[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.079063][ T23] audit: type=1800 audit(1568544753.309:25): pid=8531 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.124001][ T23] audit: type=1800 audit(1568544753.309:26): pid=8531 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.161201][ T23] audit: type=1800 audit(1568544753.319:27): pid=8531 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 '10.128.0.19' (ECDSA) to the list of known hosts. syzkaller login: [ 333.215085][ T8687] IPVS: ftp: loaded support on port[0] = 21 [ 333.276274][ T8687] chnl_net:caif_netlink_parms(): no params data found [ 333.303191][ T8687] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.311407][ T8687] bridge0: port 1(bridge_slave_0) entered disabled state [ 333.319293][ T8687] device bridge_slave_0 entered promiscuous mode [ 333.327739][ T8687] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.334802][ T8687] bridge0: port 2(bridge_slave_1) entered disabled state [ 333.342731][ T8687] device bridge_slave_1 entered promiscuous mode [ 333.359386][ T8687] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 333.370017][ T8687] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 333.388306][ T8687] team0: Port device team_slave_0 added [ 333.394999][ T8687] team0: Port device team_slave_1 added [ 333.448976][ T8687] device hsr_slave_0 entered promiscuous mode [ 333.486924][ T8687] device hsr_slave_1 entered promiscuous mode [ 333.564584][ T8687] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.571747][ T8687] bridge0: port 2(bridge_slave_1) entered forwarding state [ 333.579445][ T8687] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.586487][ T8687] bridge0: port 1(bridge_slave_0) entered forwarding state [ 333.619605][ T8687] 8021q: adding VLAN 0 to HW filter on device bond0 [ 333.630706][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 333.650909][ T8689] bridge0: port 1(bridge_slave_0) entered disabled state [ 333.660254][ T8689] bridge0: port 2(bridge_slave_1) entered disabled state [ 333.669301][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 333.680302][ T8687] 8021q: adding VLAN 0 to HW filter on device team0 [ 333.698025][ T8692] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 333.706576][ T8692] bridge0: port 1(bridge_slave_0) entered blocking state [ 333.713669][ T8692] bridge0: port 1(bridge_slave_0) entered forwarding state [ 333.721340][ T8692] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 333.729822][ T8692] bridge0: port 2(bridge_slave_1) entered blocking state [ 333.736892][ T8692] bridge0: port 2(bridge_slave_1) entered forwarding state [ 333.753833][ T8687] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 333.764805][ T8687] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 333.777454][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 333.786057][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 333.794637][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 333.803684][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 333.812090][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 333.819760][ T8689] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 333.837643][ T8687] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 438.896625][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 438.903794][ C1] (detected by 1, t=10502 jiffies, g=7161, q=81) [ 438.910209][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294981043-4294970540), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 438.923563][ C1] swapper/1 R running task 30072 0 1 0x80004008 [ 438.931448][ C1] Call Trace: [ 438.934714][ C1] [ 438.937560][ C1] sched_show_task.cold+0x2ed/0x34e [ 438.942746][ C1] rcu_sched_clock_irq.cold+0xac8/0xc13 [ 438.948290][ C1] update_process_times+0x32/0x80 [ 438.953296][ C1] tick_sched_handle+0xa2/0x190 [ 438.958127][ C1] tick_sched_timer+0x53/0x140 [ 438.963238][ C1] __hrtimer_run_queues+0x364/0xe40 [ 438.968419][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 438.973711][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 438.979237][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 438.984935][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 438.990988][ C1] hrtimer_interrupt+0x314/0x770 [ 438.995978][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 439.001521][ C1] apic_timer_interrupt+0xf/0x20 [ 439.006442][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.013287][ C1] Code: 48 89 e5 48 8b 4d 08 e8 d8 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe bf 05 00 00 00 48 89 e5 48 8b 4d 08 e8 ba fe ff ff <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 07 00 00 00 [ 439.032886][ C1] RSP: 0018:ffff8880ae9095b8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 439.041292][ C1] RAX: 0000000000000502 RBX: ffff88808c6da2f8 RCX: ffffffff85c7df19 [ 439.049248][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 439.057206][ C1] RBP: ffff8880ae9095b8 R08: ffff8880a98d8340 R09: fffffbfff14e9755 [ 439.065163][ C1] R10: ffff8880a98d8c98 R11: ffff8880a98d8340 R12: dffffc0000000000 [ 439.073118][ C1] R13: ffff88808c6da000 R14: ffff88808c6da390 R15: 0000000000000000 [ 439.081094][ C1] ? apic_timer_interrupt+0xa/0x20 [ 439.086240][ C1] ? hhf_dequeue+0xb9/0xa20 [ 439.090746][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.096976][ C1] hhf_dequeue+0xb9/0xa20 [ 439.101330][ C1] __qdisc_run+0x1e7/0x19d0 [ 439.105842][ C1] ? dev_queue_xmit+0x18/0x20 [ 