[ 69.650508][ T26] audit: type=1800 audit(1568425003.599:32): pid=10088 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=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 70.077085][T10153] sshd (10153) used greatest stack depth: 23480 bytes left [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.226' (ECDSA) to the list of known hosts. syzkaller login: [ 212.577664][ T26] kauditd_printk_skb: 3 callbacks suppressed [ 212.577678][ T26] audit: type=1400 audit(1568425146.609:36): avc: denied { map } for pid=10278 comm="syz-executor322" path="/root/syz-executor322905452" 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 [ 212.619070][T10279] IPVS: ftp: loaded support on port[0] = 21 [ 212.667795][T10279] chnl_net:caif_netlink_parms(): no params data found [ 212.689526][T10279] bridge0: port 1(bridge_slave_0) entered blocking state [ 212.696960][T10279] bridge0: port 1(bridge_slave_0) entered disabled state [ 212.704522][T10279] device bridge_slave_0 entered promiscuous mode [ 212.711674][T10279] bridge0: port 2(bridge_slave_1) entered blocking state [ 212.718824][T10279] bridge0: port 2(bridge_slave_1) entered disabled state [ 212.726346][T10279] device bridge_slave_1 entered promiscuous mode [ 212.739538][T10279] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 212.749994][T10279] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 212.766039][T10279] team0: Port device team_slave_0 added [ 212.772672][T10279] team0: Port device team_slave_1 added [ 212.824165][T10279] device hsr_slave_0 entered promiscuous mode [ 212.892682][T10279] device hsr_slave_1 entered promiscuous mode [ 212.948605][T10279] bridge0: port 2(bridge_slave_1) entered blocking state [ 212.955709][T10279] bridge0: port 2(bridge_slave_1) entered forwarding state [ 212.963043][T10279] bridge0: port 1(bridge_slave_0) entered blocking state [ 212.972418][T10279] bridge0: port 1(bridge_slave_0) entered forwarding state [ 212.996296][T10279] 8021q: adding VLAN 0 to HW filter on device bond0 [ 213.006577][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 213.024935][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 213.032937][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 213.040535][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 213.050938][T10279] 8021q: adding VLAN 0 to HW filter on device team0 [ 213.060363][T10281] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 213.068908][T10281] bridge0: port 1(bridge_slave_0) entered blocking state [ 213.076289][T10281] bridge0: port 1(bridge_slave_0) entered forwarding state [ 213.085842][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 213.094477][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 213.101495][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 213.121298][T10279] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 213.131753][T10279] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 213.144629][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 213.153829][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 213.162173][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 213.170710][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 213.179901][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 213.187554][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 213.201944][T10279] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 318.282370][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 318.289288][ C1] rcu: 1-...!: (1 GPs behind) idle=3de/1/0x4000000000000002 softirq=10008/10011 fqs=18 [ 318.299072][ C1] (t=10500 jiffies g=10161 q=14) [ 318.304083][ C1] rcu: rcu_preempt kthread starved for 10464 jiffies! g10161 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 318.315503][ C1] rcu: RCU grace-period