__vm_munmap+0x137/0x230 mm/mmap.c:2952
 __do_sys_munmap mm/mmap.c:2978 [inline]
 __se_sys_munmap mm/mmap.c:2974 [inline]
 __x64_sys_munmap+0x67/0x70 mm/mmap.c:2974
 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: 5153 Comm: syz.2.177 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 89 6f db ff 4c 89 f7 48 c7 c6 00 f5 12 8a e8 7a da 0d 00 0f 0b e8 73 6f db ff 4c 89 f7 48 c7 c6 40 f5 12 8a e8 64 da 0d 00 <0f> 0b 48 85 ed 75 59 e8 58 6f db ff eb 5d e8 51 6f db ff 4c 89 f7
RSP: 0018:ffffc9000363f228 EFLAGS: 00010046
RAX: 6f59686fa4589500 RBX: 0000000000000000 RCX: ffff88802ada5940
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002d0559 R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: ffffea0001682ac0
R13: dffffc0000000000 R14: ffffea0001682ac0 R15: ffffea0001682ac8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30d034d12b CR3: 0000000022109000 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+0x4dc/0x1880 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
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0x61e/0x20a0 kernel/exit.c:883
 do_group_exit+0x12e/0x300 kernel/exit.c:997
 get_signal+0x6ca/0x12c0 kernel/signal.c:2900
 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0xee/0x180 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: 0033:0x7f71cb856749
Code: Unable to access opcode bytes at RIP 0x7f71cb85671f.
RSP: 002b:00007f71c9a9c038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: fffffffffffffe00 RBX: 00007f71cbaad090 RCX: 00007f71cb856749
RDX: 0000000000000300 RSI: 0000200000001640 RDI: 0000000000000004
RBP: 00007f71cb8daf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000034000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71cbaad128 R14: 00007f71cbaad090 R15: 00007ffe1da20578
 </TASK>
Modules linked in:
---[ end trace 4b8ac15a5750d849 ]---
RIP: 0010:unaccount_page_cache_page+0x75c/0x870 mm/filemap.c:166
Code: e8 89 6f db ff 4c 89 f7 48 c7 c6 00 f5 12 8a e8 7a da 0d 00 0f 0b e8 73 6f db ff 4c 89 f7 48 c7 c6 40 f5 12 8a e8 64 da 0d 00 <0f> 0b 48 85 ed 75 59 e8 58 6f db ff eb 5d e8 51 6f db ff 4c 89 f7
RSP: 0018:ffffc9000363f228 EFLAGS: 00010046
RAX: 6f59686fa4589500 RBX: 0000000000000000 RCX: ffff88802ada5940
RDX: 0000000000000000 RSI: 000000000000ffff RDI: 000000000000ffff
RBP: 1ffffd40002d0559 R08: dffffc0000000000 R09: ffffed1017204f2c
R10: ffffed1017204f2c R11: 1ffff11017204f2b R12: ffffea0001682ac0
R13: dffffc0000000000 R14: ffffea0001682ac0 R15: ffffea0001682ac8
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f30d034d12b CR3: 0000000022109000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400