bond39: (slave gretap3): the permanent HWaddr of slave - aa:83:d6:2a:59:f5 - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts
bond39: (slave gretap4): making interface the new active one
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.1865/13529 is trying to acquire lock:
ffff88803b194f30 (&hsr->seqnr_lock){+.-.}-{3:3}, at: hsr_dev_xmit+0x19a/0x220

but task is already holding lock:
ffff88802b37e958 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}:
       lock_acquire+0x120/0x360
       _raw_spin_lock+0x2e/0x40
       sch_direct_xmit+0x153/0x4b0
       __dev_queue_xmit+0x1857/0x3b50
       hsr_forward_skb+0x158b/0x2860
       send_prp_supervision_frame+0x35b/0x6c0
       hsr_announce+0x1d5/0x360
       call_timer_fn+0x17e/0x5f0
       __run_timer_base+0x61a/0x860
       run_timer_softirq+0xb7/0x180
       handle_softirqs+0x286/0x870
       __irq_exit_rcu+0xca/0x1f0
       irq_exit_rcu+0x9/0x30
       sysvec_apic_timer_interrupt+0xa6/0xc0
       asm_sysvec_apic_timer_interrupt+0x1a/0x20
       _raw_spin_unlock_irqrestore+0xa8/0x110
       debug_check_no_obj_freed+0x451/0x470
       __free_frozen_pages+0x4dd/0xd30
       free_large_kmalloc+0x13a/0x1f0
       drain_mem_cache+0x1d8/0x480
       bpf_mem_alloc_destroy+0x13d/0x4d0
       htab_map_free+0x88f/0x980
       bpf_map_free_deferred+0x113/0x140
       process_scheduled_works+0xae1/0x17b0
       worker_thread+0x8a0/0xda0
       kthread+0x711/0x8a0
       ret_from_fork+0x3fc/0x770
       ret_from_fork_asm+0x1a/0x30

-> #0 (&hsr->seqnr_lock){+.-.}-{3:3}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       _raw_spin_lock_bh+0x36/0x50
       hsr_dev_xmit+0x19a/0x220
       dev_hard_start_xmit+0x2d7/0x830
       __dev_queue_xmit+0x1b8d/0x3b50
       ip_finish_output2+0xd40/0x1160
       ip_output+0x2a1/0x3c0
       iptunnel_xmit+0x592/0xa40
       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_send_learning_packets+0x10d/0x2c0
       bond_alb_handle_active_change+0xa09/0xec0
       bond_change_active_slave+0x1048/0x3770
       bond_select_active_slave+0x8e2/0xd00
       __bond_release_one+0x8c4/0x10e0
       do_set_master+0x312/0x6d0
       do_setlink+0xcf0/0x41c0
       rtnl_newlink+0x149f/0x1c70
       rtnetlink_rcv_msg+0x7cf/0xb70
       netlink_rcv_skb+0x208/0x470
       netlink_unicast+0x82f/0x9e0
       netlink_sendmsg+0x805/0xb30
       __sock_sendmsg+0x21c/0x270
       ____sys_sendmsg+0x505/0x830
       ___sys_sendmsg+0x21f/0x2a0
       __x64_sys_sendmsg+0x19b/0x260
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&qdisc_xmit_lock_key#4);
                               lock(&hsr->seqnr_lock);
                               lock(&qdisc_xmit_lock_key#4);
  lock(&hsr->seqnr_lock);

 *** DEADLOCK ***

7 locks held by syz.2.1865/13529:
 #0: ffffffff8f537c08 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70
 #1: ffffffff8e139f00 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #2: ffff8880435fc258 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#3){+...}-{3:3}, at: __dev_queue_xmit+0x138a/0x3b50
 #3: ffff88802b37e958 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x153/0x4b0
 #4: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ip_output+0x60/0x3c0
 #5: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x452/0x1160
 #6: ffffffff8e139f00 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50

stack backtrace:
CPU: 0 UID: 0 PID: 13529 Comm: syz.2.1865 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
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock_bh+0x36/0x50
 hsr_dev_xmit+0x19a/0x220
 dev_hard_start_xmit+0x2d7/0x830
 __dev_queue_xmit+0x1b8d/0x3b50
 ip_finish_output2+0xd40/0x1160
 ip_output+0x2a1/0x3c0
 iptunnel_xmit+0x592/0xa40
 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_send_learning_packets+0x10d/0x2c0
 bond_alb_handle_active_change+0xa09/0xec0
 bond_change_active_slave+0x1048/0x3770
 bond_select_active_slave+0x8e2/0xd00
 __bond_release_one+0x8c4/0x10e0
 do_set_master+0x312/0x6d0
 do_setlink+0xcf0/0x41c0
 rtnl_newlink+0x149f/0x1c70
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f930a78ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f930b641038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f930a9b5fa0 RCX: 00007f930a78ebe9
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000005
RBP: 00007f930a811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f930a9b6038 R14: 00007f930a9b5fa0 R15: 00007fff52a02518
 </TASK>
bond39: (slave gretap4): Releasing active interface
bond40: (slave ip6gretap6): Releasing active interface
bond40: (slave ip6gretap6): the permanent HWaddr of slave - c2:00:28:e1:c1:a1 - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts
bond40: (slave bridge23): Releasing active interface
bond41: (slave ip6gretap7): Releasing active interface
bond41: (slave ip6gretap7): the permanent HWaddr of slave - 1a:0e:1d:51:5e:7c - is still in use by bond - set the HWaddr of slave to a different address to avoid conflicts
bond41: (slave bridge24): Releasing active interface
syz.2.1865 (13529) used greatest stack depth: 16360 bytes left
