[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c.
[ 65.236222][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 65.236232][ T26] audit: type=1800 audit(1568438671.927:29): pid=9623 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
[ 65.270603][ T26] audit: type=1800 audit(1568438671.927:30): pid=9623 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 '10.128.1.49' (ECDSA) to the list of known hosts.
syzkaller login: [ 339.424487][ T9776] IPVS: ftp: loaded support on port[0] = 21
[ 339.474263][ T9776] chnl_net:caif_netlink_parms(): no params data found
[ 339.495647][ T9776] bridge0: port 1(bridge_slave_0) entered blocking state
[ 339.503333][ T9776] bridge0: port 1(bridge_slave_0) entered disabled state
[ 339.511085][ T9776] device bridge_slave_0 entered promiscuous mode
[ 339.518398][ T9776] bridge0: port 2(bridge_slave_1) entered blocking state
[ 339.526028][ T9776] bridge0: port 2(bridge_slave_1) entered disabled state
[ 339.533529][ T9776] device bridge_slave_1 entered promiscuous mode
[ 339.547110][ T9776] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 339.557400][ T9776] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 339.573195][ T9776] team0: Port device team_slave_0 added
[ 339.580004][ T9776] team0: Port device team_slave_1 added
[ 339.657486][ T9776] device hsr_slave_0 entered promiscuous mode
[ 339.706202][ T9776] device hsr_slave_1 entered promiscuous mode
[ 339.760887][ T9776] bridge0: port 2(bridge_slave_1) entered blocking state
[ 339.767961][ T9776] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 339.775364][ T9776] bridge0: port 1(bridge_slave_0) entered blocking state
[ 339.782454][ T9776] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 339.804965][ T9776] 8021q: adding VLAN 0 to HW filter on device bond0
[ 339.816705][ T9780] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 339.824752][ T9780] bridge0: port 1(bridge_slave_0) entered disabled state
[ 339.832421][ T9780] bridge0: port 2(bridge_slave_1) entered disabled state
[ 339.840319][ T9780] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 339.850956][ T9776] 8021q: adding VLAN 0 to HW filter on device team0
[ 339.859833][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 339.868307][ T22] bridge0: port 1(bridge_slave_0) entered blocking state
[ 339.875338][ T22] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 339.886440][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 339.894719][ T3024] bridge0: port 2(bridge_slave_1) entered blocking state
[ 339.901773][ T3024] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 339.913842][ T9778] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
[ 339.922566][ T9778] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 339.932245][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 339.942925][ T9778] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 339.952987][ T3024] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
executing program
[ 339.963770][ T9776] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 339.978687][ T9776] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 445.115774][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 445.122413][ C0] rcu: 0-...!: (10500 ticks this GP) idle=822/0/0x3 softirq=9756/9756 fqs=0
[ 445.131236][ C0] (t=10501 jiffies g=8897 q=58)
[ 445.136240][ C0] rcu: rcu_preempt kthread starved for 10502 jiffies! g8897 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 445.147486][ C0] rcu: RCU grace-period kthread stack dump:
[ 445.153878][ C0] rcu_preempt I29520 10 2 0x80004000
[ 445.160203][ C0] Call Trace:
[ 445.163772][ C0] __schedule+0x755/0x1580
[ 445.168190][ C0] ? __sched_text_start+0x8/0x8
[ 445.173021][ C0] schedule+0xd9/0x260
