[ 38.437406] audit: type=1800 audit(1568161275.677:32): pid=7463 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. [ 39.152971] audit: type=1800 audit(1568161276.437:33): pid=7463 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 '10.128.1.25' (ECDSA) to the list of known hosts. syzkaller login: [ 168.683416] kauditd_printk_skb: 2 callbacks suppressed [ 168.683433] audit: type=1400 audit(1568161405.967:36): avc: denied { map } for pid=7649 comm="syz-executor078" path="/root/syz-executor078803813" 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 [ 168.704247] IPVS: ftp: loaded support on port[0] = 21 [ 168.777426] chnl_net:caif_netlink_parms(): no params data found [ 168.814445] bridge0: port 1(bridge_slave_0) entered blocking state [ 168.822078] bridge0: port 1(bridge_slave_0) entered disabled state [ 168.830631] device bridge_slave_0 entered promiscuous mode [ 168.839858] bridge0: port 2(bridge_slave_1) entered blocking state [ 168.847336] bridge0: port 2(bridge_slave_1) entered disabled state [ 168.856364] device bridge_slave_1 entered promiscuous mode [ 168.873487] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 168.883387] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 168.905863] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 168.914253] team0: Port device team_slave_0 added [ 168.920255] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 168.928568] team0: Port device team_slave_1 added [ 168.935276] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 168.943510] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 169.003430] device hsr_slave_0 entered promiscuous mode [ 169.050941] device hsr_slave_1 entered promiscuous mode [ 169.091215] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 169.098824] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 169.115071] bridge0: port 2(bridge_slave_1) entered blocking state [ 169.122633] bridge0: port 2(bridge_slave_1) entered forwarding state [ 169.130188] bridge0: port 1(bridge_slave_0) entered blocking state [ 169.137032] bridge0: port 1(bridge_slave_0) entered forwarding state [ 169.169982] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 169.177104] 8021q: adding VLAN 0 to HW filter on device bond0 [ 169.186552] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 169.197203] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 169.218071] bridge0: port 1(bridge_slave_0) entered disabled state [ 169.227009] bridge0: port 2(bridge_slave_1) entered disabled state [ 169.235549] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 169.247631] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 169.254480] 8021q: adding VLAN 0 to HW filter on device team0 [ 169.264916] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 169.273330] bridge0: port 1(bridge_slave_0) entered blocking state [ 169.279712] bridge0: port 1(bridge_slave_0) entered forwarding state [ 169.290102] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 169.299061] bridge0: port 2(bridge_slave_1) entered blocking state [ 169.306079] bridge0: port 2(bridge_slave_1) entered forwarding state [ 169.323120] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 169.332766] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 169.344773] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 169.358883] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 169.370479] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 169.382080] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 169.388743] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 