[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.733481] random: sshd: uninitialized urandom read (32 bytes read) [ 30.972333] kauditd_printk_skb: 9 callbacks suppressed [ 30.972341] audit: type=1400 audit(1567871203.865:35): avc: denied { map } for pid=6808 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 [ 31.026965] random: sshd: uninitialized urandom read (32 bytes read) [ 31.533094] random: sshd: uninitialized urandom read (32 bytes read) [ 254.547961] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.107' (ECDSA) to the list of known hosts. [ 260.116438] random: sshd: uninitialized urandom read (32 bytes read) [ 260.238124] audit: type=1400 audit(1567871433.125:36): avc: denied { map } for pid=6822 comm="syz-executor352" path="/root/syz-executor352280721" dev="sda1" ino=2233 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 260.501117] IPVS: ftp: loaded support on port[0] = 21 [ 261.277348] chnl_net:caif_netlink_parms(): no params data found [ 261.307141] bridge0: port 1(bridge_slave_0) entered blocking state [ 261.314413] bridge0: port 1(bridge_slave_0) entered disabled state [ 261.321565] device bridge_slave_0 entered promiscuous mode [ 261.328820] bridge0: port 2(bridge_slave_1) entered blocking state [ 261.335439] bridge0: port 2(bridge_slave_1) entered disabled state [ 261.342492] device bridge_slave_1 entered promiscuous mode [ 261.356266] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 261.365237] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 261.380220] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 261.387653] team0: Port device team_slave_0 added [ 261.393527] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 261.400825] team0: Port device team_slave_1 added [ 261.405994] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 261.413381] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 261.462180] device hsr_slave_0 entered promiscuous mode [ 261.510359] device hsr_slave_1 entered promiscuous mode [ 261.550548] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 261.557569] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 261.571129] bridge0: port 2(bridge_slave_1) entered blocking state [ 261.577566] bridge0: port 2(bridge_slave_1) entered forwarding state [ 261.584515] bridge0: port 1(bridge_slave_0) entered blocking state [ 261.590886] bridge0: port 1(bridge_slave_0) entered forwarding state [ 261.616351] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 261.622708] 8021q: adding VLAN 0 to HW filter on device bond0 [ 261.633223] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 261.642310] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 261.650780] bridge0: port 1(bridge_slave_0) entered disabled state [ 261.657946] bridge0: port 2(bridge_slave_1) entered disabled state [ 261.667401] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 261.674210] 8021q: adding VLAN 0 to HW filter on device team0 [ 261.682962] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 261.690976] bridge0: port 1(bridge_slave_0) entered blocking state [ 261.697318] bridge0: port 1(bridge_slave_0) entered forwarding state [ 261.715170] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 261.725270] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 261.735815] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 261.742707] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 261.750811] bridge0: port 2(bridge_slave_1) entered blocking state [ 261.757159] bridge0: port 2(bridge_slave_1) entered forwarding state [ 261.764556] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 261.772323] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 261.779735] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 