[ 68.060297][ T26] audit: type=1800 audit(1568382900.929:31): pid=10230 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 68.082426][ T26] audit: type=1800 audit(1568382900.929:32): pid=10230 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: [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. syzkaller login: [ 329.540391][ T26] kauditd_printk_skb: 3 callbacks suppressed [ 329.540406][ T26] audit: type=1400 audit(1568383162.459:36): avc: denied { map } for pid=10422 comm="syz-executor155" path="/root/syz-executor155558262" 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 [ 329.575144][T10423] IPVS: ftp: loaded support on port[0] = 21 [ 329.617765][T10423] chnl_net:caif_netlink_parms(): no params data found [ 329.639568][T10423] bridge0: port 1(bridge_slave_0) entered blocking state [ 329.646784][T10423] bridge0: port 1(bridge_slave_0) entered disabled state [ 329.654380][T10423] device bridge_slave_0 entered promiscuous mode [ 329.662096][T10423] bridge0: port 2(bridge_slave_1) entered blocking state [ 329.669297][T10423] bridge0: port 2(bridge_slave_1) entered disabled state [ 329.676967][T10423] device bridge_slave_1 entered promiscuous mode [ 329.691618][T10423] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 329.701811][T10423] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 329.717067][T10423] team0: Port device team_slave_0 added [ 329.724001][T10423] team0: Port device team_slave_1 added [ 329.771702][T10423] device hsr_slave_0 entered promiscuous mode [ 329.839974][T10423] device hsr_slave_1 entered promiscuous mode [ 329.915877][T10423] bridge0: port 2(bridge_slave_1) entered blocking state [ 329.923692][T10423] bridge0: port 2(bridge_slave_1) entered forwarding state [ 329.931201][T10423] bridge0: port 1(bridge_slave_0) entered blocking state [ 329.938301][T10423] bridge0: port 1(bridge_slave_0) entered forwarding state [ 329.963272][T10423] 8021q: adding VLAN 0 to HW filter on device bond0 [ 329.974145][T10426] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 329.992579][T10426] bridge0: port 1(bridge_slave_0) entered disabled state [ 330.000404][T10426] bridge0: port 2(bridge_slave_1) entered disabled state [ 330.008085][T10426] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 330.018319][T10423] 8021q: adding VLAN 0 to HW filter on device team0 [ 330.027989][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 330.036908][ T5] bridge0: port 1(bridge_slave_0) entered blocking state [ 330.043987][ T5] bridge0: port 1(bridge_slave_0) entered forwarding state [ 330.060345][T10426] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 330.068686][T10426] bridge0: port 2(bridge_slave_1) entered blocking state [ 330.075764][T10426] bridge0: port 2(bridge_slave_1) entered forwarding state [ 330.084000][T10426] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 330.093665][T10428] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 330.101712][T10428] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 330.114294][T10423] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 330.124769][T10423] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 330.136045][T10428] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 330.145371][T10428] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 330.154374][ T3008] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 330.168235][T10423] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 435.189682][ C1] rcu: INFO: rcu_preempt self-detected stall on CPU [ 435.196346][ C1] rcu: 1-...!: (1 GPs behind) idle=a16/1/0x4000000000000002 softirq=11955/11956 fqs=210 [ 