169.397337] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 169.405698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready executing program [ 169.418193] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 169.429976] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 274.460552] rcu: INFO: rcu_preempt self-detected stall on CPU [ 274.468957] rcu: 0-...!: (10499 ticks this GP) idle=4aa/1/0x4000000000000002 softirq=9882/9882 fqs=13 [ 274.478713] rcu: (t=10501 jiffies g=5285 q=20) [ 274.483470] rcu: rcu_preempt kthread starved for 10476 jiffies! g5285 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1 [ 274.494370] rcu: RCU grace-period kthread stack dump: [ 274.499541] rcu_preempt I29424 10 2 0x80000000 [ 274.505296] Call Trace: [ 274.508071] __schedule+0x866/0x1dc0 [ 274.511794] ? pci_mmcfg_check_reserved+0x170/0x170 [ 274.516796] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 274.521970] ? lockdep_hardirqs_on+0x415/0x5d0 [ 274.526574] ? trace_hardirqs_on+0x67/0x220 [ 274.531338] schedule+0x92/0x1c0 [ 274.534694] schedule_timeout+0x4db/0xfc0 [ 274.539201] ? usleep_range+0x170/0x170 [ 274.543198] ? trace_hardirqs_on+0x67/0x220 [ 274.547604] ? kasan_check_read+0x11/0x20 [ 274.551859] ? __next_timer_interrupt+0x1a0/0x1a0 [ 274.556752] ? prepare_to_swait_exclusive+0x120/0x120 [ 274.562091] rcu_gp_kthread+0xd5c/0x2190 [ 274.566166] ? rcu_blocking_is_gp+0x90/0x90 [ 274.570483] ? trace_hardirqs_on+0x67/0x220 [ 274.574800] ? kasan_check_read+0x11/0x20 [ 274.579171] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 274.584359] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 274.589978] ? __kthread_parkme+0xfb/0x1b0 [ 274.594236] kthread+0x354/0x420 [ 274.597632] ? rcu_blocking_is_gp+0x90/0x90 [ 274.601949] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 274.607494] ret_from_fork+0x24/0x30 [ 274.611671] NMI backtrace for cpu 0 [ 274.615326] CPU: 0 PID: 2662 Comm: kworker/0:2 Not tainted 4.19.72 #0 [ 274.621890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 274.631396] Workqueue: ipv6_addrconf addrconf_dad_work [ 274.636683] Call Trace: [ 274.639258] [ 274.641648] dump_stack+0x172/0x1f0 [ 274.645277] nmi_cpu_backtrace.cold+0x63/0xa4 [ 274.649891] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 274.654813] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 274.660086] arch_trigger_cpumask_backtrace+0x14/0x20 [ 274.665268] rcu_dump_cpu_stacks+0x189/0x1d5 [ 274.669710] ? wake_up_process+0x10/0x20 [ 274.673789] rcu_check_callbacks.cold+0x5e3/0xd90 [ 274.678624] ? trace_hardirqs_off+0x62/0x220 [ 274.683142] update_process_times+0x32/0x80 [ 274.687478] tick_sched_handle+0xa2/0x190 [ 274.691645] tick_sched_timer+0x47/0x130 [ 274.695699] __hrtimer_run_queues+0x33b/0xdc0 [ 274.700186] ? tick_sched_do_timer+0x1b0/0x1b0 [ 274.704785] ? hrtimer_fixup_activate+0x30/0x30 [ 274.709456] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 274.714488] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 274.719967] hrtimer_interrupt+0x314/0x770 [ 274.724262] smp_apic_timer_interrupt+0x111/0x550 [ 274.729117] apic_timer_interrupt+0xf/0x20 [ 274.733445] RIP: 0010:__list_del_entry_valid+0x58/0xf5 [ 274.738752] Code: f2 4d 8b 66 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 9d 00 00 00 48 b8 00 01 00 00 00 00 ad de 4d 8b 2e <49> 39 c5 0f 84 e1 00 00 00 48 b8 00 02 00 00 00 00 ad de 49 39 c4 [ 274.757752] RSP: 0018:ffff8880ae806b10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 274.765505] RAX: dead000000000100 RBX: ffff8880922c0bf8 