[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 117.827067] random: sshd: uninitialized urandom read (32 bytes read) [ 118.190732] kauditd_printk_skb: 10 callbacks suppressed [ 118.190740] audit: type=1400 audit(1568354462.434:35): avc: denied { map } for pid=6926 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 [ 118.236706] random: sshd: uninitialized urandom read (32 bytes read) [ 118.755615] random: sshd: uninitialized urandom read (32 bytes read) [ 226.247574] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.185' (ECDSA) to the list of known hosts. [ 231.874606] random: sshd: uninitialized urandom read (32 bytes read) [ 231.990818] audit: type=1400 audit(1568354576.234:36): avc: denied { map } for pid=6938 comm="syz-executor489" path="/root/syz-executor489280638" dev="sda1" ino=16461 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 232.240987] IPVS: ftp: loaded support on port[0] = 21 [ 233.049010] chnl_net:caif_netlink_parms(): no params data found [ 233.078930] bridge0: port 1(bridge_slave_0) entered blocking state [ 233.085904] bridge0: port 1(bridge_slave_0) entered disabled state [ 233.093001] device bridge_slave_0 entered promiscuous mode [ 233.099791] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.106268] bridge0: port 2(bridge_slave_1) entered disabled state [ 233.113122] device bridge_slave_1 entered promiscuous mode [ 233.126999] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 233.135923] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 233.150899] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 233.158312] team0: Port device team_slave_0 added [ 233.163869] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 233.171069] team0: Port device team_slave_1 added [ 233.176605] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 233.183936] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 233.232126] device hsr_slave_0 entered promiscuous mode [ 233.280395] device hsr_slave_1 entered promiscuous mode [ 233.330623] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 233.337768] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 233.350763] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.357347] bridge0: port 2(bridge_slave_1) entered forwarding state [ 233.364278] bridge0: port 1(bridge_slave_0) entered blocking state [ 233.370673] bridge0: port 1(bridge_slave_0) entered forwarding state [ 233.396877] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 233.403210] 8021q: adding VLAN 0 to HW filter on device bond0 [ 233.411652] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 233.419718] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 233.438906] bridge0: port 1(bridge_slave_0) entered disabled state [ 233.446317] bridge0: port 2(bridge_slave_1) entered disabled state [ 233.456181] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 233.463095] 8021q: adding VLAN 0 to HW filter on device team0 [ 233.471559] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 233.479262] bridge0: port 1(bridge_slave_0) entered blocking state [ 233.485655] bridge0: port 1(bridge_slave_0) entered forwarding state [ 233.494513] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 233.502677] bridge0: port 2(bridge_slave_1) entered blocking state [ 233.509004] bridge0: port 2(bridge_slave_1) entered forwarding state [ 233.527258] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 233.537114] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 233.547975] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 233.556877] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 233.564883] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 233.573145] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 233.580974] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 233.588521] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 233.595443] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 233.607121] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 233.617002] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 