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possible deadlock in sch_direct_xmit (2)

Status: auto-closed as invalid on 2020/03/15 19:58
Reported-by: syzbot+fdad8205fa161e56cfa9@syzkaller.appspotmail.com
First crash: 1831d, last: 1831d
▶ ▼ Similar bugs (12)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in sch_direct_xmit (2) origin:lts-only C done 19 3d05h 316d 0/3 upstream: reported C repro on 2024/01/09 18:28
android-44 possible deadlock in sch_direct_xmit C 240 1814d 2051d 0/2 public: reported C repro on 2019/04/11 08:44
upstream possible deadlock in sch_direct_xmit (2) net C done unreliable 109 493d 1667d 0/28 auto-obsoleted due to no activity on 2024/01/14 06:05
linux-4.19 possible deadlock in sch_direct_xmit (2) C error 15 635d 1152d 0/1 upstream: reported C repro on 2021/09/26 01:30
upstream possible deadlock in sch_direct_xmit net C done done 1548 1822d 2500d 15/28 fixed on 2020/04/17 19:57
linux-5.15 possible deadlock in sch_direct_xmit (2) origin:lts-only C error 13 24d 272d 0/3 upstream: reported C repro on 2024/02/22 19:25
linux-4.14 possible deadlock in sch_direct_xmit 1 1998d 1998d 0/1 auto-closed as invalid on 2019/10/25 08:40
upstream possible deadlock in sch_direct_xmit (4) net 1 207d 207d 25/28 fixed on 2024/06/05 13:52
linux-4.19 possible deadlock in sch_direct_xmit 1 1999d 1999d 0/1 auto-closed as invalid on 2019/10/25 08:50
linux-5.15 possible deadlock in sch_direct_xmit 1 560d 560d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:09
linux-6.1 possible deadlock in sch_direct_xmit 2 567d 606d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:10
upstream possible deadlock in sch_direct_xmit (3) net 1 283d 283d 25/28 fixed on 2024/04/10 16:40

Sample crash report:
======================================================
WARNING: possible circular locking dependency detected
4.14.154 #0 Not tainted
------------------------------------------------------
syz-executor.3/11891 is trying to acquire lock:
 (_xmit_TUNNEL6#2){+.-.}, at: [<ffffffff84e3cb5c>] spin_lock include/linux/spinlock.h:317 [inline]
 (_xmit_TUNNEL6#2){+.-.}, at: [<ffffffff84e3cb5c>] __netif_tx_lock include/linux/netdevice.h:3530 [inline]
 (_xmit_TUNNEL6#2){+.-.}, at: [<ffffffff84e3cb5c>] sch_direct_xmit+0x1fc/0x550 net/sched/sch_generic.c:184

but task is already holding lock:
 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] spin_lock include/linux/spinlock.h:317 [inline]
 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] __dev_xmit_skb net/core/dev.c:3202 [inline]
 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] __dev_queue_xmit+0x1f0f/0x25e0 net/core/dev.c:3493

