[....] 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. [ 65.161128][ T26] kauditd_printk_skb: 7 callbacks suppressed [ 65.161139][ T26] audit: type=1800 audit(1568384590.317:29): pid=9625 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 [ 65.187517][ T26] audit: type=1800 audit(1568384590.317:30): pid=9625 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 '10.128.0.71' (ECDSA) to the list of known hosts. syzkaller login: [ 155.255015][ T9777] IPVS: ftp: loaded support on port[0] = 21 [ 155.295086][ T9777] chnl_net:caif_netlink_parms(): no params data found [ 155.318464][ T9777] bridge0: port 1(bridge_slave_0) entered blocking state [ 155.325543][ T9777] bridge0: port 1(bridge_slave_0) entered disabled state [ 155.333086][ T9777] device bridge_slave_0 entered promiscuous mode [ 155.340266][ T9777] bridge0: port 2(bridge_slave_1) entered blocking state [ 155.347367][ T9777] bridge0: port 2(bridge_slave_1) entered disabled state [ 155.354789][ T9777] device bridge_slave_1 entered promiscuous mode [ 155.368536][ T9777] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 155.378567][ T9777] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 155.393410][ T9777] team0: Port device team_slave_0 added [ 155.400217][ T9777] team0: Port device team_slave_1 added [ 155.447466][ T9777] device hsr_slave_0 entered promiscuous mode [ 155.516067][ T9777] device hsr_slave_1 entered promiscuous mode [ 155.570736][ T9777] bridge0: port 2(bridge_slave_1) entered blocking state [ 155.577821][ T9777] bridge0: port 2(bridge_slave_1) entered forwarding state [ 155.585120][ T9777] bridge0: port 1(bridge_slave_0) entered blocking state [ 155.592185][ T9777] bridge0: port 1(bridge_slave_0) entered forwarding state [ 155.616161][ T9777] 8021q: adding VLAN 0 to HW filter on device bond0 [ 155.625723][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 155.634951][ T5] bridge0: port 1(bridge_slave_0) entered disabled state [ 155.642690][ T5] bridge0: port 2(bridge_slave_1) entered disabled state [ 155.650193][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 155.660069][ T9777] 8021q: adding VLAN 0 to HW filter on device team0 [ 155.668792][ T3013] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 155.677200][ T3013] bridge0: port 1(bridge_slave_0) entered blocking state [ 155.684236][ T3013] bridge0: port 1(bridge_slave_0) entered forwarding state [ 155.702899][ T9777] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 155.713333][ T9777] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 155.724896][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 155.733549][ T5] bridge0: port 2(bridge_slave_1) entered blocking state [ 155.740631][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state [ 155.748636][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 155.756958][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready executing program [ 155.765074][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 155.773316][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 155.786527][ T9777] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 155.794108][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 155.802115][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 260.835760][ C0] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 260.842756][ C0] (detected by 0, t=10502 jiffies, g=9061, q=61) [ 260.849162][ C0] rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294963229-4294952726), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 260.862502][ C0] swapper/0 R running task 28456 0 0 0x80004008 [ 260.870399][ C0] Call Trace: [ 260.873665][ C0] [ 260.876508][ C0] sched_show_task.cold+0x2ed/0x34e [ 260.881697][ C0] rcu_sched_clock_irq.cold+0xac8/0xc13 [ 260.887225][ C0] update_process_times+0x32/0x80 [ 260.892227][ C0] tick_sched_handle+0xa2/0x190 [ 260.897059][ C0] tick_sched_timer+0x53/0x140 [ 260.901804][ C0] __hrtimer_run_queues+0x364/0xe40 [ 260.906992][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 260.912262][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 260.917788][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 260.923501][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 260.929661][ C0] hrtimer_interrupt+0x314/0x770 [ 260.934605][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 260.940242][ C0] apic_timer_interrupt+0xf/0x20 [ 260.945165][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 [ 260.951481][ C0] Code: 90 f0 12 00 00 83 fa 02 75 20 48 8b 88 f8 12 00 00 8b 80 f4 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 65 4c 8b 04 25 40 fe 01 00 65 8b 05 78 88 8f 7e a9 [ 260.971068][ C0] RSP: 0018:ffff8880ae809528 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 [ 260.979464][ C0] RAX: ffffffff88c7a1c0 RBX: ffff8880a061f538 RCX: ffffffff85c660f9 [ 260.987415][ C0] RDX: 0000000000000100 RSI: ffffffff85c65ad1 RDI: ffff8880a061f540 [ 260.995366][ C0] RBP: ffff8880ae809528 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 261.003326][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 261.011287][ C0] R13: ffff8880a061f240 R14: ffff8880a061f5d8 R15: ffff8880a061f5d0 [ 261.019248][ C0] ? apic_timer_interrupt+0xa/0x20 [ 261.024342][ C0] ? hhf_dequeue+0x679/0xa20 [ 261.028912][ C0] ? hhf_dequeue+0x51/0xa20 [ 261.033397][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 261.039633][ C0] hhf_dequeue+0x51/0xa20 [ 261.043947][ C0] __qdisc_run+0x1e7/0x19d0 [ 261.048443][ C0] ? dev_queue_xmit+0x18/0x20 [ 