IPv6: ADDRCONF(NETDEV_UP): ipvlan22: link is not ready input: syz0 as /devices/virtual/input/input679 8021q: adding VLAN 0 to HW filter on device ipvlan22 ============================================ WARNING: possible recursive locking detected 4.14.218-syzkaller #0 Not tainted -------------------------------------------- syz-executor.2/31887 is trying to acquire lock: (&team->lock){+.+.}, at: [] team_vlan_rx_add_vid+0x38/0x1d0 drivers/net/team/team.c:1889 but task is already holding lock: (&team->lock){+.+.}, at: [] team_add_slave+0x7d/0x1bc0 drivers/net/team/team.c:1967 input: syz0 as /devices/virtual/input/input680 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&team->lock); lock(&team->lock); *** DEADLOCK *** May be due to missing lock nesting notation 2 locks held by syz-executor.2/31887: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock net/core/rtnetlink.c:72 [inline] #0: (rtnl_mutex){+.+.}, at: [] rtnetlink_rcv_msg+0x31d/0xb10 net/core/rtnetlink.c:4311 #1: (&team->lock){+.+.}, at: [] team_add_slave+0x7d/0x1bc0 drivers/net/team/team.c:1967 stack backtrace: CPU: 0 PID: 31887 Comm: syz-executor.2 Not tainted 4.14.218-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+0x1b2/0x281 lib/dump_stack.c:58 print_deadlock_bug kernel/locking/lockdep.c:1800 [inline] check_deadlock kernel/locking/lockdep.c:1847 [inline] validate_chain kernel/locking/lockdep.c:2448 [inline] __lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 team_vlan_rx_add_vid+0x38/0x1d0 drivers/net/team/team.c:1889 __vlan_vid_add net/8021q/vlan_core.c:219 [inline] vlan_vid_add+0x5ef/0x7d0 net/8021q/vlan_core.c:251 __vlan_vid_add net/8021q/vlan_core.c:219 [inline] vlan_vid_add+0x5ef/0x7d0 net/8021q/vlan_core.c:251 vlan_device_event.cold+0x23/0x28 net/8021q/vlan.c:373 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] dev_open net/core/dev.c:1407 [inline] dev_open+0xf9/0x110 net/core/dev.c:1395 team_port_add drivers/net/team/team.c:1214 [inline] team_add_slave+0xa00/0x1bc0 drivers/net/team/team.c:1968 do_set_master+0x19e/0x200 net/core/rtnetlink.c:1961 rtnl_newlink+0x134c/0x1830 net/core/rtnetlink.c:2757 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4316 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2433 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 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+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007f342b1d6188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff42f2808f R14: 00007f342b1d6300 R15: 0000000000022000 team0: Port device ipvlan22 added input: syz0 as /devices/virtual/input/input681 input: syz0 as /devices/virtual/input/input684 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. input: syz0 as /devices/virtual/input/input685 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. input: syz0 as /devices/virtual/input/input687 netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. input: syz0 as /devices/virtual/input/input688 input: syz0 as /devices/virtual/input/input689 input: syz0 as /devices/virtual/input/input690 input: syz0 as /devices/virtual/input/input691 input: syz0 as /devices/virtual/input/input692 8021q: adding VLAN 0 to HW filter on device ipvlan23 input: syz0 as /devices/virtual/input/input693 input input694: cannot allocate more than FF_MAX_EFFECTS effects team0: Port device ipvlan23 added input input695: cannot allocate more than FF_MAX_EFFECTS effects input: syz0 as /devices/virtual/input/input696 8021q: adding VLAN 0 to HW filter on device ipvlan24 team0: Port device ipvlan24 added 8021q: adding VLAN 0 to HW filter on device ipvlan25 team0: Port device ipvlan25 added 8021q: adding VLAN 0 to HW filter on device ipvlan26 input: syz0 as /devices/virtual/input/input697 input: syz0 as /devices/virtual/input/input698 team0: Port device ipvlan26 added input: syz0 as /devices/virtual/input/input699 8021q: adding VLAN 0 to HW filter on device ipvlan27 input: syz0 as /devices/virtual/input/input700 team0: Port device ipvlan27 added