======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
kworker/u8:1/13 is trying to acquire lock:
ffff88810ffb8ff0 (&hsr->seqnr_lock){+.-.}-{3:3}, at: hsr_dev_xmit+0x237/0x360

but task is already holding lock:
ffff8881047fe958 (&qdisc_xmit_lock_key#3){+.-.}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&qdisc_xmit_lock_key#3){+.-.}-{3:3}:
       _raw_spin_lock+0x2e/0x40
       sch_direct_xmit+0x15f/0x4c0
       __dev_queue_xmit+0x180f/0x3950
       hsr_forward_skb+0x167e/0x2a80
       hsr_dev_xmit+0x242/0x360
       dev_hard_start_xmit+0x2cd/0x830
       __dev_queue_xmit+0x14d9/0x3950
       ip6_output+0x340/0x550
       NF_HOOK+0x177/0x4f0
       mld_sendpack+0x8b4/0xe40
       mld_ifc_work+0x835/0xe70
       process_scheduled_works+0xb5d/0x1860
       worker_thread+0xa53/0xfc0
       kthread+0x388/0x470
       ret_from_fork+0x514/0xb70
       ret_from_fork_asm+0x1a/0x30

-> #0 (&hsr->seqnr_lock){+.-.}-{3:3}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x350
       _raw_spin_lock_bh+0x36/0x50
       hsr_dev_xmit+0x237/0x360
       dev_hard_start_xmit+0x2cd/0x830
       __dev_queue_xmit+0x14d9/0x3950
       NF_HOOK+0x33a/0x3c0
       arp_xmit+0x16c/0x270
       arp_solicit+0xbe0/0xe40
       __neigh_event_send+0xf05/0x14d0
       neigh_resolve_output+0x198/0x750
       ip_finish_output2+0xca9/0x1070
       ip_output+0x29f/0x450
       iptunnel_xmit+0x621/0xd10
       ip_tunnel_xmit+0x193a/0x1f20
       __gre_xmit+0x19e/0x240
       erspan_xmit+0xa41/0x14d0
       dev_hard_start_xmit+0x2cd/0x830
       sch_direct_xmit+0x251/0x4c0
       __dev_queue_xmit+0x180f/0x3950
       alb_send_lp_vid+0x348/0x550
       alb_send_learning_packets+0x12c/0x300
       bond_alb_monitor+0x3d5/0x17e0
       process_scheduled_works+0xb5d/0x1860
       worker_thread+0xa53/0xfc0
       kthread+0x388/0x470
       ret_from_fork+0x514/0xb70
       ret_from_fork_asm+0x1a/0x30

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&qdisc_xmit_lock_key#3);
                               lock(&hsr->seqnr_lock);
                               lock(&qdisc_xmit_lock_key#3);
  lock(&hsr->seqnr_lock);

 *** DEADLOCK ***

11 locks held by kworker/u8:1/13:
 #0: ffff88817558c140 ((wq_completion)bond7){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000127c40 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: bond_alb_monitor+0xf8/0x17e0
 #3: ffffffff8e95cdc0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2b6/0x3950
 #4: ffff8881a1af1228 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#4){+...}-{3:3}, at: __dev_queue_xmit+0x11a6/0x3950
 #5: ffff8881047fe958 (&qdisc_xmit_lock_key#3){+.-.}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0
 #6: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5b/0x450
 #7: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x3c2/0x1070
 #8: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: arp_xmit+0x23/0x270
 #9: ffffffff8e95cdc0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x2b6/0x3950
 #10: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: hsr_dev_xmit+0x2d/0x360

stack backtrace:
CPU: 1 UID: 0 PID: 13 Comm: kworker/u8:1 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: bond7 bond_alb_monitor
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_circular_bug+0x2e1/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a5/0x2cf0
 lock_acquire+0x106/0x350
 _raw_spin_lock_bh+0x36/0x50
 hsr_dev_xmit+0x237/0x360
 dev_hard_start_xmit+0x2cd/0x830
 __dev_queue_xmit+0x14d9/0x3950
 NF_HOOK+0x33a/0x3c0
 arp_xmit+0x16c/0x270
 arp_solicit+0xbe0/0xe40
 __neigh_event_send+0xf05/0x14d0
 neigh_resolve_output+0x198/0x750
 ip_finish_output2+0xca9/0x1070
 ip_output+0x29f/0x450
 iptunnel_xmit+0x621/0xd10
 ip_tunnel_xmit+0x193a/0x1f20
 __gre_xmit+0x19e/0x240
 erspan_xmit+0xa41/0x14d0
 dev_hard_start_xmit+0x2cd/0x830
 sch_direct_xmit+0x251/0x4c0
 __dev_queue_xmit+0x180f/0x3950
 alb_send_lp_vid+0x348/0x550
 alb_send_learning_packets+0x12c/0x300
 bond_alb_monitor+0x3d5/0x17e0
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
hsr_slave_0: hsr_addr_subst_dest: Unknown node
