BUG: MAX_LOCKDEP_ENTRIES too low! turning off the locking correctness validator. CPU: 0 PID: 21221 Comm: syz-executor.1 Not tainted 5.4.0-rc3+ #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+0x113/0x167 lib/dump_stack.c:113 alloc_list_entry.cold.51+0x11/0x18 kernel/locking/lockdep.c:1292 add_lock_to_list kernel/locking/lockdep.c:1313 [inline] check_prev_add kernel/locking/lockdep.c:2528 [inline] check_prevs_add kernel/locking/lockdep.c:2581 [inline] validate_chain kernel/locking/lockdep.c:2971 [inline] __lock_acquire+0x2d21/0x4ef0 kernel/locking/lockdep.c:3955 lock_acquire+0x194/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] netif_addr_lock_bh include/linux/netdevice.h:4066 [inline] __dev_mc_add+0x27/0xb0 net/core/dev_addr_lists.c:765 dev_mc_add+0xb/0x10 net/core/dev_addr_lists.c:783 igmp6_group_added+0x2da/0x370 net/ipv6/mcast.c:672 __ipv6_dev_mc_inc+0x5f5/0x980 net/ipv6/mcast.c:931 ipv6_dev_mc_inc+0xb/0x10 net/ipv6/mcast.c:938 ipv6_add_dev+0x882/0xed0 net/ipv6/addrconf.c:456 addrconf_notify+0x4de/0x1fe0 net/ipv6/addrconf.c:3491 notifier_call_chain+0x8a/0x160 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:403 call_netdevice_notifiers_info+0x28/0x60 net/core/dev.c:1668 call_netdevice_notifiers_extack net/core/dev.c:1680 [inline] call_netdevice_notifiers net/core/dev.c:1694 [inline] register_netdevice+0x82e/0x1020 net/core/dev.c:8945 internal_dev_create+0x2bf/0x4d0 net/openvswitch/vport-internal_dev.c:191 ovs_vport_add+0x25c/0x500 net/openvswitch/vport.c:199 new_vport+0x15/0x1f0 net/openvswitch/datapath.c:194 ovs_dp_cmd_new+0x414/0xc20 net/openvswitch/datapath.c:1644 genl_family_rcv_msg+0x5cc/0x1150 net/netlink/genetlink.c:629 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:654 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2477 genl_rcv+0x23/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x43f/0x630 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x75d/0xc40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:657 ___sys_sendmsg+0x647/0x950 net/socket.c:2311 __sys_sendmsg+0xd9/0x180 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2363 do_syscall_64+0xca/0x5d0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a219 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:00007f9b8ba10c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a219 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9b8ba116d4 R13: 00000000004c86ec R14: 00000000004decb0 R15: 00000000ffffffff kobject: 'batman_adv' (00000000e4155f12): kobject_add_internal: parent: '718n', set: '' device 718n entered promiscuous mode