[....] 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.
[ 64.715782][ T26] kauditd_printk_skb: 7 callbacks suppressed
[ 64.715790][ T26] audit: type=1800 audit(1568480179.604:29): pid=9563 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
[ 64.741949][ T26] audit: type=1800 audit(1568480179.604:30): pid=9563 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 '10.128.10.28' (ECDSA) to the list of known hosts.
syzkaller login: [ 231.299593][ T9717] IPVS: ftp: loaded support on port[0] = 21
[ 231.341089][ T9717] chnl_net:caif_netlink_parms(): no params data found
[ 231.363363][ T9717] bridge0: port 1(bridge_slave_0) entered blocking state
[ 231.370495][ T9717] bridge0: port 1(bridge_slave_0) entered disabled state
[ 231.377925][ T9717] device bridge_slave_0 entered promiscuous mode
[ 231.385278][ T9717] bridge0: port 2(bridge_slave_1) entered blocking state
[ 231.392413][ T9717] bridge0: port 2(bridge_slave_1) entered disabled state
[ 231.399883][ T9717] device bridge_slave_1 entered promiscuous mode
[ 231.413203][ T9717] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link
[ 231.423372][ T9717] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link
[ 231.438285][ T9717] team0: Port device team_slave_0 added
[ 231.445128][ T9717] team0: Port device team_slave_1 added
[ 231.500149][ T9717] device hsr_slave_0 entered promiscuous mode
[ 231.538865][ T9717] device hsr_slave_1 entered promiscuous mode
[ 231.584068][ T9717] bridge0: port 2(bridge_slave_1) entered blocking state
[ 231.591134][ T9717] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 231.598406][ T9717] bridge0: port 1(bridge_slave_0) entered blocking state
[ 231.605465][ T9717] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 231.628887][ T9717] 8021q: adding VLAN 0 to HW filter on device bond0
[ 231.638348][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[ 231.657840][ T5] bridge0: port 1(bridge_slave_0) entered disabled state
[ 231.665327][ T5] bridge0: port 2(bridge_slave_1) entered disabled state
[ 231.673444][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
[ 231.683035][ T9717] 8021q: adding VLAN 0 to HW filter on device team0
[ 231.691811][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready
[ 231.700169][ T23] bridge0: port 1(bridge_slave_0) entered blocking state
[ 231.707183][ T23] bridge0: port 1(bridge_slave_0) entered forwarding state
[ 231.725276][ T9717] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network
[ 231.735745][ T9717] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network
[ 231.747347][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready
[ 231.755851][ T5] bridge0: port 2(bridge_slave_1) entered blocking state
[ 231.762912][ T5] bridge0: port 2(bridge_slave_1) entered forwarding state
[ 231.770715][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready
executing program
executing program
executing program
executing program
[ 231.779728][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready
[ 231.787866][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready
[ 231.796014][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready
[ 231.804156][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready
[ 231.811701][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready
[ 231.824406][ T9717] 8021q: adding VLAN 0 to HW filter on device batadv0
[ 336.848629][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU
[ 336.855270][ C0] rcu: 0-...!: (10500 ticks this GP) idle=006/1/0x4000000000000004 softirq=8684/8684 fqs=0
[ 336.865404][ C0] (t=10500 jiffies g=8793 q=195)
[ 336.870417][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g8793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
[ 336.881661][ C0] rcu: RCU grace-period kthread stack dump:
[ 336.887526][ C0] rcu_preempt I29392 10 2 0x80004000
[ 336.893847][ C0] Call Trace:
[ 336.897193][ C0] __schedule+0x755/0x1580
[ 336.901590][ C0] ? __sched_text_start+0x8/0x8
[ 336.906423][ C0] schedule+0xd9/0x260
