[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 54.135208][ T25] audit: type=1800 audit(1568231098.540:25): pid=8440 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 54.177021][ T25] audit: type=1800 audit(1568231098.550:26): pid=8440 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 54.228075][ T25] audit: type=1800 audit(1568231098.550:27): pid=8440 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 '10.128.0.48' (ECDSA) to the list of known hosts. syzkaller login: [ 307.484022][ T8594] IPVS: ftp: loaded support on port[0] = 21 [ 307.547729][ T8594] chnl_net:caif_netlink_parms(): no params data found [ 307.573413][ T8594] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.581296][ T8594] bridge0: port 1(bridge_slave_0) entered disabled state [ 307.589056][ T8594] device bridge_slave_0 entered promiscuous mode [ 307.596922][ T8594] bridge0: port 2(bridge_slave_1) entered blocking state [ 307.604128][ T8594] bridge0: port 2(bridge_slave_1) entered disabled state [ 307.611865][ T8594] device bridge_slave_1 entered promiscuous mode [ 307.628888][ T8594] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 307.639812][ T8594] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 307.657717][ T8594] team0: Port device team_slave_0 added [ 307.664510][ T8594] team0: Port device team_slave_1 added [ 307.739354][ T8594] device hsr_slave_0 entered promiscuous mode [ 307.797370][ T8594] device hsr_slave_1 entered promiscuous mode [ 307.844890][ T8594] bridge0: port 2(bridge_slave_1) entered blocking state [ 307.852093][ T8594] bridge0: port 2(bridge_slave_1) entered forwarding state [ 307.859881][ T8594] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.866932][ T8594] bridge0: port 1(bridge_slave_0) entered forwarding state [ 307.899598][ T8594] 8021q: adding VLAN 0 to HW filter on device bond0 [ 307.913379][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 307.934083][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 307.942447][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 307.951547][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 307.962440][ T8594] 8021q: adding VLAN 0 to HW filter on device team0 [ 307.972670][ T3784] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 307.981401][ T3784] bridge0: port 1(bridge_slave_0) entered blocking state [ 307.988510][ T3784] bridge0: port 1(bridge_slave_0) entered forwarding state [ 308.008393][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 308.016833][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 308.023947][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 308.031940][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 308.040822][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 308.051578][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 308.059498][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 308.072329][ T3784] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 308.082924][ T8594] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 308.099442][ T8594] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 413.156947][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 413.163764][ C0] rcu: 0-...!: (10499 ticks this GP) idle=9fe/0/0x3 softirq=9488/9488 fqs=7 [ 413.172724][ C0] (t=10501 jiffies g=6961 q=49) [ 413.177648][ C0] rcu: rcu_preempt kthread starved for 10488 jiffies! g6961 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 413.188897][ C0] rcu: RCU grace-period kthread stack dump: [ 413.194765][ C0] rcu_preempt I29112 10 2 0x80004000 [ 413.201078][ C0] Call Trace: [ 413.204427][ C0] __schedule+0x755/0x1580 [ 413.208831][ C0] ? __sched_text_start+0x8/0x8 [ 413.213674][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 413.219462][ C0] ? schedule_timeout+0x47c/0xc50 [ 413.224476][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 413.229742][ C0] schedule+0xd9/0x260 [ 413.233811][ C0] schedule_timeout+0x486/0xc50 [ 413.238641][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 413.244430][ C0] ? usleep_range+0x170/0x170 [ 413.249086][ C0] ? trace_hardirqs_on+0x67/0x240 [ 413.254091][ C0] ? __kasan_check_read+0x11/0x20 [ 413.259112][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 413.264639][ C0] ? swake_up_one+0x60/0x60 [ 413.269126][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 413.273886][ C0] ? rcu_barrier+0x310/0x310 [ 413.278465][ C0] ? trace_hardirqs_on+0x67/0x240 [ 413.283468][ C0] ? __kasan_check_read+0x11/0x20 [ 413.288478][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 413.294699][ C0] ? __kthread_parkme+0x108/0x1c0 [ 413.299701][ C0] ? __kasan_check_read+0x11/0x20 [ 413.304708][ C0] kthread+0x361/0x430 [ 413.308759][ C0] ? rcu_barrier+0x310/0x310 [ 413.313329][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 413.319566][ C0] ret_from_fork+0x24/0x30 [ 413.324014][ C0] NMI backtrace for cpu 0 [ 413.328328][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc7+ #0 [ 413.335463][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 413.345507][ C0] Call Trace: [ 413.348772][ C0] [ 413.351655][ C0] dump_stack+0x172/0x1f0 [ 413.355974][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 413.361157][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 413.367382][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 413.373004][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 413.378969][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 413.384841][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 413.389944][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 413.395470][ C0] ? raise_softirq+0x138/0x340 [ 413.400221][ C0] update_process_times+0x32/0x80 [ 413.405237][ C0] tick_sched_handle+0xa2/0x190 [ 413.410077][ C0] tick_sched_timer+0x53/0x140 [ 413.414827][ C0] __hrtimer_run_queues+0x364/0xe40 [ 413.420006][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 413.425275][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 413.430803][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 413.436500][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 413.442550][ C0] hrtimer_interrupt+0x314/0x770 [ 413.447479][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 413.453016][ C0] apic_timer_interrupt+0xf/0x20 [ 413.457989][ C0] RIP: 0010:hhf_dequeue+0x61a/0xa20 [ 413.463177][ C0] Code: 08 4c 8b 3b 48 89 fa 48 c1 ea 03 42 80 3c 22 00 0f 85 d0 03 00 00 49 8d 7f 08 4c 8b 73 08 48 89 fa 48 c1 ea 03 42 80 3c 22 00 <0f> 85 ac 03 00 00 4c 89 f2 4d 89 77 08 48 c1 ea 03 42 80 3c 22 00 [ 413.482862][ C0] RSP: 0018:ffff8880ae808f28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 413.491257][ C0] RAX: 1ffff11012b21617 RBX: ffff88809590b0b8 RCX: ffffffff85c7e0d1 [ 413.499210][ C0] RDX: 1ffff11012b2162b RSI: ffffffff85c7e0db RDI: ffff88809590b158 [ 413.507160][ C0] RBP: ffff8880ae808f78 R08: ffffffff88e7a1c0 R09: fffffbfff14e9555 [ 413.515121][ C0] R10: ffffffff88e7ab68 R11: ffffffff88e7a1c0 R12: dffffc0000000000 [ 413.523073][ C0] R13: ffff88809590adc0 R14: ffff88809590b150 R15: ffff88809590b150 [ 413.531031][ C0] ? apic_timer_interrupt+0xa/0x20 [ 413.536136][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 413.540715][ C0] ? hhf_dequeue+0x5db/0xa20 [ 413.545287][ C0] ? hhf_dequeue+0x5db/0xa20 [ 413.549928][ C0] __qdisc_run+0x1e7/0x19d0 [ 413.554453][ C0] ? dev_queue_xmit+0x18/0x20 [ 413.559118][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 413.564125][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 413.569496][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 413.574765][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 413.581021][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 413.586319][ C0] ? br_forward_finish+0x235/0x400 [ 413.591414][ C0] ? find_held_lock+0x35/0x130 [ 413.596159][ C0] ? br_forward_finish+0x235/0x400 [ 413.601257][ C0] dev_queue_xmit+0x18/0x20 [ 413.605739][ C0] ? dev_queue_xmit+0x18/0x20 [ 413.610395][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 413.615750][ C0] ? __kasan_check_read+0x11/0x20 [ 413.620758][ C0] br_forward_finish+0xfa/0x400 [ 413.625594][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 413.631122][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 413.635872][ C0] ? __kasan_check_read+0x11/0x20 [ 413.642007][ C0] __br_forward+0x641/0xb00 [ 413.646492][ C0] ? br_forward_finish+0x400/0x400 [ 413.651587][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 413.657129][ C0] deliver_clone+0x61/0xc0 [ 413.661529][ C0] maybe_deliver+0x2c7/0x390 [ 413.666103][ C0] br_flood+0x13a/0x3d0 [ 413.670245][ C0] br_dev_xmit+0x98c/0x15a0 [ 413.674744][ C0] ? br_poll_controller+0x10/0x10 [ 413.679750][ C0] ? netif_skb_features+0x6c2/0xb90 [ 413.684944][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 413.691177][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 