[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 52.687726][ T26] audit: type=1800 audit(1567950056.947:25): pid=8404 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 52.729138][ T26] audit: type=1800 audit(1567950056.957:26): pid=8404 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 52.767995][ T26] audit: type=1800 audit(1567950056.957:27): pid=8404 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. syzkaller login: [ 271.332387][ T8558] IPVS: ftp: loaded support on port[0] = 21 [ 271.394115][ T8558] chnl_net:caif_netlink_parms(): no params data found [ 271.422308][ T8558] bridge0: port 1(bridge_slave_0) entered blocking state [ 271.429523][ T8558] bridge0: port 1(bridge_slave_0) entered disabled state [ 271.437355][ T8558] device bridge_slave_0 entered promiscuous mode [ 271.445879][ T8558] bridge0: port 2(bridge_slave_1) entered blocking state [ 271.453251][ T8558] bridge0: port 2(bridge_slave_1) entered disabled state [ 271.461324][ T8558] device bridge_slave_1 entered promiscuous mode [ 271.477164][ T8558] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 271.487843][ T8558] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 271.506218][ T8558] team0: Port device team_slave_0 added [ 271.513482][ T8558] team0: Port device team_slave_1 added [ 271.561591][ T8558] device hsr_slave_0 entered promiscuous mode [ 271.599417][ T8558] device hsr_slave_1 entered promiscuous mode [ 271.646432][ T8558] bridge0: port 2(bridge_slave_1) entered blocking state [ 271.653606][ T8558] bridge0: port 2(bridge_slave_1) entered forwarding state [ 271.661397][ T8558] bridge0: port 1(bridge_slave_0) entered blocking state [ 271.668557][ T8558] bridge0: port 1(bridge_slave_0) entered forwarding state [ 271.701927][ T8558] 8021q: adding VLAN 0 to HW filter on device bond0 [ 271.712931][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 271.733707][ T2997] bridge0: port 1(bridge_slave_0) entered disabled state [ 271.741546][ T2997] bridge0: port 2(bridge_slave_1) entered disabled state [ 271.749717][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 271.761533][ T8558] 8021q: adding VLAN 0 to HW filter on device team0 [ 271.771147][ T2997] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 271.780193][ T2997] bridge0: port 1(bridge_slave_0) entered blocking state [ 271.787240][ T2997] bridge0: port 1(bridge_slave_0) entered forwarding state [ 271.797894][ T8560] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 271.806850][ T8560] bridge0: port 2(bridge_slave_1) entered blocking state [ 271.813949][ T8560] bridge0: port 2(bridge_slave_1) entered forwarding state [ 271.832443][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 271.840892][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 271.854553][ T8558] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 271.865489][ T8558] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 271.877547][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 271.885772][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 271.894245][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 271.902436][ T8561] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 271.920024][ T8558] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 377.068973][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 377.075969][ C0] (detected by 0, t=10502 jiffies, g=6685, q=45) [ 377.082464][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294974859-4294964356), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 377.096178][ C0] kworker/0:1 R running task 26728 12 2 0x80004008 [ 377.104160][ C0] Workqueue: events iterate_cleanup_work [ 377.109780][ C0] Call Trace: [ 377.113055][ C0] [ 377.115905][ C0] sched_show_task.cold+0x2ed/0x34e [ 377.121102][ C0] rcu_sched_clock_irq.cold+0xafc/0xc12 [ 377.126652][ C0] update_process_times+0x2d/0x70 [ 377.131674][ C0] tick_sched_handle+0xa2/0x190 [ 377.136520][ C0] tick_sched_timer+0x53/0x140 [ 377.141280][ C0] __hrtimer_run_queues+0x364/0xe40 [ 377.146473][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 377.151754][ C0] ? hrtimer_sleeper_start_expires+0x90/0x90 [ 377.157724][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 377.163434][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 377.169516][ C0] hrtimer_interrupt+0x314/0x770 [ 377.174498][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 377.180043][ C0] apic_timer_interrupt+0xf/0x20 [ 377.184980][ C0] RIP: 0010:native_queued_spin_lock_slowpath+0x132/0x9f0 [ 377.192000][ C0] Code: 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 37 07 00 00 48 81 c4 98 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 f3 90 73 ff ff ff 8b 45 98 4c 8d 65 d8 3d 00 01 00 00 0f 84 e5 00 00 [ 377.211599][ C0] RSP: 0018:ffff8880ae808fa0 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 [ 377.220007][ C0] RAX: 0000000000000000 RBX: ffff8880a1e8f8e8 RCX: ffffffff815924c7 [ 377.227977][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a1e8f8e8 [ 377.235938][ C0] RBP: ffff8880ae809060 R08: 1ffff110143d1f1d R09: ffffed10143d1f1e [ 377.243898][ C0] R10: ffffed10143d1f1d R11: ffff8880a1e8f8eb R12: 0000000000000001 [ 377.251857][ C0] R13: 0000000000000003 R14: ffffed10143d1f1d R15: 0000000000000001 [ 377.259823][ C0] ? apic_timer_interrupt+0xa/0x20 [ 377.264933][ C0] ? native_queued_spin_lock_slowpath+0xb7/0x9f0 [ 377.271283][ C0] ? __pv_queued_spin_lock_slowpath+0xd10/0xd10 [ 377.277517][ C0] ? mark_held_locks+0xf0/0xf0 [ 377.282276][ C0] do_raw_spin_lock+0x20e/0x2e0 [ 377.287117][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 377.292041][ C0] ? lock_acquire+0x190/0x410 [ 377.296738][ C0] ? __dev_queue_xmit+0x14b8/0x37c0 [ 377.301978][ C0] _raw_spin_lock+0x37/0x40 [ 377.306480][ C0] ? __dev_queue_xmit+0x14b8/0x37c0 [ 377.311671][ C0] __dev_queue_xmit+0x14b8/0x37c0 [ 377.316692][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 377.322846][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 377.328129][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 377.334421][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 377.339737][ C0] ? br_forward_finish+0x235/0x400 [ 377.344853][ C0] ? find_held_lock+0x35/0x130 [ 377.349611][ C0] ? br_forward_finish+0x235/0x400 [ 377.354721][ C0] dev_queue_xmit+0x18/0x20 [ 377.359219][ C0] ? dev_queue_xmit+0x18/0x20 [ 377.363889][ C0] br_dev_queue_push_xmit+0x3f3/0x5e0 [ 377.369250][ C0] ? __kasan_check_read+0x11/0x20 [ 377.374271][ C0] br_forward_finish+0xfa/0x400 [ 377.379116][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 377.384658][ C0] ? br_fdb_add.cold+0x83/0x83 [ 377.389415][ C0] ? __kasan_check_read+0x11/0x20 [ 377.394435][ C0] __br_forward+0x641/0xb00 [ 377.398937][ C0] ? br_forward_finish+0x400/0x400 [ 377.404047][ C0] ? br_dev_queue_push_xmit+0x5e0/0x5e0 [ 377.409593][ C0] deliver_clone+0x61/0xc0 [ 377.414008][ C0] maybe_deliver+0x2c7/0x390 [ 377.418591][ C0] br_flood+0x13a/0x3d0 [ 377.422752][ C0] br_dev_xmit+0x98c/0x15a0 [ 377.427253][ C0] ? br_poll_controller+0x10/0x10 [ 377.432272][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 377.438418][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 377.443955][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 377.449933][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 377.456168][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 377.461272][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 377.467505][ C0] __dev_queue_xmit+0x2b82/0x37c0 [ 377.472519][ C0] ? __kasan_check_read+0x11/0x20 [ 377.477536][ C0] ? __lock_acquire+0x293a/0x4a00 [ 377.482554][ C0] ? __lock_acquire+0x8a0/0x4a00 [ 377.487489][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 377.492766][ C0] ? __kasan_check_read+0x11/0x20 [ 377.497779][ C0] ? mark_lock+0xc2/0x1220 [ 377.502191][ C0] ? mark_held_locks+0xa4/0xf0 [ 377.507005][ C0] ? ip_finish_output2+0x140e/0x2590 [ 377.512282][ C0] ? __ip_finish_output+0x5fc/0xbc0 [ 377.517468][ C0] ? ip_finish_output2+0x140e/0x2590 [ 377.522748][ C0] dev_queue_xmit+0x18/0x20 [ 377.527240][ C0] ? dev_queue_xmit+0x18/0x20 [ 377.531908][ C0] ip_finish_output2+0x1752/0x2590 [ 377.537074][ C0] ? nf_ct_deliver_cached_events+0x23d/0x6e0 [ 377.543054][ C0] ? ip_frag_next+0x910/0x910 [ 377.547731][ C0] __ip_finish_output+0x5fc/0xbc0 [ 377.552747][ C0] ? __ip_finish_output+0x5fc/0xbc0 [ 377.557934][ C0] ? alloc_chunk+0x120/0x220 [ 377.562521][ C0] ip_finish_output+0x38/0x1f0 [ 377.567281][ C0] ip_output+0x21f/0x670 [ 377.571517][ C0] ? ip_mc_output+0xf70/0xf70 [ 377.576191][ C0] ? __ip_finish_output+0xbc0/0xbc0 [ 377.581390][ C0] ip_local_out+0xbb/0x1b0 [ 377.585828][ C0] igmpv3_sendpack+0x1b5/0x2e0 [ 377.590589][ C0] igmp_ifc_timer_expire+0x687/0xa00 [ 377.595875][ C0] call_timer_fn+0x1ac/0x780 [ 