[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 55.061978][ T25] audit: type=1800 audit(1567925664.229:25): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.083944][ T25] audit: type=1800 audit(1567925664.229:26): pid=8567 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.120219][ T25] audit: type=1800 audit(1567925664.229:27): pid=8567 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 '10.128.0.209' (ECDSA) to the list of known hosts. syzkaller login: [ 327.923179][ T8719] IPVS: ftp: loaded support on port[0] = 21 [ 327.985306][ T8719] chnl_net:caif_netlink_parms(): no params data found [ 328.013265][ T8719] bridge0: port 1(bridge_slave_0) entered blocking state [ 328.020830][ T8719] bridge0: port 1(bridge_slave_0) entered disabled state [ 328.029114][ T8719] device bridge_slave_0 entered promiscuous mode [ 328.036901][ T8719] bridge0: port 2(bridge_slave_1) entered blocking state [ 328.044102][ T8719] bridge0: port 2(bridge_slave_1) entered disabled state [ 328.051750][ T8719] device bridge_slave_1 entered promiscuous mode [ 328.069155][ T8719] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 328.079955][ T8719] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 328.097890][ T8719] team0: Port device team_slave_0 added [ 328.105584][ T8719] team0: Port device team_slave_1 added [ 328.180830][ T8719] device hsr_slave_0 entered promiscuous mode [ 328.218716][ T8719] device hsr_slave_1 entered promiscuous mode [ 328.265594][ T8719] bridge0: port 2(bridge_slave_1) entered blocking state [ 328.273054][ T8719] bridge0: port 2(bridge_slave_1) entered forwarding state [ 328.280929][ T8719] bridge0: port 1(bridge_slave_0) entered blocking state [ 328.288024][ T8719] bridge0: port 1(bridge_slave_0) entered forwarding state [ 328.321274][ T8719] 8021q: adding VLAN 0 to HW filter on device bond0 [ 328.332920][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 328.343590][ T49] bridge0: port 1(bridge_slave_0) entered disabled state [ 328.352634][ T49] bridge0: port 2(bridge_slave_1) entered disabled state [ 328.360709][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 328.372807][ T8719] 8021q: adding VLAN 0 to HW filter on device team0 [ 328.382694][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 328.391785][ T3003] bridge0: port 1(bridge_slave_0) entered blocking state [ 328.398878][ T3003] bridge0: port 1(bridge_slave_0) entered forwarding state [ 328.409376][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 328.417727][ T49] bridge0: port 2(bridge_slave_1) entered blocking state [ 328.424951][ T49] bridge0: port 2(bridge_slave_1) entered forwarding state [ 328.441268][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 328.450233][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 328.462205][ T8723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 328.476381][ T8719] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 328.488813][ T8719] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 328.501188][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 328.510279][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 328.518754][ T3003] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 328.535069][ T8719] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 433.638215][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 433.644940][ C1] rcu: 1-...!: (10500 ticks this GP) idle=7e6/1/0x4000000000000002 softirq=9420/9420 fqs=0 [ 433.655291][ C1] (t=10500 