[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.733002] random: sshd: uninitialized urandom read (32 bytes read) [ 34.072067] kauditd_printk_skb: 9 callbacks suppressed [ 34.072075] audit: type=1400 audit(1567842049.975:35): avc: denied { map } for pid=6880 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 [ 34.140728] random: sshd: uninitialized urandom read (32 bytes read) [ 34.714804] random: sshd: uninitialized urandom read (32 bytes read) [ 226.070293] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.1.36' (ECDSA) to the list of known hosts. [ 231.672615] random: sshd: uninitialized urandom read (32 bytes read) [ 231.787317] audit: type=1400 audit(1567842247.685:36): avc: denied { map } for pid=6893 comm="syz-executor299" path="/root/syz-executor299654459" 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 [ 232.020835] IPVS: ftp: loaded support on port[0] = 21 [ 232.819322] chnl_net:caif_netlink_parms(): no params data found [ 232.847854] bridge0: port 1(bridge_slave_0) entered blocking state [ 232.854558] bridge0: port 1(bridge_slave_0) entered disabled state [ 232.861602] device bridge_slave_0 entered promiscuous mode [ 232.868240] bridge0: port 2(bridge_slave_1) entered blocking state [ 232.874680] bridge0: port 2(bridge_slave_1) entered disabled state [ 232.881463] device bridge_slave_1 entered promiscuous mode [ 232.894961] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 232.903704] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 232.918083] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 232.925342] team0: Port device team_slave_0 added [ 232.931026] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 232.937973] team0: Port device team_slave_1 added [ 232.943227] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 232.950387] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 233.011629] device hsr_slave_0 entered promiscuous mode [ 233.050302] device hsr_slave_1 entered promiscuous mode [ 233.100576] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 233.107433] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 233.120831] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.127241] bridge0: port 2(bridge_slave_1) entered forwarding state [ 233.134138] bridge0: port 1(bridge_slave_0) entered blocking state [ 233.140515] bridge0: port 1(bridge_slave_0) entered forwarding state [ 233.165058] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 233.171593] 8021q: adding VLAN 0 to HW filter on device bond0 [ 233.178977] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 233.187022] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 233.206244] bridge0: port 1(bridge_slave_0) entered disabled state [ 233.213215] bridge0: port 2(bridge_slave_1) entered disabled state [ 233.223073] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 233.229176] 8021q: adding VLAN 0 to HW filter on device team0 [ 233.237027] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 233.244987] bridge0: port 1(bridge_slave_0) entered blocking state [ 233.251385] bridge0: port 1(bridge_slave_0) entered forwarding state [ 233.259659] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 233.267233] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.273588] bridge0: port 2(bridge_slave_1) entered forwarding state [ 233.287563] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 233.295765] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 233.304643] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 