[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.184427][ T26] audit: type=1800 audit(1568192151.493:25): pid=8550 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.206554][ T26] audit: type=1800 audit(1568192151.493:26): pid=8550 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.245051][ T26] audit: type=1800 audit(1568192151.503:27): pid=8550 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 '10.128.0.69' (ECDSA) to the list of known hosts. syzkaller login: [ 327.684543][ T8705] IPVS: ftp: loaded support on port[0] = 21 [ 327.749182][ T8705] chnl_net:caif_netlink_parms(): no params data found [ 327.778849][ T8705] bridge0: port 1(bridge_slave_0) entered blocking state [ 327.786788][ T8705] bridge0: port 1(bridge_slave_0) entered disabled state [ 327.794895][ T8705] device bridge_slave_0 entered promiscuous mode [ 327.803546][ T8705] bridge0: port 2(bridge_slave_1) entered blocking state [ 327.810729][ T8705] bridge0: port 2(bridge_slave_1) entered disabled state [ 327.818673][ T8705] device bridge_slave_1 entered promiscuous mode [ 327.837354][ T8705] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 327.848858][ T8705] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 327.868201][ T8705] team0: Port device team_slave_0 added [ 327.875413][ T8705] team0: Port device team_slave_1 added [ 327.953079][ T8705] device hsr_slave_0 entered promiscuous mode [ 328.023300][ T8705] device hsr_slave_1 entered promiscuous mode [ 328.098597][ T8705] bridge0: port 2(bridge_slave_1) entered blocking state [ 328.105915][ T8705] bridge0: port 2(bridge_slave_1) entered forwarding state [ 328.113926][ T8705] bridge0: port 1(bridge_slave_0) entered blocking state [ 328.121077][ T8705] bridge0: port 1(bridge_slave_0) entered forwarding state [ 328.155218][ T8705] 8021q: adding VLAN 0 to HW filter on device bond0 [ 328.166214][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 328.176561][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 328.185865][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 328.194005][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 328.207027][ T8705] 8021q: adding VLAN 0 to HW filter on device team0 [ 328.218433][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 328.227537][ T22] bridge0: port 1(bridge_slave_0) entered blocking state [ 328.234704][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state [ 328.252429][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 328.260826][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 328.267942][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 328.275973][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 328.287457][ T8710] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 328.295559][ T8710] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 328.307650][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 328.319892][ T8705] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 328.334056][ T8705] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 328.342447][ T8710] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 328.359476][ T8705] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 433.460997][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 433.467725][ C0] rcu: 0-...!: (10500 ticks this GP) idle=076/0/0x3 softirq=9769/9769 fqs=0 [ 433.476705][ C0] (t=10500 jiffies g=7285 q=50) [ 433.481630][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g7285 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 433.492880][ C0] rcu: RCU grace-period kthread stack dump: [ 433.498762][ C0] rcu_preempt I29688 10 2 0x80004000 [ 433.505082][ C0] Call Trace: [ 433.508443][ C0] __schedule+0x755/0x1580 [ 433.512867][ C0] ? __sched_text_start+0x8/0x8 [ 433.517712][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 433.523502][ C0] ? schedule_timeout+0x47c/0xc50 [ 433.528876][ C0] ? lockdep_hardirqs_on+0x418/0x5d0 [ 433.534150][ C0] schedule+0xd9/0x260 [ 433.538211][ C0] schedule_timeout+0x486/0xc50 [ 433.543047][ C0] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 433.548838][ C0] ? usleep_range+0x170/0x170 [ 433.553543][ C0] ? trace_hardirqs_on+0x67/0x240 [ 433.558552][ C0] ? __kasan_check_read+0x11/0x20 [ 433.563655][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 433.569210][ C0] ? swake_up_one+0x60/0x60 [ 433.573713][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 433.578468][ C0] ? rcu_barrier+0x310/0x310 [ 433.583042][ C0] ? trace_hardirqs_on+0x67/0x240 [ 433.588048][ C0] ? __kasan_check_read+0x11/0x20 [ 433.593061][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 433.599386][ C0] ? __kthread_parkme+0x108/0x1c0 [ 433.604398][ C0] ? __kasan_check_read+0x11/0x20 [ 433.609427][ C0] kthread+0x361/0x430 [ 433.613484][ C0] ? rcu_barrier+0x310/0x310 [ 433.618062][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 433.624307][ C0] ret_from_fork+0x24/0x30 [ 433.628765][ C0] NMI backtrace for cpu 0 [ 433.633083][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc7+ #0 [ 433.640314][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 433.650352][ C0] Call Trace: [ 433.653631][ C0] [ 433.656519][ C0] dump_stack+0x172/0x1f0 [ 433.660853][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 433.666041][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 433.672285][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 433.677921][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 433.683899][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 433.690044][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 433.695159][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 433.700722][ C0] ? raise_softirq+0x138/0x340 [ 433.705480][ C0] update_process_times+0x32/0x80 [ 433.710491][ C0] tick_sched_handle+0xa2/0x190 [ 433.715414][ C0] tick_sched_timer+0x53/0x140 [ 433.720168][ C0] __hrtimer_run_queues+0x364/0xe40 [ 433.725537][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 433.730820][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 433.736351][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 433.742057][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 433.748114][ C0] hrtimer_interrupt+0x314/0x770 [ 433.753052][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 433.758584][ C0] apic_timer_interrupt+0xf/0x20 [ 433.763585][ C0] RIP: 0010:hhf_dequeue+0x661/0xa20 [ 433.768780][ C0] Code: 89 3e e8 12 94 aa fb 4d 8d b5 98 03 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 0f 85 5b 03 00 00 4d 8b bd 98 03 00 00 48 89 df <48> 8b 55 c8 4c 89 fe e8 13 70 76 fd 31 ff 89 c6 88 45 b0 e8 17 95 [ 433.788455][ C0] RSP: 0018:ffff8880ae809038 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 433.796864][ C0] RAX: 1ffff11013fc1193 RBX: ffff88809fe08bf8 RCX: ffffffff85c7e0d1 [ 433.805521][ C0] RDX: 0000000000000100 RSI: ffffffff85c7e13e RDI: ffff88809fe08bf8 [ 433.813649][ C0] RBP: ffff8880ae809088 R08: ffffffff88e7a1c0 R09: fffffbfff14e9555 [ 433.821616][ C0] R10: ffffffff88e7ab40 R11: ffffffff88e7a1c0 R12: dffffc0000000000 [ 433.829733][ C0] R13: ffff88809fe08900 R14: ffff88809fe08c98 R15: ffff88809fe08c90 [ 433.837819][ C0] ? apic_timer_interrupt+0xa/0x20 [ 433.843107][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 433.847713][ C0] ? hhf_dequeue+0x63e/0xa20 [ 433.852292][ C0] ? hhf_dequeue+0x63e/0xa20 [ 433.856996][ C0] __qdisc_run+0x1e7/0x19d0 [ 433.861805][ C0] ? dev_queue_xmit+0x18/0x20 [ 433.866648][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 433.871743][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 433.877130][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 433.882503][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 433.888806][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 433.894131][ C0] ? br_forward_finish+0x235/0x400 [ 433.899232][ C0] ? find_held_lock+0x35/0x130 [ 433.903983][ C0] ? br_forward_finish+0x235/0x400 [ 433.909102][ C0] dev_queue_xmit+0x18/0x20 [ 433.913608][ C0] ? dev_queue_xmit+0x18/0x20 [ 433.918286][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 433.923752][ C0] ? __kasan_check_read+0x11/0x20 [ 433.928768][ C0] br_forward_finish+0xfa/0x400 [ 433.933627][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 433.939251][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 433.944031][ C0] ? __kasan_check_read+0x11/0x20 [ 433.949048][ C0] __br_forward+0x641/0xb00 [ 433.953542][ C0] ? br_forward_finish+0x400/0x400 [ 433.959134][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 433.964669][ C0] deliver_clone+0x61/0xc0 [ 433.969074][ C0] maybe_deliver+0x2c7/0x390 [ 433.973653][ C0] br_flood+0x13a/0x3d0 [ 433.977838][ C0] br_dev_xmit+0x98c/0x15a0 [ 433.982331][ C0] ? br_poll_controller+0x10/0x10 [ 433.987352][ C0] ? netif_skb_features+0x6c2/0xb90 [ 433.992725][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 433.998982][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 434.004095][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 434.009108][ C0] ? __kasan_check_read+0x11/0x20 [ 434.014132][ C0] ? __lock_acquire+0x2b42/0x4c30 [ 434.019140][ C0] ? __lock_acquire+0x8a2/0x4c30 [ 434.024073][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 434.029366][ C0] ? __kasan_check_read+0x11/0x20 [ 434.034471][ C0] ? mark_lock+0xc0/0x11e0 [ 434.038891][ C0] ? mark_held_locks+0xa4/0xf0 [ 434.043722][ C0] ? ip_finish_output2+0x13e2/0x2570 [ 434.048993][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 434.054613][ C0] ? ip_finish_output2+0x13e2/0x2570 [ 434.059891][ C0] dev_queue_xmit+0x18/0x20 [ 434.064378][ C0] ? dev_queue_xmit+0x18/0x20 [ 434.069037][ C0] ip_finish_output2+0x1726/0x2570 [ 434.074197][ C0] ? nf_ct_deliver_cached_events+0x23d/0x6e0 [ 434.080170][ C0] ? ip_frag_next+0x910/0x910 [ 434.084859][ C0] __ip_finish_output+0x5fc/0xb90 [ 434.089898][ C0] ? __ip_finish_output+0x5fc/0xb90 [ 434.095113][ C0] ? audit_alloc_mark+0x3d0/0x500 [ 434.100152][ C0] ip_finish_output+0x38/0x1f0 [ 434.104973][ C0] ip_output+0x21f/0x640 [ 434.109217][ C0] ? ip_mc_output+0xf40/0xf40 [ 434.113880][ C0] ? __ip_finish_output+0xb90/0xb90 [ 434.119079][ C0] ip_local_out+0xbb/0x190 [ 434.124211][ C0] igmpv3_sendpack+0x1b5/0x2c0 [ 434.128963][ C0] igmp_ifc_timer_expire+0x687/0xa00 [ 434.134241][ C0] call_timer_fn+0x1ac/0x780 [ 434.138912][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 434.144011][ C0] ? msleep_interruptible+0x150/0x150 [ 434.149546][ C0] ? run_timer_softirq+0x685/0x17a0 [ 434.154769][ C0] ? trace_hardirqs_on+0x67/0x240 [ 434.159867][ C0] ? __kasan_check_read+0x11/0x20 [ 434.164881][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 434.169991][ C0] ? __ip_mc_dec_group+0x520/0x520 [ 434.175091][ C0] run_timer_softirq+0x697/0x17a0 [ 434.180303][ C0] ? add_timer+0x930/0x930 [ 434.184724][ C0] ? kvm_clock_read+0x18/0x30 [ 434.189382][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 434.194488][ C0] ? sched_clock+0x2e/0x50 [ 434.198888][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 434.205128][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 434.211370][ C0] __do_softirq+0x262/0x98c [ 434.215855][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 434.220714][ C0] irq_exit+0x19b/0x1e0 [ 434.224856][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 434.230391][ C0] apic_timer_interrupt+0xf/0x20 [ 434.235322][ C0] [ 434.238506][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 434.243870][ 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 [ 434.263663][ C0] RSP: 0018:ffffffff88e07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 434.272058][ C0] RAX: 1ffffffff11e5e8d RBX: ffffffff88e7a1c0 RCX: 0000000000000000 [ 434.280014][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff88e7aa4c [ 434.287968][ C0] RBP: ffffffff88e07d18 R08: ffffffff88e7a1c0 R09: 0000000000000000 [ 434.295935][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 434.303890][ C0] R13: ffffffff89c5aab8 R14: 0000000000000000 R15: 0000000000000000 [ 434.311883][ C0] ? default_idle+0x4e/0x360 [ 434.316462][ C0] arch_cpu_idle+0xa/0x10 [ 434.320790][ C0] default_idle_call+0x84/0xb0 [ 434.325641][ C0] do_idle+0x413/0x760 [ 434.329872][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 434.334879][ C0] ? trace_hardirqs_on+0x67/0x240 [ 434.339888][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 434.346200][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 434.351649][ C0] cpu_startup_entry+0x1b/0x20 [ 434.356399][ C0] rest_init+0x245/0x37b [ 434.360694][ C0] arch_call_rest_init+0xe/0x1b [ 434.365529][ C0] start_kernel+0x912/0x951 [ 434.370018][ C0] ? mem_encrypt_init+0xb/0xb [ 434.374709][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 434.381117][ C0] ? x86_family+0x41/0x50 [ 434.385434][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 434.391664][ C0] x86_64_start_reservations+0x29/0x2b [ 434.397126][ C0] x86_64_start_kernel+0x77/0x7b [ 434.402050][ C0] secondary_startup_64+0xa4/0xb0