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}:
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
       __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
       _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152
       spin_lock include/linux/spinlock.h:317 [inline]
       __dev_xmit_skb net/core/dev.c:3202 [inline]
       __dev_queue_xmit+0x1f0f/0x25e0 net/core/dev.c:3493
       dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
       neigh_hh_output include/net/neighbour.h:490 [inline]
       neigh_output include/net/neighbour.h:498 [inline]
       ip_finish_output2+0xddc/0x14a0 net/ipv4/ip_output.c:229
       ip_finish_output+0x56d/0xc60 net/ipv4/ip_output.c:317
       NF_HOOK_COND include/linux/netfilter.h:239 [inline]
       ip_output+0x1e6/0x590 net/ipv4/ip_output.c:405
       dst_output include/net/dst.h:462 [inline]
       ip_local_out+0x97/0x170 net/ipv4/ip_output.c:124
       ip_send_skb+0x3e/0xc0 net/ipv4/ip_output.c:1418
       ip_push_pending_frames+0x64/0x80 net/ipv4/ip_output.c:1438
       icmp_push_reply+0x38f/0x500 net/ipv4/icmp.c:394
       __icmp_send+0x973/0x11f0 net/ipv4/icmp.c:742
       ipv4_send_dest_unreach net/ipv4/route.c:1221 [inline]
       ipv4_link_failure+0x432/0x7c0 net/ipv4/route.c:1228
       dst_link_failure include/net/dst.h:445 [inline]
       vti6_xmit net/ipv6/ip6_vti.c:522 [inline]
       vti6_tnl_xmit+0x645/0x18a0 net/ipv6/ip6_vti.c:561
       __netdev_start_xmit include/linux/netdevice.h:4033 [inline]
       netdev_start_xmit include/linux/netdevice.h:4042 [inline]
       xmit_one net/core/dev.c:3009 [inline]
       dev_hard_start_xmit+0x18c/0x8b0 net/core/dev.c:3025
       __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525
       dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
       neigh_direct_output+0x16/0x20 net/core/neighbour.c:1404
       neigh_output include/net/neighbour.h:500 [inline]
       ip_finish_output2+0x766/0x14a0 net/ipv4/ip_output.c:229
       ip_finish_output+0x56d/0xc60 net/ipv4/ip_output.c:317
       NF_HOOK_COND include/linux/netfilter.h:239 [inline]
       ip_output+0x1e6/0x590 net/ipv4/ip_output.c:405
       dst_output include/net/dst.h:462 [inline]
       ip_local_out+0x97/0x170 net/ipv4/ip_output.c:124
       ip_queue_xmit+0x7d7/0x1b10 net/ipv4/ip_output.c:504
       __tcp_transmit_skb+0x172c/0x2fe0 net/ipv4/tcp_output.c:1130
       tcp_transmit_skb net/ipv4/tcp_output.c:1146 [inline]
       __tcp_retransmit_skb+0x536/0x1bb0 net/ipv4/tcp_output.c:2929
       tcp_retransmit_skb+0x2e/0x230 net/ipv4/tcp_output.c:2943
       tcp_retransmit_timer+0x81c/0x2560 net/ipv4/tcp_timer.c:494
       tcp_write_timer_handler+0x479/0x7e0 net/ipv4/tcp_timer.c:579
       tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597
       call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
       expire_timers kernel/time/timer.c:1318 [inline]
       __run_timers kernel/time/timer.c:1636 [inline]
       __run_timers kernel/time/timer.c:1604 [inline]
       run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
       __do_softirq+0x244/0x9a0 kernel/softirq.c:288
       invoke_softirq kernel/softirq.c:368 [inline]
       irq_exit+0x160/0x1b0 kernel/softirq.c:409
       exiting_irq arch/x86/include/asm/apic.h:648 [inline]
       smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
       apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
       __read_once_size include/linux/compiler.h:183 [inline]
       __sanitizer_cov_trace_pc+0x41/0x60 kernel/kcov.c:87
       page_copy_sane lib/iov_iter.c:700 [inline]
       copy_page_from_iter+0x30/0x720 lib/iov_iter.c:732
       pipe_write+0x25a/0xe40 fs/pipe.c:448
       call_write_iter include/linux/fs.h:1777 [inline]
       new_sync_write fs/read_write.c:469 [inline]
       __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
       vfs_write+0x198/0x500 fs/read_write.c:544
       SYSC_write fs/read_write.c:590 [inline]
       SyS_write+0xfd/0x230 fs/read_write.c:582
       do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x42/0xb7

