[ 74.894610][ T26] audit: type=1800 audit(1568252420.125:29): pid=10347 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 74.940853][ T26] audit: type=1800 audit(1568252420.135:30): pid=10347 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.46' (ECDSA) to the list of known hosts. syzkaller login: [ 224.756132][ T26] kauditd_printk_skb: 5 callbacks suppressed [ 224.756147][ T26] audit: type=1400 audit(1568252569.995:36): avc: denied { map } for pid=10537 comm="syz-executor711" path="/root/syz-executor711899329" 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 [ 224.791223][T10538] IPVS: ftp: loaded support on port[0] = 21 [ 224.842707][T10538] chnl_net:caif_netlink_parms(): no params data found [ 224.865076][T10538] bridge0: port 1(bridge_slave_0) entered blocking state [ 224.872226][T10538] bridge0: port 1(bridge_slave_0) entered disabled state [ 224.879937][T10538] device bridge_slave_0 entered promiscuous mode [ 224.887367][T10538] bridge0: port 2(bridge_slave_1) entered blocking state [ 224.894421][T10538] bridge0: port 2(bridge_slave_1) entered disabled state [ 224.902473][T10538] device bridge_slave_1 entered promiscuous mode [ 224.917993][T10538] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 224.928355][T10538] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 224.944386][T10538] team0: Port device team_slave_0 added [ 224.951474][T10538] team0: Port device team_slave_1 added [ 225.006819][T10538] device hsr_slave_0 entered promiscuous mode [ 225.045224][T10538] device hsr_slave_1 entered promiscuous mode [ 225.120710][T10538] bridge0: port 2(bridge_slave_1) entered blocking state [ 225.127975][T10538] bridge0: port 2(bridge_slave_1) entered forwarding state [ 225.135309][T10538] bridge0: port 1(bridge_slave_0) entered blocking state [ 225.142361][T10538] bridge0: port 1(bridge_slave_0) entered forwarding state [ 225.169560][T10538] 8021q: adding VLAN 0 to HW filter on device bond0 [ 225.180662][T10540] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 225.199214][T10540] bridge0: port 1(bridge_slave_0) entered disabled state [ 225.206844][T10540] bridge0: port 2(bridge_slave_1) entered disabled state [ 225.214434][T10540] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 225.225658][T10538] 8021q: adding VLAN 0 to HW filter on device team0 [ 225.235683][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 225.244159][ T3014] bridge0: port 1(bridge_slave_0) entered blocking state [ 225.251341][ T3014] bridge0: port 1(bridge_slave_0) entered forwarding state [ 225.260281][T10540] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 225.268957][T10540] bridge0: port 2(bridge_slave_1) entered blocking state [ 225.276041][T10540] bridge0: port 2(bridge_slave_1) entered forwarding state [ 225.290640][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 225.299224][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 225.309159][T10540] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 225.321384][T10538] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 225.332492][T10538] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 225.346514][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 225.354905][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 225.363091][ T3014] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 225.377319][T10538] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 330.404778][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 330.411427][ C0] rcu: 0-...!: (10499 ticks this GP) idle=3f2/0/0x3 softirq=10651/10651 fqs=3 [ 330.420427][ C0] (t=10500 jiffies g=11045 q=90) [ 330.425433][ C0] rcu: rcu_preempt kthread starved for 10494 jiffies! g11045 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 330.436765][ C0] rcu: RCU grace-period kthread stack dump: [ 330.443078][ C0] rcu_preempt I29688 10 2 0x80004000 [ 330.449407][ C0] Call Trace: [ 330.452780][ C0] __schedule+0x755/0x1580 [ 330.457182][ C0] ? __sched_text_start+0x8/0x8 [ 330.462159][ C0] schedule+0xd9/0x260 [ 330.466211][ C0] schedule_timeout+0x486/0xc50 [ 330.471043][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 330.475961][ C0] ? usleep_range+0x170/0x170 [ 330.480617][ C0] ? trace_hardirqs_on+0x67/0x240 [ 330.485625][ C0] ? __kasan_check_read+0x11/0x20 [ 330.490644][ C0] ? __next_timer_interrupt+0x1a0/0x1a0 [ 330.496180][ C0] ? swake_up_one+0x60/0x60 [ 330.500924][ C0] rcu_gp_kthread+0x9b2/0x18c0 [ 330.505667][ C0] ? rcu_barrier+0x310/0x310 [ 330.510235][ C0] ? trace_hardirqs_on+0x67/0x240 [ 330.515235][ C0] ? __kasan_check_read+0x11/0x20 [ 330.520239][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 330.526475][ C0] ? __kthread_parkme+0x108/0x1c0 [ 330.531482][ C0] ? __kasan_check_read+0x11/0x20 [ 330.536484][ C0] kthread+0x361/0x430 [ 330.540530][ C0] ? rcu_barrier+0x310/0x310 [ 330.545105][ C0] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 330.551323][ C0] ret_from_fork+0x24/0x30 [ 330.555743][ C0] NMI backtrace for cpu 0 [ 330.560055][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0-rc8+ #0 [ 330.567137][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 330.577167][ C0] Call Trace: [ 330.580430][ C0] [ 330.583319][ C0] dump_stack+0x172/0x1f0 [ 330.587904][ C0] nmi_cpu_backtrace.cold+0x70/0xb2 [ 330.593083][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 330.599322][ C0] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 330.604930][ C0] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 330.610888][ C0] arch_trigger_cpumask_backtrace+0x14/0x20 [ 330.616756][ C0] rcu_dump_cpu_stacks+0x183/0x1cf [ 330.621846][ C0] rcu_sched_clock_irq.cold+0x4dd/0xc13 [ 330.627380][ C0] ? raise_softirq+0x138/0x340 [ 330.632123][ C0] update_process_times+0x32/0x80 [ 330.637124][ C0] tick_sched_handle+0xa2/0x190 [ 330.641951][ C0] tick_sched_timer+0x53/0x140 [ 330.646691][ C0] __hrtimer_run_queues+0x364/0xe40 [ 330.651871][ C0] ? tick_sched_do_timer+0x1b0/0x1b0 [ 330.657133][ C0] ? hrtimer_start_range_ns+0xcb0/0xcb0 [ 330.662657][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 330.668361][ C0] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 330.674404][ C0] hrtimer_interrupt+0x314/0x770 [ 330.679382][ C0] smp_apic_timer_interrupt+0x160/0x610 [ 330.684917][ C0] apic_timer_interrupt+0xf/0x20 [ 330.689833][ C0] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x9/0x20 [ 330.696576][ C0] Code: 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 01 00 00 00 48 89 e5 48 8b 4d 08 e8 f6 fe ff ff 5d c3 0f 1f 40 [ 330.716157][ C0] RSP: 0018:ffff8880ae808f18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 330.724543][ C0] RAX: 0000000000000001 RBX: ffff8880a1dc5978 RCX: ffffffff85c65b39 [ 330.732489][ C0] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000 [ 330.740437][ C0] RBP: ffff8880ae808f78 R08: ffffffff88c7a1c0 R09: 0000000000000000 [ 330.748389][ C0] R10: fffffbfff134afaf R11: ffffffff88c7a1c0 R12: dffffc0000000000 [ 330.756336][ C0] R13: ffff8880a1dc5680 R14: 0000000000000001 R15: 0000000000000000 [ 330.764290][ C0] ? apic_timer_interrupt+0xa/0x20 [ 330.769424][ C0] ? hhf_dequeue+0xb9/0xa20 [ 330.773909][ C0] ? hhf_dequeue+0x5d1/0xa20 [ 330.778513][ C0] __qdisc_run+0x1e7/0x19d0 [ 330.783029][ C0] ? dev_queue_xmit+0x18/0x20 [ 330.787699][ C0] __dev_queue_xmit+0x16f1/0x3650 [ 330.792700][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 330.798055][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 330.803331][ C0] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 330.809577][ C0] ? br_nf_post_routing+0xd73/0x1d30 [ 330.814858][ C0] ? br_forward_finish+0x235/0x400 [ 330.819949][ C0] ? __kasan_check_read+0x11/0x20 [ 330.824949][ C0] ? __dev_queue_xmit+0x2b15/0x3650 [ 330.830130][ C0] dev_queue_xmit+0x18/0x20 [ 330.834622][ C0] ? dev_queue_xmit+0x18/0x20 [ 330.839281][ C0] br_dev_queue_push_xmit+0x3f3/0x5c0 [ 330.844702][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 330.849272][ C0] br_forward_finish+0xfa/0x400 [ 330.854113][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 330.859658][ C0] ? br_fdb_add.cold+0x8c/0x8c [ 330.864423][ C0] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 330.870127][ C0] ? nf_hook_slow+0xf0/0x1e0 [ 330.874700][ C0] __br_forward+0x641/0xb00 [ 330.879186][ C0] ? br_forward_finish+0x400/0x400 [ 330.884291][ C0] ? br_dev_queue_push_xmit+0x5c0/0x5c0 [ 330.889832][ C0] deliver_clone+0x61/0xc0 [ 330.894236][ C0] maybe_deliver+0x2c7/0x390 [ 330.898813][ C0] br_flood+0x13a/0x3d0 [ 330.903022][ C0] br_dev_xmit+0x98c/0x15a0 [ 330.907507][ C0] ? br_poll_controller+0x10/0x10 [ 330.912509][ C0] ? netif_skb_features+0x6c2/0xb90 [ 330.917716][ C0] ? netdev_set_sb_channel+0xe0/0xe0 [ 330.922982][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 330.929233][ C0] ? validate_xmit_xfrm+0x43c/0xf10 [ 