[ 336.910472][ C0] schedule_timeout+0x486/0xc50
[ 336.915300][ C0] ? rwlock_bug.part.0+0x90/0x90
[ 336.920213][ C0] ? usleep_range+0x170/0x170
[ 336.924866][ C0] ? trace_hardirqs_on+0x67/0x240
[ 336.929869][ C0] ? __kasan_check_read+0x11/0x20
[ 336.934962][ C0] ? __next_timer_interrupt+0x1a0/0x1a0
[ 336.940504][ C0] ? swake_up_one+0x60/0x60
[ 336.944981][ C0] ? trace_hardirqs_on+0x67/0x240
[ 336.949987][ C0] rcu_gp_kthread+0x9b2/0x18c0
[ 336.954729][ C0] ? rcu_barrier+0x310/0x310
[ 336.959296][ C0] ? trace_hardirqs_on+0x67/0x240
[ 336.964295][ C0] ? __kasan_check_read+0x11/0x20
[ 336.969314][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[ 336.975528][ C0] ? __kthread_parkme+0x108/0x1c0
[ 336.980538][ C0] ? __kasan_check_read+0x11/0x20
[ 336.985573][ C0] kthread+0x361/0x430
[ 336.989619][ C0] ? rcu_barrier+0x310/0x310
[ 336.994199][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20
[ 337.000418][ C0] ret_from_fork+0x24/0x30
[ 337.004843][ C0] NMI backtrace for cpu 0
[ 337.009205][ C0] CPU: 0 PID: 9729 Comm: syz-executor331 Not tainted 5.3.0-rc8+ #0
[ 337.017076][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 337.027117][ C0] Call Trace:
[ 337.030386][ C0]
[ 337.033248][ C0] dump_stack+0x172/0x1f0
[ 337.037558][ C0] nmi_cpu_backtrace.cold+0x70/0xb2
[ 337.042733][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 337.048953][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45
[ 337.054563][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b
[ 337.060520][ C0] arch_trigger_cpumask_backtrace+0x14/0x20
[ 337.066390][ C0] rcu_dump_cpu_stacks+0x183/0x1cf
[ 337.071481][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13
[ 337.077006][ C0] ? raise_softirq+0x138/0x340
[ 337.081750][ C0] update_process_times+0x32/0x80
[ 337.086760][ C0] tick_sched_handle+0xa2/0x190
[ 337.091590][ C0] tick_sched_timer+0x53/0x140
[ 337.096334][ C0] __hrtimer_run_queues+0x364/0xe40
[ 337.101512][ C0] ? tick_sched_do_timer+0x1b0/0x1b0
[ 337.106774][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0
[ 337.112296][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20
[ 337.117992][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440
[ 337.124035][ C0] hrtimer_interrupt+0x314/0x770
[ 337.129009][ C0] smp_apic_timer_interrupt+0x160/0x610
[ 337.134536][ C0] apic_timer_interrupt+0xf/0x20
[ 337.139450][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x0/0x20
[ 337.146194][ C0] Code: 5d c3 0f 1f 84 00 00 00 00 00 55 48 89 f2 48 89 fe bf 06 00 00 00 48 89 e5 48 8b 4d 08 e8 18 ff ff ff 5d c3 66 0f 1f 44 00 00 <55> 40 0f b6 d6 40 0f b6 f7 bf 01 00 00 00 48 89 e5 48 8b 4d 08 e8
[ 337.165785][ C0] RSP: 0000:ffff8880ae809530 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[ 337.174177][ C0] RAX: 0000000000000001 RBX: ffff88809306ec38 RCX: ffffffff85c66b39
[ 337.182126][ C0] RDX: ffff88809306ec38 RSI: 0000000000000001 RDI: 0000000000000000
[ 337.190077][ C0] RBP: ffff8880ae809588 R08: ffff8880969ea280 R09: 0000000000000000
[ 337.198048][ C0] R10: fffffbfff134afaf R11: ffff8880969ea280 R12: dffffc0000000000
[ 337.206003][ C0] R13: ffff88809306e940 R14: 0000000000000001 R15: 0000000000000000
[ 337.213957][ C0] ? apic_timer_interrupt+0xa/0x20
[ 337.219093][ C0] ? hhf_dequeue+0xb9/0xa20
[ 337.223576][ C0] ? hhf_dequeue+0x5d1/0xa20
[ 337.228194][ C0] __qdisc_run+0x1e7/0x19d0
[ 337.232701][ C0] ? dev_queue_xmit+0x18/0x20
[ 337.237356][ C0] __dev_queue_xmit+0x16f1/0x3650
[ 337.242431][ C0] ? ndisc_constructor+0x1a5/0xb40
[ 337.247524][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0
[ 337.252827][ C0] ? ip6_finish_output2+0x1034/0x2520
[ 337.258179][ C0] ? __kasan_check_read+0x11/0x20
[ 337.263185][ C0] ? lock_downgrade+0x920/0x920
[ 337.268014][ C0] dev_queue_xmit+0x18/0x20
[ 337.272493][ C0] ? dev_queue_xmit+0x18/0x20
[ 337.277214][ C0] neigh_resolve_output+0x5a5/0x970
[ 337.282407][ C0] ip6_finish_output2+0x1034/0x2520
[ 337.287605][ C0] ? ip6_mtu+0x2e6/0x460
[ 337.291845][ C0] ? ip6_forward_finish+0x530/0x530
[ 337.297026][ C0] ? ip6_mtu+0x16f/0x460