jiffies g=7429 q=40) [ 433.660212][ C1] rcu: rcu_preempt kthread starved for 10500 jiffies! g7429 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 433.671614][ C1] rcu: RCU grace-period kthread stack dump: [ 433.677483][ C1] rcu_preempt I29112 10 2 0x80004000 [ 433.683810][ C1] Call Trace: [ 433.687160][ C1] __schedule+0x755/0x1580 [ 433.691573][ C1] ? __sched_text_start+0x8/0x8 [ 433.696417][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 433.702212][ C1] ? schedule_timeout+0x47c/0xc50 [ 433.707218][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 433.712488][ C1] schedule+0xd9/0x260 [ 433.716540][ C1] schedule_timeout+0x486/0xc50 [ 433.721367][ C1] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 433.727155][ C1] ? usleep_range+0x170/0x170 [ 433.731812][ C1] ? trace_hardirqs_on+0x67/0x240 [ 433.736819][ C1] ? __kasan_check_read+0x11/0x20 [ 433.741825][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 433.747353][ C1] ? swake_up_one+0x60/0x60 [ 433.751841][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 433.756588][ C1] ? rcu_barrier+0x310/0x310 [ 433.761156][ C1] ? trace_hardirqs_on+0x67/0x240 [ 433.766162][ C1] ? __kasan_check_read+0x11/0x20 [ 433.771170][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 433.777387][ C1] ? __kthread_parkme+0x108/0x1c0 [ 433.782388][ C1] ? __kasan_check_read+0x11/0x20 [ 433.787405][ C1] kthread+0x361/0x430 [ 433.791455][ C1] ? rcu_barrier+0x310/0x310 [ 433.796023][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 433.802244][ C1] ret_from_fork+0x24/0x30 [ 433.806679][ C1] NMI backtrace for cpu 1 [ 433.810993][ C1] CPU: 1 PID: 8719 Comm: syz-executor615 Not tainted 5.3.0-rc7+ #0 [ 433.818915][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 433.828946][ C1] Call Trace: [ 433.832207][ C1] [ 433.835072][ C1] dump_stack+0x172/0x1f0 [ 433.839387][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 433.844566][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 433.850799][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 433.856412][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 433.862383][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 433.868266][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 433.873361][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 433.878891][ C1] ? raise_softirq+0x138/0x340 [ 433.883647][ C1] update_process_times+0x32/0x80 [ 433.888668][ C1] tick_sched_handle+0xa2/0x190 [ 433.893499][ C1] tick_sched_timer+0x53/0x140 [ 433.898251][ C1] __hrtimer_run_queues+0x364/0xe40 [ 433.903432][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 433.908708][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 433.914240][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 433.919937][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 433.926072][ C1] hrtimer_interrupt+0x314/0x770 [ 433.931012][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 433.936674][ C1] apic_timer_interrupt+0xf/0x20 [ 433.941616][ C1] RIP: 0010:__list_del_entry_valid+0xa9/0xf5 [ 433.947590][ C1] Code: 89 e2 48 c1 ea 03 80 3c 02 00 75 53 49 8b 14 24 4c 39 f2 0f 85 99 00 00 00 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa <48> c1 ea 03 80 3c 02 00 75 24 49 8b 55 08 4c 39 f2 0f 85 aa 00 00 [ 433.967192][ C1] RSP: 0018:ffff8880ae909060 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 433.975597][ C1] RAX: dffffc0000000000 RBX: ffff8880a50cf978 RCX: ffffffff85c7dbb9 [ 433.983597][ C1] RDX: ffff8880a50cfa18 RSI: ffffffff85c7e086 RDI: ffff8880a50cfa18 [ 433.991565][ C1] RBP: ffff8880ae909078 R08: ffff8880a8aa2440 R09: fffffbfff14e9555 [ 433.999536][ C1] R10: ffff8880a8aa2de8 R11: ffff8880a8aa2440 R12: ffff8880a50cfa10 [ 434.007509][ C1] R13: ffff8880a50cfa10 R14: ffff8880a50cf978 R15: 0000000000000000 [ 434.015571][ C1] ? apic_timer_interrupt+0xa/0x20 [ 434.020740][ C1] ? hhf_dequeue+0xb9/0xa20 [ 434.025229][ C1] ? hhf_dequeue+0x586/0xa20 [ 434.029812][ C1] hhf_dequeue+0x5c5/0xa20 [ 434.034262][ C1] __qdisc_run+0x1e7/0x19d0 [ 434.038789][ C1] ? dev_queue_xmit+0x18/0x20 [ 434.043461][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 434.048481][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 434.053866][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 434.059143][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 434.065400][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 434.070714][ C1] ? br_forward_finish+0x235/0x400 [ 434.075902][ C1] ? find_held_lock+0x35/0x130 [ 434.081003][ C1] ? br_forward_finish+0x235/0x400 [ 434.086109][ C1] dev_queue_xmit+0x18/0x20 [ 434.090606][ C1] ? dev_queue_xmit+0x18/0x20 [ 434.095268][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 434.100626][ C1] ? __kasan_check_read+0x11/0x20 [ 434.105661][ C1] br_forward_finish+0xfa/0x400 [ 434.110934][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 434.116476][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 434.121229][ C1] ? __kasan_check_read+0x11/0x20 [ 434.126245][ C1] __br_forward+0x641/0xb00 [ 434.130739][ C1] ? br_forward_finish+0x400/0x400 [ 434.135937][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 434.141478][ C1] deliver_clone+0x61/0xc0 [ 434.145903][ C1] maybe_deliver+0x2c7/0x390 [ 434.150491][ C1] br_flood+0x13a/0x3d0 [ 434.154645][ C1] br_dev_xmit+0x98c/0x15a0 [ 434.159140][ C1] ? br_poll_controller+0x10/0x10 [ 434.164149][ C1] ? netif_skb_features+0x6c2/0xb90 [ 434.169336][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 434.175568][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 434.180670][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 434.185859][ C1] ? __kasan_check_read+0x11/0x20 [ 434.190886][ C1] ? __lock_acquire+0x2b42/0x4c30 [ 434.195985][ C1] ? __lock_acquire+0x8a2/0x4c30 [ 434.200916][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 434.206193][ C1] ? __kasan_check_read+0x11/0x20 [ 434.211204][ C1] ? mark_lock+0xc0/0x11e0 [ 434.215704][ C1] ? mark_held_locks+0xa4/0xf0 [ 434.220509][ C1] ? ip_finish_output2+0x13e2/0x2570 [ 434.225784][ C1] ? __ip_finish_output+0x5fc/0xb90 [ 434.231046][ C1] ? ip_finish_output2+0x13e2/0x2570 [ 434.236329][ C1] dev_queue_xmit+0x18/0x20 [ 434.240814][ C1] ? dev_queue_xmit+0x18/0x20 [ 434.245470][ C1] ip_finish_output2+0x1726/0x2570 [ 434.250615][ C1] ? nf_ct_deliver_cached_events+0x23d/0x6e0 [ 434.256591][ C1] ? ip_frag_next+0x910/0x910 [ 434.261701][ C1] __ip_finish_output+0x5fc/0xb90 [ 434.266713][ C1] ? __ip_finish_output+0x5fc/0xb90 [ 434.271978][ C1] ? audit_alloc_mark+0x3d0/0x500 [ 434.276984][ C1] ip_finish_output+0x38/0x1f0 [ 434.281736][ C1] ip_output+0x21f/0x640 [ 434.285967][ C1] ? ip_mc_output+0xf40/0xf40 [ 434.290722][ C1] ? __ip_finish_output+0xb90/0xb90 [ 434.295916][ C1] ip_local_out+0xbb/0x190 [ 434.300359][ C1] igmpv3_sendpack+0x1b5/0x2c0 [ 434.305106][ C1] igmp_ifc_timer_expire+0x687/0xa00 [ 434.310379][ C1] call_timer_fn+0x1ac/0x780 [ 434.314948][ C1] ? __ip_mc_dec_group+0x520/0x520 [ 434.320054][ C1] ? msleep_interruptible+0x150/0x150 [ 434.325414][ C1] ? run_timer_softirq+0x685/0x17a0 [ 434.330596][ C1] ? trace_hardirqs_on+0x67/0x240 [ 434.335604][ C1] ? __kasan_check_read+0x11/0x20 [ 434.340617][ C1] ? __ip_mc_dec_group+0x520/0x520 [ 434.345718][ C1] ? __ip_mc_dec_group+0x520/0x520 [ 434.350814][ C1] run_timer_softirq+0x697/0x17a0 [ 434.355823][ C1] ? add_timer+0x930/0x930 [ 434.360241][ C1] __do_softirq+0x262/0x98c [ 434.364735][ C1] ? nf_ct_iterate_cleanup+0x1f1/0x4e0 [ 434.370173][ C1] do_softirq_own_stack+0x2a/0x40 [ 434.375172][ C1] [ 434.378094][ C1] do_softirq.part.0+0x11a/0x170 [ 434.383013][ C1] __local_bh_enable_ip+0x211/0x270 [ 434.388199][ C1] nf_ct_iterate_cleanup+0x217/0x4e0 [ 434.393479][ C1] ? nf_ct_alloc_hashtable+0x150/0x150 [ 434.398935][ C1] nf_ct_iterate_cleanup_net+0x133/0x190 [ 434.404608][ C1] ? nf_nat_redirect_ipv4.cold+0x30/0x30 [ 434.410231][ C1] ? nf_ct_iterate_cleanup+0x4e0/0x4e0 [ 434.415671][ C1] ? nf_nat_redirect_ipv4.cold+0x30/0x30 [ 434.421296][ C1] masq_device_event+0xb5/0xe0 [ 434.426042][ C1] notifier_call_chain+0xc2/0x230 [ 434.431054][ C1] raw_notifier_call_chain+0x2e/0x40 [ 434.436329][ C1] call_netdevice_notifiers_info+0x3f/0x90 [ 434.442114][ C1] dev_close_many+0x33f/0x6f0 [ 434.446781][ C1] ? __kasan_check_read+0x11/0x20 [ 434.451792][ C1] ? netdev_master_upper_dev_link+0x50/0x50 [ 434.457685][ C1] rollback_registered_many+0x33f/0xdd0 [ 434.463211][ C1] ? __kasan_check_read+0x11/0x20 [ 434.468232][ C1] ? generic_xdp_install+0x3d0/0x3d0 [ 434.473513][ C1] ? mark_held_locks+0xa4/0xf0 [ 434.478272][ C1] ? queue_delayed_work_on+0xf3/0x210 [ 434.483684][ C1] ? linkwatch_schedule_work+0x190/0x1d0 [ 434.489298][ C1] ? queue_delayed_work_on+0xf3/0x210 [ 434.494653][ C1] ? lockdep_hardirqs_on+0x418/0x5d0 [ 434.499936][ C1] rollback_registered+0x109/0x1d0 [ 434.505053][ C1] ? rollback_registered_many+0xdd0/0xdd0 [ 434.510802][ C1] ? linkwatch_schedule_work+0x195/0x1d0 [ 434.516447][ C1] unregister_netdevice_queue+0x1ee/0x2c0 [ 434.522214][ C1] __tun_detach+0xd8a/0x1040 [ 434.526819][ C1] tun_chr_close+0xe0/0x180 [ 434.531306][ C1] __fput+0x2ff/0x890 [ 434.535273][ C1] ? __tun_detach+0x1040/0x1040 [ 434.540120][ C1] ____fput+0x16/0x20 [ 434.544088][ C1] task_work_run+0x145/0x1c0 [ 434.548677][ C1] do_exit+0x92f/0x2e50 [ 434.552818][ C1] ? mm_update_next_owner+0x640/0x640 [ 434.558170][ C1] ? down_read_non_owner+0x450/0x450 [ 434.563440][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 434.569748][ C1] ? handle_mm_fault+0x1d3/0x6b0 [ 434.574670][ C1] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 434.580124][ C1] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 434.585652][ C1] do_group_exit+0x135/0x360 [ 434.590487][ C1] __x64_sys_exit_group+0x44/0x50 [ 434.595491][ C1] do_syscall_64+0xfd/0x6a0 [ 434.599984][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 434.605852][ C1] RIP: 0033:0x440c68 [ 434.609740][ C1] Code: Bad RIP value. [ 434.613791][ C1] RSP: 002b:00007ffff4cdb4c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 434.622181][ C1] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440c68 [ 434.631519][ C1] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 434.639471][ C1] RBP: 00000000004c7110 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 434.647422][ C1] R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000001 [ 434.655374][ C1] R13: 00000000006d9600 R14: 0000000000000000 R15: 0000000000000000