RCX: ffffffff858e78e9 [ 274.772966] RDX: 1ffff1101245817f RSI: ffffffff858e7d9b RDI: ffff8880922c0c00 [ 274.780316] RBP: ffff8880ae806b28 R08: ffff88809fe36600 R09: 000000000000000a [ 274.787578] R10: ffff88809fe37010 R11: 00000000f50f4f9e R12: ffff8880922c0c90 [ 274.794883] R13: ffff8880922c0c90 R14: ffff8880922c0bf8 R15: 0000000000000000 [ 274.802197] ? apic_timer_interrupt+0xa/0x20 [ 274.806668] ? hhf_dequeue+0xb9/0xa00 [ 274.810547] ? hhf_dequeue+0x56b/0xa00 [ 274.814703] hhf_dequeue+0x5aa/0xa00 [ 274.818555] __qdisc_run+0x1e7/0x1960 [ 274.822441] __dev_queue_xmit+0x165c/0x2fe0 [ 274.826817] ? deliver_clone+0x61/0xc0 [ 274.830708] ? br_flood+0x5fa/0x710 [ 274.834349] ? br_handle_frame_finish+0xf72/0x1510 [ 274.839370] ? netdev_pick_tx+0x300/0x300 [ 274.843508] ? do_softirq_own_stack+0x2a/0x40 [ 274.848142] ? do_softirq.part.0+0x11a/0x170 [ 274.852546] ? __local_bh_enable_ip+0x211/0x270 [ 274.857261] ? ip6_finish_output2+0xae0/0x2550 [ 274.861836] ? ip6_finish_output+0x574/0xbe0 [ 274.866455] ? ndisc_send_skb+0xf3b/0x1460 [ 274.870683] ? ndisc_send_ns+0x3a9/0x850 [ 274.875689] ? addrconf_dad_work+0xb88/0x1150 [ 274.880176] ? worker_thread+0x98/0xe40 [ 274.884141] ? kthread+0x354/0x420 [ 274.887671] ? ret_from_fork+0x24/0x30 [ 274.891660] ? __lock_is_held+0xb6/0x140 [ 274.895729] dev_queue_xmit+0x18/0x20 [ 274.899527] ? dev_queue_xmit+0x18/0x20 [ 274.903503] br_dev_queue_push_xmit+0x405/0x5d0 [ 274.908205] ? br_nf_dev_queue_xmit+0x38c/0x1610 [ 274.913044] br_nf_dev_queue_xmit+0x365/0x1610 [ 274.917624] br_nf_post_routing+0x76f/0x12f0 [ 274.922025] ? find_inlist_lock.constprop.0+0x22a/0x230 [ 274.927380] ? br_nf_dev_queue_xmit+0x1610/0x1610 [ 274.932241] ? ipv6_skip_exthdr+0x5b0/0x5c0 [ 274.936555] ? br_nf_pre_routing_finish_bridge+0xaa0/0xaa0 [ 274.942277] nf_hook_slow+0xbc/0x1e0 [ 274.946041] br_forward_finish+0x215/0x400 [ 274.950304] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 274.955174] ? br_fdb_add.cold+0x8a/0x8a [ 274.959322] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 274.964330] ? nf_hook_slow+0xf0/0x1e0 [ 274.968226] br_nf_hook_thresh+0x2e9/0x370 [ 274.972883] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 274.977830] ? setup_pre_routing+0x470/0x470 [ 274.982248] ? find_held_lock+0x35/0x130 [ 274.986313] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 274.991163] br_nf_forward_finish+0x356/0x700 [ 274.995663] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.000588] br_nf_forward_ip+0x6b4/0x17c0 [ 275.004819] ? br_nf_forward_finish+0x700/0x700 [ 275.009602] ? refcount_inc_not_zero_checked+0x147/0x200 [ 275.015079] ? br_nf_hook_thresh+0x370/0x370 [ 275.019501] nf_hook_slow+0xbc/0x1e0 [ 275.023226] __br_forward+0x393/0xb30 [ 275.027020] ? br_forward_finish+0x400/0x400 [ 275.032463] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.037324] deliver_clone+0x61/0xc0 [ 275.041030] br_flood+0x5fa/0x710 [ 275.044489] br_handle_frame_finish+0xf72/0x1510 [ 275.049238] ? br_handle_local_finish+0x20/0x20 [ 275.053900] ? __lock_is_held+0xb6/0x140 [ 275.057954] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 275.062969] ? nf_hook_slow+0xf0/0x1e0 [ 275.066859] br_nf_hook_thresh+0x2e9/0x370 [ 275.071085] ? br_handle_local_finish+0x20/0x20 [ 275.075748] ? setup_pre_routing+0x470/0x470 [ 275.080187] ? br_handle_local_finish+0x20/0x20 [ 275.084872] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 275.090055] br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 [ 275.095322] ? br_handle_local_finish+0x20/0x20 [ 275.100178] ? kasan_check_read+0x11/0x20 [ 275.105476] br_nf_pre_routing_ipv6+0x4a5/0x8ca [ 275.110182] ? br_validate_ipv6+0xb90/0xb90 [ 275.114540] ? br_nf_pre_routing_finish.cold+0x11d/0x11d [ 275.120010] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 275.125701] ? skb_pull_rcsum+0x164/0x340 [ 275.129871] br_nf_pre_routing+0x1016/0x159c [ 275.134321] ? br_nf_pre_routing_finish+0x1960/0x1960 [ 275.139530] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 275.145062] ? ebt_broute+0x127/0x190 [ 275.148955] nf_hook_slow+0xbc/0x1e0 [ 275.152750] br_handle_frame+0x985/0x1480 [ 275.156892] ? br_handle_frame_finish+0x1510/0x1510 [ 275.162000] ? br_handle_local_finish+0x20/0x20 [ 275.167033] ? br_handle_frame_finish+0x1510/0x1510 [ 275.172238] __netif_receive_skb_core+0xac1/0x3570 [ 275.177160] ? __lock_acquire+0x6ee/0x49c0 [ 275.181399] ? __lock_acquire+0x6ee/0x49c0 [ 275.185678] ? start_kernel+0x88c/0x8c5 [ 275.189659] ? netif_receive_skb+0x2d0/0x2d0 [ 275.194060] ? mark_held_locks+0x100/0x100 [ 275.198289] ? process_backlog+0x482/0x7a0 [ 275.202519] __netif_receive_skb_one_core+0xa8/0x1a0 [ 275.207621] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 275.212891] ? __netif_receive_skb_core+0x3570/0x3570 [ 275.218075] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 275.223606] ? check_preemption_disabled+0x48/0x290 [ 275.228612] ? lock_acquire+0x16f/0x3f0 [ 275.232609] __netif_receive_skb+0x2c/0x1d0 [ 275.236983] process_backlog+0x23a/0x7a0 [ 275.241061] ? net_rx_action+0x27b/0x1070 [ 275.245213] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 275.249802] net_rx_action+0x4f5/0x1070 [ 275.253797] ? napi_complete_done+0x500/0x500 [ 275.258282] ? __lock_is_held+0xb6/0x140 [ 275.262370] __do_softirq+0x25c/0x921 [ 275.266163] ? rcu_nmi_exit+0xe4/0x140 [ 275.270344] ? ip6_finish_output2+0xb9f/0x2550 [ 275.274965] do_softirq_own_stack+0x2a/0x40 [ 275.279285] [ 275.281522] do_softirq.part.0+0x11a/0x170 [ 275.285754] __local_bh_enable_ip+0x211/0x270 [ 275.290330] ip6_finish_output2+0xbd2/0x2550 [ 275.294754] ? find_held_lock+0x35/0x130 [ 275.298851] ? ip6_mtu+0x2e6/0x460 [ 275.302402] ? ip6_forward_finish+0x4d0/0x4d0 [ 275.306909] ? lock_downgrade+0x810/0x810 [ 275.311198] ? kasan_check_read+0x11/0x20 [ 275.315504] ip6_finish_output+0x574/0xbe0 [ 275.319732] ? ip6_finish_output+0x574/0xbe0 [ 275.324196] ip6_output+0x235/0x7c0 [ 275.327848] ? ip6_finish_output+0xbe0/0xbe0 [ 275.332260] ? ip6_fragment+0x3770/0x3770 [ 275.336433] ndisc_send_skb+0xf3b/0x1460 [ 275.340534] ? nf_hook.constprop.0+0x560/0x560 [ 275.345261] ? skb_set_owner_w+0x24c/0x360 [ 275.349541] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 275.354603] ndisc_send_ns+0x3a9/0x850 [ 275.358510] ? mark_held_locks+0xb1/0x100 [ 275.362666] ? ndisc_netdev_event+0x470/0x470 [ 275.367162] ? lockdep_hardirqs_on+0x415/0x5d0 [ 275.372016] ? addrconf_dad_work+0xac4/0x1150 [ 275.376516] ? trace_hardirqs_on+0x67/0x220 [ 275.380837] ? addrconf_dad_work+0xac4/0x1150 [ 275.385338] addrconf_dad_work+0xb88/0x1150 [ 275.389787] ? addrconf_dad_completed+0xbb0/0xbb0 [ 275.394661] process_one_work+0x989/0x1750 [ 275.398906] ? pwq_dec_nr_in_flight+0x320/0x320 [ 275.403597] ? lock_acquire+0x16f/0x3f0 [ 275.407602] ? kasan_check_write+0x14/0x20 [ 275.411842] ? do_raw_spin_lock+0xc8/0x240 [ 275.416354] worker_thread+0x98/0xe40 [ 275.420167] ? trace_hardirqs_on+0x67/0x220 [ 275.424503] kthread+0x354/0x420 [ 275.427884] ? process_one_work+0x1750/0x1750 [ 275.432398] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 275.437994] ret_from_fork+0x24/0x30