233.314315] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 233.323902] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 233.333511] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 233.339527] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 233.351545] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 233.361186] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 338.420039] INFO: rcu_preempt self-detected stall on CPU [ 338.425551] 1-...: (10500 ticks this GP) idle=0de/140000000000002/0 softirq=14531/14531 fqs=0 [ 338.434360] (t=10500 jiffies g=1061 c=1060 q=243) [ 338.439363] rcu_preempt kthread starved for 10500 jiffies! g1061 c1060 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 338.450001] rcu_preempt I29824 8 2 0x80000000 [ 338.455642] Call Trace: [ 338.458288] __schedule+0x7b8/0x1cd0 [ 338.462001] ? pci_mmcfg_check_reserved+0x150/0x150 [ 338.467011] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 338.472097] schedule+0x92/0x1c0 [ 338.475444] schedule_timeout+0x43e/0xe10 [ 338.479583] ? usleep_range+0x130/0x130 [ 338.483540] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 338.488685] ? prepare_to_swait+0xcc/0x100 [ 338.492905] ? call_timer_fn+0x670/0x670 [ 338.496950] rcu_gp_kthread+0xbf4/0x1ec0 [ 338.501013] ? force_qs_rnp+0x4d0/0x4d0 [ 338.504977] kthread+0x319/0x430 [ 338.508331] ? force_qs_rnp+0x4d0/0x4d0 [ 338.512282] ? kthread_create_on_node+0xd0/0xd0 [ 338.516931] ret_from_fork+0x24/0x30 [ 338.520782] NMI backtrace for cpu 1 [ 338.524557] CPU: 1 PID: 6921 Comm: syz-executor299 Not tainted 4.14.142 #0 [ 338.531545] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 338.540884] Call Trace: [ 338.543464] [ 338.545667] dump_stack+0x138/0x197 [ 338.549280] nmi_cpu_backtrace.cold+0x57/0x94 [ 338.553764] ? irq_force_complete_move.cold+0x7d/0x7d [ 338.558936] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 338.564194] arch_trigger_cpumask_backtrace+0x14/0x20 [ 338.569364] rcu_dump_cpu_stacks+0x186/0x1d2 [ 338.573769] rcu_check_callbacks.cold+0x43d/0xd0a [ 338.578594] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 338.584037] update_process_times+0x31/0x70 [ 338.588339] tick_sched_handle+0x85/0x160 [ 338.592468] tick_sched_timer+0x43/0x130 [ 338.596511] __hrtimer_run_queues+0x270/0xbc0 [ 338.600989] ? tick_sched_do_timer+0xe0/0xe0 [ 338.605378] ? hrtimer_start_range_ns+0x10d0/0x10d0 [ 338.610374] hrtimer_interrupt+0x1d8/0x5d0 [ 338.614635] smp_apic_timer_interrupt+0x11c/0x5e0 [ 338.619462] apic_timer_interrupt+0x96/0xa0 [ 338.623788] RIP: 0010:hhf_dequeue+0x51a/0xa60 [ 338.628258] RSP: 0018:ffff8880aef071c0 EFLAGS: 00000a07 ORIG_RAX: ffffffffffffff10 [ 338.635956] RAX: 0000000000000000 RBX: ffff888077f521f8 RCX: 0000000000000000 [ 338.643210] RDX: 1ffff1100efea455 RSI: ffff888077f52290 RDI: ffff888077f522ac [ 338.650459] RBP: ffff8880aef07210 R08: 0000000000000000 R09: ffff888092112bf8 [ 338.657705] R10: ffff888092112bd8 R11: ffff888092112240 R12: dffffc0000000000 [ 338.664953] R13: ffff888077f52000 R14: 0000000000000001 R15: ffff888077f52280 [ 338.672271] __qdisc_run+0x2b8/0xe00 [ 338.675987] __dev_queue_xmit+0x1571/0x25e0 [ 338.680290] ? __lock_is_held+0xb6/0x140 [ 338.684329] ? check_preemption_disabled+0x3c/0x250 [ 338.689337] ? netdev_pick_tx+0x300/0x300 [ 338.693548] ? save_trace+0x290/0x290 [ 338.697357] ? br_nf_post_routing+0x27d/0xf00 [ 338.701848] ? br_forward_finish+0x1cc/0x320 [ 338.706237] ? find_held_lock+0x35/0x130 [ 338.710277] ? br_forward_finish+0x1cc/0x320 [ 338.714667] dev_queue_xmit+0x18/0x20 [ 