-> #0 (_xmit_TUNNEL6#2){+.-.}:
       check_prev_add kernel/locking/lockdep.c:1901 [inline]
       check_prevs_add kernel/locking/lockdep.c:2018 [inline]
       validate_chain kernel/locking/lockdep.c:2460 [inline]
       __lock_acquire+0x2cb3/0x4620 kernel/locking/lockdep.c:3487
       lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
       __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
       _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152
       spin_lock include/linux/spinlock.h:317 [inline]
       __netif_tx_lock include/linux/netdevice.h:3530 [inline]
       sch_direct_xmit+0x1fc/0x550 net/sched/sch_generic.c:184
       __dev_xmit_skb net/core/dev.c:3218 [inline]
       __dev_queue_xmit+0x1b6e/0x25e0 net/core/dev.c:3493
       dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
       neigh_direct_output+0x16/0x20 net/core/neighbour.c:1404
       neigh_output include/net/neighbour.h:500 [inline]
       ip_finish_output2+0x766/0x14a0 net/ipv4/ip_output.c:229
       ip_finish_output+0x56d/0xc60 net/ipv4/ip_output.c:317
       NF_HOOK_COND include/linux/netfilter.h:239 [inline]
       ip_output+0x1e6/0x590 net/ipv4/ip_output.c:405
       dst_output include/net/dst.h:462 [inline]
       ip_local_out+0x97/0x170 net/ipv4/ip_output.c:124
       ip_queue_xmit+0x7d7/0x1b10 net/ipv4/ip_output.c:504
       __tcp_transmit_skb+0x172c/0x2fe0 net/ipv4/tcp_output.c:1130
       tcp_transmit_skb net/ipv4/tcp_output.c:1146 [inline]
       __tcp_retransmit_skb+0x536/0x1bb0 net/ipv4/tcp_output.c:2929
       tcp_retransmit_skb+0x2e/0x230 net/ipv4/tcp_output.c:2943
       tcp_retransmit_timer+0x81c/0x2560 net/ipv4/tcp_timer.c:494
       tcp_write_timer_handler+0x479/0x7e0 net/ipv4/tcp_timer.c:579
       tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597
       call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
       expire_timers kernel/time/timer.c:1318 [inline]
       __run_timers kernel/time/timer.c:1636 [inline]
       __run_timers kernel/time/timer.c:1604 [inline]
       run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
       __do_softirq+0x244/0x9a0 kernel/softirq.c:288
       invoke_softirq kernel/softirq.c:368 [inline]
       irq_exit+0x160/0x1b0 kernel/softirq.c:409
       exiting_irq arch/x86/include/asm/apic.h:648 [inline]
       smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
       apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
       arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
       __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
       _raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:192
       spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
       __wake_up_common_lock+0xe3/0x160 kernel/sched/wait.c:126
       __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:203
       pipe_write+0x915/0xe40 fs/pipe.c:485
       call_write_iter include/linux/fs.h:1777 [inline]
       new_sync_write fs/read_write.c:469 [inline]
       __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
       vfs_write+0x198/0x500 fs/read_write.c:544
       SYSC_write fs/read_write.c:590 [inline]
       SyS_write+0xfd/0x230 fs/read_write.c:582
       do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x42/0xb7

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
                               lock(_xmit_TUNNEL6#2);
                               lock(dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
  lock(_xmit_TUNNEL6#2);