[ 445.177070][ C0] schedule_timeout+0x486/0xc50
[ 445.181951][ C0] ? rwlock_bug.part.0+0x90/0x90
[ 445.186875][ C0] ? usleep_range+0x170/0x170
[ 445.191567][ C0] ? trace_hardirqs_on+0x67/0x240
[ 445.196729][ C0] ? __kasan_check_read+0x11/0x20
[ 445.201866][ C0] ? __next_timer_interrupt+0x1a0/0x1a0
[ 445.207417][ C0] ? swake_up_one+0x60/0x60
[ 445.211899][ C0] ? trace_hardirqs_on+0x67/0x240
[ 445.216926][ C0] rcu_gp_kthread+0x9b2/0x18c0
[ 445.221695][ C0] ? rcu_barrier+0x310/0x310
[ 445.226266][ C0] ? trace_hardirqs_on+0x67/0x240
[ 445.231274][ C0] ? __kasan_check_read+0x11/0x20
[ 445.236359][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 445.242607][ C0] ? __kthread_parkme+0x108/0x1c0
[ 445.247613][ C0] ? __kasan_check_read+0x11/0x20
[ 445.252619][ C0] kthread+0x361/0x430
[ 445.256667][ C0] ? rcu_barrier+0x310/0x310
[ 445.261238][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 445.267459][ C0] ret_from_fork+0x24/0x30
[ 445.271891][ C0] NMI backtrace for cpu 0
[ 445.276288][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0
[ 445.283370][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 445.293662][ C0] Call Trace:
[ 445.296937][ C0]
[ 445.299819][ C0] dump_stack+0x172/0x1f0
[ 445.304141][ C0] nmi_cpu_backtrace.cold+0x70/0xb2
[ 445.309321][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 445.315577][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 445.321208][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 445.327253][ C0] arch_trigger_cpumask_backtrace+0x14/0x20
[ 445.333136][ C0] rcu_dump_cpu_stacks+0x183/0x1cf
[ 445.340057][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 445.345640][ C0] ? raise_softirq+0x138/0x340
[ 445.350389][ C0] update_process_times+0x32/0x80
[ 445.355417][ C0] tick_sched_handle+0xa2/0x190
[ 445.360259][ C0] tick_sched_timer+0x53/0x140
[ 445.365005][ C0] __hrtimer_run_queues+0x364/0xe40
[ 445.370183][ C0] ? tick_sched_do_timer+0x1b0/0x1b0
[ 445.375475][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 445.381009][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 445.386710][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 445.392859][ C0] hrtimer_interrupt+0x314/0x770
[ 445.397829][ C0] smp_apic_timer_interrupt+0x160/0x610
[ 445.403366][ C0] apic_timer_interrupt+0xf/0x20
[ 445.408345][ C0] RIP: 0010:__list_del_entry_valid+0x26/0xf5
[ 445.414309][ C0] Code: 75 e8 eb b2 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 49 89 fe 48 83 c7 08 48 89 fa 41 55 48 c1 ea 03 41 54 80 3c 02 00 <0f> 85 a1 00 00 00 4c 89 f2 4d 8b 66 08 48 b8 00 00 00 00 00 fc ff
[ 445.434268][ C0] RSP: 0018:ffff8880ae8095a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 445.442658][ C0] RAX: dffffc0000000000 RBX: ffff88809acf10b8 RCX: ffffffff85c66b39
[ 445.450615][ C0] RDX: 1ffff1101359e218 RSI: ffffffff85c67006 RDI: ffff88809acf10c0
[ 445.458567][ C0] RBP: ffff8880ae8095b8 R08: ffffffff88c7a1c0 R09: 0000000000000000
[ 445.466528][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000
[ 445.474493][ C0] R13: ffff88809acf0dc0 R14: ffff88809acf10b8 R15: 0000000000000000
[ 445.482454][ C0] ? apic_timer_interrupt+0xa/0x20
[ 445.487623][ C0] ? hhf_dequeue+0xb9/0xa20
[ 445.492107][ C0] ? hhf_dequeue+0x586/0xa20
[ 445.496692][ C0] hhf_dequeue+0x5c5/0xa20
[ 445.501296][ C0] __qdisc_run+0x1e7/0x19d0
[ 445.505853][ C0] ? dev_queue_xmit+0x18/0x20
[ 445.510617][ C0] __dev_queue_xmit+0x16f1/0x3650
[ 445.515637][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 445.520966][ C0] ? __ip6_finish_output+0x444/0xa50
[ 445.526263][ C0] ? ipv6_chk_mcast_addr+0x315/0x6f0
[ 445.531532][ C0] ? lock_downgrade+0x920/0x920
[ 445.536363][ C0] ? lock_acquire+0x190/0x410
[ 445.541037][ C0] ? __ip6_finish_output+0x444/0xa50
