Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 39.627566] audit: type=1800 audit(1568431740.684:33): pid=7472 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 syzkaller login: [ 44.684440] kauditd_printk_skb: 1 callbacks suppressed [ 44.684454] audit: type=1400 audit(1568431745.744:35): avc: denied { map } for pid=7646 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. [ 192.305981] audit: type=1400 audit(1568431893.364:36): avc: denied { map } for pid=7658 comm="syz-executor204" path="/root/syz-executor204271844" 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 [ 192.326821] IPVS: ftp: loaded support on port[0] = 21 [ 192.392067] chnl_net:caif_netlink_parms(): no params data found [ 192.423934] bridge0: port 1(bridge_slave_0) entered blocking state [ 192.430717] bridge0: port 1(bridge_slave_0) entered disabled state [ 192.438332] device bridge_slave_0 entered promiscuous mode [ 192.447010] bridge0: port 2(bridge_slave_1) entered blocking state [ 192.453450] bridge0: port 2(bridge_slave_1) entered disabled state [ 192.460400] device bridge_slave_1 entered promiscuous mode [ 192.476113] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 192.484992] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 192.501161] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 192.508805] team0: Port device team_slave_0 added [ 192.514266] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 192.521393] team0: Port device team_slave_1 added [ 192.526734] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 192.534009] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 192.615364] device hsr_slave_0 entered promiscuous mode [ 192.683993] device hsr_slave_1 entered promiscuous mode [ 192.744090] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 192.751102] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 192.765257] bridge0: port 2(bridge_slave_1) entered blocking state [ 192.771644] bridge0: port 2(bridge_slave_1) entered forwarding state [ 192.778633] bridge0: port 1(bridge_slave_0) entered blocking state [ 192.785046] bridge0: port 1(bridge_slave_0) entered forwarding state [ 192.814279] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 192.820385] 8021q: adding VLAN 0 to HW filter on device bond0 [ 192.828527] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 192.837055] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 192.855860] bridge0: port 1(bridge_slave_0) entered disabled state [ 192.862907] bridge0: port 2(bridge_slave_1) entered disabled state [ 192.870067] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 192.882137] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 192.888561] 8021q: adding VLAN 0 to HW filter on device team0 [ 192.897554] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 192.905745] bridge0: port 1(bridge_slave_0) entered blocking state [ 192.912071] bridge0: port 1(bridge_slave_0) entered forwarding state [ 192.921199] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 192.929528] bridge0: port 2(bridge_slave_1) entered blocking state [ 192.935960] bridge0: port 2(bridge_slave_1) entered forwarding state [ 192.950563] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 192.958202] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 192.967512] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 192.980928] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 192.991411] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 193.002758] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 193.009272] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 