261.787541] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 261.795719] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 261.802978] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 261.814119] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 261.823656] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 366.880037] INFO: rcu_preempt self-detected stall on CPU [ 366.885568] 0-...: (1 GPs behind) idle=67e/2/0 softirq=10613/10617 fqs=4 [ 366.892561] (t=10500 jiffies g=1074 c=1073 q=23) [ 366.897482] rcu_preempt kthread starved for 10492 jiffies! g1074 c1073 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 366.908122] rcu_preempt I29776 8 2 0x80000000 [ 366.913765] Call Trace: [ 366.916439] __schedule+0x7b8/0x1cd0 [ 366.920138] ? pci_mmcfg_check_reserved+0x150/0x150 [ 366.925136] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 366.930221] schedule+0x92/0x1c0 [ 366.933582] schedule_timeout+0x43e/0xe10 [ 366.937802] ? usleep_range+0x130/0x130 [ 366.941757] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 366.946872] ? prepare_to_swait+0xcc/0x100 [ 366.951089] ? call_timer_fn+0x670/0x670 [ 366.955136] rcu_gp_kthread+0xbf4/0x1ec0 [ 366.959190] ? force_qs_rnp+0x4d0/0x4d0 [ 366.963152] kthread+0x319/0x430 [ 366.966497] ? force_qs_rnp+0x4d0/0x4d0 [ 366.970452] ? kthread_create_on_node+0xd0/0xd0 [ 366.975102] ret_from_fork+0x24/0x30 [ 366.978949] NMI backtrace for cpu 0 [ 366.982749] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.142 #0 [ 366.988961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 366.998383] Call Trace: [ 367.000948] [ 367.003144] dump_stack+0x138/0x197 [ 367.006754] nmi_cpu_backtrace.cold+0x57/0x94 [ 367.011233] ? irq_force_complete_move.cold+0x7d/0x7d [ 367.016418] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 367.021680] arch_trigger_cpumask_backtrace+0x14/0x20 [ 367.026852] rcu_dump_cpu_stacks+0x186/0x1d2 [ 367.031261] rcu_check_callbacks.cold+0x43d/0xd0a [ 367.036096] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 367.041532] update_process_times+0x31/0x70 [ 367.045847] tick_sched_handle+0x85/0x160 [ 367.049977] tick_sched_timer+0x43/0x130 [ 367.054024] __hrtimer_run_queues+0x270/0xbc0 [ 367.058502] ? tick_sched_do_timer+0xe0/0xe0 [ 367.062896] ? hrtimer_start_range_ns+0x10d0/0x10d0 [ 367.067897] hrtimer_interrupt+0x1d8/0x5d0 [ 367.072167] smp_apic_timer_interrupt+0x11c/0x5e0 [ 367.077686] apic_timer_interrupt+0x96/0xa0 [ 367.082028] RIP: 0010:hhf_dequeue+0x66b/0xa60 [ 367.086504] RSP: 0018:ffff8880aee07700 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 367.094192] RAX: 1ffff110147db8d0 RBX: ffff8880a3edc678 RCX: 0000000000000000 [ 367.101449] RDX: 0000000000000100 RSI: ffff8880a3edc710 RDI: ffff8880a3edc680 [ 367.108805] RBP: ffff8880aee07750 R08: 0000000000000000 R09: ffffffff87676ba8 [ 367.116057] R10: ffffffff87676b88 R11: ffffffff87676240 R12: dffffc0000000000 [ 367.123309] R13: ffff8880a3edc480 R14: ffff8880a3edc710 R15: ffff8880a3edc700 [ 367.130662] __qdisc_run+0x2b8/0xe00 [ 367.134414] __dev_queue_xmit+0x1571/0x25e0 [ 367.138766] ? ipv6_chk_mcast_addr+0x295/0x600 [ 367.143332] ? netdev_pick_tx+0x300/0x300 [ 367.147461] ? find_held_lock+0x35/0x130 [ 367.151546] ? ip6_finish_output+0x4f4/0xb50 [ 367.155943] ? mark_held_locks+0xb1/0x100 [ 367.160085] dev_queue_xmit+0x18/0x20 [ 367.163865] ? dev_queue_xmit+0x18/0x20 [ 367.167818] ip6_finish_output2+0x10bd/0x21b0 [ 367.172296] ? find_held_lock+0x35/0x130 [ 367.176340] ? ip6_forward_finish+0x480/0x480 [ 367.180823] ? lock_downgrade+0x6e0/0x6e0 [ 367.184966] ip6_finish_output+0x4f4/0xb50 [ 367.189198] ? ip6_finish_output+0x4f4/0xb50 [ 367.193593] ip6_output+0x20f/0x6d0 [ 367.197211] ? ip6_finish_output+0xb50/0xb50 [ 