======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
kworker/u8:29/14401 is trying to acquire lock:
ffff888035a59070 (&hsr->seqnr_lock){+.-.}-{3:3}, at: spin_lock_bh include/linux/spinlock.h:353 [inline]
ffff888035a59070 (&hsr->seqnr_lock){+.-.}-{3:3}, at: hsr_dev_xmit+0x237/0x360 net/hsr/hsr_device.c:235

but task is already holding lock:
ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: __netif_tx_lock include/linux/netdevice.h:4840 [inline]
ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0 net/sched/sch_generic.c:370

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}:
       __raw_spin_lock include/linux/spinlock_api_smp.h:190 [inline]
       _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:173
       spin_lock include/linux/spinlock.h:347 [inline]
       __netif_tx_lock include/linux/netdevice.h:4840 [inline]
       sch_direct_xmit+0x15f/0x4c0 net/sched/sch_generic.c:370
       __dev_xmit_skb net/core/dev.c:4262 [inline]
       __dev_queue_xmit+0x177f/0x3820 net/core/dev.c:4884
       dev_queue_xmit include/linux/netdevice.h:3459 [inline]
       hsr_xmit net/hsr/hsr_forward.c:440 [inline]
       hsr_forward_do net/hsr/hsr_forward.c:603 [inline]
       hsr_forward_skb+0x1701/0x2b70 net/hsr/hsr_forward.c:777
       send_hsr_supervision_frame+0x733/0xcf0 net/hsr/hsr_device.c:364
       hsr_announce+0x1db/0x370 net/hsr/hsr_device.c:448
       call_timer_fn+0x18d/0x5f0 kernel/time/timer.c:1748
       expire_timers kernel/time/timer.c:1799 [inline]
       __run_timers kernel/time/timer.c:2374 [inline]
       __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
       run_timer_base kernel/time/timer.c:2395 [inline]
       run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
       handle_softirqs+0x226/0x860 kernel/softirq.c:645
       __do_softirq kernel/softirq.c:679 [inline]
       invoke_softirq kernel/softirq.c:519 [inline]
       __irq_exit_rcu+0xcb/0x220 kernel/softirq.c:758
       irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
       instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
       sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
       asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
       mas_store_root lib/maple_tree.c:2856 [inline]
       mas_wr_store_entry+0x7527/0x7cf0 lib/maple_tree.c:3621
       mas_store_gfp+0x4ca/0x830 lib/maple_tree.c:4999
       vms_gather_munmap_vmas+0x68a/0x1370 mm/vma.c:1534
       __mmap_setup mm/vma.c:2546 [inline]
       __mmap_region mm/vma.c:2869 [inline]
       mmap_region+0x928/0x2270 mm/vma.c:2974
       do_mmap+0xe0a/0x1300 mm/mmap.c:573
       vm_mmap_pgoff+0x272/0x4e0 mm/util.c:581
       ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:619
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&hsr->seqnr_lock){+.-.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3209 [inline]
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
       __raw_spin_lock_bh include/linux/spinlock_api_smp.h:182 [inline]
       _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:205
       spin_lock_bh include/linux/spinlock.h:353 [inline]
       hsr_dev_xmit+0x237/0x360 net/hsr/hsr_device.c:235
       __netdev_start_xmit include/linux/netdevice.h:5431 [inline]
       netdev_start_xmit include/linux/netdevice.h:5440 [inline]
       xmit_one net/core/dev.c:3937 [inline]
       dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3953
       __dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4926
       NF_HOOK+0x33a/0x3c0 include/linux/netfilter.h:-1
       arp_xmit+0x16c/0x270 net/ipv4/arp.c:668
       arp_solicit+0xbdc/0xe40 net/ipv4/arp.c:395
       neigh_probe net/core/neighbour.c:1087 [inline]
       __neigh_event_send+0xf0c/0x1510 net/core/neighbour.c:1267
       neigh_event_send_probe include/net/neighbour.h:474 [inline]
       neigh_event_send include/net/neighbour.h:480 [inline]
       neigh_resolve_output+0x1a1/0x720 net/core/neighbour.c:1604
       neigh_output include/net/neighbour.h:554 [inline]
       ip_finish_output2+0xc4b/0x10b0 net/ipv4/ip_output.c:236
       NF_HOOK_COND include/linux/netfilter.h:314 [inline]
       ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
       iptunnel_xmit+0x626/0xd10 net/ipv4/ip_tunnel_core.c:97
       ip_tunnel_xmit+0x195b/0x2040 net/ipv4/ip_tunnel.c:852
       erspan_xmit+0xb6a/0x1620 net/ipv4/ip_gre.c:752
       __netdev_start_xmit include/linux/netdevice.h:5431 [inline]
       netdev_start_xmit include/linux/netdevice.h:5440 [inline]
       xmit_one net/core/dev.c:3937 [inline]
       dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3953
       sch_direct_xmit+0x257/0x4c0 net/sched/sch_generic.c:372
       __dev_xmit_skb net/core/dev.c:4262 [inline]
       __dev_queue_xmit+0x177f/0x3820 net/core/dev.c:4884
       dev_queue_xmit include/linux/netdevice.h:3459 [inline]
       alb_send_lp_vid+0x348/0x550 drivers/net/bonding/bond_alb.c:968
       alb_send_learning_packets+0x12c/0x300 drivers/net/bonding/bond_alb.c:1031
       bond_alb_monitor+0x3da/0x1840 drivers/net/bonding/bond_alb.c:1611
       process_one_work kernel/workqueue.c:3396 [inline]
       process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
       worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
       kthread+0x38b/0x480 kernel/kthread.c:436
       ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