435.206440][ C1] (t=10500 jiffies g=10453 q=116) [ 435.211562][ C1] rcu: rcu_preempt kthread starved for 10079 jiffies! g10453 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 435.223106][ C1] rcu: RCU grace-period kthread stack dump: [ 435.229104][ C1] rcu_preempt I29112 10 2 0x80004000 [ 435.235571][ C1] Call Trace: [ 435.238957][ C1] __schedule+0x755/0x1580 [ 435.243361][ C1] ? __sched_text_start+0x8/0x8 [ 435.248418][ C1] schedule+0xd9/0x260 [ 435.252500][ C1] schedule_timeout+0x486/0xc50 [ 435.257378][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 435.262331][ C1] ? usleep_range+0x170/0x170 [ 435.267024][ C1] ? trace_hardirqs_on+0x67/0x240 [ 435.272033][ C1] ? __kasan_check_read+0x11/0x20 [ 435.277053][ C1] ? __next_timer_interrupt+0x1a0/0x1a0 [ 435.283277][ C1] ? swake_up_one+0x60/0x60 [ 435.287838][ C1] rcu_gp_kthread+0x9b2/0x18c0 [ 435.292595][ C1] ? rcu_barrier+0x310/0x310 [ 435.297168][ C1] ? trace_hardirqs_on+0x67/0x240 [ 435.302206][ C1] ? __kasan_check_read+0x11/0x20 [ 435.308524][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 435.314789][ C1] ? __kthread_parkme+0x108/0x1c0 [ 435.319804][ C1] ? __kasan_check_read+0x11/0x20 [ 435.324838][ C1] kthread+0x361/0x430 [ 435.328919][ C1] ? rcu_barrier+0x310/0x310 [ 435.333617][ C1] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 435.339862][ C1] ret_from_fork+0x24/0x30 [ 435.344444][ C1] NMI backtrace for cpu 1 [ 435.348764][ C1] CPU: 1 PID: 10423 Comm: syz-executor155 Not tainted 5.3.0-rc8+ #0 [ 435.356717][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 435.367036][ C1] Call Trace: [ 435.370594][ C1] [ 435.373585][ C1] dump_stack+0x172/0x1f0 [ 435.377962][ C1] nmi_cpu_backtrace.cold+0x70/0xb2 [ 435.383155][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 435.389760][ C1] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 435.395883][ C1] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 435.401867][ C1] arch_trigger_cpumask_backtrace+0x14/0x20 [ 435.409095][ C1] rcu_dump_cpu_stacks+0x183/0x1cf [ 435.414200][ C1] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 435.419920][ C1] ? raise_softirq+0x138/0x340 [ 435.424825][ C1] update_process_times+0x32/0x80 [ 435.429855][ C1] tick_sched_handle+0xa2/0x190 [ 435.436707][ C1] tick_sched_timer+0x53/0x140 [ 435.441464][ C1] __hrtimer_run_queues+0x364/0xe40 [ 435.446838][ C1] ? tick_sched_do_timer+0x1b0/0x1b0 [ 435.452118][ C1] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 435.457676][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 435.463696][ C1] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 435.469762][ C1] hrtimer_interrupt+0x314/0x770 [ 435.475674][ C1] smp_apic_timer_interrupt+0x160/0x610 [ 435.481240][ C1] apic_timer_interrupt+0xf/0x20 [ 435.486171][ C1] [ 435.489122][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x5/0x20 [ 435.495890][ C1] Code: c3 0f 1f 40 00 55 0f b7 d6 0f b7 f7 bf 03 00 00 00 48 89 e5 48 8b 4d 08 e8 d8 fe ff ff 5d c3 66 0f 1f 44 00 00 55 89 f2 89 fe 05 00 00 00 48 89 e5 48 8b 4d 08 e8 ba fe ff ff 5d c3 0f 1f 84 [ 435.515823][ C1] RSP: 0018:ffff8880a991f338 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 435.524247][ C1] RAX: 0000000000000000 RBX: ffff8880a0c4b538 RCX: ffffffff85c660f9 [ 435.532224][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 435.540367][ C1] RBP: ffff8880a991f398 R08: ffff8880a41c4000 R09: 0000000000000000 [ 435.548622][ C1] R10: fffffbfff134afaf R11: ffff8880a41c4000 R12: dffffc0000000000 [ 435.556742][ C1] R13: ffff8880a0c4b240 R14: ffff8880a0c4b5d0 R15: 0000000000000000 [ 435.564782][ C1] ? hhf_dequeue+0x679/0xa20 [ 