unmap_vmas+0x22c/0x330 mm/memory.c:1730
 exit_mmap+0x1cc/0x8e0 mm/mmap.c:3238
 __mmput+0x118/0x3c0 kernel/fork.c:1200
 exit_mm+0x1e6/0x2c0 kernel/exit.c:565
 do_exit+0x8b9/0x2400 kernel/exit.c:858
 do_group_exit+0x217/0x2d0 kernel/exit.c:1021
 get_signal+0x1272/0x1350 kernel/signal.c:2871
 arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 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
------------[ cut here ]------------
kernel BUG at mm/filemap.c:153!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5832 Comm: syz.2.319 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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 4a 71 27 00 e9 0c fe ff ff e8 b0 f8 d5 ff 48 89 df 48 c7 c6 60 0d 75 8a e8 a1 e1 11 00 <0f> 0b e8 9a f8 d5 ff 48 89 df 48 c7 c6 c0 12 75 8a e8 8b e1 11 00
RSP: 0018:ffffc9000457f4f8 EFLAGS: 00010046
RAX: b30d1a58a200a300 RBX: ffffea00011ecec0 RCX: b30d1a58a200a300
RDX: 0000000000000002 RSI: ffffffff8a6c1160 RDI: ffffffff8abf1360
RBP: ffffc9000457f658 R08: dffffc0000000000 R09: fffffbfff1bfd0b6
R10: fffffbfff1bfd0b6 R11: 1ffffffff1bfd0b5 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888076c91658 R15: ffff888076c91660
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c28e70b CR3: 000000005be4d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __filemap_remove_folio+0xbb/0x860 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+0x4d2/0x2050 mm/shmem.c:942
 shmem_truncate_range mm/shmem.c:1062 [inline]
 shmem_evict_inode+0x248/0xa40 mm/shmem.c:1171
 evict+0x485/0x870 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+0x1ca/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x936/0x2400 kernel/exit.c:871
 __do_sys_exit kernel/exit.c:988 [inline]
 __se_sys_exit kernel/exit.c:986 [inline]
 __x64_sys_exit+0x3c/0x40 kernel/exit.c:986
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f786758e929
Code: Unable to access opcode bytes at 0x7f786758e8ff.
RSP: 002b:00007f7868328f08 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 0000000000000058 RCX: 00007f786758e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7867610b39 R08: 0000000000000058 R09: 0000000000000058
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f78677b5fa0 R15: 00007ffc69169148
 </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 4a 71 27 00 e9 0c fe ff ff e8 b0 f8 d5 ff 48 89 df 48 c7 c6 60 0d 75 8a e8 a1 e1 11 00 <0f> 0b e8 9a f8 d5 ff 48 89 df 48 c7 c6 c0 12 75 8a e8 8b e1 11 00
RSP: 0018:ffffc9000457f4f8 EFLAGS: 00010046
RAX: b30d1a58a200a300 RBX: ffffea00011ecec0 RCX: b30d1a58a200a300
RDX: 0000000000000002 RSI: ffffffff8a6c1160 RDI: ffffffff8abf1360
RBP: ffffc9000457f658 R08: dffffc0000000000 R09: fffffbfff1bfd0b6
R10: fffffbfff1bfd0b6 R11: 1ffffffff1bfd0b5 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888076c91658 R15: ffff888076c91660
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c28e70b CR3: 000000005be4d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400