raw: 05ffc00000080015 fffffc0003ac9588 fffffc0003a99808 ffff0000c1210fc0
raw: 0000000000000002 0000000000000000 0000000400000000 ffff0000ddf64000
page dumped because: VM_BUG_ON_PAGE(page_mapped(page))
------------[ cut here ]------------
kernel BUG at mm/filemap.c:166!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4837 Comm: syz.0.185 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : unaccount_page_cache_page+0x600/0x744 mm/filemap.c:166
lr : unaccount_page_cache_page+0x600/0x744 mm/filemap.c:166
sp : ffff80001fe671c0
x29: ffff80001fe671c0 x28: ffff700003fcce4c x27: ffff80001fe67570
x26: 1fffff8000759291 x25: dfff800000000000 x24: fffffc0003ac9588
x23: 0000000000000000 x22: fffffc0003ac9588 x21: fffffc0003ac9488
x20: ffff0000c1210fc0 x19: fffffc0003ac9480 x18: 0000000000000002
x17: 0000000000000000 x16: ffff8000111a97c4 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: 0000000000000001 x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 36f9855bdbfa7200
x8 : 36f9855bdbfa7200 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff80001fe667d8 x4 : ffff80001423f280 x3 : ffff800008503958
x2 : 0000000000000001 x1 : 0000000100000001 x0 : 0000000000000036
Call trace:
 unaccount_page_cache_page+0x600/0x744 mm/filemap.c:166
 __delete_from_page_cache+0xc0/0x5b8 mm/filemap.c:231
 delete_from_page_cache+0x104/0x178 mm/filemap.c:266
 truncate_inode_page+0x98/0xc8 mm/truncate.c:219
 shmem_undo_range+0x3c8/0x1234 mm/shmem.c:960
 shmem_truncate_range mm/shmem.c:1063 [inline]
 shmem_evict_inode+0x1c0/0x838 mm/shmem.c:1145
 evict+0x3c8/0x810 fs/inode.c:647
 iput_final fs/inode.c:1769 [inline]
 iput+0x6c4/0x77c fs/inode.c:1795
 dentry_unlink_inode+0x360/0x438 fs/dcache.c:380
 __dentry_kill+0x320/0x598 fs/dcache.c:586
 dentry_kill+0xc8/0x248 fs/dcache.c:-1
 dput+0x23c/0x458 fs/dcache.c:893
 __fput+0x494/0x7f8 fs/file_table.c:319
 ____fput+0x20/0x30 fs/file_table.c:339
 task_work_run+0x12c/0x1e0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x24b4/0x3128 arch/arm64/kernel/signal.c:949
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xf0/0x1e0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 90046841 911b8021 aa1303e0 9403338b (d4210000) 
---[ end trace 3bf2d08a73565c7b ]---