kthread stack dump: [ 318.321376][ C1] rcu_preempt I29328 10 2 0x80004000 [ 318.327868][ C1] Call Trace: [ 318.331219][ C1] __schedule+0x755/0x1580 [ 318.335644][ C1] ? __sched_text_start+0x8/0x8 [ 318.340586][ C1] schedule+0xd9/0x260 [ 318.344732][ C1] schedule_timeout+0x486/0xc50 [ 318.349667][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 318.354594][ C1] ? usleep_range+0x170/0x170 [ 318.359253][ C1] ? trace_hardirqs_on+0x67/0x240 [ 318.364261][ C1] ? __kasan_check_read+0x11/0x20 [ 318.369293][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 318.374910][ C1] ? swake_up_one+0x60/0x60 [ 318.379403][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 318.384152][ C1] ? rcu_barrier+0x310/0x310 [ 318.388724][ C1] ? trace_hardirqs_on+0x67/0x240 [ 318.393732][ C1] ? __kasan_check_read+0x11/0x20 [ 318.398740][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 318.404975][ C1] ? __kthread_parkme+0x108/0x1c0 [ 318.410067][ C1] ? __kasan_check_read+0x11/0x20 [ 318.415252][ C1] kthread+0x361/0x430 [ 318.419303][ C1] ? rcu_barrier+0x310/0x310 [ 318.423881][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 318.430109][ C1] ret_from_fork+0x24/0x30 [ 318.434532][ C1] NMI backtrace for cpu 1 [ 318.438862][ C1] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.3.0-rc8+ #0 [ 318.446222][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 318.456359][ C1] Workqueue: ipv6_addrconf addrconf_dad_work [ 318.462321][ C1] Call Trace: [ 318.465590][ C1] [ 318.468457][ C1] dump_stack+0x172/0x1f0 [ 318.473033][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 318.478219][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 318.484442][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 318.490057][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 318.496108][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 318.501994][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 318.507090][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 318.512617][ C1] ? raise_softirq+0x138/0x340 [ 318.517388][ C1] update_process_times+0x32/0x80 [ 318.522398][ C1] tick_sched_handle+0xa2/0x190 [ 318.527232][ C1] tick_sched_timer+0x53/0x140 [ 318.531989][ C1] __hrtimer_run_queues+0x364/0xe40 [ 318.537170][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 318.542443][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 318.547995][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 318.553713][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 318.559763][ C1] hrtimer_interrupt+0x314/0x770 [ 318.564735][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 318.570282][ C1] apic_timer_interrupt+0xf/0x20 [ 318.575196][ C1] [ 318.578136][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x11/0x20 [ 318.585161][ C1] Code: 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 f6 fe ff ff 5d c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 [ 318.604758][ C1] RSP: 0018:ffff8880a9a5ed48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 318.613152][ C1] RAX: 0000000000000001 RBX: ffff8880a4eba338 RCX: ffffffff85c67051 [ 318.621107][ C1] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000001 [ 318.629149][ C1] RBP: ffff8880a9a5ed48 R08: ffff8880a9a4e5c0 R09: 0000000000000000 [ 318.637121][ C1] R10: fffffbfff134afaf R11: ffff8880a9a4e5c0 R12: dffffc0000000000 [ 318.645174][ C1] R13: ffff8880a4eba040 R14: ffff8880a4eba3d8 R15: ffff8880a4eba3d0 [ 318.653190][ C1] ? hhf_dequeue+0x5d1/0xa20 [ 318.657852][ C1] hhf_dequeue+0x679/0xa20 [ 318.662321][ C1] __qdisc_run+0x1e7/0x19d0 [ 318.666846][ C1] ? dev_queue_xmit+0x18/0x20 [ 318.671509][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 318.676518][ C1] ? __local_bh_enable_ip+0x15a/0x270 [ 318.681879][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 