[ 37.205916] audit: type=1800 audit(1567893486.179:32): pid=7405 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.016395] audit: type=1800 audit(1567893487.039:33): pid=7405 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.38' (ECDSA) to the list of known hosts. syzkaller login: [ 342.483138] kauditd_printk_skb: 2 callbacks suppressed [ 342.483154] audit: type=1400 audit(1567893791.499:36): avc: denied { map } for pid=7591 comm="syz-executor150" path="/root/syz-executor150714308" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 342.510375] IPVS: ftp: loaded support on port[0] = 21 [ 342.580293] chnl_net:caif_netlink_parms(): no params data found [ 342.613563] bridge0: port 1(bridge_slave_0) entered blocking state [ 342.620591] bridge0: port 1(bridge_slave_0) entered disabled state [ 342.628041] device bridge_slave_0 entered promiscuous mode [ 342.636218] bridge0: port 2(bridge_slave_1) entered blocking state [ 342.642620] bridge0: port 2(bridge_slave_1) entered disabled state [ 342.649804] device bridge_slave_1 entered promiscuous mode [ 342.665945] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 342.675067] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 342.691871] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 342.699610] team0: Port device team_slave_0 added [ 342.705430] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 342.712761] team0: Port device team_slave_1 added [ 342.719431] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 342.726735] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 342.806958] device hsr_slave_0 entered promiscuous mode [ 342.875848] device hsr_slave_1 entered promiscuous mode [ 342.945367] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 342.952430] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 342.967015] bridge0: port 2(bridge_slave_1) entered blocking state [ 342.973444] bridge0: port 2(bridge_slave_1) entered forwarding state [ 342.980533] bridge0: port 1(bridge_slave_0) entered blocking state [ 342.986953] bridge0: port 1(bridge_slave_0) entered forwarding state [ 343.018214] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 343.024591] 8021q: adding VLAN 0 to HW filter on device bond0 [ 343.033716] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 343.043023] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 343.062737] bridge0: port 1(bridge_slave_0) entered disabled state [ 343.071141] bridge0: port 2(bridge_slave_1) entered disabled state [ 343.079344] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 343.089904] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 343.096167] 8021q: adding VLAN 0 to HW filter on device team0 [ 343.105849] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 343.114037] bridge0: port 1(bridge_slave_0) entered blocking state [ 343.120493] bridge0: port 1(bridge_slave_0) entered forwarding state [ 343.135490] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 343.143185] bridge0: port 2(bridge_slave_1) entered blocking state [ 343.149618] bridge0: port 2(bridge_slave_1) entered forwarding state [ 343.161083] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 343.169929] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 343.186239] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 343.193987] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 343.202697] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 343.212880] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready executing program [ 343.220055] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 343.233319] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 343.243432] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 448.314665] rcu: INFO: rcu_preempt self-detected stall on CPU [ 448.320743] rcu: 1-....: (10500 ticks this GP) idle=622/1/0x4000000000000002 softirq=14457/14457 fqs=5250 [ 448.330845] rcu: (t=10502 jiffies g=5325 q=43) [ 448.335605] NMI backtrace for cpu 1 [ 448.339220] CPU: 1 PID: 7596 Comm: kworker/1:1 Not tainted 4.19.71 #0 [ 448.345791] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 448.355296] Workqueue: ipv6_addrconf addrconf_dad_work [ 448.360582] Call Trace: [ 448.363159] [ 448.365361] dump_stack+0x172/0x1f0 [ 448.369055] nmi_cpu_backtrace.cold+0x63/0xa4 [ 448.373715] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 448.378654] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 448.383960] arch_trigger_cpumask_backtrace+0x14/0x20 [ 448.389219] rcu_dump_cpu_stacks+0x189/0x1d5 [ 448.393627] rcu_check_callbacks.cold+0x5e3/0xd90 [ 