BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 23360 Comm: syz-executor.2 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2840 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline]
 validate_chain kernel/locking/lockdep.c:2935 [inline]
 __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159
 debug_object_activate+0x131/0x470 lib/debugobjects.c:636
 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline]
 kfree_call_rcu+0x107/0x400 kernel/rcu/tree.c:2858
 __hw_addr_del_entry net/core/dev_addr_lists.c:107 [inline]
 __hw_addr_del_entry+0x2dd/0x3b0 net/core/dev_addr_lists.c:88
 __hw_addr_del_ex+0x129/0x150 net/core/dev_addr_lists.c:121
 __dev_mc_del+0x74/0xd0 net/core/dev_addr_lists.c:806
 igmp6_group_dropped+0x2f5/0x9b0 net/ipv6/mcast.c:708
 ipv6_mc_down+0x5c/0x120 net/ipv6/mcast.c:2541
 ipv6_mc_destroy_dev+0x1a/0x160 net/ipv6/mcast.c:2603
 addrconf_ifdown+0xd8a/0x12f0 net/ipv6/addrconf.c:3848
 addrconf_notify+0x5cd/0x2310 net/ipv6/addrconf.c:3639
 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]
 rollback_registered_many+0x75c/0xe70 net/core/dev.c:8810
 rollback_registered+0xf2/0x1c0 net/core/dev.c:8855
 unregister_netdevice_queue net/core/dev.c:9947 [inline]
 unregister_netdevice_queue+0x1d7/0x2b0 net/core/dev.c:9940
 unregister_netdevice include/linux/netdevice.h:2715 [inline]
 veth_newlink+0x630/0xa10 drivers/net/veth.c:1333
 __rtnl_newlink+0xf18/0x1590 net/core/rtnetlink.c:3319
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3377
 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5436
 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_sendmsg+0x6b9/0x7d0 net/socket.c:2345
 ___sys_sendmsg+0x100/0x170 net/socket.c:2399
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2432
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c849
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f38d9d0bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f38d9d0c6d4 RCX: 000000000045c849
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009fc R14: 00000000004ccb3c R15: 000000000076bf0c