============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
kworker/u8:0/12 is trying to acquire lock:
ffff88816d1cf218 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x22b7/0x3b50

but task is already holding lock:
ffff88811f8b6258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x138a/0x3b50

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

       CPU0
       ----
  lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3);
  lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

13 locks held by kworker/u8:0/12:
 #0: ffff888171bd2148 ((wq_completion)bond1){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90000117ba0 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: bond_alb_monitor+0xf1/0x1800
 #3: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: alb_send_learning_packets+0x119/0x2c0
 #4: ffffffff8df3d340 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #5: ffff88811f8b6258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x138a/0x3b50
 #6: ffff8881748d9558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0
 #7: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5b/0x450
 #8: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: __icmp_send+0x1b9/0x1320
 #9: ffff888168001fe0 (k-slock-AF_INET){+...}-{3:3}, at: __icmp_send+0x7ff/0x1320
 #10: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5b/0x450
 #11: ffffffff8df3d2e0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x452/0x1160
 #12: ffffffff8df3d340 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50

stack backtrace:
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: bond1 bond_alb_monitor
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_deadlock_bug+0x28b/0x2a0
 validate_chain+0x1a3f/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 __dev_queue_xmit+0x22b7/0x3b50
 ip_finish_output2+0xd40/0x1160
 ip_output+0x29f/0x450
 ip_push_pending_frames+0xbe/0x150
 __icmp_send+0xfc3/0x1320
 ip_fragment+0x17c/0x220
 ip_output+0x29f/0x450
 iptunnel_xmit+0x5f8/0xa90
 ip_tunnel_xmit+0x1c41/0x2390
 gre_tap_xmit+0x590/0x7a0
 dev_hard_start_xmit+0x2d7/0x830
 sch_direct_xmit+0x241/0x4b0
 __dev_queue_xmit+0x1857/0x3b50
 alb_send_lp_vid+0x324/0x510
 alb_upper_dev_walk+0x20a/0x3d0
 netdev_walk_all_upper_dev_rcu+0xfc/0x3e0
 alb_send_learning_packets+0x1e1/0x2c0
 bond_alb_monitor+0x3e4/0x1800
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