193.017351] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 193.025106] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 193.038521] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 193.048281] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 298.183231] rcu: INFO: rcu_preempt self-detected stall on CPU [ 298.189405] rcu: 1-...!: (10500 ticks this GP) idle=252/1/0x4000000000000002 softirq=11275/11275 fqs=0 [ 298.199203] rcu: (t=10501 jiffies g=5301 q=85) [ 298.203960] rcu: rcu_preempt kthread starved for 10502 jiffies! g5301 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 298.214532] rcu: RCU grace-period kthread stack dump: [ 298.219724] rcu_preempt I29504 10 2 0x80000000 [ 298.225351] Call Trace: [ 298.228014] __schedule+0x866/0x1dc0 [ 298.231727] ? pci_mmcfg_check_reserved+0x170/0x170 [ 298.236732] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 298.241872] ? lockdep_hardirqs_on+0x415/0x5d0 [ 298.246464] ? trace_hardirqs_on+0x67/0x220 [ 298.250777] schedule+0x92/0x1c0 [ 298.254132] schedule_timeout+0x4db/0xfc0 [ 298.258290] ? usleep_range+0x170/0x170 [ 298.262253] ? trace_hardirqs_on+0x67/0x220 [ 298.266589] ? kasan_check_read+0x11/0x20 [ 298.270750] ? __next_timer_interrupt+0x1a0/0x1a0 [ 298.275603] ? prepare_to_swait_exclusive+0x120/0x120 [ 298.280807] rcu_gp_kthread+0xd5c/0x2190 [ 298.284890] ? rcu_blocking_is_gp+0x90/0x90 [ 298.289220] ? trace_hardirqs_on+0x67/0x220 [ 298.293536] ? kasan_check_read+0x11/0x20 [ 298.297682] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 298.302959] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 298.308543] ? __kthread_parkme+0xfb/0x1b0 [ 298.312775] kthread+0x354/0x420 [ 298.316134] ? rcu_blocking_is_gp+0x90/0x90 [ 298.320461] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 298.325997] ret_from_fork+0x24/0x30 [ 298.329742] NMI backtrace for cpu 1 [ 298.333367] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.72 #0 [ 298.339772] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 298.349212] Workqueue: ipv6_addrconf addrconf_dad_work [ 298.354477] Call Trace: [ 298.357044] [ 298.359195] dump_stack+0x172/0x1f0 [ 298.362814] nmi_cpu_backtrace.cold+0x63/0xa4 [ 298.367334] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 298.372253] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 298.377520] arch_trigger_cpumask_backtrace+0x14/0x20 [ 298.382700] rcu_dump_cpu_stacks+0x189/0x1d5 [ 298.387130] ? wake_up_process+0x10/0x20 [ 298.391185] rcu_check_callbacks.cold+0x5e3/0xd90 [ 298.396019] ? trace_hardirqs_off+0x62/0x220 [ 298.400454] update_process_times+0x32/0x80 [ 298.404785] tick_sched_handle+0xa2/0x190 [ 298.408926] tick_sched_timer+0x47/0x130 [ 298.412979] __hrtimer_run_queues+0x33b/0xdc0 [ 298.417464] ? tick_sched_do_timer+0x1b0/0x1b0 [ 298.422036] ? hrtimer_fixup_activate+0x30/0x30 [ 298.426705] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 298.431710] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 298.437067] hrtimer_interrupt+0x314/0x770 [ 298.441298] smp_apic_timer_interrupt+0x111/0x550 [ 298.446142] apic_timer_interrupt+0xf/0x20 [ 298.450370] [ 298.452642] RIP: 0010:hhf_dequeue+0x4f8/0xa00 [ 298.457126] Code: 08 48 c1 e8 03 42 80 3c 20 00 0f 85 05 04 00 00 49 89 1f e9 66 fb ff ff e8 75 d9 dc fb 48 8b 45 b8 4c 8b 75 c8 42 80 3c 20 00 <0f> 85 13 04 00 00 49 8b 85 50 03 00 00 48 39 45 c8 0f 85 66 fb ff [ 298.476023] RSP: 0018:ffff8880aa2b6df8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 298.483720] RAX: 1ffff110152923d2 RBX: ffff8880a9491df8 RCX: ffffffff858e7e8e [ 298.490975] RDX: 0000000000000000 RSI: ffffffff858e7d1b RDI: ffff8880a9491e00 [ 298.498231] RBP: ffff8880aa2b6e48 R08: ffff8880aa2a8500 R09: 0000000000000009 [ 298.505487] R10: ffff8880aa2a8ee8 R11: 00000000ad854ed6 R12: dffffc0000000000 [ 298.512756] R13: ffff8880a9491b40 R14: ffff8880a9491e90 R15: ffff8880a9491e90 [ 298.520023] ? hhf_dequeue+0x65e/0xa00 [ 298.523898] ? hhf_dequeue+0x4eb/0xa00 [ 298.527774] ? hhf_dequeue+0x4eb/0xa00 [ 298.531710] __qdisc_run+0x1e7/0x1960 [ 298.535550] __dev_queue_xmit+0x165c/0x2fe0 [ 298.539877] ? netdev_pick_tx+0x300/0x300 [ 298.544016] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 298.549592] ? br_nf_post_routing+0x780/0x12f0 [ 298.554184] ? br_forward_finish+0x235/0x400 [ 298.558582] ? find_held_lock+0x35/0x130 [ 298.562630] ? br_forward_finish+0x235/0x400 [ 298.567031] dev_queue_xmit+0x18/0x20 [ 298.570820] ? dev_queue_xmit+0x18/0x20 [ 298.574782] br_dev_queue_push_xmit+0x405/0x5d0 [ 298.579441] ? kasan_check_read+0x11/0x20 [ 298.583578] br_forward_finish+0xfa/0x400 [ 298.587715] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 298.592546] ? br_fdb_add.cold+0x8a/0x8a [ 298.596595] ? kasan_check_read+0x11/0x20 [ 298.600733] __br_forward+0x647/0xb30 [ 298.604526] ? br_forward_finish+0x400/0x400 [ 298.608925] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 298.613762] deliver_clone+0x61/0xc0 [ 298.617464] br_flood+0x4da/0x710 [ 298.620913] br_dev_xmit+0xeeb/0x1490 [ 298.624706] ? br_poll_controller+0x10/0x10 [ 298.629015] ? __lock_is_held+0xb6/0x140 [ 298.633072] dev_hard_start_xmit+0x1a5/0x980 [ 298.637530] ? check_preemption_disabled+0x48/0x290 [ 298.642539] __dev_queue_xmit+0x2704/0x2fe0 [ 298.646853] ? netdev_pick_tx+0x300/0x300 [ 298.651013] ? ip6_finish_output2+0xae0/0x2550 [ 298.655585] ? find_held_lock+0x35/0x130 [ 298.659635] ? ip6_finish_output2+0xb7f/0x2550 [ 298.664205] ? mark_held_locks+0xb1/0x100 [ 298.668353] dev_queue_xmit+0x18/0x20 [ 298.672143] ? dev_queue_xmit+0x18/0x20 [ 298.676130] neigh_resolve_output+0x5b7/0x980 [ 298.680620] ip6_finish_output2+0xb7f/0x2550 [ 298.685016] ? find_held_lock+0x35/0x130 [ 298.689088] ? ip6_mtu+0x2e6/0x460 [ 298.692619] ? ip6_forward_finish+0x4d0/0x4d0 [ 298.697104] ? lock_downgrade+0x810/0x810 [ 298.701243] ? kasan_check_read+0x11/0x20 [ 298.705389] ip6_finish_output+0x574/0xbe0 [ 298.709613] ? ip6_finish_output+0x574/0xbe0 [ 298.714012] ip6_output+0x235/0x7c0 [ 298.717628] ? ip6_finish_output+0xbe0/0xbe0 [ 298.722026] ? ip6_fragment+0x3770/0x3770 [ 298.726168] ndisc_send_skb+0xf3b/0x1460 [ 298.730222] ? nf_hook.constprop.0+0x560/0x560 [ 298.734853] ? skb_set_owner_w+0x24c/0x360 [ 298.739081] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 298.744090] ndisc_send_ns+0x3a9/0x850 [ 298.747979] ? mark_held_locks+0xb1/0x100 [ 298.752119] ? ndisc_netdev_event+0x470/0x470 [ 298.756601] ? lockdep_hardirqs_on+0x415/0x5d0 [ 298.761170] ? addrconf_dad_work+0xac4/0x1150 [ 298.765653] ? trace_hardirqs_on+0x67/0x220 [ 298.769964] ? addrconf_dad_work+0xac4/0x1150 [ 298.774464] addrconf_dad_work+0xb88/0x1150 [ 298.778778] ? addrconf_dad_completed+0xbb0/0xbb0 [ 298.783612] process_one_work+0x989/0x1750 [ 298.787841] ? pwq_dec_nr_in_flight+0x320/0x320 [ 298.792496] ? lock_acquire+0x16f/0x3f0 [ 298.796462] ? kasan_check_write+0x14/0x20 [ 298.800685] ? do_raw_spin_lock+0xc8/0x240 [ 298.804908] worker_thread+0x98/0xe40 [ 298.808708] kthread+0x354/0x420 [ 298.812082] ? process_one_work+0x1750/0x1750 [ 298.816565] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 298.822092] ret_from_fork+0x24/0x30