[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.743908][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 64.743918][ T26] audit: type=1800 audit(1568370144.928:29): pid=9672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 64.777910][ T26] audit: type=1800 audit(1568370144.928:30): pid=9672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.57' (ECDSA) to the list of known hosts. syzkaller login: [ 76.150311][ T9827] IPVS: ftp: loaded support on port[0] = 21 [ 76.192067][ T9827] chnl_net:caif_netlink_parms(): no params data found [ 76.213403][ T9827] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.220729][ T9827] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.230629][ T9827] device bridge_slave_0 entered promiscuous mode [ 76.237922][ T9827] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.245236][ T9827] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.253009][ T9827] device bridge_slave_1 entered promiscuous mode [ 76.266998][ T9827] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.277877][ T9827] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.294856][ T9827] team0: Port device team_slave_0 added [ 76.301748][ T9827] team0: Port device team_slave_1 added [ 76.353054][ T9827] device hsr_slave_0 entered promiscuous mode [ 76.421540][ T9827] device hsr_slave_1 entered promiscuous mode [ 76.506857][ T9827] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.513969][ T9827] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.521342][ T9827] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.528649][ T9827] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.553729][ T9827] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.566013][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.574899][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.583747][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.591693][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.601866][ T9827] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.622960][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.631595][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.639056][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.657922][ T9827] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 76.669080][ T9827] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 76.681019][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.689904][ T9829] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.698236][ T9829] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.706173][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.715268][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.723628][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.732152][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.740765][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.748567][ T9829] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 76.762364][ T9827] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 181.781224][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 181.787861][ C0] rcu: 0-...!: (10500 ticks this GP) idle=90e/0/0x3 softirq=10437/10437 fqs=0 [ 181.796866][ C0] (t=10500 jiffies g=8945 q=161) [ 181.801882][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g8945 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 181.813141][ C0] rcu: RCU grace-period kthread stack dump: [ 181.819007][ C0] rcu_preempt I29688 10 2 0x80004000 [ 181.825318][ C0] Call Trace: [ 181.828634][ C0] __schedule+0x755/0x1580 [ 181.833030][ C0] ? __sched_text_start+0x8/0x8 [ 181.837862][ C0] schedule+0xd9/0x260 [ 181.841911][ C0] schedule_timeout+0x486/0xc50 [ 181.846746][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 181.851684][ C0] ? usleep_range+0x170/0x170 [ 181.856345][ C0] ? trace_hardirqs_on+0x67/0x240 [ 181.861347][ C0] ? __kasan_check_read+0x11/0x20 [ 181.866364][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 181.871889][ C0] ? swake_up_one+0x60/0x60 [ 181.876369][ C0] ? trace_hardirqs_on+0x67/0x240 [ 181.881372][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 181.886115][ C0] ? rcu_barrier+0x310/0x310 [ 181.890710][ C0] ? trace_hardirqs_on+0x67/0x240 [ 181.895722][ C0] ? __kasan_check_read+0x11/0x20 [ 181.900729][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 181.906947][ C0] ? __kthread_parkme+0x108/0x1c0 [ 181.911959][ C0] ? __kasan_check_read+0x11/0x20 [ 181.916961][ C0] kthread+0x361/0x430 [ 181.921009][ C0] ? rcu_barrier+0x310/0x310 [ 181.925580][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 181.931840][ C0] ret_from_fork+0x24/0x30 [ 181.936268][ C0] NMI backtrace for cpu 0 [ 181.940580][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0 [ 181.947676][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 181.957715][ C0] Call Trace: [ 181.960981][ C0] [ 181.963833][ C0] dump_stack+0x172/0x1f0 [ 181.968148][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 181.973501][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 181.979736][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 181.985362][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 181.991423][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 181.997299][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 182.002406][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 182.007935][ C0] ? raise_softirq+0x138/0x340 [ 182.012859][ C0] update_process_times+0x32/0x80 [ 182.017864][ C0] tick_sched_handle+0xa2/0x190 [ 182.022694][ C0] tick_sched_timer+0x53/0x140 [ 182.027439][ C0] __hrtimer_run_queues+0x364/0xe40 [ 