BUG: MAX_LOCKDEP_ENTRIES too low!
turning off the locking correctness validator.
CPU: 1 PID: 17793 Comm: syz-executor.0 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 alloc_list_entry.cold+0x11/0x18 kernel/locking/lockdep.c:1329
 add_lock_to_list kernel/locking/lockdep.c:1350 [inline]
 check_prev_add kernel/locking/lockdep.c:2567 [inline]
 check_prevs_add kernel/locking/lockdep.c:2620 [inline]
 validate_chain kernel/locking/lockdep.c:3237 [inline]
 __lock_acquire+0x3096/0x4e00 kernel/locking/lockdep.c:4344
 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4923
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 spin_lock include/linux/spinlock.h:353 [inline]
 __netif_tx_lock include/linux/netdevice.h:4014 [inline]
 sch_direct_xmit+0x2be/0xc20 net/sched/sch_generic.c:311
 qdisc_restart net/sched/sch_generic.c:376 [inline]
 __qdisc_run+0x4d1/0x17b0 net/sched/sch_generic.c:384
 qdisc_run include/net/pkt_sched.h:134 [inline]
 qdisc_run include/net/pkt_sched.h:126 [inline]
 __dev_xmit_skb net/core/dev.c:3668 [inline]
 __dev_queue_xmit+0x2115/0x30a0 net/core/dev.c:4021
 neigh_resolve_output net/core/neighbour.c:1487 [inline]
 neigh_resolve_output+0x566/0x930 net/core/neighbour.c:1467
 neigh_output include/net/neighbour.h:510 [inline]
 ip6_finish_output2+0x1091/0x25b0 net/ipv6/ip6_output.c:117
 __ip6_finish_output+0x442/0xab0 net/ipv6/ip6_output.c:143
 ip6_finish_output+0x34/0x1f0 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x239/0x810 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:435 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 NF_HOOK include/linux/netfilter.h:301 [inline]
 mld_sendpack+0x961/0xdf0 net/ipv6/mcast.c:1682
 mld_send_cr net/ipv6/mcast.c:1978 [inline]
 mld_ifc_timer_expire+0x42e/0x920 net/ipv6/mcast.c:2477
 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1405
 expire_timers kernel/time/timer.c:1450 [inline]
 __run_timers kernel/time/timer.c:1774 [inline]
 __run_timers kernel/time/timer.c:1741 [inline]
 run_timer_softirq+0x623/0x1600 kernel/time/timer.c:1787
 __do_softirq+0x26c/0x9f7 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x192/0x1d0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:546 [inline]
 smp_apic_timer_interrupt+0x19e/0x600 arch/x86/kernel/apic/apic.c:1140
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 </IRQ>
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:batadv_hardif_get_by_netdev+0x10c/0x400 net/batman-adv/hard-interface.c:71
Code: 03 80 3c 10 00 0f 85 ef 02 00 00 4c 8b 25 2c 79 7c 05 49 be 00 00 00 00 00 fc ff df 49 81 fc 80 9c 20 8d 75 2d e9 e7 01 00 00 <e8> ef c5 ce f9 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 0f 85 95 02 00
RSP: 0018:ffffc900026f6df0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
RAX: ffff88807769c000 RBX: 0000000000000001 RCX: ffffffff87a425e7
RDX: 0000000000000000 RSI: ffffffff87a42399 RDI: ffff8880a739a818
RBP: 0000000000000000 R08: ffff88806b0203c0 R09: ffffed1015ce70f4
R10: ffffed1015ce70f3 R11: ffff8880ae73879b R12: ffff8880a739a800
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffffff8a7e08e0
 batadv_hard_if_event+0x107/0x1690 net/batman-adv/hard-interface.c:1031
 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83
 call_netdevice_notifiers_info net/core/dev.c:1948 [inline]
 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1933
 call_netdevice_notifiers_extack net/core/dev.c:1960 [inline]
 call_netdevice_notifiers net/core/dev.c:1974 [inline]
 __dev_notify_flags+0x121/0x2c0 net/core/dev.c:8181
 dev_change_flags+0x100/0x160 net/core/dev.c:8219
 do_setlink+0xa1c/0x3680 net/core/rtnetlink.c:2598
 __rtnl_newlink+0xad5/0x1590 net/core/rtnetlink.c:3266
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3391
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5454
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 __sys_sendto+0x220/0x330 net/socket.c:2000
 __do_sys_sendto net/socket.c:2012 [inline]
 __se_sys_sendto net/socket.c:2008 [inline]
 __x64_sys_sendto+0xdd/0x1b0 net/socket.c:2008
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x416583
Code: ff 0f 83 b0 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 0d 1f 87 00 00 75 17 49 89 ca b8 2c 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 81 19 00 00 c3 48 83 ec 08 e8 87 fa ff ff
RSP: 002b:00007ffd2f1fe918 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000c82200 RCX: 0000000000416583
RDX: 000000000000002c RSI: 0000000000c82250 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd2f1fe920 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000c82250 R15: 0000000000000003