------------[ cut here ]------------
WARNING: CPU: 1 PID: 47 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180
Modules linked in:
CPU: 1 UID: 0 PID: 47 Comm: kworker/1:1 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
Workqueue: events destroy_super_work
RIP: 0010:rcu_sync_dtor+0xcd/0x180
Code: 18 e8 87 c7 00 00 43 0f b6 44 25 00 84 c0 0f 85 82 00 00 00 83 3b 00 75 1f 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 <0f> 0b 90 e9 66 ff ff ff 90 0f 0b 90 eb 8a 90 0f 0b 90 eb db 89 d9
RSP: 0018:ffffc9000075f9e8 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff888032fd0358 RCX: 04a7bcc57bb1df00
RDX: 0000000000000000 RSI: ffffffff8be34360 RDI: ffff888032fd0358
RBP: 0000000000000282 R08: ffffffff8dfdd5ef R09: 1ffffffff1bfbabd
R10: dffffc0000000000 R11: fffffbfff1bfbabe R12: dffffc0000000000
R13: 1ffff110065fa06b R14: ffff888032fd0358 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1cc3f056c0 CR3: 000000001f76e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 percpu_free_rwsem+0x40/0x80
 destroy_super_work+0xee/0x130
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