[ 337.301250][ C0] __ip6_finish_output+0x444/0xa50
[ 337.306339][ C0] ? __ip6_finish_output+0x444/0xa50
[ 337.311607][ C0] ip6_finish_output+0x38/0x1f0
[ 337.316442][ C0] ip6_output+0x235/0x7c0
[ 337.320753][ C0] ? ip6_finish_output+0x1f0/0x1f0
[ 337.325839][ C0] ? __ip6_finish_output+0xa50/0xa50
[ 337.331101][ C0] ? icmp6_dst_alloc+0x432/0x660
[ 337.336017][ C0] mld_sendpack+0x9c7/0xea0
[ 337.340511][ C0] ? nf_hook.constprop.0+0x560/0x560
[ 337.345774][ C0] ? mld_ifc_timer_expire+0x437/0x8a0
[ 337.351125][ C0] ? __local_bh_enable_ip+0x15a/0x270
[ 337.356473][ C0] mld_ifc_timer_expire+0x449/0x8a0
[ 337.361654][ C0] call_timer_fn+0x1ac/0x780
[ 337.366220][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 337.371569][ C0] ? msleep_interruptible+0x150/0x150
[ 337.376918][ C0] ? trace_hardirqs_on+0x67/0x240
[ 337.381917][ C0] ? __kasan_check_read+0x11/0x20
[ 337.386918][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 337.392268][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0
[ 337.397620][ C0] run_timer_softirq+0x697/0x17a0
[ 337.402624][ C0] ? add_timer+0x930/0x930
[ 337.407017][ C0] ? kvm_clock_read+0x18/0x30
[ 337.411670][ C0] ? kvm_sched_clock_read+0x9/0x20
[ 337.416757][ C0] ? sched_clock+0x2e/0x50
[ 337.421153][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 337.425980][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 337.432203][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 337.438422][ C0] __do_softirq+0x262/0x98c
[ 337.442921][ C0] ? sched_clock_cpu+0x1b/0x1b0
[ 337.447774][ C0] irq_exit+0x19b/0x1e0
[ 337.451922][ C0] smp_apic_timer_interrupt+0x1a3/0x610
[ 337.457450][ C0] apic_timer_interrupt+0xf/0x20
[ 337.462359][ C0]
[ 337.465286][ C0] RIP: 0010:clear_page_erms+0x7/0x10
[ 337.470573][ C0] Code: 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 48 8d 7f 40 75 d9 90 c3 0f 1f 80 00 00 00 00 b9 00 10 00 00 31 c0 aa c3 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 41 55 41 54 53
[ 337.490162][ C0] RSP: 0000:ffff88808663fb78 EFLAGS: 00010246 ORIG_RAX: ffffffffffffff13
[ 337.498554][ C0] RAX: 0000000000000000 RBX: ffff888000000000 RCX: 0000000000000f00
[ 337.506502][ C0] RDX: 1ffff11012d3d6b9 RSI: ffffffff819cc686 RDI: ffff888086207100
[ 337.514452][ C0] RBP: ffff88808663fb90 R08: ffff8880969ea280 R09: fffffbfff134afb0
[ 337.522405][ C0] R10: fffffbfff134afaf R11: ffffffff89a57d7f R12: ffff8880969ea280
[ 337.530354][ C0] R13: 0000000000000007 R14: 0000000000000000 R15: 0000000000000000
[ 337.538327][ C0] ? clear_subpage+0x16/0x110
[ 337.542986][ C0] ? clear_subpage+0x85/0x110
[ 337.547639][ C0] clear_huge_page+0xb5/0x3e0
[ 337.552298][ C0] do_huge_pmd_anonymous_page+0x776/0x1ad0
[ 337.558081][ C0] ? lockdep_init_map+0x1be/0x6d0
[ 337.563081][ C0] ? prep_transhuge_page+0xa0/0xa0
[ 337.568173][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[ 337.574403][ C0] ? percpu_counter_add_batch+0x13c/0x190
[ 337.580111][ C0] __handle_mm_fault+0x2d35/0x3f20
[ 337.585213][ C0] ? vmf_insert_mixed_mkwrite+0x40/0x40
[ 337.590736][ C0] ? __kasan_check_read+0x11/0x20
[ 337.595739][ C0] ? trace_hardirqs_on+0x67/0x240
[ 337.600750][ C0] handle_mm_fault+0x1b5/0x6b0
[ 337.605496][ C0] __do_page_fault+0x536/0xdd0
[ 337.610241][ C0] do_page_fault+0x38/0x590
[ 337.614722][ C0] page_fault+0x39/0x40
[ 337.618853][ C0] RIP: 0033:0x401a4f
[ 337.622727][ C0] Code: bf 29 00 00 00 e8 51 09 04 00 48 83 f8 ff 74 07 48 89 05 5c 16 2d 00 48 8b 05 9d 7a 0a 00 48 8b 35 4e 16 2d 00 b9 00 06 00 20 04 25 10 06 00 20 00 00 00 00 ba 33 89 00 00 bf 10 00 00 00 48
[ 337.642305][ C0] RSP: 002b:00007ffcf9266dd0 EFLAGS: 00010217
[ 337.648358][ C0] RAX: 735f656764697262 RBX: 0000000000000000 RCX: 0000000020000600
[ 337.656305][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000002
[ 337.664261][ C0] RBP: 00000000000389a4 R08: 0000000000000000 R09: 0000000000000000
[ 337.672207][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000
[ 337.680163][ C0] R13: 00000000004032f0 R14: 0000000000000000 R15: 0000000000000000