_signal+0x11a6/0x1350 kernel/signal.c:2648
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
------------[ cut here ]------------
kernel BUG at mm/filemap.c:153!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4602 Comm: syz.1.42 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:filemap_unaccount_folio+0x5cf/0xa80 mm/filemap.c:153
Code: 07 38 c1 0f 8c 19 fe ff ff 4c 89 e7 e8 ca f9 27 00 e9 0c fe ff ff e8 b0 ed d6 ff 48 89 df 48 c7 c6 20 f7 94 8a e8 11 0d 12 00 <0f> 0b e8 9a ed d6 ff 48 89 df 48 c7 c6 80 fc 94 8a e8 fb 0c 12 00
RSP: 0018:ffffc9000556f2f8 EFLAGS: 00010046
RAX: 58e3b1e4cb407900 RBX: ffffea0001c61b80 RCX: 58e3b1e4cb407900
RDX: 0000000000000002 RSI: ffffffff8a8c22a0 RDI: ffffffff8adf13a0
RBP: ffffc9000556f458 R08: ffffffff8e1ff42f R09: 1ffffffff1c3fe85
R10: dffffc0000000000 R11: fffffbfff1c3fe86 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88807b795578 R15: 1ffff92000aade70
FS:  00007f1e201e76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15cd985f40 CR3: 0000000017786000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio+0xbc/0x8a0 mm/filemap.c:222
 filemap_remove_folio+0xed/0x2c0 mm/filemap.c:255
 truncate_inode_folio+0x59/0x70 mm/truncate.c:195
 shmem_undo_range+0x533/0x20c0 mm/shmem.c:942
 shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x25b/0xa80 mm/shmem.c:1171
 evict+0x4c9/0x8d0 fs/inode.c:705
 __dentry_kill+0x431/0x650 fs/dcache.c:611
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xfa/0x1d0 fs/dcache.c:918
 __fput+0x5e0/0x920 fs/file_table.c:328
 task_work_run+0x1d0/0x260 kernel/task_work.c:203
 get_signal+0x11a6/0x1350 kernel/signal.c:2648
 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1e1f39cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1e201e6fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff2 RBX: 00007f1e1f615fa0 RCX: 00007f1e1f39cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040001000
RBP: 00007f1e1f432d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1e1f616038 R14: 00007f1e1f615fa0 R15: 00007fff7dcdfe18
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_unaccount_folio+0x5cf/0xa80 mm/filemap.c:153
Code: 07 38 c1 0f 8c 19 fe ff ff 4c 89 e7 e8 ca f9 27 00 e9 0c fe ff ff e8 b0 ed d6 ff 48 89 df 48 c7 c6 20 f7 94 8a e8 11 0d 12 00 <0f> 0b e8 9a ed d6 ff 48 89 df 48 c7 c6 80 fc 94 8a e8 fb 0c 12 00
RSP: 0018:ffffc9000556f2f8 EFLAGS: 00010046
RAX: 58e3b1e4cb407900 RBX: ffffea0001c61b80 RCX: 58e3b1e4cb407900
RDX: 0000000000000002 RSI: ffffffff8a8c22a0 RDI: ffffffff8adf13a0
RBP: ffffc9000556f458 R08: ffffffff8e1ff42f R09: 1ffffffff1c3fe85
R10: dffffc0000000000 R11: fffffbfff1c3fe86 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88807b795578 R15: 1ffff92000aade70
FS:  00007f1e201e76c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15cd985f40 CR3: 0000000017786000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400