syzkaller0: entered promiscuous mode
syzkaller0: entered allmulticast mode
BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 18824 Comm: syz.1.11780 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
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 register_lock_class+0x2e8/0x320
 __lock_acquire+0x99/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock_bh+0x36/0x50
 dev_reset_queue+0x138/0x1b0
 dev_deactivate_many+0x720/0xd40
 __dev_close_many+0x162/0x6f0
 netif_close_many+0x225/0x410
 unregister_netdevice_many_notify+0xb29/0x2390
 unregister_netdevice_queue+0x33c/0x380
 __tun_detach+0x6d9/0x15d0
 tun_chr_close+0x10a/0x1c0
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1285/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 exit_to_user_mode_loop+0x72/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efc6a18efc9
Code: Unable to access opcode bytes at 0x7efc6a18ef9f.
RSP: 002b:00007efc6afb7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007efc6a3e6090 RCX: 00007efc6a18efc9
RDX: 0000200000000a80 RSI: 0000000000008914 RDI: 0000000000000003
RBP: 00007efc6a211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efc6a3e6128 R14: 00007efc6a3e6090 R15: 00007ffedaf28268
 </TASK>
