[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.603716][ T26] audit: type=1800 audit(1568538427.050:25): pid=8615 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.649907][ T26] audit: type=1800 audit(1568538427.050:26): pid=8615 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.694755][ T26] audit: type=1800 audit(1568538427.050:27): pid=8615 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 '10.128.1.52' (ECDSA) to the list of known hosts. syzkaller login: [ 67.036133][ T8768] IPVS: ftp: loaded support on port[0] = 21 [ 67.103513][ T8768] chnl_net:caif_netlink_parms(): no params data found [ 67.130110][ T8768] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.138559][ T8768] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.146466][ T8768] device bridge_slave_0 entered promiscuous mode [ 67.154738][ T8768] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.161905][ T8768] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.169626][ T8768] device bridge_slave_1 entered promiscuous mode [ 67.188115][ T8768] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 67.199849][ T8768] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 67.219646][ T8768] team0: Port device team_slave_0 added [ 67.227201][ T8768] team0: Port device team_slave_1 added [ 67.302829][ T8768] device hsr_slave_0 entered promiscuous mode [ 67.370669][ T8768] device hsr_slave_1 entered promiscuous mode [ 67.449099][ T8768] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.456517][ T8768] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.464362][ T8768] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.471727][ T8768] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.505083][ T8768] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.515791][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.527189][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.535472][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.543533][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.555490][ T8768] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.565411][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 67.573940][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.581034][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.592202][ T8770] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.600952][ T8770] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.608050][ T8770] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.629954][ T8768] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 67.641412][ T8768] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 67.654845][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.663823][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.672319][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.681752][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.690054][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 67.699815][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.718253][ T8768] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 172.770252][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 172.777244][ C1] (detected by 1, t=10502 jiffies, g=6853, q=102) [ 172.783729][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294954385-4294943882), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 172.798983][ C1] swapper/1 R running task 30072 0 1 0x80004008 [ 172.806871][ C1] Call Trace: [ 172.810143][ C1] [ 172.812990][ C1] sched_show_task.cold+0x2ed/0x34e [ 172.818174][ C1] rcu_sched_clock_irq.cold+0xac8/0xc13 [ 172.823711][ C1] update_process_times+0x32/0x80 [ 172.828721][ C1] tick_sched_handle+0xa2/0x190 [ 172.833556][ C1] tick_sched_timer+0x53/0x140 [ 172.838324][ C1] __hrtimer_run_queues+0x364/0xe40 [ 172.843509][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 172.848798][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 172.854325][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 172.860026][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 172.866076][ C1] hrtimer_interrupt+0x314/0x770 [ 172.871095][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 172.876623][ C1] apic_timer_interrupt+0xf/0x20 [ 172.881566][ C1] RIP: 0010:hhf_dequeue+0x55/0xa20 [ 172.886685][ C1] Code: 89 45 d0 48 c1 e8 03 4c 01 e0 48 89 45 c0 49 8d 85 90 03 00 00 48 89 45 c8 48 c1 e8 03 48 89 45 b8 e8 9f 96 aa fb 48 8b 45 c0 <80> 38 00 0f 85 a8 07 00 00 48 8b 75 d0 49 8b 85 80 03 00 00 49 89 [ 172.906300][ C1] RSP: 0018:ffff8880ae908f28 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 172.914705][ C1] RAX: ffffed10142d8ab8 RBX: ffff8880a16c5538 RCX: ffffffff85c7e4d9 [ 172.922661][ C1] RDX: 0000000000000100 RSI: ffffffff85c7deb1 RDI: ffff8880a16c5540 [ 172.930614][ C1] RBP: ffff8880ae908f78 R08: ffff8880a98d8340 R09: fffffbfff14e9755 [ 172.938563][ C1] R10: ffff8880a98d8ce8 R11: ffff8880a98d8340 R12: dffffc0000000000 [ 172.946515][ C1] R13: ffff8880a16c5240 R14: ffff8880a16c55d8 R15: ffff8880a16c55d0 [ 172.954489][ C1] ? apic_timer_interrupt+0xa/0x20 [ 172.959613][ C1] ? hhf_dequeue+0x679/0xa20 [ 172.964192][ C1] ? hhf_dequeue+0x51/0xa20 [ 172.968692][ C1] ? hhf_dequeue+0x51/0xa20 [ 172.973282][ C1] __qdisc_run+0x1e7/0x19d0 [ 172.977788][ C1] ? dev_queue_xmit+0x18/0x20 [ 172.982472][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 172.989313][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 172.994690][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 172.999973][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 173.006193][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 173.011469][ C1] ? br_forward_finish+0x235/0x400 [ 173.016564][ C1] ? find_held_lock+0x35/0x130 [ 173.021311][ C1] ? br_forward_finish+0x235/0x400 [ 173.026409][ C1] dev_queue_xmit+0x18/0x20 [ 173.030895][ C1] ? dev_queue_xmit+0x18/0x20 [ 173.035556][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 173.040914][ C1] ? __kasan_check_read+0x11/0x20 [ 173.045925][ C1] br_forward_finish+0xfa/0x400 [ 173.050760][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 