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 ***

locks held by kworker/u8:29/14401: 11, last CPU#0:
 #0: ffff888034233940 ((wq_completion)bond13){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff888034233940 ((wq_completion)bond13){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff888034233940 ((wq_completion)bond13){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline]
 #0: ffff888034233940 ((wq_completion)bond13){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479
 #1: ffffc9000e127c40 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffc9000e127c40 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffc9000e127c40 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline]
 #1: ffffc9000e127c40 ((work_completion)(&(&bond->alb_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479
 #2: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #2: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #2: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: bond_alb_monitor+0xf0/0x1840 drivers/net/bonding/bond_alb.c:1594
 #3: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
 #3: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:902 [inline]
 #3: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x29b/0x3820 net/core/dev.c:4844
 #4: ffff8880368bb228 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: spin_trylock include/linux/spinlock.h:359 [inline]
 #4: ffff8880368bb228 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: qdisc_run_begin include/net/sch_generic.h:206 [inline]
 #4: ffff8880368bb228 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: __dev_xmit_skb net/core/dev.c:4249 [inline]
 #4: ffff8880368bb228 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock#5){+...}-{3:3}, at: __dev_queue_xmit+0x1143/0x3820 net/core/dev.c:4884
 #5: ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline]
 #5: ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: __netif_tx_lock include/linux/netdevice.h:4840 [inline]
 #5: ffff888050524558 (&qdisc_xmit_lock_key#4){+.-.}-{3:3}, at: sch_direct_xmit+0x15f/0x4c0 net/sched/sch_generic.c:370
 #6: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #6: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #6: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5a/0x450 net/ipv4/ip_output.c:432
 #7: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #7: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #7: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x3de/0x10b0 net/ipv4/ip_output.c:229
 #8: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #8: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #8: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: arp_xmit+0x23/0x270 net/ipv4/arp.c:666
 #9: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
 #9: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:902 [inline]
 #9: ffffffff8ed5c980 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x29b/0x3820 net/core/dev.c:4844
 #10: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #10: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #10: ffffffff8ed5c920 (rcu_read_lock){....}-{1:3}, at: hsr_dev_xmit+0x2d/0x360 net/hsr/hsr_device.c:229

stack backtrace:
CPU: 0 UID: 0 PID: 14401 Comm: kworker/u8:29 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: bond13 bond_alb_monitor
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219
 check_prev_add kernel/locking/lockdep.c:3209 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:182 [inline]
 _raw_spin_lock_bh+0x36/0x50 kernel/locking/spinlock.c:205
 spin_lock_bh include/linux/spinlock.h:353 [inline]
 hsr_dev_xmit+0x237/0x360 net/hsr/hsr_device.c:235
 __netdev_start_xmit include/linux/netdevice.h:5431 [inline]
 netdev_start_xmit include/linux/netdevice.h:5440 [inline]
 xmit_one net/core/dev.c:3937 [inline]
 dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3953
 __dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4926
 NF_HOOK+0x33a/0x3c0 include/linux/netfilter.h:-1
 arp_xmit+0x16c/0x270 net/ipv4/arp.c:668
 arp_solicit+0xbdc/0xe40 net/ipv4/arp.c:395
 neigh_probe net/core/neighbour.c:1087 [inline]
 __neigh_event_send+0xf0c/0x1510 net/core/neighbour.c:1267
 neigh_event_send_probe include/net/neighbour.h:474 [inline]
 neigh_event_send include/net/neighbour.h:480 [inline]
 neigh_resolve_output+0x1a1/0x720 net/core/neighbour.c:1604
 neigh_output include/net/neighbour.h:554 [inline]
 ip_finish_output2+0xc4b/0x10b0 net/ipv4/ip_output.c:236
 NF_HOOK_COND include/linux/netfilter.h:314 [inline]
 ip_output+0x29f/0x450 net/ipv4/ip_output.c:437
 iptunnel_xmit+0x626/0xd10 net/ipv4/ip_tunnel_core.c:97
 ip_tunnel_xmit+0x195b/0x2040 net/ipv4/ip_tunnel.c:852
 erspan_xmit+0xb6a/0x1620 net/ipv4/ip_gre.c:752
 __netdev_start_xmit include/linux/netdevice.h:5431 [inline]
 netdev_start_xmit include/linux/netdevice.h:5440 [inline]
 xmit_one net/core/dev.c:3937 [inline]
 dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3953
 sch_direct_xmit+0x257/0x4c0 net/sched/sch_generic.c:372
 __dev_xmit_skb net/core/dev.c:4262 [inline]
 __dev_queue_xmit+0x177f/0x3820 net/core/dev.c:4884
 dev_queue_xmit include/linux/netdevice.h:3459 [inline]
 alb_send_lp_vid+0x348/0x550 drivers/net/bonding/bond_alb.c:968
 alb_send_learning_packets+0x12c/0x300 drivers/net/bonding/bond_alb.c:1031
 bond_alb_monitor+0x3da/0x1840 drivers/net/bonding/bond_alb.c:1611
 process_one_work kernel/workqueue.c:3396 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>