[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 59.698745][ T26] audit: type=1800 audit(1568487848.333:25): pid=8639 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 59.742416][ T26] audit: type=1800 audit(1568487848.343:26): pid=8639 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 59.785613][ T26] audit: type=1800 audit(1568487848.343:27): pid=8639 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 '10.128.0.154' (ECDSA) to the list of known hosts. syzkaller login: [ 389.116305][ T8792] IPVS: ftp: loaded support on port[0] = 21 [ 389.184309][ T8792] chnl_net:caif_netlink_parms(): no params data found [ 389.216828][ T8792] bridge0: port 1(bridge_slave_0) entered blocking state [ 389.225306][ T8792] bridge0: port 1(bridge_slave_0) entered disabled state [ 389.233761][ T8792] device bridge_slave_0 entered promiscuous mode [ 389.242197][ T8792] bridge0: port 2(bridge_slave_1) entered blocking state [ 389.251269][ T8792] bridge0: port 2(bridge_slave_1) entered disabled state [ 389.259732][ T8792] device bridge_slave_1 entered promiscuous mode [ 389.278185][ T8792] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 389.289912][ T8792] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 389.311034][ T8792] team0: Port device team_slave_0 added [ 389.318865][ T8792] team0: Port device team_slave_1 added [ 389.385440][ T8792] device hsr_slave_0 entered promiscuous mode [ 389.423559][ T8792] device hsr_slave_1 entered promiscuous mode [ 389.471192][ T8792] bridge0: port 2(bridge_slave_1) entered blocking state [ 389.479376][ T8792] bridge0: port 2(bridge_slave_1) entered forwarding state [ 389.487886][ T8792] bridge0: port 1(bridge_slave_0) entered blocking state [ 389.495672][ T8792] bridge0: port 1(bridge_slave_0) entered forwarding state [ 389.530905][ T8792] 8021q: adding VLAN 0 to HW filter on device bond0 [ 389.547233][ T8794] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 389.559051][ T8794] bridge0: port 1(bridge_slave_0) entered disabled state [ 389.568366][ T8794] bridge0: port 2(bridge_slave_1) entered disabled state [ 389.577240][ T8794] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 389.590624][ T8792] 8021q: adding VLAN 0 to HW filter on device team0 [ 389.602260][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 389.611795][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 389.619564][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 389.644332][ T8797] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 389.654325][ T8797] bridge0: port 2(bridge_slave_1) entered blocking state [ 389.661668][ T8797] bridge0: port 2(bridge_slave_1) entered forwarding state [ 389.670433][ T8797] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 389.681580][ T8797] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 389.690576][ T8797] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 389.700084][ T8797] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 389.714510][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 389.725101][ T8792] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 389.745150][ T8792] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 494.932318][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 494.939175][ C1] rcu: 1-...!: (1 GPs behind) idle=cca/0/0x3 softirq=10353/10354 fqs=28 [ 494.947854][ C1] (t=10500 jiffies g=7305 q=40) [ 494.952781][ C1] rcu: rcu_preempt kthread starved for 10444 jiffies! g7305 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 494.964039][ C1] rcu: RCU grace-period kthread stack dump: [ 494.969910][ C1] rcu_preempt I29112 10 2 0x80004000 [ 494.976231][ C1] Call Trace: [ 494.979579][ C1] __schedule+0x755/0x1580 [ 494.983988][ C1] ? __sched_text_start+0x8/0x8 [ 494.988821][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 494.994620][ C1] ? schedule_timeout+0x47c/0xc50 [ 494.999630][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 495.004901][ C1] schedule+0xd9/0x260 [ 495.008960][ C1] schedule_timeout+0x486/0xc50 [ 495.013804][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 495.019770][ C1] ? usleep_range+0x170/0x170 [ 495.024427][ C1] ? trace_hardirqs_on+0x67/0x240 [ 495.029439][ C1] ? __kasan_check_read+0x11/0x20 [ 495.034451][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 495.039991][ C1] ? swake_up_one+0x60/0x60 [ 495.044498][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 495.049249][ C1] ? rcu_barrier+0x310/0x310 [ 495.053821][ C1] ? trace_hardirqs_on+0x67/0x240 [ 495.058842][ C1] ? __kasan_check_read+0x11/0x20 [ 495.063871][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 495.070112][ C1] ? __kthread_parkme+0x108/0x1c0 [ 495.075118][ C1] ? __kasan_check_read+0x11/0x20 [ 495.080142][ C1] kthread+0x361/0x430 [ 495.084195][ C1] ? rcu_barrier+0x310/0x310 [ 495.088766][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 495.095005][ C1] ret_from_fork+0x24/0x30 [ 495.099455][ C1] NMI backtrace for cpu 1 [ 495.103773][ C1] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.3.0-rc7+ #0 [ 495.111004][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 495.121042][ C1] Call Trace: [ 495.124309][ C1] [ 495.127366][ C1] dump_stack+0x172/0x1f0 [ 495.131684][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 495.136865][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 495.143087][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 495.148700][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 495.154666][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 495.160542][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 495.165659][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 495.171195][ C1] ? raise_softirq+0x138/0x340 [ 495.175959][ C1] update_process_times+0x32/0x80 [ 495.180967][ C1] tick_sched_handle+0xa2/0x190 [ 495.185802][ C1] tick_sched_timer+0x53/0x140 [ 495.190548][ C1] __hrtimer_run_queues+0x364/0xe40 [ 495.195728][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 495.200998][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 495.206628][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 495.212334][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 495.218652][ C1] hrtimer_interrupt+0x314/0x770 [ 495.223635][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 495.229180][ C1] apic_timer_interrupt+0xf/0x20 [ 495.234100][ C1] RIP: 0010:__list_add_valid+0x7b/0xa0 [ 495.239548][ C1] Code: 3c 48 8b 16 4c 39 e2 0f 85 5f 01 00 00 49 39 f5 0f 84 3f 01 00 00 4d 39 e5 0f 84 36 01 00 00 48 83 c4 08 b8 01 00 00 00 41 5c <41> 5d 5d c3 48 89 75 e8 e8 c8 52 6e fe 48 8b 75 e8 eb 9f 48 89 f7 [ 495.260092][ C1] RSP: 0018:ffff8880ae908f10 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 495.268485][ C1] RAX: 0000000000000001 RBX: ffff888095dfb9b8 RCX: ffffffff85c7e431 [ 495.276436][ C1] RDX: ffff888095dfba50 RSI: ffff888095dfba50 RDI: ffff888095dfba58 [ 495.284388][ C1] RBP: ffff8880ae908f18 R08: ffff8880a98d8340 R09: fffffbfff14e9755 [ 495.292351][ C1] R10: ffff8880a98d8ce8 R11: ffff8880a98d8340 R12: dffffc0000000000 [ 495.300310][ C1] R13: ffff888095dfb9b8 R14: ffff888095dfba58 R15: ffff888095dfba50 [ 495.308274][ C1] ? apic_timer_interrupt+0xa/0x20 [ 495.313425][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 495.318002][ C1] hhf_dequeue+0x66d/0xa20 [ 495.322424][ C1] __qdisc_run+0x1e7/0x19d0 [ 495.326940][ C1] ? dev_queue_xmit+0x18/0x20 [ 495.332146][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 495.337160][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 495.342523][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 495.347806][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 495.354085][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 495.359389][ C1] ? br_forward_finish+0x235/0x400 [ 495.364485][ C1] ? find_held_lock+0x35/0x130 [ 495.369231][ C1] ? br_forward_finish+0x235/0x400 [ 495.374340][ C1] dev_queue_xmit+0x18/0x20 [ 495.378835][ C1] ? dev_queue_xmit+0x18/0x20 [ 495.383493][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 495.388859][ C1] ? __kasan_check_read+0x11/0x20 [ 495.393868][ C1] br_forward_finish+0xfa/0x400 [ 495.398795][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 495.404325][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 495.409072][ C1] ? __kasan_check_read+0x11/0x20 [ 495.414084][ C1] __br_forward+0x641/0xb00 [ 495.418573][ C1] ? br_forward_finish+0x400/0x400 [ 