============================================
WARNING: possible recursive locking detected
syzkaller #0 Tainted: G             L     
--------------------------------------------
syz.5.9718/7341 is trying to acquire lock:
ffff88817608e598 (&qdisc_xmit_lock_key#4){+...}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0

but task is already holding lock:
ffff888173acc598 (&qdisc_xmit_lock_key#4){+...}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0

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

       CPU0
       ----
  lock(&qdisc_xmit_lock_key#4);
  lock(&qdisc_xmit_lock_key#4);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

17 locks held by syz.5.9718/7341:
 #0: ffffffff8f8c59a8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff8f371f78 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0
 #2: ffffffff8de5f380 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420
 #3: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420
 #4: ffffffff8dfc82a0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2b3/0x3900
 #5: ffff88811466c328 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: __dev_queue_xmit+0x1110/0x3900
 #6: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x10c/0x2b0
 #7: ffff888173acc598 (&qdisc_xmit_lock_key#4){+...}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0
 #8: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400
 #9: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5b/0x450
 #10: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x3c2/0x10b0
 #11: ffffffff8de5f380 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420
 #12: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: arp_xmit+0x23/0x270
 #13: ffffffff8de5f380 (local_bh){.+.+}-{1:3}, at: __local_bh_disable_ip+0x3c/0x420
 #14: ffffffff8dfc82a0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2b3/0x3900
 #15: ffff888116834328 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: __dev_queue_xmit+0x1110/0x3900
 #16: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x10c/0x2b0

stack backtrace:
CPU: 1 UID: 0 PID: 7341 Comm: syz.5.9718 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_deadlock_bug+0x279/0x290
 __lock_acquire+0x255f/0x2d10
 lock_acquire+0x106/0x350
 rt_spin_lock+0x83/0x400
 sch_direct_xmit+0x15f/0x4c0
 __dev_queue_xmit+0x171e/0x3900
 NF_HOOK+0x33a/0x3c0
 arp_xmit+0x16c/0x270
 arp_solicit+0xc60/0xec0
 __neigh_event_send+0xeaf/0x1520
 neigh_resolve_output+0x19f/0x780
 ip_finish_output2+0xcec/0x10b0
 ip_output+0x29f/0x450
 iptunnel_xmit+0x654/0xda0
 ip_tunnel_xmit+0x193d/0x1f20
 __gre_xmit+0x19e/0x240
 erspan_xmit+0xa41/0x14d0
 dev_hard_start_xmit+0x2df/0x860
 sch_direct_xmit+0x251/0x4c0
 __dev_queue_xmit+0x171e/0x3900
 alb_send_lp_vid+0x348/0x550
 alb_send_learning_packets+0x12c/0x300
 alb_fasten_mac_swap+0x463/0x8b0
 bond_alb_handle_active_change+0xc8f/0xf60
 bond_change_active_slave+0x10b4/0x3710
 bond_select_active_slave+0x909/0xd40
 bond_enslave+0x2299/0x3c70
 do_set_master+0x533/0x6d0
 rtnl_newlink_create+0x6af/0xb70
 rtnl_newlink+0x166a/0x1bb0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
 netlink_unicast+0x780/0x920
 netlink_sendmsg+0x813/0xb40
 sock_sendmsg_nosec+0x112/0x150
 ____sys_sendmsg+0x55c/0x870
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1c3/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fee5a09cdd9
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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fee582f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fee5a315fa0 RCX: 00007fee5a09cdd9
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: 0000000000000007
RBP: 00007fee5a132d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fee5a316038 R14: 00007fee5a315fa0 R15: 00007ffdac0aaa58
 </TASK>
bond3: (slave erspan2): Enslaving as an active interface with an up link
syz.5.9718 (7341) used greatest stack depth: 16424 bytes left
