batman_adv: batadv0: Interface activated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready BUG: spinlock recursion on CPU#1, syz-executor.2/8828 lock: 0xffff88807c2787e8, .magic: dead4ead, .owner: syz-executor.2/8828, .owner_cpu: 1 CPU: 1 PID: 8828 Comm: syz-executor.2 Not tainted 4.14.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x13e/0x194 lib/dump_stack.c:58 spin_bug kernel/locking/spinlock_debug.c:75 [inline] debug_spin_lock_before kernel/locking/spinlock_debug.c:84 [inline] do_raw_spin_lock+0x1cd/0x230 kernel/locking/spinlock_debug.c:112 netif_addr_lock_nested include/linux/netdevice.h:3699 [inline] dev_mc_sync+0x10b/0x1c0 net/core/dev_addr_lists.c:765 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:486 __dev_set_rx_mode+0x191/0x2a0 net/core/dev.c:6718 dev_uc_unsync net/core/dev_addr_lists.c:600 [inline] dev_uc_unsync+0x16c/0x1c0 net/core/dev_addr_lists.c:592 bond_hw_addr_flush+0x5c/0xe0 drivers/net/bonding/bond_main.c:559 bond_enslave+0x1e53/0x49e0 drivers/net/bonding/bond_main.c:1779 do_set_master net/core/rtnetlink.c:1961 [inline] do_set_master+0x19e/0x200 net/core/rtnetlink.c:1936 rtnl_newlink+0x1319/0x1720 net/core/rtnetlink.c:2756 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4315 netlink_rcv_skb+0x127/0x370 net/netlink/af_netlink.c:2432 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x437/0x620 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x733/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xc5/0x100 net/socket.c:656 ___sys_sendmsg+0x70a/0x840 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c479 RSP: 002b:00007f3846a91c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3846a926d4 RCX: 000000000045c479 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 000000000000000d RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000009f9 R14: 00000000004cc71a R15: 000000000076bf2c