413.696274][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 413.701279][ C0] ? __kasan_check_read+0x11/0x20 [ 413.706285][ C0] ? __lock_acquire+0x1702/0x4c30 [ 413.711401][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 413.716676][ C0] ? __kasan_check_read+0x11/0x20 [ 413.721695][ C0] ? mark_lock+0xc0/0x11e0 [ 413.726105][ C0] ? mark_held_locks+0xa4/0xf0 [ 413.730970][ C0] ? ip6_finish_output2+0xc40/0x2520 [ 413.736242][ C0] ? __ip6_finish_output+0x444/0xa50 [ 413.741516][ C0] ? ip6_finish_output2+0xc40/0x2520 [ 413.746792][ C0] dev_queue_xmit+0x18/0x20 [ 413.751275][ C0] ? dev_queue_xmit+0x18/0x20 [ 413.755933][ C0] ip6_finish_output2+0xf58/0x2520 [ 413.761030][ C0] ? ip6_forward_finish+0x530/0x530 [ 413.766211][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 413.772437][ C0] ? __kasan_check_read+0x11/0x20 [ 413.777448][ C0] __ip6_finish_output+0x444/0xa50 [ 413.782541][ C0] ? __ip6_finish_output+0x444/0xa50 [ 413.787822][ C0] ip6_finish_output+0x38/0x1f0 [ 413.792655][ C0] ip6_output+0x235/0x7c0 [ 413.796969][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 413.802062][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 413.807369][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 413.812310][ C0] mld_sendpack+0x9c7/0xea0 [ 413.816799][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 413.822080][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 413.827437][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 413.832791][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 413.837983][ C0] call_timer_fn+0x1ac/0x780 [ 413.842553][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 413.847904][ C0] ? msleep_interruptible+0x150/0x150 [ 413.853255][ C0] ? run_timer_softirq+0x685/0x17a0 [ 413.858437][ C0] ? trace_hardirqs_on+0x67/0x240 [ 413.863440][ C0] ? __kasan_check_read+0x11/0x20 [ 413.868439][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 413.873809][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 413.879184][ C0] run_timer_softirq+0x697/0x17a0 [ 413.884212][ C0] ? add_timer+0x930/0x930 [ 413.888613][ C0] ? kvm_clock_read+0x18/0x30 [ 413.893289][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 413.898388][ C0] ? sched_clock+0x2e/0x50 [ 413.902792][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 413.909022][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 413.915256][ C0] __do_softirq+0x262/0x98c [ 413.919743][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 413.924585][ C0] irq_exit+0x19b/0x1e0 [ 413.928732][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 413.934285][ C0] apic_timer_interrupt+0xf/0x20 [ 413.939205][ C0] [ 413.942132][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 413.947488][ C0] Code: 58 bf 6b fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 94 45 67 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 45 67 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be 5d 1f fa e8 89 [ 413.967074][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 413.975466][ C0] RAX: 1ffffffff11e5e8d RBX: ffffffff88e7a1c0 RCX: 0000000000000000 [ 413.983418][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa4c [ 413.991369][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000 [ 413.999324][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 414.007455][ C0] R13: ffffffff89c5aab8 R14: 0000000000000000 R15: 0000000000000000 [ 414.015426][ C0] ? default_idle+0x4e/0x360 [ 414.020000][ C0] arch_cpu_idle+0xa/0x10 [ 414.024323][ C0] default_idle_call+0x84/0xb0 [ 414.029079][ C0] do_idle+0x413/0x760 [ 414.033136][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 414.038140][ C0] ? trace_hardirqs_on+0x67/0x240 [ 414.043147][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 414.049369][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 414.054813][ C0] cpu_startup_entry+0x1b/0x20 [ 414.059560][ C0] rest_init+0x245/0x37b [ 414.063854][ C0] arch_call_rest_init+0xe/0x1b [ 414.068687][ C0] start_kernel+0x912/0x951 [ 414.073172][ C0] ? mem_encrypt_init+0xb/0xb [ 414.077835][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 414.084054][ C0] ? x86_family+0x41/0x50 [ 414.088367][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 414.094588][ C0] x86_64_start_reservations+0x29/0x2b [ 414.100035][ C0] x86_64_start_kernel+0x77/0x7b [ 414.104963][ C0] secondary_startup_64+0xa4/0xb0