BUG: MAX_LOCKDEP_ENTRIES too low! turning off the locking correctness validator. CPU: 1 PID: 14862 Comm: syz-executor509 Not tainted 5.4.0-rc7+ #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+0x197/0x210 lib/dump_stack.c:118 alloc_list_entry.cold+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+0x2a15/0x4a00 kernel/locking/lockdep.c:3955 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4487 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] netif_addr_lock_bh include/linux/netdevice.h:4055 [inline] __dev_mc_add+0x2e/0xd0 net/core/dev_addr_lists.c:765 dev_mc_add+0x20/0x30 net/core/dev_addr_lists.c:783 igmp6_group_added+0x3b5/0x460 net/ipv6/mcast.c:672 __ipv6_dev_mc_inc+0x727/0xa60 net/ipv6/mcast.c:931 ipv6_dev_mc_inc+0x20/0x30 net/ipv6/mcast.c:938 ipv6_add_dev net/ipv6/addrconf.c:456 [inline] ipv6_add_dev+0xa3d/0x10b0 net/ipv6/addrconf.c:363 addrconf_notify+0x97d/0x23b0 net/ipv6/addrconf.c:3491 notifier_call_chain+0xc2/0x230 kernel/notifier.c:95 __raw_notifier_call_chain kernel/notifier.c:396 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:403 call_netdevice_notifiers_info+0x3f/0x90 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+0x950/0xeb0 net/core/dev.c:9115 internal_dev_create+0x312/0x550 net/openvswitch/vport-internal_dev.c:191 ovs_vport_add+0x150/0x500 net/openvswitch/vport.c:199 new_vport+0x1b/0x1d0 net/openvswitch/datapath.c:194 ovs_dp_cmd_new+0x5e5/0xe30 net/openvswitch/datapath.c:1644 genl_family_rcv_msg+0x74b/0xf90 net/netlink/genetlink.c:629 genl_rcv_msg+0xca/0x170 net/netlink/genetlink.c:654 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 genl_rcv+0x29/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x441779 Code: e8 9c 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 1b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffede1e3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441779 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000004fa7c R08: 00007ffe00000025 R09: 00007ffe00000025 R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006cdbc0 R13: 0000000000000013 R14: 0000000000000000 R15: 0000000000000000 kobject: 'batman_adv' (00000000c105eea3): kobject_add_internal: parent: '5389n', set: '' device 5389n entered promiscuous mode