BUG: MAX_LOCKDEP_ENTRIES too low! turning off the locking correctness validator. CPU: 0 PID: 13396 Comm: syz-executor535 Not tainted 5.7.0-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 Call Trace: __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:1310 add_lock_to_list kernel/locking/lockdep.c:1331 [inline] check_prev_add kernel/locking/lockdep.c:2548 [inline] check_prevs_add kernel/locking/lockdep.c:2601 [inline] validate_chain kernel/locking/lockdep.c:3218 [inline] __lock_acquire+0x2ec2/0x48a0 kernel/locking/lockdep.c:4380 lock_acquire+0x1f2/0x8f0 kernel/locking/lockdep.c:4959 __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] ____cache_alloc_node+0x3c/0x1d0 mm/slab.c:3184 __do_cache_alloc mm/slab.c:3284 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc_trace+0x21a/0x7d0 mm/slab.c:3549 kmalloc include/linux/slab.h:555 [inline] __hw_addr_create_ex+0x5b/0x310 net/core/dev_addr_lists.c:30 __hw_addr_add_ex+0x1ed/0x2b0 net/core/dev_addr_lists.c:76 __dev_mc_add+0x76/0xd0 net/core/dev_addr_lists.c:766 igmp6_group_added+0x375/0x420 net/ipv6/mcast.c:669 __ipv6_dev_mc_inc+0x819/0xca0 net/ipv6/mcast.c:928 ipv6_add_dev net/ipv6/addrconf.c:456 [inline] ipv6_add_dev+0x99d/0x1090 net/ipv6/addrconf.c:364 addrconf_notify+0x89c/0x2250 net/ipv6/addrconf.c:3462 notifier_call_chain+0xc0/0x230 kernel/notifier.c:83 call_netdevice_notifiers_info net/core/dev.c:2016 [inline] call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2001 call_netdevice_notifiers_extack net/core/dev.c:2028 [inline] call_netdevice_notifiers net/core/dev.c:2042 [inline] register_netdevice+0xd70/0x10b0 net/core/dev.c:9541 br_dev_newlink+0x23/0x110 net/bridge/br_netlink.c:1347 __rtnl_newlink+0xf16/0x1590 net/core/rtnetlink.c:3340 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3398 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5461 netlink_rcv_skb+0x15a/0x430 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+0x6e6/0x810 net/socket.c:2352 ___sys_sendmsg+0x100/0x170 net/socket.c:2406 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2439 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x434c89 Code: e8 0c 4f 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 db d1 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcc4807818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000434c89 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007ffcc4807830 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000c7e93 R14: 0000000000000000 R15: 0000000000000000 device bridge4026 entered promiscuous mode