377.600454][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 377.605557][ C0] ? msleep_interruptible+0x150/0x150 [ 377.610919][ C0] ? run_timer_softirq+0x6ae/0x17f0 [ 377.616110][ C0] ? trace_hardirqs_on+0x67/0x240 [ 377.621125][ C0] ? __kasan_check_read+0x11/0x20 [ 377.626137][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 377.631237][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 377.636336][ C0] run_timer_softirq+0x6c0/0x17f0 [ 377.641356][ C0] ? add_timer+0x930/0x930 [ 377.645763][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 377.651944][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 377.657479][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 377.663450][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 377.669682][ C0] __do_softirq+0x262/0x98c [ 377.674181][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 377.679034][ C0] irq_exit+0x19b/0x1e0 [ 377.683181][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 377.688721][ C0] apic_timer_interrupt+0xf/0x20 [ 377.693641][ C0] [ 377.696573][ C0] RIP: 0010:__local_bh_enable_ip+0x18e/0x270 [ 377.702546][ C0] Code: 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 df 00 00 00 48 83 3d ff ac ad 07 00 0f 84 8f 00 00 00 fb 66 0f 1f 44 00 00 <65> 8b 05 43 bd bc 7e 85 c0 74 7f 5b 41 5c 41 5d 5d c3 80 3d ef 58 [ 377.722144][ C0] RSP: 0018:ffff8880a98cfbb0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 377.730557][ C0] RAX: 1ffffffff11e5db6 RBX: 0000000000000200 RCX: 0000000000000006 [ 377.738515][ C0] RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff8880a98bcb9c [ 377.746475][ C0] RBP: ffff8880a98cfbc8 R08: 1ffffffff14ed342 R09: fffffbfff14ed343 [ 377.754438][ C0] R10: fffffbfff14ed342 R11: ffffffff8a769a17 R12: ffffffff85d70311 [ 377.762402][ C0] R13: ffff8880a98bc300 R14: 0000000000000001 R15: dffffc0000000000 [ 377.770377][ C0] ? nf_ct_iterate_cleanup+0x1f1/0x4e0 [ 377.775837][ C0] nf_ct_iterate_cleanup+0x217/0x4e0 [ 377.781167][ C0] ? nf_ct_alloc_hashtable+0x150/0x150 [ 377.786620][ C0] nf_ct_iterate_cleanup_net+0x133/0x190 [ 377.792249][ C0] ? nf_nat_masquerade_inet_unregister_notifiers+0x80/0x80 [ 377.799434][ C0] ? nf_ct_iterate_cleanup+0x4e0/0x4e0 [ 377.804885][ C0] ? nf_nat_masquerade_inet_unregister_notifiers+0x80/0x80 [ 377.812082][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 377.817621][ C0] iterate_cleanup_work+0x4a/0xd7 [ 377.822636][ C0] process_one_work+0x9af/0x1740 [ 377.827563][ C0] ? __schedule+0x776/0x17a0 [ 377.832162][ C0] ? pwq_dec_nr_in_flight+0x320/0x320 [ 377.837523][ C0] ? lock_acquire+0x190/0x410 [ 377.842203][ C0] worker_thread+0x98/0xe40 [ 377.846694][ C0] ? trace_hardirqs_on+0x67/0x240 [ 377.851721][ C0] kthread+0x361/0x430 [ 377.855782][ C0] ? process_one_work+0x1740/0x1740 [ 377.860972][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 377.867207][ C0] ret_from_fork+0x24/0x30 [ 377.871650][ C0] rcu: rcu_preempt kthread starved for 10582 jiffies! g6685 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 377.882734][ C0] rcu: RCU grace-period kthread stack dump: [ 377.888611][ C0] rcu_preempt R running task 29360 10 2 0x80004000 [ 377.896510][ C0] Call Trace: [ 377.899789][ C0] __schedule+0x76e/0x17a0 [ 377.904202][ C0] ? __sched_text_start+0x8/0x8 [ 377.909043][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 377.914840][ C0] ? schedule_timeout+0x47c/0xc50 [ 377.919862][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 377.925139][ C0] schedule+0xd9/0x260 [ 377.929205][ C0] schedule_timeout+0x486/0xc50 [ 377.934046][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 377.939846][ C0] ? usleep_range+0x170/0x170 [ 377.944632][ C0] ? trace_hardirqs_on+0x67/0x240 [ 377.949651][ C0] ? __kasan_check_read+0x11/0x20 [ 377.954674][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 377.960223][ C0] ? swake_up_one+0x60/0x60 [ 377.964732][ C0] rcu_gp_kthread+0x9b2/0x18d0 [ 377.969497][ C0] ? invoke_rcu_core+0x230/0x230 [ 377.974429][ C0] ? trace_hardirqs_on+0x67/0x240 [ 377.979444][ C0] ? __kasan_check_read+0x11/0x20 [ 377.984490][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 377.990758][ C0] ? __kthread_parkme+0x108/0x1c0 [ 377.995774][ C0] ? __kasan_check_read+0x11/0x20 [ 378.000794][ C0] kthread+0x361/0x430 [ 378.004853][ C0] ? invoke_rcu_core+0x230/0x230 [ 378.009783][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 378.016018][ C0] ret_from_fork+0x24/0x30