439.110507][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 439.115512][ C1] ? __kasan_check_read+0x11/0x20 [ 439.120536][ C1] ? __lock_acquire+0x1702/0x4c30 [ 439.125546][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 439.130811][ C1] ? __kasan_check_read+0x11/0x20 [ 439.135826][ C1] ? mark_lock+0xc0/0x11e0 [ 439.140228][ C1] ? mark_held_locks+0xa4/0xf0 [ 439.145009][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 439.150277][ C1] ? __ip6_finish_output+0x444/0xa50 [ 439.155552][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 439.160824][ C1] dev_queue_xmit+0x18/0x20 [ 439.165312][ C1] ? dev_queue_xmit+0x18/0x20 [ 439.169998][ C1] ip6_finish_output2+0xf58/0x2520 [ 439.175184][ C1] ? ip6_forward_finish+0x530/0x530 [ 439.180380][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.186606][ C1] ? __kasan_check_read+0x11/0x20 [ 439.191624][ C1] __ip6_finish_output+0x444/0xa50 [ 439.196714][ C1] ? __ip6_finish_output+0x444/0xa50 [ 439.201987][ C1] ip6_finish_output+0x38/0x1f0 [ 439.206820][ C1] ip6_output+0x235/0x7c0 [ 439.211133][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 439.216326][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 439.221624][ C1] ? icmp6_dst_alloc+0x432/0x660 [ 439.226571][ C1] mld_sendpack+0x9c7/0xea0 [ 439.231324][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 439.236623][ C1] ? mld_ifc_timer_expire+0x437/0x8a0 [ 439.241992][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 439.247346][ C1] mld_ifc_timer_expire+0x449/0x8a0 [ 439.252545][ C1] call_timer_fn+0x1ac/0x780 [ 439.257119][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 439.262646][ C1] ? msleep_interruptible+0x150/0x150 [ 439.268185][ C1] ? run_timer_softirq+0x685/0x17a0 [ 439.273369][ C1] ? trace_hardirqs_on+0x67/0x240 [ 439.278386][ C1] ? __kasan_check_read+0x11/0x20 [ 439.283401][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 439.288757][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 439.295588][ C1] run_timer_softirq+0x697/0x17a0 [ 439.300612][ C1] ? add_timer+0x930/0x930 [ 439.305008][ C1] ? kvm_clock_read+0x18/0x30 [ 439.309695][ C1] ? kvm_sched_clock_read+0x9/0x20 [ 439.314787][ C1] ? sched_clock+0x2e/0x50 [ 439.319197][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.325430][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 439.331679][ C1] __do_softirq+0x262/0x98c [ 439.336176][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 439.341012][ C1] irq_exit+0x19b/0x1e0 [ 439.345161][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 439.350694][ C1] apic_timer_interrupt+0xf/0x20 [ 439.355607][ C1] [ 439.358541][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 439.363898][ C1] Code: b8 af 6b fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d f4 35 67 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d e4 35 67 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 1e 4e 1f fa e8 e9 [ 439.383493][ C1] RSP: 0018:ffff8880a98e7d68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 439.391882][ C1] RAX: 1ffffffff11e5e8d RBX: ffff8880a98d8340 RCX: 0000000000000000 [ 439.400713][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98d8bcc [ 439.408666][ C1] RBP: ffff8880a98e7d98 R08: ffff8880a98d8340 R09: 0000000000000000 [ 439.416634][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 439.424586][ C1] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000001 [ 439.432555][ C1] ? default_idle+0x4e/0x360 [ 439.437133][ C1] arch_cpu_idle+0xa/0x10 [ 439.441624][ C1] default_idle_call+0x84/0xb0 [ 439.446454][ C1] do_idle+0x413/0x760 [ 439.450506][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 439.455942][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 439.461726][ C1] ? complete+0x61/0x80 [ 439.465867][ C1] cpu_startup_entry+0x1b/0x20 [ 439.470623][ C1] start_secondary+0x315/0x430 [ 439.475366][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 439.480813][ C1] secondary_startup_64+0xa4/0xb0 [ 439.485831][ C1] rcu: rcu_preempt kthread starved for 10560 jiffies! g7161 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 439.496919][ C1] rcu: RCU grace-period kthread stack dump: [ 439.502793][ C1] rcu_preempt R running task 29112 10 2 0x80004000 [ 439.510687][ C1] Call Trace: [ 439.514002][ C1] __schedule+0x755/0x1580 [ 439.518417][ C1] ? __sched_text_start+0x8/0x8 [ 439.523247][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 439.529034][ C1] ? schedule_timeout+0x47c/0xc50 [ 439.534042][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 439.539309][ C1] schedule+0xd9/0x260 [ 439.543365][ C1] schedule_timeout+0x486/0xc50 [ 439.548193][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 439.553981][ C1] ? usleep_range+0x170/0x170 [ 439.558645][ C1] ? trace_hardirqs_on+0x67/0x240 [ 439.563753][ C1] ? __kasan_check_read+0x11/0x20 [ 439.568769][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 439.574299][ C1] ? swake_up_one+0x60/0x60 [ 439.578803][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 439.586512][ C1] ? rcu_barrier+0x310/0x310 [ 439.591093][ C1] ? trace_hardirqs_on+0x67/0x240 [ 439.596094][ C1] ? __kasan_check_read+0x11/0x20 [ 439.601101][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 439.607319][ C1] ? __kthread_parkme+0x108/0x1c0 [ 439.612338][ C1] ? __kasan_check_read+0x11/0x20 [ 439.617343][ C1] kthread+0x361/0x430 [ 439.621395][ C1] ? rcu_barrier+0x310/0x310 [ 439.625981][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 439.632212][ C1] ret_from_fork+0x24/0x30