__vm_munmap+0x137/0x230 mm/mmap.c:2948
 __do_sys_munmap mm/mmap.c:2974 [inline]
 __se_sys_munmap mm/mmap.c:2970 [inline]
 __x64_sys_munmap+0x67/0x70 mm/mmap.c:2970
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
------------[ cut here ]------------
kernel BUG at mm/filemap.c:166!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5346 Comm: syz.5.205 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 29 5b da ff 4c 89 f7 48 c7 c6 c0 fa 12 8a e8 aa db 0d 00 0f 0b e8 13 5b da ff 4c 89 f7 48 c7 c6 00 fb 12 8a e8 94 db 0d 00 <0f> 0b 48 85 ed 75 59 e8 f8 5a da ff eb 5d e8 f1 5a da ff 4c 89 f7
RSP: 0018:ffffc9000330f688 EFLAGS: 00010046
RAX: a1e115ba7d410800 RBX: 0000000000000000 RCX: ffff88801e2c1dc0
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002d6941 R08: dffffc0000000000 R09: fffff52000661db5
R10: fffff52000661db5 R11: 1ffff92000661db4 R12: ffffea00016b4a00
R13: dffffc0000000000 R14: ffffea00016b4a00 R15: ffffea00016b4a08
FS:  0000555560ec6500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 000000007450b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __delete_from_page_cache+0xbf/0x6b0 mm/filemap.c:231
 delete_from_page_cache+0x121/0x190 mm/filemap.c:266
 truncate_inode_page+0x8d/0xb0 mm/truncate.c:219
 shmem_undo_range+0x49b/0x1840 mm/shmem.c:960
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x20d/0xa00 mm/shmem.c:1145
 evict+0x485/0x870 fs/inode.c:647
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 __fput+0x5ee/0x930 fs/file_table.c:319
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f8bc6b84929
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:00007ffc50e9b208 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000002c6a4 RCX: 00007f8bc6b84929
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f8bc6dadba0 R08: 0000000000000001 R09: 0000000750e9b4ff
R10: 00007f8bc69f6000 R11: 0000000000000246 R12: 00007f8bc6dabfac
R13: 00007f8bc6dabfa0 R14: ffffffffffffffff R15: 00007ffc50e9b320
 </TASK>
Modules linked in:
---[ end trace fe28c061b5c1a368 ]---
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 29 5b da ff 4c 89 f7 48 c7 c6 c0 fa 12 8a e8 aa db 0d 00 0f 0b e8 13 5b da ff 4c 89 f7 48 c7 c6 00 fb 12 8a e8 94 db 0d 00 <0f> 0b 48 85 ed 75 59 e8 f8 5a da ff eb 5d e8 f1 5a da ff 4c 89 f7
RSP: 0018:ffffc9000330f688 EFLAGS: 00010046
RAX: a1e115ba7d410800 RBX: 0000000000000000 RCX: ffff88801e2c1dc0
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002d6941 R08: dffffc0000000000 R09: fffff52000661db5
R10: fffff52000661db5 R11: 1ffff92000661db4 R12: ffffea00016b4a00
R13: dffffc0000000000 R14: ffffea00016b4a00 R15: ffffea00016b4a08
FS:  0000555560ec6500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 000000007450b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400