device syzkaller1 entered promiscuous mode ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/24291 is trying to acquire lock: 00000000b97d9d1b (&dev_addr_list_lock_key/3){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] 00000000b97d9d1b (&dev_addr_list_lock_key/3){+...}, at: dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574 but task is already holding lock: 00000000c8ada9a8 (&dev_addr_list_lock_key/2){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] 00000000c8ada9a8 (&dev_addr_list_lock_key/2){+...}, at: dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&dev_addr_list_lock_key/2){+...}: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 __dev_mc_add net/core/dev_addr_lists.c:673 [inline] dev_mc_add+0xa1/0xb0 net/core/dev_addr_lists.c:687 igmp6_group_added+0x4bc/0x5d0 net/ipv6/mcast.c:676 __ipv6_dev_mc_inc+0x728/0xa80 net/ipv6/mcast.c:935 addrconf_join_solict net/ipv6/addrconf.c:2101 [inline] addrconf_join_solict net/ipv6/addrconf.c:2093 [inline] addrconf_dad_begin net/ipv6/addrconf.c:3895 [inline] addrconf_dad_work+0xb7d/0x10a0 net/ipv6/addrconf.c:4022 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 -> #1 (&vlan_netdev_addr_lock_key/1){+...}: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] dev_uc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:544 bond_set_rx_mode+0x321/0x490 drivers/net/bonding/bond_main.c:3641 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 dev_uc_sync_multiple+0x193/0x1e0 net/core/dev_addr_lists.c:577 bond_set_rx_mode+0x1ae/0x490 drivers/net/bonding/bond_main.c:3646 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 __dev_mc_add net/core/dev_addr_lists.c:673 [inline] dev_mc_add+0xa1/0xb0 net/core/dev_addr_lists.c:687 netlink: 36 bytes leftover after parsing attributes in process `syz-executor.1'. garp_init_applicant+0xf0/0x4b0 net/802/garp.c:590 register_vlan_dev+0x1a5/0x7d0 net/8021q/vlan.c:159 vlan_newlink+0x477/0x6d0 net/8021q/vlan_netlink.c:189 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&dev_addr_list_lock_key/3){+...}: _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:354 netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574 bond_set_rx_mode+0x1ae/0x490 drivers/net/bonding/bond_main.c:3646 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 dev_mc_sync+0x193/0x1e0 net/core/dev_addr_lists.c:768 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 dev_set_rx_mode net/core/dev.c:7607 [inline] __dev_open+0x26c/0x3a0 net/core/dev.c:1410 dev_open net/core/dev.c:1437 [inline] dev_open+0xde/0x140 net/core/dev.c:1430 bond_enslave+0x958/0x5250 drivers/net/bonding/bond_main.c:1561 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321 rtnl_newlink+0x1279/0x15c0 net/core/rtnetlink.c:3170 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &dev_addr_list_lock_key/3 --> &vlan_netdev_addr_lock_key/1 --> &dev_addr_list_lock_key/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&dev_addr_list_lock_key/2); lock(&vlan_netdev_addr_lock_key/1); lock(&dev_addr_list_lock_key/2); lock(&dev_addr_list_lock_key/3); *** DEADLOCK *** 4 locks held by syz-executor.2/24291: #0: 00000000df097c82 (rtnl_mutex){+.+.}, at: rtnl_lock net/core/rtnetlink.c:77 [inline] #0: 00000000df097c82 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x3fe/0xb80 net/core/rtnetlink.c:4779 #1: 00000000c4b5b755 (&vlan_netdev_addr_lock_key#3/4){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline] #1: 00000000c4b5b755 (&vlan_netdev_addr_lock_key#3/4){+...}, at: netif_addr_lock_bh include/linux/netdevice.h:4012 [inline] #1: 00000000c4b5b755 (&vlan_netdev_addr_lock_key#3/4){+...}, at: dev_set_rx_mode net/core/dev.c:7606 [inline] #1: 00000000c4b5b755 (&vlan_netdev_addr_lock_key#3/4){+...}, at: __dev_open+0x264/0x3a0 net/core/dev.c:1410 #2: 00000000c8ada9a8 (&dev_addr_list_lock_key/2){+...}, at: netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] #2: 00000000c8ada9a8 (&dev_addr_list_lock_key/2){+...}, at: dev_mc_sync+0x11a/0x1e0 net/core/dev_addr_lists.c:765 #3: 00000000a21b4074 (rcu_read_lock){....}, at: bond_set_rx_mode+0x0/0x490 drivers/net/bonding/bond_main.c:3481 stack backtrace: CPU: 0 PID: 24291 Comm: syz-executor.2 Not tainted 4.19.211-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+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 _raw_spin_lock_nested+0x30/0x40 kernel/locking/spinlock.c:354 netif_addr_lock_nested include/linux/netdevice.h:4007 [inline] dev_uc_sync_multiple+0x11a/0x1e0 net/core/dev_addr_lists.c:574 bond_set_rx_mode+0x1ae/0x490 drivers/net/bonding/bond_main.c:3646 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 dev_mc_sync+0x193/0x1e0 net/core/dev_addr_lists.c:768 vlan_dev_set_rx_mode+0x38/0x80 net/8021q/vlan_dev.c:488 __dev_set_rx_mode+0x1d9/0x2f0 net/core/dev.c:7601 dev_set_rx_mode net/core/dev.c:7607 [inline] __dev_open+0x26c/0x3a0 net/core/dev.c:1410 dev_open net/core/dev.c:1437 [inline] dev_open+0xde/0x140 net/core/dev.c:1430 bond_enslave+0x958/0x5250 drivers/net/bonding/bond_main.c:1561 do_set_master+0x1c8/0x220 net/core/rtnetlink.c:2321 rtnl_newlink+0x1279/0x15c0 net/core/rtnetlink.c:3170 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2227 __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f0dd339be99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0dd1d11168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0dd34aef60 RCX: 00007f0dd339be99 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000013 RBP: 00007f0dd33f5ff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdd24a1a9f R14: 00007f0dd1d11300 R15: 0000000000022000 device syzkaller1 entered promiscuous mode IPVS: ftp: loaded support on port[0] = 21 chnl_net:caif_netlink_parms(): no params data found bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode bond0: Enslaving bond_slave_0 as an active interface with an up link bond0: Enslaving bond_slave_1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added batman_adv: batadv0: Adding interface: batadv_slave_0 batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active batman_adv: batadv0: Adding interface: batadv_slave_1 batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready batman_adv: batadv0: Interface deactivated: batadv_slave_0 batman_adv: batadv0: Removing interface: batadv_slave_0 batman_adv: batadv0: Interface deactivated: batadv_slave_1 batman_adv: batadv0: Removing interface: batadv_slave_1 device bridge_slave_1 left promiscuous mode bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_0 left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state device veth1_macvtap left promiscuous mode device veth0_macvtap left promiscuous mode device veth1_vlan left promiscuous mode device veth0_vlan left promiscuous mode Bluetooth: hci3: command 0x0409 tx timeout bond0 (unregistering): Releasing backup interface batadv4 bond0 (unregistering): Releasing backup interface batadv3 bond0 (unregistering): Releasing backup interface batadv2 bond0 (unregistering): Releasing backup interface batadv1 device hsr_slave_1 left promiscuous mode device hsr_slave_0 left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready device hsr_slave_0 entered promiscuous mode device hsr_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready Bluetooth: hci3: command 0x041b tx timeout IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered forwarding state IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered forwarding state IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready device veth0_vlan entered promiscuous mode device veth1_vlan entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready device veth0_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready device veth1_macvtap entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready 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 ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready