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 syzkaller login: [ 44.426563] kauditd_printk_skb: 3 callbacks suppressed [ 44.426578] audit: type=1400 audit(1567840535.655:35): avc: denied { map } for pid=7762 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 [ 130.326839] audit: type=1400 audit(1567840621.555:36): avc: denied { map } for pid=7770 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.15' (ECDSA) to the list of known hosts. [ 169.582231] audit: type=1400 audit(1567840660.815:37): avc: denied { map } for pid=7777 comm="syz-executor958" path="/root/syz-executor958538379" 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 [ 169.607025] IPVS: ftp: loaded support on port[0] = 21 [ 169.666926] chnl_net:caif_netlink_parms(): no params data found [ 169.704314] bridge0: port 1(bridge_slave_0) entered blocking state [ 169.711207] bridge0: port 1(bridge_slave_0) entered disabled state [ 169.718561] device bridge_slave_0 entered promiscuous mode [ 169.726674] bridge0: port 2(bridge_slave_1) entered blocking state [ 169.733298] bridge0: port 2(bridge_slave_1) entered disabled state [ 169.740340] device bridge_slave_1 entered promiscuous mode [ 169.757902] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 169.767222] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 169.785359] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 169.793076] team0: Port device team_slave_0 added [ 169.798687] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 169.806159] team0: Port device team_slave_1 added [ 169.811758] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 169.819150] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 169.873749] device hsr_slave_0 entered promiscuous mode [ 169.941523] device hsr_slave_1 entered promiscuous mode [ 169.981791] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 169.989186] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 170.005049] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.011633] bridge0: port 2(bridge_slave_1) entered forwarding state [ 170.018566] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.024991] bridge0: port 1(bridge_slave_0) entered forwarding state [ 170.055781] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 170.063591] 8021q: adding VLAN 0 to HW filter on device bond0 [ 170.074048] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 170.083242] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 170.103608] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.111046] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.119183] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 170.129587] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 170.136167] 8021q: adding VLAN 0 to HW filter on device team0 [ 170.145780] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 170.153873] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.160242] bridge0: port 1(bridge_slave_0) entered forwarding state [ 170.170470] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 170.178794] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.185335] bridge0: port 2(bridge_slave_1) entered forwarding state [ 170.200831] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 170.209891] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 170.219791] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 170.230934] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 170.243175] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 170.254876] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 170.260937] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 170.275464] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 170.285742] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 275.291231] rcu: INFO: rcu_preempt self-detected stall on CPU [ 275.298975] rcu: 1-...!: (10499 ticks this GP) idle=206/1/0x4000000000000002 softirq=12589/12589 fqs=8 [ 275.308874] rcu: (t=10501 jiffies g=5557 q=94) [ 275.313817] rcu: rcu_preempt kthread starved for 10486 jiffies! g5557 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0 [ 275.324373] rcu: RCU grace-period kthread stack dump: [ 275.329553] rcu_preempt I29104 10 2 0x80000000 [ 275.335229] Call Trace: [ 275.337983] __schedule+0x866/0x1dc0 [ 275.341700] ? pci_mmcfg_check_reserved+0x170/0x170 [ 275.346722] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 275.351885] ? lockdep_hardirqs_on+0x415/0x5d0 [ 275.356534] ? trace_hardirqs_on+0x67/0x220 [ 275.360865] schedule+0x92/0x1c0 [ 275.364234] schedule_timeout+0x4db/0xfc0 [ 275.368386] ? usleep_range+0x170/0x170 [ 275.372357] ? trace_hardirqs_on+0x67/0x220 [ 275.376767] ? kasan_check_read+0x11/0x20 [ 275.380936] ? __next_timer_interrupt+0x1a0/0x1a0 [ 275.385806] ? prepare_to_swait_exclusive+0x120/0x120 [ 275.391018] rcu_gp_kthread+0xd5c/0x2190 [ 275.395091] ? rcu_blocking_is_gp+0x90/0x90 [ 275.399408] ? trace_hardirqs_on+0x67/0x220 [ 275.404073] ? kasan_check_read+0x11/0x20 [ 275.408216] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 275.413353] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 275.418942] ? __kthread_parkme+0xfb/0x1b0 [ 275.423180] kthread+0x354/0x420 [ 275.426538] ? rcu_blocking_is_gp+0x90/0x90 [ 275.430850] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 275.436570] ret_from_fork+0x24/0x30 [ 275.440365] NMI backtrace for cpu 1 [ 275.444033] CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.19.71 #0 [ 275.450438] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 275.459793] Call Trace: [ 275.462373] [ 275.464580] dump_stack+0x172/0x1f0 [ 275.468219] nmi_cpu_backtrace.cold+0x63/0xa4 [ 275.472757] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 275.477690] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 275.482968] arch_trigger_cpumask_backtrace+0x14/0x20 [ 275.488166] rcu_dump_cpu_stacks+0x189/0x1d5 [ 275.492605] ? wake_up_process+0x10/0x20 [ 275.496677] rcu_check_callbacks.cold+0x5e3/0xd90 [ 275.501517] ? trace_hardirqs_off+0x62/0x220 [ 275.505981] update_process_times+0x32/0x80 [ 275.510326] tick_sched_handle+0xa2/0x190 [ 275.514500] tick_sched_timer+0x47/0x130 [ 275.518556] __hrtimer_run_queues+0x33b/0xdc0 [ 275.523045] ? tick_sched_do_timer+0x1b0/0x1b0 [ 275.527625] ? hrtimer_fixup_activate+0x30/0x30 [ 275.532289] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 275.537305] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 275.542678] hrtimer_interrupt+0x314/0x770 [ 275.546932] smp_apic_timer_interrupt+0x111/0x550 [ 275.551774] apic_timer_interrupt+0xf/0x20 [ 275.555998] [ 275.558232] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x50 [ 275.563598] Code: 66 ea ff 48 c7 05 44 12 cd 08 00 00 00 00 e9 ca e9 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 48 8b 75 08 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 28 87 96 7e 81 e2 00 01 1f 00 [ 275.582502] RSP: 0018:ffff8880aa2a6988 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 275.590224] RAX: 0000000000000007 RBX: ffff888098d654f8 RCX: ffffffff858e8489 [ 275.597496] RDX: 0000000000000000 RSI: ffffffff858e893b RDI: ffff888098d655ac [ 275.604754] RBP: ffff8880aa2a6988 R08: ffff8880aa2944c0 R09: 0000000000000006 [ 275.612015] R10: ffff8880aa294e30 R11: 00000000c638f6fe R12: dffffc0000000000 [ 275.619277] R13: ffff888098d65240 R14: 0000000000000000 R15: 0000000000000000 [ 275.626619] ? hhf_dequeue+0xb9/0xa00 [ 275.630422] ? hhf_dequeue+0x56b/0xa00 [ 275.634315] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 275.639845] hhf_dequeue+0x56b/0xa00 [ 275.643593] __qdisc_run+0x1e7/0x1960 [ 275.647457] __dev_queue_xmit+0x165c/0x2fe0 [ 275.651814] ? deliver_clone+0x61/0xc0 [ 275.655695] ? br_flood+0x5fa/0x710 [ 275.659338] ? br_handle_frame_finish+0xf72/0x1510 [ 275.664277] ? netdev_pick_tx+0x300/0x300 [ 275.668469] ? run_ksoftirqd+0x8e/0x110 [ 275.672438] ? smpboot_thread_fn+0x6a3/0xa30 [ 275.676837] ? kthread+0x354/0x420 [ 275.680373] ? entry_SYSCALL_64_after_hwframe+0xbc/0xbe [ 275.685738] ? __lock_is_held+0xb6/0x140 [ 275.689832] dev_queue_xmit+0x18/0x20 [ 275.693636] ? dev_queue_xmit+0x18/0x20 [ 275.697611] br_dev_queue_push_xmit+0x405/0x5d0 [ 275.702321] ? br_nf_dev_queue_xmit+0x38c/0x1610 [ 275.707091] br_nf_dev_queue_xmit+0x365/0x1610 [ 275.711692] br_nf_post_routing+0x76f/0x12f0 [ 