 *** DEADLOCK ***

8 locks held by syz-executor.3/11891:
 #0:  (&pipe->mutex/1){+.+.}, at: [<ffffffff818f9371>] pipe_lock_nested fs/pipe.c:67 [inline]
 #0:  (&pipe->mutex/1){+.+.}, at: [<ffffffff818f9371>] pipe_lock fs/pipe.c:75 [inline]
 #0:  (&pipe->mutex/1){+.+.}, at: [<ffffffff818f9371>] pipe_wait+0x181/0x1a0 fs/pipe.c:123
 #1:  (((&icsk->icsk_retransmit_timer))){+.-.}, at: [<ffffffff814fe138>] lockdep_copy_map include/linux/lockdep.h:174 [inline]
 #1:  (((&icsk->icsk_retransmit_timer))){+.-.}, at: [<ffffffff814fe138>] call_timer_fn+0xc8/0x670 kernel/time/timer.c:1269
 #2:  (slock-AF_INET){+.-.}, at: [<ffffffff852a1342>] spin_lock include/linux/spinlock.h:317 [inline]
 #2:  (slock-AF_INET){+.-.}, at: [<ffffffff852a1342>] tcp_write_timer+0x22/0x180 net/ipv4/tcp_timer.c:595
 #3:  (rcu_read_lock){....}, at: [<ffffffff8521f060>] sock_net include/net/sock.h:2333 [inline]
 #3:  (rcu_read_lock){....}, at: [<ffffffff8521f060>] ip_queue_xmit+0x40/0x1b10 net/ipv4/ip_output.c:429
 #4:  (rcu_read_lock_bh){....}, at: [<ffffffff852199d6>] lwtunnel_xmit_redirect include/net/lwtunnel.h:92 [inline]
 #4:  (rcu_read_lock_bh){....}, at: [<ffffffff852199d6>] ip_finish_output2+0x256/0x14a0 net/ipv4/ip_output.c:213
 #5:  (rcu_read_lock_bh){....}, at: [<ffffffff84d5dd22>] __dev_queue_xmit+0x1e2/0x25e0 net/core/dev.c:3459
 #6:  (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] spin_lock include/linux/spinlock.h:317 [inline]
 #6:  (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] __dev_xmit_skb net/core/dev.c:3202 [inline]
 #6:  (dev->qdisc_tx_busylock ?: &qdisc_tx_busylock){+.-.}, at: [<ffffffff84d5fa4f>] __dev_queue_xmit+0x1f0f/0x25e0 net/core/dev.c:3493
 #7:  (dev->qdisc_running_key ?: &qdisc_running_key){+...}, at: [<ffffffff84d60138>] dev_queue_xmit+0x18/0x20 net/core/dev.c:3558