330.934409][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 330.940637][ C0] dev_hard_start_xmit+0x1a3/0x9c0 [ 330.945731][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 330.951949][ C0] __dev_queue_xmit+0x2b15/0x3650 [ 330.956952][ C0] ? netdev_core_pick_tx+0x2f0/0x2f0 [ 330.962242][ C0] ? __ip6_finish_output+0x444/0xa50 [ 330.967505][ C0] ? __kasan_check_read+0x11/0x20 [ 330.972530][ C0] ? ipv6_chk_mcast_addr+0x315/0x6f0 [ 330.977793][ C0] ? lock_downgrade+0x920/0x920 [ 330.982624][ C0] ? lock_acquire+0x190/0x410 [ 330.987295][ C0] ? __ip6_finish_output+0x444/0xa50 [ 330.992559][ C0] dev_queue_xmit+0x18/0x20 [ 330.997037][ C0] ? dev_queue_xmit+0x18/0x20 [ 331.001689][ C0] ip6_finish_output2+0xf58/0x2520 [ 331.006790][ C0] ? ip6_forward_finish+0x530/0x530 [ 331.011998][ C0] ? ip6_mtu+0x16f/0x460 [ 331.016223][ C0] __ip6_finish_output+0x444/0xa50 [ 331.021311][ C0] ? __ip6_finish_output+0x444/0xa50 [ 331.026591][ C0] ip6_finish_output+0x38/0x1f0 [ 331.031440][ C0] ip6_output+0x235/0x7c0 [ 331.035772][ C0] ? ip6_finish_output+0x1f0/0x1f0 [ 331.040868][ C0] ? __ip6_finish_output+0xa50/0xa50 [ 331.046136][ C0] ? icmp6_dst_alloc+0x432/0x660 [ 331.051054][ C0] mld_sendpack+0x9c7/0xea0 [ 331.055537][ C0] ? nf_hook.constprop.0+0x560/0x560 [ 331.060803][ C0] ? mld_ifc_timer_expire+0x437/0x8a0 [ 331.066151][ C0] ? __local_bh_enable_ip+0x15a/0x270 [ 331.071499][ C0] mld_ifc_timer_expire+0x449/0x8a0 [ 331.076686][ C0] call_timer_fn+0x1ac/0x780 [ 331.081257][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 331.086605][ C0] ? msleep_interruptible+0x150/0x150 [ 331.091955][ C0] ? trace_hardirqs_on+0x67/0x240 [ 331.096956][ C0] ? __kasan_check_read+0x11/0x20 [ 331.101970][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 331.107336][ C0] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 331.112698][ C0] run_timer_softirq+0x697/0x17a0 [ 331.117707][ C0] ? add_timer+0x930/0x930 [ 331.122101][ C0] ? kvm_clock_read+0x18/0x30 [ 331.126755][ C0] ? kvm_sched_clock_read+0x9/0x20 [ 331.131841][ C0] ? sched_clock+0x2e/0x50 [ 331.136339][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 331.141211][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 331.147447][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 331.153676][ C0] __do_softirq+0x262/0x98c [ 331.158163][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 331.163016][ C0] irq_exit+0x19b/0x1e0 [ 331.167157][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 331.172688][ C0] apic_timer_interrupt+0xf/0x20 [ 331.177597][ C0] [ 331.180514][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 331.185867][ C0] Code: 38 73 6e fa eb 8a 90 90 90 90 90 90 e9 07 00 00 00 0f 00 2d 24 1b 4a 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 14 1b 4a 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 ee 32 22 fa e8 39 [ 331.205458][ C0] RSP: 0018:ffffffff88c07ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 331.213844][ C0] RAX: 1ffffffff11a5e8d RBX: ffffffff88c7a1c0 RCX: 1ffffffff134b5ee [ 331.221793][ C0] RDX: dffffc0000000000 RSI: ffffffff8177f14e RDI: ffffffff873e050c [ 331.229741][ C0] RBP: ffffffff88c07d18 R08: ffffffff88c7a1c0 R09: fffffbfff118f439 [ 331.237698][ C0] R10: fffffbfff118f438 R11: ffffffff88c7a1c7 R12: dffffc0000000000 [ 331.245656][ C0] R13: ffffffff89a57d78 R14: 0000000000000000 R15: 0000000000000000 [ 331.253621][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 331.258623][ C0] ? default_idle+0x1c/0x360 [ 331.263190][ C0] ? default_idle+0x4e/0x360 [ 331.267757][ C0] arch_cpu_idle+0xa/0x10 [ 331.272064][ C0] default_idle_call+0x84/0xb0 [ 331.279409][ C0] do_idle+0x413/0x760 [ 331.283456][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 331.288457][ C0] ? trace_hardirqs_on+0x67/0x240 [ 331.293460][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 331.299676][ C0] ? debug_smp_processor_id+0x3c/0x214 [ 331.305126][ C0] cpu_startup_entry+0x1b/0x20 [ 331.310048][ C0] rest_init+0x245/0x37b [ 331.314328][ C0] arch_call_rest_init+0xe/0x1b [ 331.319156][ C0] start_kernel+0x912/0x951 [ 331.323646][ C0] ? mem_encrypt_init+0xb/0xb [ 331.328305][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 331.334521][ C0] ? x86_family+0x41/0x50 [ 331.338831][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 331.345061][ C0] x86_64_start_reservations+0x29/0x2b [ 331.350516][ C0] x86_64_start_kernel+0x77/0x7b [ 331.355454][ C0] secondary_startup_64+0xa4/0xb0