[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [[ 36.518151] audit: type=1800 audit(1568603128.937:33): pid=7255 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 ....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 40.378153] kauditd_printk_skb: 1 callbacks suppressed [ 40.378167] audit: type=1400 audit(1568603132.797:35): avc: denied { map } for pid=7427 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 '10.128.0.44' (ECDSA) to the list of known hosts. [ 91.278668] audit: type=1400 audit(1568603183.697:36): avc: denied { map } for pid=7440 comm="syz-executor591" path="/root/syz-executor591408789" 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 [ 91.299293] IPVS: ftp: loaded support on port[0] = 21 [ 91.364451] chnl_net:caif_netlink_parms(): no params data found [ 91.395001] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.402520] bridge0: port 1(bridge_slave_0) entered disabled state [ 91.409627] device bridge_slave_0 entered promiscuous mode [ 91.416597] bridge0: port 2(bridge_slave_1) entered blocking state [ 91.423026] bridge0: port 2(bridge_slave_1) entered disabled state [ 91.429957] device bridge_slave_1 entered promiscuous mode [ 91.444426] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 91.453636] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 91.471119] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 91.478573] team0: Port device team_slave_0 added [ 91.483885] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 91.491143] team0: Port device team_slave_1 added [ 91.496261] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 91.503583] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 91.559144] device hsr_slave_0 entered promiscuous mode [ 91.607916] device hsr_slave_1 entered promiscuous mode [ 91.647897] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 91.654823] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 91.668193] bridge0: port 2(bridge_slave_1) entered blocking state [ 91.674586] bridge0: port 2(bridge_slave_1) entered forwarding state [ 91.681477] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.687865] bridge0: port 1(bridge_slave_0) entered forwarding state [ 91.716761] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 91.722895] 8021q: adding VLAN 0 to HW filter on device bond0 [ 91.730943] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 91.740097] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 91.759668] bridge0: port 1(bridge_slave_0) entered disabled state [ 91.766662] bridge0: port 2(bridge_slave_1) entered disabled state [ 91.774092] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 91.783726] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 91.790380] 8021q: adding VLAN 0 to HW filter on device team0 [ 91.799144] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 91.806797] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.813210] bridge0: port 1(bridge_slave_0) entered forwarding state [ 91.823116] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 91.831045] bridge0: port 2(bridge_slave_1) entered blocking state [ 91.837433] bridge0: port 2(bridge_slave_1) entered forwarding state [ 91.851968] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 91.859730] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 91.869915] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 91.882093] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 91.892748] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 91.903182] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 91.910373] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready executing program [ 91.918038] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 91.925535] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 91.936712] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 91.946388] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 197.027286] rcu: INFO: rcu_preempt self-detected stall on CPU [ 197.033412] rcu: 1-...!: (10499 ticks this GP) idle=7fa/0/0x3 softirq=10034/10034 fqs=2 [ 197.041978] rcu: (t=10500 jiffies g=4809 q=83) [ 197.046728] rcu: rcu_preempt kthread starved for 10495 jiffies! g4809 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 [ 197.057105] rcu: RCU grace-period kthread stack dump: [ 197.062404] rcu_preempt R running task 29424 10 2 0x80000000 [ 197.069594] Call Trace: [ 197.072176] __schedule+0x866/0x1dc0 [ 197.075884] ? pci_mmcfg_check_reserved+0x170/0x170 [ 197.080888] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 197.085982] ? lockdep_hardirqs_on+0x415/0x5d0 [ 197.090571] ? trace_hardirqs_on+0x67/0x220 [ 197.094889] schedule+0x92/0x1c0 [ 197.098247] schedule_timeout+0x4db/0xfc0 [ 197.102400] ? usleep_range+0x170/0x170 [ 197.106365] ? trace_hardirqs_on+0x67/0x220 [ 197.110695] ? kasan_check_read+0x11/0x20 [ 197.114944] ? __next_timer_interrupt+0x1a0/0x1a0 [ 197.119781] ? prepare_to_swait_exclusive+0x120/0x120 [ 197.124968] rcu_gp_kthread+0xd5c/0x2190 [ 197.129045] ? rcu_blocking_is_gp+0x90/0x90 [ 197.133358] ? trace_hardirqs_on+0x67/0x220 [ 197.137668] ? kasan_check_read+0x11/0x20 [ 197.141805] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 197.146913] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 197.152444] ? __kthread_parkme+0xfb/0x1b0 [ 197.156673] kthread+0x354/0x420 [ 197.160028] ? rcu_blocking_is_gp+0x90/0x90 [ 197.164339] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 197.169870] ret_from_fork+0x24/0x30 [ 197.173600] NMI backtrace for cpu 1 [ 197.177217] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.19.72 #0 [ 197.183356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 197.192715] Call Trace: [ 197.195299] [ 197.197442] dump_stack+0x172/0x1f0 [ 197.201060] nmi_cpu_backtrace.cold+0x63/0xa4 [ 197.205561] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 197.210491] nmi_trigger_cpumask_backtrace+0x1b0/0x1f8 [ 197.215760] arch_trigger_cpumask_backtrace+0x14/0x20 [ 197.220941] rcu_dump_cpu_stacks+0x189/0x1d5 [ 197.225340] ? wake_up_process+0x10/0x20 [ 197.229443] rcu_check_callbacks.cold+0x5e3/0xd90 [ 197.234279] ? trace_hardirqs_off+0x62/0x220 [ 197.238686] update_process_times+0x32/0x80 [ 197.242996] tick_sched_handle+0xa2/0x190 [ 197.247150] tick_sched_timer+0x47/0x130 [ 197.251205] __hrtimer_run_queues+0x33b/0xdc0 [ 197.255688] ? tick_sched_do_timer+0x1b0/0x1b0 [ 197.260279] ? hrtimer_fixup_activate+0x30/0x30 [ 197.264942] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 197.269949] ? ktime_get_update_offsets_now+0x2d3/0x440 [ 197.275305] hrtimer_interrupt+0x314/0x770 [ 197.279625] smp_apic_timer_interrupt+0x111/0x550 [ 197.284457] apic_timer_interrupt+0xf/0x20 [ 197.288712] RIP: 0010:__list_add_valid+0xe/0xa0 [ 197.293378] Code: 40 48 82 87 e8 33 fd ff ff 41 5c 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 <41> 55 49 89 fd 48 8d 7a 08 41 54 49 89 d4 48 89 fa 48 83 ec 08 48 [ 197.312272] RSP: 0018:ffff8880ae907608 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 [ 197.319986] RAX: dffffc0000000000 RBX: ffff88808985b4b8 RCX: ffffffff858e7de6 [ 197.327342] RDX: ffff88808985b550 RSI: ffff88808985b550 RDI: ffff88808985b4b8 [ 197.334595] RBP: ffff8880ae907608 R08: ffff8880aa2703c0 R09: 0000000000000005 [ 197.341849] R10: ffff8880aa270d08 R11: 0000000089c67b01 R12: dffffc0000000000 [ 197.349132] R13: ffff88808985b200 R14: ffff88808985b558 