BUG: MAX_LOCKDEP_KEYS too low! turning off the locking correctness validator. CPU: 1 PID: 23703 Comm: syz-executor559 Not tainted 5.7.0-rc5-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 register_lock_class.cold+0x11/0x19 kernel/locking/lockdep.c:1257 __lock_acquire+0x104/0x4c50 kernel/locking/lockdep.c:4234 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4934 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:358 [inline] netif_addr_lock_bh include/linux/netdevice.h:4172 [inline] __dev_mc_add+0x28/0xd0 net/core/dev_addr_lists.c:765 igmp6_group_added+0x375/0x420 net/ipv6/mcast.c:672 __ipv6_dev_mc_inc+0x819/0xca0 net/ipv6/mcast.c:931 ipv6_add_dev net/ipv6/addrconf.c:458 [inline] ipv6_add_dev+0xa3d/0x10b0 net/ipv6/addrconf.c:365 addrconf_notify+0x960/0x2310 net/ipv6/addrconf.c:3503 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] register_netdevice+0xd70/0x10b0 net/core/dev.c:9435 veth_newlink+0x41e/0xa10 drivers/net/veth.c:1366 __rtnl_newlink+0xf18/0x1590 net/core/rtnetlink.c:3333 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_sendmsg+0x6bf/0x7e0 net/socket.c:2362 ___sys_sendmsg+0x100/0x170 net/socket.c:2416 __sys_sendmsg+0xec/0x1b0 net/socket.c:2449 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x441399 Code: e8 5c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff8f8413c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441399 RDX: 0000000004000040 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00007fff8f8413d0 R08: 0000000100000000 R09: 0000000100000000 R10: 0000000100000000 R11: 0000000000000246 R12: 000000000004ad76 R13: 00000000004022f0 R14: 0000000000000000 R15: 0000000000000000