BUG: MAX_LOCKDEP_KEYS too low!
turning off the locking correctness validator.
CPU: 1 UID: 0 PID: 13750 Comm: syz.0.10015 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+0xe8/0x150
 register_lock_class+0x2aa/0x2e0
 __lock_acquire+0xab/0x2cf0
 lock_acquire+0x106/0x350
 _raw_spin_lock_bh+0x36/0x50
 dev_reset_queue+0x138/0x1b0
 dev_deactivate_many+0x778/0xda0
 __dev_close_many+0x180/0x6e0
 netif_close_many+0x249/0x660
 unregister_netdevice_many_notify+0xb76/0x2150
 macvlan_device_event+0x7e8/0x880
 notifier_call_chain+0x1a5/0x3d0
 unregister_netdevice_many_notify+0x17de/0x2150
 rtnl_dellink+0x5be/0x810
 rtnetlink_rcv_msg+0x802/0xc00
 netlink_rcv_skb+0x226/0x4a0
 netlink_unicast+0x7bb/0x940
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x13a/0x180
 ____sys_sendmsg+0x54e/0x850
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1b1/0x290
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fca7d79de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fca7e6fd028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fca7da25fa0 RCX: 00007fca7d79de99
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 000000000000000d
RBP: 00007fca7d833eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fca7da26038 R14: 00007fca7da25fa0 R15: 00007ffd54f99cf8
 </TASK>
batadv0 (unregistering): left allmulticast mode