R15: ffff88808985b550 [ 197.356403] ? apic_timer_interrupt+0xa/0x20 [ 197.360803] ? hhf_dequeue+0x5b6/0xa00 [ 197.364694] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 197.370220] hhf_dequeue+0x652/0xa00 [ 197.373923] __qdisc_run+0x1e7/0x1960 [ 197.377739] __dev_queue_xmit+0x165c/0x2fe0 [ 197.382073] ? mark_held_locks+0x100/0x100 [ 197.386298] ? netdev_pick_tx+0x300/0x300 [ 197.390451] ? ip6_finish_output+0x574/0xbe0 [ 197.394851] ? find_held_lock+0x35/0x130 [ 197.398905] ? ip6_finish_output+0x574/0xbe0 [ 197.403313] ? mark_held_locks+0xb1/0x100 [ 197.407454] ? ip6_finish_output2+0x1784/0x2550 [ 197.412112] ? ip6_finish_output+0x574/0xbe0 [ 197.416510] ? ip6_finish_output2+0x1784/0x2550 [ 197.421171] dev_queue_xmit+0x18/0x20 [ 197.424959] ? dev_queue_xmit+0x18/0x20 [ 197.428926] ip6_finish_output2+0x12fd/0x2550 [ 197.433409] ? ip6_mtu+0x2e6/0x460 [ 197.436958] ? ip6_forward_finish+0x4d0/0x4d0 [ 197.441440] ? lock_downgrade+0x810/0x810 [ 197.445578] ? kasan_check_read+0x11/0x20 [ 197.449722] ip6_finish_output+0x574/0xbe0 [ 197.453943] ? ip6_finish_output+0x574/0xbe0 [ 197.458341] ip6_output+0x235/0x7c0 [ 197.461957] ? ip6_finish_output+0xbe0/0xbe0 [ 197.466356] ? ip6_fragment+0x3770/0x3770 [ 197.470491] ? icmp6_dst_alloc+0x432/0x660 [ 197.474716] mld_sendpack+0x9d3/0xeb0 [ 197.478508] ? nf_hook.constprop.0+0x560/0x560 [ 197.483082] ? mld_ifc_timer_expire+0x437/0x8a0 [ 197.487740] ? __local_bh_enable_ip+0x15a/0x270 [ 197.492397] mld_ifc_timer_expire+0x449/0x8a0 [ 197.496915] call_timer_fn+0x18d/0x720 [ 197.500805] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 197.505466] ? process_timeout+0x40/0x40 [ 197.509511] ? run_timer_softirq+0x647/0x1700 [ 197.513997] ? trace_hardirqs_on+0x67/0x220 [ 197.518313] ? kasan_check_read+0x11/0x20 [ 197.522454] ? mld_dad_timer_expire+0x1c0/0x1c0 [ 197.527123] run_timer_softirq+0x652/0x1700 [ 197.531440] ? add_timer+0xbe0/0xbe0 [ 197.535249] ? kvm_clock_read+0x18/0x30 [ 197.539212] ? check_preemption_disabled+0x48/0x290 [ 197.544213] ? sched_clock+0x2e/0x50 [ 197.547928] __do_softirq+0x25c/0x921 [ 197.551716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 197.557260] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 197.562794] irq_exit+0x180/0x1d0 [ 197.566237] smp_apic_timer_interrupt+0x13b/0x550 [ 197.571069] apic_timer_interrupt+0xf/0x20 [ 197.575284] [ 197.577506] RIP: 0010:native_safe_halt+0xe/0x10 [ 197.582162] Code: ff ff 48 89 df e8 72 12 ae fa eb 82 e9 07 00 00 00 0f 00 2d 94 03 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d 84 03 54 00 fb f4 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be f4 65 fa e8 69 [ 197.601048] RSP: 0018:ffff8880aa27fd00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 197.608867] RAX: 1ffffffff10e48c4 RBX: ffff8880aa2703c0 RCX: 0000000000000000 [ 197.616120] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff8880aa270c3c [ 197.623372] RBP: ffff8880aa27fd30 R08: ffff8880aa2703c0 R09: 0000000000000000 [ 197.630629] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 197.637883] R13: ffffffff88724610 R14: 0000000000000001 R15: 0000000000000000 [ 197.645175] ? default_idle+0x4e/0x320 [ 197.649054] arch_cpu_idle+0xa/0x10 [ 197.652693] default_idle_call+0x36/0x90 [ 197.656740] do_idle+0x377/0x560 [ 197.660098] ? arch_cpu_idle_exit+0x80/0x80 [ 197.664407] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 197.669496] ? complete+0x61/0x80 [ 197.672949] cpu_startup_entry+0xc8/0xe0 [ 197.676992] ? cpu_in_idle+0x20/0x20 [ 197.680696] ? setup_APIC_timer+0x1aa/0x200 [ 197.685005] start_secondary+0x3e8/0x5b0 [ 197.689052] ? set_cpu_sibling_map+0x1860/0x1860 [ 197.693801] secondary_startup_64+0xa4/0xb0