338.718444] ? dev_queue_xmit+0x18/0x20 [ 338.722397] br_dev_queue_push_xmit+0x367/0x530 [ 338.727047] br_forward_finish+0xbc/0x320 [ 338.731172] ? br_dev_queue_push_xmit+0x530/0x530 [ 338.735994] ? br_fdb_add.cold+0x84/0x84 [ 338.740037] __br_forward+0x560/0x9c0 [ 338.743817] ? br_forward_finish+0x320/0x320 [ 338.748205] ? br_dev_queue_push_xmit+0x530/0x530 [ 338.753031] deliver_clone+0x61/0xc0 [ 338.756722] br_flood+0x3c8/0x530 [ 338.760156] br_dev_xmit+0x9a4/0xd40 [ 338.763845] ? check_preemption_disabled+0x3c/0x250 [ 338.768836] ? br_poll_controller+0x10/0x10 [ 338.773134] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 338.778573] dev_hard_start_xmit+0x18c/0x8b0 [ 338.782962] ? assoc_array_gc+0x1130/0x11d0 [ 338.787264] __dev_queue_xmit+0x1d95/0x25e0 [ 338.791614] ? ipv6_chk_mcast_addr+0x295/0x600 [ 338.796180] ? netdev_pick_tx+0x300/0x300 [ 338.800310] ? find_held_lock+0x35/0x130 [ 338.804366] ? ip6_finish_output+0x4f4/0xb50 [ 338.808757] ? mark_held_locks+0xb1/0x100 [ 338.812884] dev_queue_xmit+0x18/0x20 [ 338.816664] ? dev_queue_xmit+0x18/0x20 [ 338.820619] ip6_finish_output2+0x10bd/0x21b0 [ 338.825115] ? find_held_lock+0x35/0x130 [ 338.829162] ? ip6_forward_finish+0x480/0x480 [ 338.833639] ? lock_downgrade+0x6e0/0x6e0 [ 338.837779] ip6_finish_output+0x4f4/0xb50 [ 338.842002] ? ip6_finish_output+0x4f4/0xb50 [ 338.846397] ip6_output+0x20f/0x6d0 [ 338.850011] ? ip6_finish_output+0xb50/0xb50 [ 338.854411] ? _raw_spin_unlock_bh+0x31/0x40 [ 338.858803] ? ip6_fragment+0x32c0/0x32c0 [ 338.862930] ? icmp6_dst_alloc+0x38e/0x580 [ 338.867146] mld_sendpack+0x8d1/0xd60 [ 338.870927] ? nf_hook.constprop.0+0x2c0/0x2c0 [ 338.875491] ? mld_ifc_timer_expire+0x3a4/0x7b0 [ 338.880139] ? trace_hardirqs_on+0xd/0x10 [ 338.884266] ? __local_bh_enable_ip+0x99/0x1a0 [ 338.888825] mld_ifc_timer_expire+0x3b6/0x7b0 [ 338.893302] call_timer_fn+0x161/0x670 [ 338.897166] ? mld_dad_timer_expire+0x180/0x180 [ 338.901815] ? __next_timer_interrupt+0x140/0x140 [ 338.906635] ? trace_hardirqs_on_caller+0x19b/0x590 [ 338.911631] run_timer_softirq+0x5b4/0x1570 [ 338.915928] ? mld_dad_timer_expire+0x180/0x180 [ 338.920577] ? add_timer+0xae0/0xae0 [ 338.924275] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 338.929710] __do_softirq+0x244/0x9a0 [ 338.933488] ? sched_clock+0x2e/0x50 [ 338.937188] irq_exit+0x160/0x1b0 [ 338.940622] smp_apic_timer_interrupt+0x146/0x5e0 [ 338.945445] apic_timer_interrupt+0x96/0xa0 [ 338.949740] [ 338.951960] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 [ 338.957036] RSP: 0018:ffff88808d8afec8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 338.964720] RAX: 1ffffffff0ee2a83 RBX: ffff888092112240 RCX: 0000000000000000 [ 338.971969] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888092112abc [ 338.979215] RBP: ffff88808d8afed0 R08: ffff888092112240 R09: 0000000000000000 [ 338.986471] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aef2c500 [ 338.993720] R13: ffff8880a9d1c340 R14: ffff888077848040 R15: ffff8880aef2ce58 [ 339.000978] ? _raw_spin_unlock_irq+0x28/0x90 [ 339.005450] finish_task_switch+0x178/0x650 [ 339.009747] ? finish_task_switch+0x14d/0x650 [ 339.014221] ? compat_start_thread+0x80/0x80 [ 339.018607] schedule_tail+0xe/0x120 [ 339.022310] ret_from_fork+0x8/0x30 [ 339.025915] RIP: 0033:0x440cca [ 339.029083] RSP: 002b:00007ffe0ddbb510 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 339.036766] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000440cca [ 339.044013] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 