261.053634][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 261.058637][ C0] ? ndisc_constructor+0x1a5/0xb40 [ 261.063749][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 261.069027][ C0] ? ip6_finish_output2+0x1034/0x2520 [ 261.074376][ C0] ? __kasan_check_read+0x11/0x20 [ 261.079400][ C0] ? lock_downgrade+0x920/0x920 [ 261.084255][ C0] dev_queue_xmit+0x18/0x20 [ 261.088744][ C0] ? dev_queue_xmit+0x18/0x20 [ 261.093412][ C0] neigh_resolve_output+0x5a5/0x970 [ 261.098597][ C0] ip6_finish_output2+0x1034/0x2520 [ 261.103788][ C0] ? ip6_forward_finish+0x530/0x530 [ 261.108971][ C0] ? ip6_mtu+0x16f/0x460 [ 261.113196][ C0] __ip6_finish_output+0x444/0xa50 [ 261.118287][ C0] ? __ip6_finish_output+0x444/0xa50 [ 261.123746][ C0] ip6_finish_output+0x38/0x1f0 [ 261.128575][ C0] ip6_output+0x235/0x7c0 [ 261.132882][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 261.137971][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 261.143239][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 261.148340][ C0] mld_sendpack+0x9c7/0xea0 [ 261.152834][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 261.158101][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 261.163543][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 261.168910][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 261.174090][ C0] call_timer_fn+0x1ac/0x780 [ 261.178659][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 261.184014][ C0] ? msleep_interruptible+0x150/0x150 [ 261.189565][ C0] ? trace_hardirqs_on+0x67/0x240 [ 261.194569][ C0] ? __kasan_check_read+0x11/0x20 [ 261.199577][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 261.204926][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 261.210283][ C0] run_timer_softirq+0x697/0x17a0 [ 261.215289][ C0] ? add_timer+0x930/0x930 [ 261.219682][ C0] ? kvm_clock_read+0x18/0x30 [ 261.224423][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 261.229513][ C0] ? sched_clock+0x2e/0x50 [ 261.234003][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 261.239119][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 261.245342][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 261.251592][ C0] __do_softirq+0x262/0x98c [ 261.256082][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 261.260928][ C0] irq_exit+0x19b/0x1e0 [ 261.265075][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 261.270602][ C0] apic_timer_interrupt+0xf/0x20 [ 261.275521][ C0] [ 261.278443][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 261.283794][ 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 [ 261.303378][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 261.311777][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee [ 261.319740][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f18e RDI: ffffffff873e050c [ 261.327691][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 261.335646][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 261.344203][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000 [ 261.352166][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 261.357165][ C0] ? default_idle+0x1c/0x360 [ 261.361734][ C0] ? default_idle+0x4e/0x360 [ 261.366313][ C0] arch_cpu_idle+0xa/0x10 [ 261.370626][ C0] default_idle_call+0x84/0xb0 [ 261.375368][ C0] do_idle+0x413/0x760 [ 261.379418][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 261.384416][ C0] ? trace_hardirqs_on+0x67/0x240 [ 261.389419][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 261.395639][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 261.401078][ C0] cpu_startup_entry+0x1b/0x20 [ 261.405822][ C0] rest_init+0x245/0x37b [ 261.410044][ C0] arch_call_rest_init+0xe/0x1b [ 261.414870][ C0] start_kernel+0x912/0x951 [ 261.419359][ C0] ? mem_encrypt_init+0xb/0xb [ 261.424031][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 261.430338][ C0] ? x86_family+0x41/0x50 [ 261.434656][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 261.440875][ C0] x86_64_start_reservations+0x29/0x2b [ 261.446320][ C0] x86_64_start_kernel+0x77/0x7b [ 261.451239][ C0] secondary_startup_64+0xa4/0xb0 [ 261.456250][ C0] rcu: rcu_preempt kthread starved for 10564 jiffies! g9061 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 261.467322][ C0] rcu: RCU grace-period kthread stack dump: [ 261.473188][ C0] rcu_preempt R running task 29392 10 2 0x80004000 [ 261.481076][ C0] Call Trace: [ 261.484361][ C0] __schedule+0x755/0x1580 [ 261.488766][ C0] ? __sched_text_start+0x8/0x8 [ 261.493610][ C0] schedule+0xd9/0x260 [ 261.497683][ C0] schedule_timeout+0x486/0xc50 [ 261.502601][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 261.507529][ C0] ? usleep_range+0x170/0x170 [ 261.512186][ C0] ? trace_hardirqs_on+0x67/0x240 [ 261.517380][ C0] ? __kasan_check_read+0x11/0x20 [ 261.522386][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 261.527911][ C0] ? swake_up_one+0x60/0x60 [ 261.532391][ C0] ? trace_hardirqs_on+0x67/0x240 [ 261.537395][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 261.542145][ C0] ? rcu_barrier+0x310/0x310 [ 261.546712][ C0] ? trace_hardirqs_on+0x67/0x240 [ 261.551734][ C0] ? __kasan_check_read+0x11/0x20 [ 261.556747][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 261.562970][ C0] ? __kthread_parkme+0x108/0x1c0 [ 261.567979][ C0] ? __kasan_check_read+0x11/0x20 [ 261.572984][ C0] kthread+0x361/0x430 [ 261.577053][ C0] ? rcu_barrier+0x310/0x310 [ 261.581622][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 261.587842][ C0] ret_from_fork+0x24/0x30