318.687150][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 318.693421][ C1] ? br_nf_post_routing+0xd73/0x1d30 [ 318.698731][ C1] ? br_forward_finish+0x235/0x400 [ 318.703914][ C1] ? __kasan_check_read+0x11/0x20 [ 318.708921][ C1] ? __dev_queue_xmit+0x2b15/0x3650 [ 318.714099][ C1] dev_queue_xmit+0x18/0x20 [ 318.718580][ C1] ? dev_queue_xmit+0x18/0x20 [ 318.723245][ C1] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 318.728660][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 318.733238][ C1] br_forward_finish+0xfa/0x400 [ 318.738096][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 318.743643][ C1] ? br_fdb_add.cold+0x8c/0x8c [ 318.748480][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 318.754187][ C1] ? nf_hook_slow+0xf0/0x1e0 [ 318.758772][ C1] __br_forward+0x641/0xb00 [ 318.763278][ C1] ? br_forward_finish+0x400/0x400 [ 318.768380][ C1] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 318.773929][ C1] deliver_clone+0x61/0xc0 [ 318.778328][ C1] maybe_deliver+0x2c7/0x390 [ 318.782902][ C1] br_flood+0x13a/0x3d0 [ 318.787102][ C1] br_dev_xmit+0x98c/0x15a0 [ 318.791599][ C1] ? br_poll_controller+0x10/0x10 [ 318.796605][ C1] ? netif_skb_features+0x6c2/0xb90 [ 318.801838][ C1] ? netdev_set_sb_channel+0xe0/0xe0 [ 318.807128][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 318.813382][ C1] ? validate_xmit_xfrm+0x43c/0xf10 [ 318.818586][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 318.823503][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 318.829728][ C1] dev_hard_start_xmit+0x1a3/0x9c0 [ 318.834822][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 318.841046][ C1] __dev_queue_xmit+0x2b15/0x3650 [ 318.846096][ C1] ? ndisc_constructor+0x1a5/0xb40 [ 318.851191][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 318.856474][ C1] ? ip6_finish_output2+0x1034/0x2520 [ 318.861841][ C1] ? __kasan_check_read+0x11/0x20 [ 318.867653][ C1] ? lock_downgrade+0x920/0x920 [ 318.872489][ C1] dev_queue_xmit+0x18/0x20 [ 318.876975][ C1] ? dev_queue_xmit+0x18/0x20 [ 318.881688][ C1] neigh_resolve_output+0x5a5/0x970 [ 318.886874][ C1] ip6_finish_output2+0x1034/0x2520 [ 318.892069][ C1] ? ip6_forward_finish+0x530/0x530 [ 318.897262][ C1] ? lock_downgrade+0x920/0x920 [ 318.902182][ C1] ? ip6_mtu+0x16f/0x460 [ 318.906413][ C1] __ip6_finish_output+0x444/0xa50 [ 318.911521][ C1] ? __ip6_finish_output+0x444/0xa50 [ 318.916790][ C1] ip6_finish_output+0x38/0x1f0 [ 318.921721][ C1] ip6_output+0x235/0x7c0 [ 318.926041][ C1] ? ip6_finish_output+0x1f0/0x1f0 [ 318.931134][ C1] ? __ip6_finish_output+0xa50/0xa50 [ 318.936426][ C1] ? ndisc_send_skb+0x803/0x1450 [ 318.941351][ C1] ndisc_send_skb+0xf29/0x1450 [ 318.946098][ C1] ? nf_hook.constprop.0+0x560/0x560 [ 318.951413][ C1] ? skb_set_owner_w+0x21b/0x320 [ 318.956334][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 318.962059][ C1] ndisc_send_ns+0x3a9/0x850 [ 318.966632][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 318.972856][ C1] ? ndisc_netdev_event+0x4e0/0x4e0 [ 318.978034][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 318.983222][ C1] ? trace_hardirqs_on+0x67/0x240 [ 318.988227][ C1] ? addrconf_dad_work+0xac4/0x1150 [ 318.993458][ C1] addrconf_dad_work+0xb88/0x1150 [ 318.998481][ C1] ? addrconf_dad_completed+0xbb0/0xbb0 [ 319.004014][ C1] ? lock_acquire+0x190/0x410 [ 319.008671][ C1] ? trace_hardirqs_on+0x67/0x240 [ 319.013707][ C1] process_one_work+0x9af/0x1740 [ 319.018632][ C1] ? pwq_dec_nr_in_flight+0x320/0x320 [ 319.023997][ C1] ? lock_acquire+0x190/0x410 [ 319.028662][ C1] worker_thread+0x98/0xe40 [ 319.033155][ C1] kthread+0x361/0x430 [ 319.037206][ C1] ? process_one_work+0x1740/0x1740 [ 319.042387][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 319.048613][ C1] ret_from_fork+0x24/0x30