F2FS-fs (loop1): invalid crc value
F2FS-fs (loop1): invalid crc value
F2FS-fs (loop1): Failed to get valid F2FS checkpoint
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8057 Comm: syz.1.560 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:986
 register_lock_class+0xcc/0x2e0 kernel/locking/lockdep.c:1301
 __lock_acquire+0xad/0x2d10 kernel/locking/lockdep.c:5114
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5870
 rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 f2fs_exist_written_data+0x53/0x90 fs/f2fs/checkpoint.c:787
 f2fs_drop_inode+0xda/0xbf0 fs/f2fs/super.c:1852
 iput_final fs/inode.c:1926 [inline]
 iput+0x651/0xe80 fs/inode.c:2009
 f2fs_fill_super+0x6047/0x7850 fs/f2fs/super.c:5461
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3758 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3834
 do_mount fs/namespace.c:4167 [inline]
 __do_sys_mount fs/namespace.c:4383 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4360
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f563251e04a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f563076de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f563076dee0 RCX: 00007f563251e04a
RDX: 0000200000000040 RSI: 0000200000000000 RDI: 00007f563076dea0
RBP: 0000200000000040 R08: 00007f563076dee0 R09: 0000000000200400
R10: 0000000000200400 R11: 0000000000000246 R12: 0000200000000000
R13: 00007f563076dea0 R14: 0000000000005548 R15: 0000200000000080
 </TASK>
__loop_clr_fd(loop1) clearing lo_backing_file with raw_refcnt=0x0, refcnt=1