F2FS-fs (loop3): invalid crc value
F2FS-fs (loop3): invalid crc value
F2FS-fs (loop3): 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: 12638 Comm: syz.3.2038 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 assign_lock_key+0x133/0x150
 register_lock_class+0xcc/0x2e0
 __lock_acquire+0xad/0x2d10
 lock_acquire+0x106/0x350
 rt_spin_lock+0x83/0x400
 f2fs_exist_written_data+0x53/0x90
 f2fs_drop_inode+0xda/0xbf0
 iput+0x651/0xe80
 f2fs_fill_super+0x6047/0x7850
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3cfe0ee04a
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:00007f3cfc2fbe58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3cfc2fbee0 RCX: 00007f3cfe0ee04a
RDX: 0000200000000000 RSI: 00002000000003c0 RDI: 00007f3cfc2fbea0
RBP: 0000200000000000 R08: 00007f3cfc2fbee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000003c0
R13: 00007f3cfc2fbea0 R14: 00000000000055b1 R15: 0000200000000440
 </TASK>
__loop_clr_fd(loop3) clearing lo_backing_file with raw_refcnt=0x0, refcnt=1