stack backtrace:
CPU: 1 PID: 11891 Comm: syz-executor.3 Not tainted 4.14.154 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x142/0x197 lib/dump_stack.c:58
 print_circular_bug.isra.0.cold+0x1cc/0x28f kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1901 [inline]
 check_prevs_add kernel/locking/lockdep.c:2018 [inline]
 validate_chain kernel/locking/lockdep.c:2460 [inline]
 __lock_acquire+0x2cb3/0x4620 kernel/locking/lockdep.c:3487
 lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:152
 spin_lock include/linux/spinlock.h:317 [inline]
 __netif_tx_lock include/linux/netdevice.h:3530 [inline]
 sch_direct_xmit+0x1fc/0x550 net/sched/sch_generic.c:184
 __dev_xmit_skb net/core/dev.c:3218 [inline]
 __dev_queue_xmit+0x1b6e/0x25e0 net/core/dev.c:3493
 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558
 neigh_direct_output+0x16/0x20 net/core/neighbour.c:1404
 neigh_output include/net/neighbour.h:500 [inline]
 ip_finish_output2+0x766/0x14a0 net/ipv4/ip_output.c:229
 ip_finish_output+0x56d/0xc60 net/ipv4/ip_output.c:317
 NF_HOOK_COND include/linux/netfilter.h:239 [inline]
 ip_output+0x1e6/0x590 net/ipv4/ip_output.c:405
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
 dst_output include/net/dst.h:462 [inline]
 ip_local_out+0x97/0x170 net/ipv4/ip_output.c:124
 ip_queue_xmit+0x7d7/0x1b10 net/ipv4/ip_output.c:504
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
 __tcp_transmit_skb+0x172c/0x2fe0 net/ipv4/tcp_output.c:1130
 tcp_transmit_skb net/ipv4/tcp_output.c:1146 [inline]
 __tcp_retransmit_skb+0x536/0x1bb0 net/ipv4/tcp_output.c:2929
 tcp_retransmit_skb+0x2e/0x230 net/ipv4/tcp_output.c:2943
 tcp_retransmit_timer+0x81c/0x2560 net/ipv4/tcp_timer.c:494
 tcp_write_timer_handler+0x479/0x7e0 net/ipv4/tcp_timer.c:579
 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597
 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279
 expire_timers kernel/time/timer.c:1318 [inline]
 __run_timers kernel/time/timer.c:1636 [inline]
 __run_timers kernel/time/timer.c:1604 [inline]
 run_timer_softirq+0x5b7/0x1520 kernel/time/timer.c:1649
 __do_softirq+0x244/0x9a0 kernel/softirq.c:288
 invoke_softirq kernel/softirq.c:368 [inline]
 irq_exit+0x160/0x1b0 kernel/softirq.c:409
 exiting_irq arch/x86/include/asm/apic.h:648 [inline]
 smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1102
 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:779 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:192
RSP: 0018:ffff8881b188fb50 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff0ee2d21 RBX: 0000000000000282 RCX: 1ffff110130a91bc
RDX: dffffc0000000000 RSI: ffff888098548dc0 RDI: 0000000000000282
RBP: ffff8881b188fb60 R08: ffff888098548540 R09: ffff888098548de0
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a94a7ac0
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000041
 spin_unlock_irqrestore include/linux/spinlock.h:372 [inline]
 __wake_up_common_lock+0xe3/0x160 kernel/sched/wait.c:126
 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:203
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
 pipe_write+0x915/0xe40 fs/pipe.c:485
 call_write_iter include/linux/fs.h:1777 [inline]
 new_sync_write fs/read_write.c:469 [inline]
 __vfs_write+0x4a7/0x6b0 fs/read_write.c:482
 vfs_write+0x198/0x500 fs/read_write.c:544
 SYSC_write fs/read_write.c:590 [inline]
 SyS_write+0xfd/0x230 fs/read_write.c:582
 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45a669
RSP: 002b:00007fd97acaac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a669
RDX: 0000000041395527 RSI: 0000000020000340 RDI: 0000000000000006
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd97acab6d4
R13: 00000000004c7160 R14: 00000000004e26b8 R15: 00000000ffffffff
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
net_ratelimit: 25 callbacks suppressed
TCP: out of memory -- consider tuning tcp_mem
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
TCP: out of memory -- consider tuning tcp_mem
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
TCP: out of memory -- consider tuning tcp_mem
TCP: out of memory -- consider tuning tcp_mem
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
net_ratelimit: 23 callbacks suppressed
protocol 88fb is buggy, dev hsr_slave_0
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
protocol 88fb is buggy, dev hsr_slave_0
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
protocol 88fb is buggy, dev hsr_slave_1
protocol 88fb is buggy, dev hsr_slave_0
protocol 88fb is buggy, dev hsr_slave_1
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
TCP: out of memory -- consider tuning tcp_mem
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop5' (ffff8880a4b422e0): kobject_uevent_env
kobject: 'loop5' (ffff8880a4b422e0): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop2' (ffff8880a4a572a0): kobject_uevent_env
kobject: 'loop2' (ffff8880a4a572a0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop3' (ffff8880a4ad21e0): kobject_uevent_env
kobject: 'loop3' (ffff8880a4ad21e0): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop0' (ffff88805cea2f60): kobject_uevent_env
kobject: 'loop0' (ffff88805cea2f60): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (ffff8880a4a049a0): kobject_uevent_env
kobject: 'loop1' (ffff8880a4a049a0): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop4' (ffff8880a4b0a260): kobject_uevent_env
kobject: 'loop4' (ffff8880a4b0a260): fill_kobj_path: path = '/devices/virtual/block/loop4'

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/11/16 19:58 linux-4.14.y 775d01b65b5d cdac920b .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.