275.716102] ? find_inlist_lock.constprop.0+0x22a/0x230 [ 275.721461] ? br_nf_dev_queue_xmit+0x1610/0x1610 [ 275.726358] ? ipv6_skip_exthdr+0x5b0/0x5c0 [ 275.730680] ? br_nf_pre_routing_finish_bridge+0xaa0/0xaa0 [ 275.736352] nf_hook_slow+0xbc/0x1e0 [ 275.740070] br_forward_finish+0x215/0x400 [ 275.744303] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.749149] ? br_fdb_add.cold+0x8a/0x8a [ 275.753220] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 275.758297] ? nf_hook_slow+0xf0/0x1e0 [ 275.762714] br_nf_hook_thresh+0x2e9/0x370 [ 275.768005] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.773195] ? setup_pre_routing+0x470/0x470 [ 275.777599] ? find_held_lock+0x35/0x130 [ 275.781669] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.786518] br_nf_forward_finish+0x356/0x700 [ 275.791009] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.795851] br_nf_forward_ip+0x6b4/0x17c0 [ 275.800092] ? br_nf_forward_finish+0x700/0x700 [ 275.804826] ? refcount_inc_not_zero_checked+0x147/0x200 [ 275.810277] ? br_nf_hook_thresh+0x370/0x370 [ 275.814689] nf_hook_slow+0xbc/0x1e0 [ 275.818414] __br_forward+0x393/0xb30 [ 275.822221] ? br_forward_finish+0x400/0x400 [ 275.826646] ? br_dev_queue_push_xmit+0x5d0/0x5d0 [ 275.831497] deliver_clone+0x61/0xc0 [ 275.835217] br_flood+0x5fa/0x710 [ 275.838690] br_handle_frame_finish+0xf72/0x1510 [ 275.843454] ? br_handle_local_finish+0x20/0x20 [ 275.848131] ? __lock_is_held+0xb6/0x140 [ 275.852190] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 275.857202] ? nf_hook_slow+0xf0/0x1e0 [ 275.861109] br_nf_hook_thresh+0x2e9/0x370 [ 275.865351] ? br_handle_local_finish+0x20/0x20 [ 275.870021] ? setup_pre_routing+0x470/0x470 [ 275.874431] ? br_handle_local_finish+0x20/0x20 [ 275.879535] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 275.884818] br_nf_pre_routing_finish_ipv6+0x6ed/0xd70 [ 275.890967] ? br_handle_local_finish+0x20/0x20 [ 275.895650] ? kasan_check_read+0x11/0x20 [ 275.899991] br_nf_pre_routing_ipv6+0x4a5/0x8ca [ 275.904664] ? br_validate_ipv6+0xb90/0xb90 [ 275.909243] ? br_nf_pre_routing_finish.cold+0x11d/0x11d [ 275.914697] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 275.920551] ? skb_pull_rcsum+0x164/0x340 [ 275.924711] br_nf_pre_routing+0x1016/0x159c [ 275.929201] ? br_nf_pre_routing_finish+0x1960/0x1960 [ 275.934389] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 275.939921] ? ebt_broute+0x127/0x190 [ 275.943734] nf_hook_slow+0xbc/0x1e0 [ 275.947447] br_handle_frame+0x985/0x1480 [ 275.951592] ? br_handle_frame_finish+0x1510/0x1510 [ 275.956697] ? br_handle_local_finish+0x20/0x20 [ 275.961371] ? br_handle_frame_finish+0x1510/0x1510 [ 275.966386] __netif_receive_skb_core+0xac1/0x3570 [ 275.971485] ? __lock_acquire+0x6ee/0x49c0 [ 275.975722] ? netif_receive_skb+0x2d0/0x2d0 [ 275.980126] ? mark_held_locks+0x100/0x100 [ 275.984419] ? ip6_rcv_core.isra.0+0x1ac0/0x1ac0 [ 275.989179] ? ip6_rcv_finish_core.isra.0+0x560/0x560 [ 275.994366] ? process_backlog+0x482/0x7a0 [ 275.998775] __netif_receive_skb_one_core+0xa8/0x1a0 [ 276.003911] ? __netif_receive_skb_one_core+0xa8/0x1a0 [ 276.009211] ? __netif_receive_skb_core+0x3570/0x3570 [ 276.014411] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 276.020034] ? check_preemption_disabled+0x48/0x290 [ 276.025070] ? lock_acquire+0x16f/0x3f0 [ 276.029151] __netif_receive_skb+0x2c/0x1d0 [ 276.033479] process_backlog+0x23a/0x7a0 [ 276.037539] ? net_rx_action+0x27b/0x1070 [ 276.041706] ? lockdep_hardirqs_on+0x19b/0x5d0 [ 276.046293] net_rx_action+0x4f5/0x1070 [ 276.050456] ? napi_complete_done+0x500/0x500 [ 276.055002] ? sched_clock+0x2e/0x50 [ 276.058726] __do_softirq+0x25c/0x921 [ 276.062628] ? pci_mmcfg_check_reserved+0x170/0x170 [ 276.067696] ? takeover_tasklets+0x7b0/0x7b0 [ 276.072124] run_ksoftirqd+0x8e/0x110 [ 276.075926] smpboot_thread_fn+0x6a3/0xa30 [ 276.080157] ? sort_range+0x30/0x30 [ 276.083785] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 276.089313] ? __kthread_parkme+0xfb/0x1b0 [ 276.093800] kthread+0x354/0x420 [ 276.097164] ? sort_range+0x30/0x30 [ 276.100782] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 276.106325] ret_from_fork+0x24/0x30