367.201600] ? _raw_spin_unlock_bh+0x31/0x40 [ 367.205993] ? ip6_fragment+0x32c0/0x32c0 [ 367.210210] ? icmp6_dst_alloc+0x38e/0x580 [ 367.214589] mld_sendpack+0x8d1/0xd60 [ 367.218374] ? nf_hook.constprop.0+0x2c0/0x2c0 [ 367.222955] ? mld_ifc_timer_expire+0x3a4/0x7b0 [ 367.227607] ? trace_hardirqs_on+0xd/0x10 [ 367.231735] ? __local_bh_enable_ip+0x99/0x1a0 [ 367.236310] mld_ifc_timer_expire+0x3b6/0x7b0 [ 367.240803] call_timer_fn+0x161/0x670 [ 367.244761] ? mld_dad_timer_expire+0x180/0x180 [ 367.249420] ? __next_timer_interrupt+0x140/0x140 [ 367.254264] ? trace_hardirqs_on_caller+0x19b/0x590 [ 367.259263] run_timer_softirq+0x5b4/0x1570 [ 367.263711] ? mld_dad_timer_expire+0x180/0x180 [ 367.268375] ? add_timer+0xae0/0xae0 [ 367.272081] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 367.277629] __do_softirq+0x244/0x9a0 [ 367.281416] ? sched_clock+0x2e/0x50 [ 367.285122] irq_exit+0x160/0x1b0 [ 367.288567] smp_apic_timer_interrupt+0x146/0x5e0 [ 367.293395] apic_timer_interrupt+0x96/0xa0 [ 367.297778] [ 367.300005] RIP: 0010:native_safe_halt+0xe/0x10 [ 367.304741] RSP: 0018:ffffffff87607de8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 367.312433] RAX: 1ffffffff0ee2a84 RBX: ffffffff87676240 RCX: 0000000000000000 [ 367.319693] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff87676abc [ 367.326947] RBP: ffffffff87607e10 R08: 1ffffffff104a601 R09: 0000000000000000 [ 367.334198] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87715410 [ 367.341558] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87676240 [ 367.348914] ? default_idle+0x4c/0x370 [ 367.352785] arch_cpu_idle+0xa/0x10 [ 367.356401] default_idle_call+0x36/0x90 [ 367.360528] do_idle+0x262/0x3d0 [ 367.363877] cpu_startup_entry+0x1b/0x20 [ 367.367921] rest_init+0x1d9/0x1e2 [ 367.371503] ? trace_event_define_fields_x86_irq_vector+0x2c/0x2c [ 367.377766] start_kernel+0x6df/0x6fd [ 367.381552] ? mem_encrypt_init+0xb/0xb [ 367.385507] ? x86_family+0x32/0x40 [ 367.389147] ? load_ucode_bsp+0x1ea/0x1f6 [ 367.393296] x86_64_start_reservations+0x29/0x2b [ 367.398046] x86_64_start_kernel+0x77/0x7b [ 367.402276] secondary_startup_64+0xa5/0xb0 [ 367.410023] INFO: rcu_sched detected stalls on CPUs/tasks: [ 367.415870] 0-...: (10502 ticks this GP) idle=67e/1/0 softirq=10617/10617 fqs=0 [ 367.423646] (detected by 1, t=10554 jiffies, g=700, c=699, q=1) [ 367.430071] Sending NMI from CPU 1 to CPUs 0: [ 367.435233] NMI backtrace for cpu 0 [ 367.435237] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.142 #0 [ 367.435240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 367.435243] task: ffffffff87676240 task.stack: ffffffff87600000 [ 367.435245] RIP: 0010:__list_add_valid+0x2b/0xa0 [ 367.435247] RSP: 0018:ffff8880aee076d8 EFLAGS: 00000246 [ 367.435251] RAX: dffffc0000000000 RBX: ffff8880a3edc678 RCX: 0000000000000000 [ 367.435254] RDX: 1ffff110147db8e3 RSI: ffff8880a3edc710 RDI: ffff8880a3edc718 [ 367.435257] RBP: ffff8880aee076f0 R08: 0000000000000000 R09: ffffffff87676ba8 [ 367.435260] R10: ffffffff87676b88 R11: ffffffff87676240 R12: ffff8880a3edc710 [ 367.435263] R13: ffff8880a3edc678 R14: ffff8880a3edc710 R15: ffff8880a3edc700 [ 367.435266] FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 [ 367.435268] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 367.435271] CR2: 00000000004c71e8 CR3: 000000000766a000 CR4: 00000000001406f0 [ 367.435274] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 367.435277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 367.435278] Call Trace: [ 367.435280] [ 367.435281] hhf_dequeue+0x61b/0xa60 [ 367.435283] __qdisc_run+0x2b8/0xe00 [ 367.435285] __dev_queue_xmit+0x1571/0x25e0 [ 367.435287] ? ipv6_chk_mcast_addr+0x295/0x600 [ 367.435289] ? netdev_pick_tx+0x300/0x300 [ 