F2FS-fs (loop4): detect filesystem reference count leak during umount, type: 2, count: -1
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kernel BUG at fs/f2fs/super.c:2056!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 10938 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:f2fs_put_super+0x129e/0x12a0
Code: fd 41 bf 0d 00 00 00 48 89 df 44 89 fe e8 5a 3f 00 00 48 89 df 31 f6 48 c7 c2 00 e3 1a 8c 44 89 f9 49 89 c0 e8 d3 4e fd ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
RSP: 0018:ffffc9000712f900 EFLAGS: 00010246
RAX: 8d468eaccd63d800 RBX: ffff8881a8438000 RCX: 8d468eaccd63d800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000712fb58 R08: ffffc9000712f547 R09: 1ffff92000e25ea8
R10: dffffc0000000000 R11: fffff52000e25ea9 R12: ffff8881a8438000
R13: dffffc0000000000 R14: 00000000ffffffff R15: 0000000000000002
FS:  0000555574e21500(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b017262950 CR3: 000000019b712000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0x90
 kill_f2fs_super+0x402/0x720
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x32d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f663879d9d7
Code: a2 c7 05 1c fd 24 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffef91ab328 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6638832050 RCX: 00007f663879d9d7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffef91ab3e0
RBP: 00007ffef91ab3e0 R08: 00007ffef91ac3e0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffef91ac470
R13: 00007f6638832050 R14: 0000000000033cf7 R15: 00007ffef91ac4b0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_put_super+0x129e/0x12a0
Code: fd 41 bf 0d 00 00 00 48 89 df 44 89 fe e8 5a 3f 00 00 48 89 df 31 f6 48 c7 c2 00 e3 1a 8c 44 89 f9 49 89 c0 e8 d3 4e fd ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa
RSP: 0018:ffffc9000712f900 EFLAGS: 00010246
RAX: 8d468eaccd63d800 RBX: ffff8881a8438000 RCX: 8d468eaccd63d800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000712fb58 R08: ffffc9000712f547 R09: 1ffff92000e25ea8
R10: dffffc0000000000 R11: fffff52000e25ea9 R12: ffff8881a8438000
R13: dffffc0000000000 R14: 00000000ffffffff R15: 0000000000000002
FS:  0000555574e21500(0000) GS:ffff8882a945d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcbfbd40f8 CR3: 000000019b712000 CR4: 00000000000006f0