173.056300][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 173.061049][ C1] ? __kasan_check_read+0x11/0x20 [ 173.066059][ C1] __br_forward+0x641/0xb00 [ 173.070548][ C1] ? br_forward_finish+0x400/0x400 [ 173.075644][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 173.081186][ C1] deliver_clone+0x61/0xc0 [ 173.085585][ C1] maybe_deliver+0x2c7/0x390 [ 173.090165][ C1] br_flood+0x13a/0x3d0 [ 173.094325][ C1] br_dev_xmit+0x98c/0x15a0 [ 173.098814][ C1] ? br_poll_controller+0x10/0x10 [ 173.103824][ C1] ? netif_skb_features+0x6c2/0xb90 [ 173.109013][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 173.115241][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 173.120339][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 173.125348][ C1] ? __kasan_check_read+0x11/0x20 [ 173.130368][ C1] ? __lock_acquire+0x1702/0x4c30 [ 173.136341][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 173.141609][ C1] ? __kasan_check_read+0x11/0x20 [ 173.146615][ C1] ? mark_lock+0xc0/0x11e0 [ 173.151018][ C1] ? mark_held_locks+0xa4/0xf0 [ 173.155763][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 173.161031][ C1] ? __ip6_finish_output+0x444/0xa50 [ 173.166298][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 173.171569][ C1] dev_queue_xmit+0x18/0x20 [ 173.176072][ C1] ? dev_queue_xmit+0x18/0x20 [ 173.180736][ C1] ip6_finish_output2+0xf58/0x2520 [ 173.185847][ C1] ? ip6_forward_finish+0x530/0x530 [ 173.191032][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 173.197256][ C1] ? __kasan_check_read+0x11/0x20 [ 173.202270][ C1] __ip6_finish_output+0x444/0xa50 [ 173.207365][ C1] ? __ip6_finish_output+0x444/0xa50 [ 173.212635][ C1] ip6_finish_output+0x38/0x1f0 [ 173.217479][ C1] ip6_output+0x235/0x7c0 [ 173.221797][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 173.226896][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 173.232165][ C1] ? icmp6_dst_alloc+0x432/0x660 [ 173.237100][ C1] mld_sendpack+0x9c7/0xea0 [ 173.241589][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 173.247035][ C1] ? mld_ifc_timer_expire+0x437/0x8a0 [ 173.252395][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 173.257761][ C1] mld_ifc_timer_expire+0x449/0x8a0 [ 173.262951][ C1] call_timer_fn+0x1ac/0x780 [ 173.267530][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 173.272895][ C1] ? msleep_interruptible+0x150/0x150 [ 173.278249][ C1] ? run_timer_softirq+0x685/0x17a0 [ 173.283430][ C1] ? trace_hardirqs_on+0x67/0x240 [ 173.288437][ C1] ? __kasan_check_read+0x11/0x20 [ 173.293443][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 173.298793][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 173.304148][ C1] run_timer_softirq+0x697/0x17a0 [ 173.309172][ C1] ? add_timer+0x930/0x930 [ 173.313570][ C1] ? kvm_clock_read+0x18/0x30 [ 173.318228][ C1] ? kvm_sched_clock_read+0x9/0x20 [ 173.323322][ C1] ? sched_clock+0x2e/0x50 [ 173.327721][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 173.333945][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 173.340174][ C1] __do_softirq+0x262/0x98c [ 173.344660][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 173.349499][ C1] irq_exit+0x19b/0x1e0 [ 173.353642][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 173.359170][ C1] apic_timer_interrupt+0xf/0x20 [ 173.364260][ C1] [ 173.367194][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 173.372649][ 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 [ 173.392235][ C1] RSP: 0018:ffff8880a98e7d68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 173.400639][ C1] RAX: 1ffffffff11e5e8d RBX: ffff8880a98d8340 RCX: 0000000000000000 [ 173.408599][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98d8bcc [ 173.416552][ C1] RBP: ffff8880a98e7d98 R08: ffff8880a98d8340 R09: 0000000000000000 [ 173.424507][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 173.432457][ C1] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000001 [ 173.440436][ C1] ? default_idle+0x4e/0x360 [ 173.445014][ C1] arch_cpu_idle+0xa/0x10 [ 173.449324][ C1] default_idle_call+0x84/0xb0 [ 173.454079][ C1] do_idle+0x413/0x760 [ 173.458137][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 173.463141][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 173.468940][ C1] ? complete+0x61/0x80 [ 173.473085][ C1] cpu_startup_entry+0x1b/0x20 [ 173.477834][ C1] start_secondary+0x315/0x430 [ 173.482582][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 173.488032][ C1] secondary_startup_64+0xa4/0xb0 [ 173.493067][ C1] rcu: rcu_preempt kthread starved for 10574 jiffies! g6853 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 173.504148][ C1] rcu: RCU grace-period kthread stack dump: [ 173.510019][ C1] rcu_preempt R running task 29440 10 2 0x80004000 [ 173.517917][ C1] Call Trace: [ 173.521200][ C1] __schedule+0x755/0x1580 [ 173.525611][ C1] ? __sched_text_start+0x8/0x8 [ 173.530453][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 173.536240][ C1] ? schedule_timeout+0x47c/0xc50 [ 173.541247][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 173.546516][ C1] schedule+0xd9/0x260 [ 173.550572][ C1] schedule_timeout+0x486/0xc50 [ 173.555405][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 173.561198][ C1] ? usleep_range+0x170/0x170 [ 173.565857][ C1] ? trace_hardirqs_on+0x67/0x240 [ 173.570865][ C1] ? __kasan_check_read+0x11/0x20 [ 173.575877][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 173.581405][ C1] ? swake_up_one+0x60/0x60 [ 173.585893][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 173.590650][ C1] ? rcu_barrier+0x310/0x310 [ 173.595234][ C1] ? trace_hardirqs_on+0x67/0x240 [ 173.600243][ C1] ? __kasan_check_read+0x11/0x20 [ 173.605256][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 173.611479][ C1] ? __kthread_parkme+0x108/0x1c0 [ 173.616490][ C1] ? __kasan_check_read+0x11/0x20 [ 173.621498][ C1] kthread+0x361/0x430 [ 173.625550][ C1] ? rcu_barrier+0x310/0x310 [ 173.630137][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 173.636367][ C1] ret_from_fork+0x24/0x30