367.435292] ? find_held_lock+0x35/0x130 [ 367.435294] ? ip6_finish_output+0x4f4/0xb50 [ 367.435296] ? mark_held_locks+0xb1/0x100 [ 367.435297] dev_queue_xmit+0x18/0x20 [ 367.435299] ? dev_queue_xmit+0x18/0x20 [ 367.435301] ip6_finish_output2+0x10bd/0x21b0 [ 367.435303] ? find_held_lock+0x35/0x130 [ 367.435305] ? ip6_forward_finish+0x480/0x480 [ 367.435307] ? lock_downgrade+0x6e0/0x6e0 [ 367.435309] ip6_finish_output+0x4f4/0xb50 [ 367.435311] ? ip6_finish_output+0x4f4/0xb50 [ 367.435313] ip6_output+0x20f/0x6d0 [ 367.435315] ? ip6_finish_output+0xb50/0xb50 [ 367.435317] ? _raw_spin_unlock_bh+0x31/0x40 [ 367.435319] ? ip6_fragment+0x32c0/0x32c0 [ 367.435321] ? icmp6_dst_alloc+0x38e/0x580 [ 367.435323] mld_sendpack+0x8d1/0xd60 [ 367.435325] ? nf_hook.constprop.0+0x2c0/0x2c0 [ 367.435327] ? mld_ifc_timer_expire+0x3a4/0x7b0 [ 367.435329] ? trace_hardirqs_on+0xd/0x10 [ 367.435331] ? __local_bh_enable_ip+0x99/0x1a0 [ 367.435333] mld_ifc_timer_expire+0x3b6/0x7b0 [ 367.435335] call_timer_fn+0x161/0x670 [ 367.435337] ? mld_dad_timer_expire+0x180/0x180 [ 367.435339] ? __next_timer_interrupt+0x140/0x140 [ 367.435341] ? trace_hardirqs_on_caller+0x19b/0x590 [ 367.435343] run_timer_softirq+0x5b4/0x1570 [ 367.435345] ? mld_dad_timer_expire+0x180/0x180 [ 367.435347] ? add_timer+0xae0/0xae0 [ 367.435350] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 367.435352] __do_softirq+0x244/0x9a0 [ 367.435354] ? sched_clock+0x2e/0x50 [ 367.435356] irq_exit+0x160/0x1b0 [ 367.435358] smp_apic_timer_interrupt+0x146/0x5e0 [ 367.435360] apic_timer_interrupt+0x96/0xa0 [ 367.435362] [ 367.435364] RIP: 0010:native_safe_halt+0xe/0x10 [ 367.435366] RSP: 0018:ffffffff87607de8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 367.435371] RAX: 1ffffffff0ee2a84 RBX: ffffffff87676240 RCX: 0000000000000000 [ 367.435373] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff87676abc [ 367.435376] RBP: ffffffff87607e10 R08: 1ffffffff104a601 R09: 0000000000000000 [ 367.435379] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87715410 [ 367.435382] R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87676240 [ 367.435383] ? default_idle+0x4c/0x370 [ 367.435385] arch_cpu_idle+0xa/0x10 [ 367.435387] default_idle_call+0x36/0x90 [ 367.435389] do_idle+0x262/0x3d0 [ 367.435391] cpu_startup_entry+0x1b/0x20 [ 367.435393] rest_init+0x1d9/0x1e2 [ 367.435395] ? trace_event_define_fields_x86_irq_vector+0x2c/0x2c [ 367.435397] start_kernel+0x6df/0x6fd [ 367.435399] ? mem_encrypt_init+0xb/0xb [ 367.435401] ? x86_family+0x32/0x40 [ 367.435403] ? load_ucode_bsp+0x1ea/0x1f6 [ 367.435406] x86_64_start_reservations+0x29/0x2b [ 367.435408] x86_64_start_kernel+0x77/0x7b [ 367.435410] secondary_startup_64+0xa5/0xb0 [ 367.435411] Code: 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 c1 ea 03 80 3c 02 00 <75> 52 49 8b 54 24 08 48 39 f2 0f 85 5a 01 00 00 48 b8 00 00 00 [ 367.435665] rcu_sched kthread starved for 10555 jiffies! g700 c699 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 367.856943] rcu_sched I29824 9 2 0x80000000 [ 367.862748] Call Trace: [ 367.866116] __schedule+0x7b8/0x1cd0 [ 367.869826] ? pci_mmcfg_check_reserved+0x150/0x150 [ 367.874832] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 367.879928] schedule+0x92/0x1c0 [ 367.883287] schedule_timeout+0x43e/0xe10 [ 367.887425] ? usleep_range+0x130/0x130 [ 367.891402] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 367.896503] ? prepare_to_swait+0xcc/0x100 [ 367.900784] ? call_timer_fn+0x670/0x670 [ 367.904843] rcu_gp_kthread+0xbf4/0x1ec0 [ 367.909006] ? force_qs_rnp+0x4d0/0x4d0 [ 367.912980] kthread+0x319/0x430 [ 367.916335] ? force_qs_rnp+0x4d0/0x4d0 [ 367.920301] ? kthread_create_on_node+0xd0/0xd0 [ 367.924963] ret_from_fork+0x24/0x30