435.569381][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 435.575614][ C1] ? hhf_dequeue+0xb9/0xa20 [ 435.580171][ C1] __qdisc_run+0x1e7/0x19d0 [ 435.584784][ C1] ? dev_queue_xmit+0x18/0x20 [ 435.589450][ C1] __dev_queue_xmit+0x16f1/0x3650 [ 435.594459][ C1] ? selinux_sock_rcv_skb_compat+0x330/0x330 [ 435.600476][ C1] ? netlink_sendmsg+0x8a5/0xd60 [ 435.605513][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 435.611759][ C1] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 435.617131][ C1] ? __copy_skb_header+0x2e8/0x550 [ 435.622234][ C1] ? __skb_checksum_complete+0x3f0/0x3f0 [ 435.627869][ C1] ? kasan_slab_alloc+0xf/0x20 [ 435.632618][ C1] ? __kasan_check_write+0x14/0x20 [ 435.637713][ C1] ? __skb_clone+0x5c8/0x820 [ 435.642287][ C1] dev_queue_xmit+0x18/0x20 [ 435.646802][ C1] ? dev_queue_xmit+0x18/0x20 [ 435.651471][ C1] netlink_deliver_tap+0x8e2/0xbf0 [ 435.656737][ C1] __netlink_sendskb+0x62/0xc0 [ 435.661499][ C1] netlink_unicast+0x60a/0x710 [ 435.667559][ C1] ? netlink_attachskb+0x7c0/0x7c0 [ 435.672682][ C1] netlink_ack+0x63f/0xb30 [ 435.677119][ C1] ? netlink_sendmsg+0xd60/0xd60 [ 435.682043][ C1] ? __copy_skb_header+0x250/0x550 [ 435.687159][ C1] netlink_rcv_skb+0x376/0x450 [ 435.692001][ C1] ? rtnetlink_put_metrics+0x580/0x580 [ 435.697453][ C1] ? netlink_ack+0xb30/0xb30 [ 435.702029][ C1] ? netlink_deliver_tap+0x254/0xbf0 [ 435.707343][ C1] rtnetlink_rcv+0x1d/0x30 [ 435.711755][ C1] netlink_unicast+0x531/0x710 [ 435.716648][ C1] ? netlink_attachskb+0x7c0/0x7c0 [ 435.721773][ C1] ? _copy_from_iter_full+0x25d/0x8a0 [ 435.727165][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 435.733540][ C1] netlink_sendmsg+0x8a5/0xd60 [ 435.738293][ C1] ? netlink_unicast+0x710/0x710 [ 435.743305][ C1] ? tomoyo_socket_sendmsg+0x26/0x30 [ 435.748669][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 435.754898][ C1] ? security_socket_sendmsg+0x8d/0xc0 [ 435.760359][ C1] ? netlink_unicast+0x710/0x710 [ 435.765358][ C1] sock_sendmsg+0xd7/0x130 [ 435.769936][ C1] ___sys_sendmsg+0x803/0x920 [ 435.774633][ C1] ? copy_msghdr_from_user+0x440/0x440 [ 435.780088][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 435.786331][ C1] ? tomoyo_path_number_perm+0x263/0x520 [ 435.792148][ C1] ? sock_ioctl+0x489/0x780 [ 435.796673][ C1] ? dlci_ioctl_set+0x40/0x40 [ 435.801345][ C1] ? ___might_sleep+0x163/0x280 [ 435.806181][ C1] ? dlci_ioctl_set+0x40/0x40 [ 435.810846][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 435.817069][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 435.823304][ C1] ? __fget_light+0x1a9/0x230 [ 435.827968][ C1] ? __fdget+0x1b/0x20 [ 435.832022][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 435.838516][ C1] __sys_sendmsg+0x105/0x1d0 [ 435.843094][ C1] ? __sys_sendmsg_sock+0xd0/0xd0 [ 435.848110][ C1] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 435.854165][ C1] __x64_sys_sendmsg+0x78/0xb0 [ 435.858914][ C1] do_syscall_64+0xfd/0x6a0 [ 435.863429][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 435.869304][ C1] RIP: 0033:0x441b19 [ 435.873187][ C1] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 435.893096][ C1] RSP: 002b:00007ffe82466c08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 435.901510][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441b19 [ 435.909625][ C1] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 [ 435.917713][ C1] RBP: 00007ffe82466c20 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 435.925676][ C1] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 0000000000000000 [ 435.933646][ C1] R13: 00000000004030b0 R14: 0000000000000000 R15: 0000000000000000