339.051260] RBP: 00007ffe0ddbb530 R08: 0000000000000001 R09: 0000000001a3a880 [ 339.058516] R10: 0000000001a3ab50 R11: 0000000000000246 R12: 0000000000000001 [ 339.065763] R13: 00000000004032e0 R14: 0000000000000000 R15: 0000000000000000 [ 339.080018] INFO: rcu_sched detected stalls on CPUs/tasks: [ 339.085656] 1-...: (10502 ticks this GP) idle=0de/140000000000001/0 softirq=14531/14531 fqs=0 [ 339.094471] (detected by 0, t=10567 jiffies, g=756, c=755, q=11) [ 339.100698] Sending NMI from CPU 0 to CPUs 1: [ 339.105787] NMI backtrace for cpu 1 [ 339.105791] CPU: 1 PID: 6921 Comm: syz-executor299 Not tainted 4.14.142 #0 [ 339.105794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 339.105797] task: ffff888092112240 task.stack: ffff88808d8a8000 [ 339.105799] RIP: 0010:__list_del_entry_valid+0xa6/0xf5 [ 339.105801] RSP: 0018:ffff8880aef07198 EFLAGS: 00000246 [ 339.105806] RAX: dffffc0000000000 RBX: ffff888077f521f8 RCX: 0000000000000000 [ 339.105808] RDX: ffff888077f521f8 RSI: ffff888077f52290 RDI: ffff888077f52298 [ 339.105811] RBP: ffff8880aef071b0 R08: 0000000000000000 R09: ffff888092112bf8 [ 339.105814] R10: ffff888092112bd8 R11: ffff888092112240 R12: ffff888077f52290 [ 339.105817] R13: ffff888077f52290 R14: ffff888077f521f8 R15: ffff888077f52280 [ 339.105820] FS: 0000000001a3a880(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 339.105822] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 339.105825] CR2: 00000000006dab10 CR3: 00000000a9679000 CR4: 00000000001406e0 [ 339.105828] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 339.105831] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 339.105832] Call Trace: [ 339.105834] [ 339.105835] hhf_dequeue+0x57f/0xa60 [ 339.105837] __qdisc_run+0x2b8/0xe00 [ 339.105839] __dev_queue_xmit+0x1571/0x25e0 [ 339.105841] ? __lock_is_held+0xb6/0x140 [ 339.105844] ? check_preemption_disabled+0x3c/0x250 [ 339.105846] ? netdev_pick_tx+0x300/0x300 [ 339.105847] ? save_trace+0x290/0x290 [ 339.105849] ? br_nf_post_routing+0x27d/0xf00 [ 339.105851] ? br_forward_finish+0x1cc/0x320 [ 339.105853] ? find_held_lock+0x35/0x130 [ 339.105855] ? br_forward_finish+0x1cc/0x320 [ 339.105857] dev_queue_xmit+0x18/0x20 [ 339.105859] ? dev_queue_xmit+0x18/0x20 [ 339.105861] br_dev_queue_push_xmit+0x367/0x530 [ 339.105863] br_forward_finish+0xbc/0x320 [ 339.105865] ? br_dev_queue_push_xmit+0x530/0x530 [ 339.105867] ? br_fdb_add.cold+0x84/0x84 [ 339.105869] __br_forward+0x560/0x9c0 [ 339.105871] ? br_forward_finish+0x320/0x320 [ 339.105873] ? br_dev_queue_push_xmit+0x530/0x530 [ 339.105875] deliver_clone+0x61/0xc0 [ 339.105877] br_flood+0x3c8/0x530 [ 339.105879] br_dev_xmit+0x9a4/0xd40 [ 339.105881] ? check_preemption_disabled+0x3c/0x250 [ 339.105883] ? br_poll_controller+0x10/0x10 [ 339.105885] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 339.105887] dev_hard_start_xmit+0x18c/0x8b0 [ 339.105889] ? assoc_array_gc+0x1130/0x11d0 [ 339.105891] __dev_queue_xmit+0x1d95/0x25e0 [ 339.105893] ? ipv6_chk_mcast_addr+0x295/0x600 [ 339.105895] ? netdev_pick_tx+0x300/0x300 [ 339.105897] ? find_held_lock+0x35/0x130 [ 339.105899] ? ip6_finish_output+0x4f4/0xb50 [ 339.105901] ? mark_held_locks+0xb1/0x100 [ 339.105903] dev_queue_xmit+0x18/0x20 [ 339.105905] ? dev_queue_xmit+0x18/0x20 [ 339.105907] ip6_finish_output2+0x10bd/0x21b0 [ 339.105909] ? find_held_lock+0x35/0x130 [ 339.105911] ? ip6_forward_finish+0x480/0x480 [ 339.105913] ? lock_downgrade+0x6e0/0x6e0 [ 339.105915] ip6_finish_output+0x4f4/0xb50 [ 339.105917] ? ip6_finish_output+0x4f4/0xb50 [ 339.105918] ip6_output+0x20f/0x6d0 [ 339.105921] ? ip6_finish_output+0xb50/0xb50 [ 339.105923] ? _raw_spin_unlock_bh+0x31/0x40 [ 339.105924] ? ip6_fragment+0x32c0/0x32c0 [ 339.105926] ? icmp6_dst_alloc+0x38e/0x580 [ 339.105928] mld_sendpack+0x8d1/0xd60 [ 339.105930] ? nf_hook.constprop.0+0x2c0/0x2c0 [ 339.105932] ? mld_ifc_timer_expire+0x3a4/0x7b0 [ 339.105934] ? trace_hardirqs_on+0xd/0x10 [ 339.105937] ? __local_bh_enable_ip+0x99/0x1a0 [ 339.105939] mld_ifc_timer_expire+0x3b6/0x7b0 [ 339.105941] call_timer_fn+0x161/0x670 [ 339.105943] ? mld_dad_timer_expire+0x180/0x180 [ 339.105945] ? __next_timer_interrupt+0x140/0x140 [ 339.105947] ? trace_hardirqs_on_caller+0x19b/0x590 [ 339.105949] run_timer_softirq+0x5b4/0x1570 [ 339.105951] ? mld_dad_timer_expire+0x180/0x180 [ 339.105953] ? add_timer+0xae0/0xae0 [ 339.105955] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 339.105957] __do_softirq+0x244/0x9a0 [ 339.105959] ? sched_clock+0x2e/0x50 [ 339.105961] irq_exit+0x160/0x1b0 [ 339.105963] smp_apic_timer_interrupt+0x146/0x5e0 [ 339.105965] apic_timer_interrupt+0x96/0xa0 [ 339.105966] [ 339.105969] RIP: 0010:_raw_spin_unlock_irq+0x54/0x90 [ 339.105971] RSP: 0018:ffff88808d8afec8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 339.105976] RAX: 1ffffffff0ee2a83 RBX: ffff888092112240 RCX: 0000000000000000 [ 339.105978] RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffff888092112abc [ 339.105981] RBP: ffff88808d8afed0 R08: ffff888092112240 R09: 0000000000000000 [ 339.105984] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880aef2c500 [ 339.105987] R13: ffff8880a9d1c340 R14: ffff888077848040 R15: ffff8880aef2ce58 [ 339.105989] ? _raw_spin_unlock_irq+0x28/0x90 [ 339.105991] finish_task_switch+0x178/0x650 [ 339.105993] ? finish_task_switch+0x14d/0x650 [ 339.105995] ? compat_start_thread+0x80/0x80 [ 339.105997] schedule_tail+0xe/0x120 [ 339.105998] ret_from_fork+0x8/0x30 [ 339.106000] RIP: 0033:0x440cca [ 339.106002] RSP: 002b:00007ffe0ddbb510 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 339.106007] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000440cca [ 339.106010] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 [ 339.106013] RBP: 00007ffe0ddbb530 R08: 0000000000000001 R09: 0000000001a3a880 [ 339.106015] R10: 0000000001a3ab50 R11: 0000000000000246 R12: 0000000000000001 [ 339.106018] R13: 00000000004032e0 R14: 0000000000000000 R15: 0000000000000000 [ 339.106019] Code: fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 00 75 53 49 8b 14 24 4c 39 f2 0f 85 99 00 00 00 49 8d 7d 08 48 b8 00 00 00 00 00 fc ff df <48> 89 fa 48 c1 ea 03 80 3c 02 00 75 24 49 8b 55 08 4c 39 f2 0f [ 339.106188] rcu_sched kthread starved for 10568 jiffies! g756 c755 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1 [ 339.652730] rcu_sched I29824 9 2 0x80000000 [ 339.658354] Call Trace: [ 339.660937] __schedule+0x7b8/0x1cd0 [ 339.664642] ? pci_mmcfg_check_reserved+0x150/0x150 [ 339.669646] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 339.674741] schedule+0x92/0x1c0 [ 339.678093] schedule_timeout+0x43e/0xe10 [ 339.682232] ? usleep_range+0x130/0x130 [ 339.686194] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 339.691288] ? prepare_to_swait+0xcc/0x100 [ 339.695512] ? call_timer_fn+0x670/0x670 [ 339.699569] rcu_gp_kthread+0xbf4/0x1ec0 [ 339.703654] ? force_qs_rnp+0x4d0/0x4d0 [ 339.707622] kthread+0x319/0x430 [ 339.710972] ? force_qs_rnp+0x4d0/0x4d0 [ 339.714931] ? kthread_create_on_node+0xd0/0xd0 [ 339.719590] ret_from_fork+0x24/0x30