495.424194][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 495.429729][ C1] deliver_clone+0x61/0xc0 [ 495.434142][ C1] maybe_deliver+0x2c7/0x390 [ 495.438716][ C1] br_flood+0x13a/0x3d0 [ 495.442875][ C1] br_dev_xmit+0x98c/0x15a0 [ 495.447364][ C1] ? br_poll_controller+0x10/0x10 [ 495.452381][ C1] ? netif_skb_features+0x6c2/0xb90 [ 495.457568][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 495.463792][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 495.468889][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 495.473910][ C1] ? __kasan_check_read+0x11/0x20 [ 495.478918][ C1] ? __lock_acquire+0x1702/0x4c30 [ 495.483933][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 495.489199][ C1] ? __kasan_check_read+0x11/0x20 [ 495.494205][ C1] ? mark_lock+0xc0/0x11e0 [ 495.498616][ C1] ? mark_held_locks+0xa4/0xf0 [ 495.503450][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 495.508718][ C1] ? __ip6_finish_output+0x444/0xa50 [ 495.513987][ C1] ? ip6_finish_output2+0xc40/0x2520 [ 495.519260][ C1] dev_queue_xmit+0x18/0x20 [ 495.523754][ C1] ? dev_queue_xmit+0x18/0x20 [ 495.528439][ C1] ip6_finish_output2+0xf58/0x2520 [ 495.533554][ C1] ? ip6_forward_finish+0x530/0x530 [ 495.538752][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 495.544984][ C1] ? __kasan_check_read+0x11/0x20 [ 495.550003][ C1] __ip6_finish_output+0x444/0xa50 [ 495.555097][ C1] ? __ip6_finish_output+0x444/0xa50 [ 495.560368][ C1] ip6_finish_output+0x38/0x1f0 [ 495.565223][ C1] ip6_output+0x235/0x7c0 [ 495.569562][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 495.575199][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 495.580538][ C1] ? icmp6_dst_alloc+0x432/0x660 [ 495.585485][ C1] mld_sendpack+0x9c7/0xea0 [ 495.589976][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 495.595249][ C1] ? mld_ifc_timer_expire+0x437/0x8a0 [ 495.600606][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 495.605969][ C1] mld_ifc_timer_expire+0x449/0x8a0 [ 495.611159][ C1] call_timer_fn+0x1ac/0x780 [ 495.615730][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 495.621085][ C1] ? msleep_interruptible+0x150/0x150 [ 495.626439][ C1] ? run_timer_softirq+0x685/0x17a0 [ 495.631630][ C1] ? trace_hardirqs_on+0x67/0x240 [ 495.636651][ C1] ? __kasan_check_read+0x11/0x20 [ 495.641658][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 495.647024][ C1] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 495.652385][ C1] run_timer_softirq+0x697/0x17a0 [ 495.657397][ C1] ? add_timer+0x930/0x930 [ 495.661803][ C1] ? kvm_clock_read+0x18/0x30 [ 495.666467][ C1] ? kvm_sched_clock_read+0x9/0x20 [ 495.671560][ C1] ? sched_clock+0x2e/0x50 [ 495.675957][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 495.682211][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 495.688614][ C1] __do_softirq+0x262/0x98c [ 495.693106][ C1] ? sched_clock_cpu+0x1b/0x1b0 [ 495.697950][ C1] irq_exit+0x19b/0x1e0 [ 495.702091][ C1] smp_apic_timer_interrupt+0x1a3/0x610 [ 495.707625][ C1] apic_timer_interrupt+0xf/0x20 [ 495.712549][ C1] [ 495.715473][ C1] RIP: 0010:native_safe_halt+0xe/0x10 [ 495.720829][ 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 [ 495.740414][ C1] RSP: 0018:ffff8880a98e7d68 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 495.748823][ C1] RAX: 1ffffffff11e5e8d RBX: ffff8880a98d8340 RCX: 0000000000000000 [ 495.756786][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffff8880a98d8bcc [ 495.764742][ C1] RBP: ffff8880a98e7d98 R08: ffff8880a98d8340 R09: 0000000000000000 [ 495.772698][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 495.780919][ C1] R13: ffffffff89c5ab78 R14: 0000000000000000 R15: 0000000000000001 [ 495.788897][ C1] ? default_idle+0x4e/0x360 [ 495.793475][ C1] arch_cpu_idle+0xa/0x10 [ 495.797785][ C1] default_idle_call+0x84/0xb0 [ 495.802618][ C1] do_idle+0x413/0x760 [ 495.806674][ C1] ? arch_cpu_idle_exit+0x80/0x80 [ 495.811680][ C1] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 495.817476][ C1] ? complete+0x61/0x80 [ 495.821619][ C1] cpu_startup_entry+0x1b/0x20 [ 495.828170][ C1] start_secondary+0x315/0x430 [ 495.832916][ C1] ? set_cpu_sibling_map+0x2180/0x2180 [ 495.838367][ C1] secondary_startup_64+0xa4/0xb0