448.398501] ? trace_hardirqs_off+0x62/0x220 [ 448.402933] update_process_times+0x32/0x80 [ 448.407442] tick_sched_handle+0xa2/0x190 [ 448.411585] tick_sched_timer+0x47/0x130 [ 448.415639] __hrtimer_run_queues+0x33b/0xdc0 [ 448.420212] ? tick_sched_do_timer+0x1b0/0x1b0 [ 448.424791] ? hrtimer_fixup_activate+0x30/0x30 [ 448.429484] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 448.434518] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 448.439875] hrtimer_interrupt+0x314/0x770 [ 448.444161] smp_apic_timer_interrupt+0x111/0x550 [ 448.448996] apic_timer_interrupt+0xf/0x20 [ 448.453223] [ 448.455452] RIP: 0010:write_comp_data+0x10/0x70 [ 448.460112] Code: 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 ee 01 00 65 8b 05 e0 86 96 7e 00 01 1f 00 75 51 41 8b 80 d0 12 00 00 83 f8 03 75 45 49 8b 80 [ 448.479785] RSP: 0018:ffff888081576de0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 448.487489] RAX: 0000000000000601 RBX: ffff888098303df8 RCX: ffffffff858e8986 [ 448.494834] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 [ 448.502288] RBP: ffff888081576de8 R08: ffff8880a44ac280 R09: 0000000000000009 [ 448.509628] R10: ffff8880a44acc68 R11: 000000009941dddb R12: dffffc0000000000 [ 448.517024] R13: ffff888098303b40 R14: 0000000000000001 R15: 0000000000000000 [ 448.524381] ? hhf_dequeue+0x5b6/0xa00 [ 448.528271] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 448.533814] hhf_dequeue+0x5b6/0xa00 [ 448.537567] __qdisc_run+0x1e7/0x1960 [ 448.541408] __dev_queue_xmit+0x165c/0x2fe0 [ 448.545739] ? netdev_pick_tx+0x300/0x300 [ 448.549891] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 448.555457] ? br_nf_post_routing+0x780/0x12f0 [ 448.560056] ? br_forward_finish+0x235/0x400 [ 448.564574] ? find_held_lock+0x35/0x130 [ 448.568637] ? br_forward_finish+0x235/0x400 [ 448.573042] dev_queue_xmit+0x18/0x20 [ 448.576833] ? dev_queue_xmit+0x18/0x20 [ 448.580797] br_dev_queue_push_xmit+0x405/0x5d0 [ 448.585485] ? kasan_check_read+0x11/0x20 [ 448.589626] br_forward_finish+0xfa/0x400 [ 448.593767] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 448.598608] ? br_fdb_add.cold+0x8a/0x8a [ 448.602658] ? kasan_check_read+0x11/0x20 [ 448.606799] __br_forward+0x647/0xb30 [ 448.610677] ? br_forward_finish+0x400/0x400 [ 448.615287] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 448.620144] deliver_clone+0x61/0xc0 [ 448.623872] br_flood+0x4da/0x710 [ 448.627335] br_dev_xmit+0xeeb/0x1490 [ 448.631156] ? br_poll_controller+0x10/0x10 [ 448.635906] ? __lock_is_held+0xb6/0x140 [ 448.639968] dev_hard_start_xmit+0x1a5/0x980 [ 448.644443] ? check_preemption_disabled+0x48/0x290 [ 448.649477] __dev_queue_xmit+0x2704/0x2fe0 [ 448.653819] ? netdev_pick_tx+0x300/0x300 [ 448.657996] ? ip6_finish_output2+0xac0/0x2550 [ 448.662568] ? find_held_lock+0x35/0x130 [ 448.666618] ? ip6_finish_output2+0xb7f/0x2550 [ 448.671237] ? mark_held_locks+0xb1/0x100 [ 448.675414] dev_queue_xmit+0x18/0x20 [ 448.679297] ? dev_queue_xmit+0x18/0x20 [ 448.683323] neigh_resolve_output+0x5b7/0x980 [ 448.687820] ip6_finish_output2+0xb7f/0x2550 [ 448.692218] ? find_held_lock+0x35/0x130 [ 448.696393] ? ip6_mtu+0x2e6/0x460 [ 448.700052] ? ip6_forward_finish+0x4d0/0x4d0 [ 448.704557] ? lock_downgrade+0x810/0x810 [ 448.708802] ? kasan_check_read+0x11/0x20 [ 448.712954] ip6_finish_output+0x574/0xbe0 [ 448.717187] ? ip6_finish_output+0x574/0xbe0 [ 448.721684] ip6_output+0x235/0x7c0 [ 448.725303] ? ip6_finish_output+0xbe0/0xbe0 [ 448.729741] ? ip6_fragment+0x3770/0x3770 [ 448.733892] ndisc_send_skb+0xf3b/0x1460 [ 448.738053] ? nf_hook.constprop.0+0x560/0x560 [ 448.742729] ? skb_set_owner_w+0x24c/0x360 [ 448.746963] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 448.751978] ndisc_send_ns+0x3a9/0x850 [ 448.755861] ? mark_held_locks+0xb1/0x100 [ 448.760002] ? ndisc_netdev_event+0x470/0x470 [ 448.764719] ? lockdep_hardirqs_on+0x415/0x5d0 [ 448.769295] ? addrconf_dad_work+0xac4/0x1150 [ 448.773777] ? trace_hardirqs_on+0x67/0x220 [ 448.778181] ? addrconf_dad_work+0xac4/0x1150 [ 448.782676] addrconf_dad_work+0xb88/0x1150 [ 448.786996] ? addrconf_dad_completed+0xbb0/0xbb0 [ 448.791893] process_one_work+0x989/0x1750 [ 448.796215] ? pwq_dec_nr_in_flight+0x320/0x320 [ 448.800867] ? lock_acquire+0x16f/0x3f0 [ 448.804831] ? kasan_check_write+0x14/0x20 [ 448.809056] ? do_raw_spin_lock+0xc8/0x240 [ 448.813281] worker_thread+0x98/0xe40 [ 448.817183] ? trace_hardirqs_on+0x67/0x220 [ 448.821510] kthread+0x354/0x420 [ 448.824877] ? process_one_work+0x1750/0x1750 [ 448.829366] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 448.835246] ret_from_fork+0x24/0x30