syzbot

netlink: 'syz-executor855': attribute type 10 has an invalid length.
veth0_vlan: left promiscuous mode
veth0_vlan: entered promiscuous mode
============================================
WARNING: possible recursive locking detected
6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0 Not tainted
--------------------------------------------
syz-executor855/5927 is trying to acquire lock:
ffff888032c84e00 (team->team_lock_key){+.+.}-{4:4}, at: team_port_change_check drivers/net/team/team_core.c:2949 [inline]
ffff888032c84e00 (team->team_lock_key){+.+.}-{4:4}, at: team_device_event+0x2c7/0x770 drivers/net/team/team_core.c:2972

but task is already holding lock:
ffff888032c84e00 (team->team_lock_key){+.+.}-{4:4}, at: team_add_slave+0x9c/0x20e0 drivers/net/team/team_core.c:1974

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(team->team_lock_key);
  lock(team->team_lock_key);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by syz-executor855/5927:
 #0: ffffffff8feda348 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8feda348 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
 #0: ffffffff8feda348 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x5e4/0x1ce0 net/core/rtnetlink.c:4008
 #1: ffff888032c84e00 (team->team_lock_key){+.+.}-{4:4}, at: team_add_slave+0x9c/0x20e0 drivers/net/team/team_core.c:1974

stack backtrace:
CPU: 0 UID: 0 PID: 5927 Comm: syz-executor855 Not tainted 6.13.0-rc1-syzkaller-00337-g7503345ac5f5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x2e3/0x410 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain kernel/locking/lockdep.c:3891 [inline]
 __lock_acquire+0x2117/0x3c40 kernel/locking/lockdep.c:5226
 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735
 team_port_change_check drivers/net/team/team_core.c:2949 [inline]
 team_device_event+0x2c7/0x770 drivers/net/team/team_core.c:2972
 notifier_call_chain+0xb7/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 __dev_notify_flags+0x12d/0x2e0 net/core/dev.c:8988
 dev_change_flags+0x10c/0x160 net/core/dev.c:9026
 vlan_device_event+0xdfc/0x2120 net/8021q/vlan.c:468
 notifier_call_chain+0xb7/0x410 kernel/notifier.c:85
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 dev_open net/core/dev.c:1517 [inline]
 dev_open+0x144/0x160 net/core/dev.c:1505
 team_port_add drivers/net/team/team_core.c:1216 [inline]
 team_add_slave+0xacd/0x20e0 drivers/net/team/team_core.c:1975
 do_set_master+0x1bc/0x230 net/core/rtnetlink.c:2917
 do_setlink.constprop.0+0xb60/0x3f70 net/core/rtnetlink.c:3116
 rtnl_changelink net/core/rtnetlink.c:3723 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3874 [inline]
 rtnl_newlink+0x12ce/0x1ce0 net/core/rtnetlink.c:4009
 rtnetlink_rcv_msg+0x95b/0xea0 net/core/rtnetlink.c:6919
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2542
 netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:711 [inline]
 __sock_sendmsg net/socket.c:726 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2583
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
 __sys_sendmsg+0x16e/0x220 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b6cca0e49
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffd648e828 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7b6ccee4c5 RCX: 00007f7b6cca0e49
RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000000000004
RBP: 00007f7b6ccee4a3 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f7b6ccee428
R13: 00007f7b6ccee004 R14: 00007fffd648e84c R15: 0000000000000003
 </TASK>