[ 445.546313][ C0] dev_queue_xmit+0x18/0x20
[ 445.550822][ C0] ? dev_queue_xmit+0x18/0x20
[ 445.555478][ C0] ip6_finish_output2+0xf58/0x2520
[ 445.560571][ C0] ? ip6_forward_finish+0x530/0x530
[ 445.565794][ C0] ? ip6_mtu+0x16f/0x460
[ 445.570021][ C0] __ip6_finish_output+0x444/0xa50
[ 445.575108][ C0] ? __ip6_finish_output+0x444/0xa50
[ 445.580372][ C0] ip6_finish_output+0x38/0x1f0
[ 445.585202][ C0] ip6_output+0x235/0x7c0
[ 445.589511][ C0] ? ip6_finish_output+0x1f0/0x1f0
[ 445.594599][ C0] ? __ip6_finish_output+0xa50/0xa50
[ 445.599864][ C0] ? icmp6_dst_alloc+0x432/0x660
[ 445.604868][ C0] mld_sendpack+0x9c7/0xea0
[ 445.609351][ C0] ? nf_hook.constprop.0+0x560/0x560
[ 445.614618][ C0] ? mld_ifc_timer_expire+0x437/0x8a0
[ 445.619973][ C0] ? __local_bh_enable_ip+0x15a/0x270
[ 445.625455][ C0] mld_ifc_timer_expire+0x449/0x8a0
[ 445.630671][ C0] call_timer_fn+0x1ac/0x780
[ 445.635253][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 445.640616][ C0] ? msleep_interruptible+0x150/0x150
[ 445.646749][ C0] ? trace_hardirqs_on+0x67/0x240
[ 445.651751][ C0] ? __kasan_check_read+0x11/0x20
[ 445.656774][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 445.662136][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 445.667495][ C0] run_timer_softirq+0x697/0x17a0
[ 445.672505][ C0] ? add_timer+0x930/0x930
[ 445.676959][ C0] ? kvm_clock_read+0x18/0x30
[ 445.681617][ C0] ? kvm_sched_clock_read+0x9/0x20
[ 445.686742][ C0] ? sched_clock+0x2e/0x50
[ 445.691246][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 445.696086][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 445.702312][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 445.708536][ C0] __do_softirq+0x262/0x98c
[ 445.713028][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 445.717864][ C0] irq_exit+0x19b/0x1e0
[ 445.722011][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 445.727710][ C0] apic_timer_interrupt+0xf/0x20
[ 445.732621][ C0]
[ 445.735539][ C0] RIP: 0010:native_safe_halt+0xe/0x10
[ 445.740892][ C0] Code: 88 63 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 0b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 0b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 2e 23 22 fa e8 f9
[ 445.760476][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
[ 445.768867][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee
[ 445.776829][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f15e RDI: ffffffff873e150c
[ 445.784782][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439
[ 445.792741][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000
[ 445.800777][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000
[ 445.808738][ C0] ? trace_hardirqs_on+0x5e/0x240
[ 445.813760][ C0] ? default_idle+0x1c/0x360
[ 445.818338][ C0] ? default_idle+0x4e/0x360
[ 445.822910][ C0] arch_cpu_idle+0xa/0x10
[ 445.827218][ C0] default_idle_call+0x84/0xb0
[ 445.832051][ C0] do_idle+0x413/0x760
[ 445.836115][ C0] ? arch_cpu_idle_exit+0x80/0x80
[ 445.841127][ C0] ? trace_hardirqs_on+0x67/0x240
[ 445.846146][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 445.852369][ C0] ? debug_smp_processor_id+0x3c/0x214
[ 445.857808][ C0] cpu_startup_entry+0x1b/0x20
[ 445.862551][ C0] rest_init+0x245/0x37b
[ 445.866871][ C0] arch_call_rest_init+0xe/0x1b
[ 445.871703][ C0] start_kernel+0x912/0x951
[ 445.876190][ C0] ? mem_encrypt_init+0xb/0xb
[ 445.880850][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 445.887083][ C0] ? x86_family+0x41/0x50
[ 445.891404][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 445.897642][ C0] x86_64_start_reservations+0x29/0x2b
[ 445.903091][ C0] x86_64_start_kernel+0x77/0x7b
[ 445.908083][ C0] secondary_startup_64+0xa4/0xb0