182.032952][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 182.038234][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 182.043768][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 182.049568][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 182.055617][ C0] hrtimer_interrupt+0x314/0x770 [ 182.060562][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 182.066104][ C0] apic_timer_interrupt+0xf/0x20 [ 182.071026][ C0] RIP: 0010:hhf_dequeue+0x61a/0xa20 [ 182.076218][ 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 [ 182.095803][ C0] RSP: 0018:ffff8880ae809538 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 182.104285][ C0] RAX: 1ffff110137d82a7 RBX: ffff88809bec1538 RCX: ffffffff85c66051 [ 182.112236][ C0] RDX: 1ffff110137d82bb RSI: ffffffff85c6605b RDI: ffff88809bec15d8 [ 182.120201][ C0] RBP: ffff8880ae809588 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 182.128155][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 182.136116][ C0] R13: ffff88809bec1240 R14: ffff88809bec15d0 R15: ffff88809bec15d0 [ 182.144102][ C0] ? apic_timer_interrupt+0xa/0x20 [ 182.149195][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 182.153853][ C0] ? hhf_dequeue+0x5db/0xa20 [ 182.158425][ C0] ? hhf_dequeue+0x5db/0xa20 [ 182.162999][ C0] __qdisc_run+0x1e7/0x19d0 [ 182.167610][ C0] ? dev_queue_xmit+0x18/0x20 [ 182.172277][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 182.177288][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 182.182388][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 182.187658][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 182.193012][ C0] ? __kasan_check_read+0x11/0x20 [ 182.198019][ C0] ? lock_downgrade+0x920/0x920 [ 182.203042][ C0] dev_queue_xmit+0x18/0x20 [ 182.207538][ C0] ? dev_queue_xmit+0x18/0x20 [ 182.212200][ C0] neigh_resolve_output+0x5a5/0x970 [ 182.217479][ C0] ip6_finish_output2+0x1034/0x2520 [ 182.222657][ C0] ? ip6_forward_finish+0x530/0x530 [ 182.227837][ C0] ? ip6_mtu+0x16f/0x460 [ 182.232064][ C0] __ip6_finish_output+0x444/0xa50 [ 182.237154][ C0] ? __ip6_finish_output+0x444/0xa50 [ 182.242419][ C0] ip6_finish_output+0x38/0x1f0 [ 182.247250][ C0] ip6_output+0x235/0x7c0 [ 182.251573][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 182.256666][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 182.261931][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 182.266851][ C0] mld_sendpack+0x9c7/0xea0 [ 182.271360][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 182.276629][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 182.281981][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 182.287335][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 182.292516][ C0] call_timer_fn+0x1ac/0x780 [ 182.297180][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 182.302533][ C0] ? msleep_interruptible+0x150/0x150 [ 182.307917][ C0] ? trace_hardirqs_on+0x67/0x240 [ 182.312921][ C0] ? __kasan_check_read+0x11/0x20 [ 182.317924][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 182.323283][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 182.328637][ C0] run_timer_softirq+0x697/0x17a0 [ 182.333651][ C0] ? add_timer+0x930/0x930 [ 182.338045][ C0] ? kvm_clock_read+0x18/0x30 [ 182.342712][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 182.347802][ C0] ? sched_clock+0x2e/0x50 [ 182.352197][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 182.357031][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.363265][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.369488][ C0] __do_softirq+0x262/0x98c [ 182.373975][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 182.378811][ C0] irq_exit+0x19b/0x1e0 [ 182.382948][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 182.388474][ C0] apic_timer_interrupt+0xf/0x20 [ 182.393385][ C0] [ 182.396305][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 182.401657][ C0] Code: b8 73 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 1b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 1b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 33 22 fa e8 b9 [ 182.421414][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 182.429810][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee [ 182.437761][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f18e RDI: ffffffff873e050c [ 182.445737][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 182.453688][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 182.462766][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000 [ 182.470728][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 182.475733][ C0] ? default_idle+0x1c/0x360 [ 182.480304][ C0] ? default_idle+0x4e/0x360 [ 182.484876][ C0] arch_cpu_idle+0xa/0x10 [ 182.489184][ C0] default_idle_call+0x84/0xb0 [ 182.493931][ C0] do_idle+0x413/0x760 [ 182.497982][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 182.503015][ C0] ? trace_hardirqs_on+0x67/0x240 [ 182.508023][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.514247][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 182.519701][ C0] cpu_startup_entry+0x1b/0x20 [ 182.524449][ C0] rest_init+0x245/0x37b [ 182.528684][ C0] arch_call_rest_init+0xe/0x1b [ 182.533515][ C0] start_kernel+0x912/0x951 [ 182.538006][ C0] ? mem_encrypt_init+0xb/0xb [ 182.542843][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 182.549067][ C0] ? x86_family+0x41/0x50 [ 182.553385][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 182.559605][ C0] x86_64_start_reservations+0x29/0x2b [ 182.565145][ C0] x86_64_start_kernel+0x77/0x7b [ 182.570256][ C0] secondary_startup_64+0xa4/0xb0