338.810023] INFO: rcu_preempt self-detected stall on CPU [ 338.815535] 1-...: (10499 ticks this GP) idle=b02/140000000000001/0 softirq=13713/13713 fqs=25 [ 338.824796] (t=10501 jiffies g=1138 c=1137 q=194) [ 338.829823] rcu_preempt kthread starved for 10451 jiffies! g1138 c1137 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 338.830050] INFO: rcu_preempt detected stalls on CPUs/tasks: [ 338.840474] rcu_preempt I [ 338.840629] 1-...: (10499 ticks this GP) idle=b02/140000000000001/0 softirq=13713/13713 fqs=25 [ 338.846389] 29824 8 2 0x80000000 [ 338.846427] Call Trace: [ 338.846542] __schedule+0x7b8/0x1cd0 [ 338.849654] [ 338.858578] ? pci_mmcfg_check_reserved+0x150/0x150 [ 338.862782] (detected by 0, t=10502 jiffies, g=1138, c=1137, q=194) [ 338.865344] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 338.869052] Sending NMI from CPU 0 to CPUs 1: [ 338.870766] schedule+0x92/0x1c0 [ 338.876979] NMI backtrace for cpu 1 [ 338.876982] CPU: 1 PID: 6943 Comm: kworker/1:3 Not tainted 4.14.143 #0 [ 338.876986] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 338.876989] Workqueue: ipv6_addrconf addrconf_dad_work [ 338.876993] task: ffff888097e2c640 task.stack: ffff888091280000 [ 338.876996] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 [ 338.876998] RSP: 0018:ffff8880aef07680 EFLAGS: 00000082 [ 338.877003] RAX: fffffffffffffffd RBX: 0000000000000006 RCX: 0000000000000001 [ 338.877006] RDX: 0000000000010000 RSI: 0000000000000002 RDI: ffffffff8707aaa6 [ 338.877009] RBP: ffff8880aef07788 R08: ffffffff866c00a4 R09: ffffffff88c857b0 [ 338.877012] R10: ffff888097e2d028 R11: ffff888097e2c640 R12: 0000000000000006 [ 338.877015] R13: 0000000000000006 R14: dffffc0000000000 R15: 0000000000000000 [ 338.877019] FS: 0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 338.877021] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 338.877025] CR2: 00000000006dab10 CR3: 000000000766a000 CR4: 00000000001406e0 [ 338.877028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 338.877031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 338.877033] Call Trace: [ 338.877035] [ 338.877037] ? number+0x756/0xa50 [ 338.877039] ? schedule+0x92/0x1c0 [ 338.877041] ? put_dec+0xc0/0xc0 [ 338.877043] ? format_decode+0x1d8/0x930 [ 338.877045] ? set_precision+0x150/0x150 [ 338.877047] ? __lock_acquire+0x5f7/0x4620 [ 338.877049] vsnprintf+0x1eb/0x1560 [ 338.877051] ? pointer+0xb10/0xb10 [ 338.877054] ? trace_hardirqs_on+0x10/0x10 [ 338.877055] snprintf+0xa5/0xd0 [ 338.877057] ? vsprintf+0x40/0x40 [ 338.877060] ? trace_hardirqs_on+0x10/0x10 [ 338.877062] print_prefix+0x23c/0x3a0 [ 338.877064] msg_print_text+0x83/0x1b0 [ 338.877066] console_unlock+0x302/0xed0 [ 338.877068] vprintk_emit+0x1f9/0x600 [ 338.877070] vprintk_default+0x28/0x30 [ 338.877072] vprintk_func+0x5d/0x159 [ 338.877074] printk+0x9e/0xbc [ 338.877077] ? show_regs_print_info+0x63/0x63 [ 338.877079] ? is_bpf_text_address+0xa6/0x120 [ 338.877081] ? schedule+0x92/0x1c0 [ 338.877083] show_trace_log_lvl+0x22d/0x26b [ 338.877086] ? schedule+0x92/0x1c0 [ 338.877087] ? schedule+0x92/0x1c0 [ 338.877089] show_stack+0x39/0x3b [ 338.877092] sched_show_task.cold+0x2f0/0x351 [ 338.877095] rcu_check_gp_kthread_starvation+0x28e/0x2c7 [ 338.877098] rcu_check_callbacks.cold+0x435/0xd0a [ 338.877100] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 338.877103] update_process_times+0x31/0x70 [ 338.877105] tick_sched_handle+0x85/0x160 [ 338.877107] tick_sched_timer+0x43/0x130 [ 338.877110] __hrtimer_run_queues+0x270/0xbc0 [ 338.877112] ? tick_sched_do_timer+0xe0/0xe0 [ 338.877114] ? hrtimer_start_range_ns+0x10d0/0x10d0 [ 338.877117] hrtimer_interrupt+0x1d8/0x5d0 [ 338.877119] smp_apic_timer_interrupt+0x11c/0x5e0 [ 338.877121] apic_timer_interrupt+0x96/0xa0 [ 338.877123] [ 338.877125] RIP: 0010:__list_add_valid+0x48/0xa0 [ 338.877128] RSP: 0018:ffff888091287528 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 338.877133] RAX: dffffc0000000000 RBX: ffff888090125438 RCX: 0000000000000000 [ 338.877137] RDX: ffff8880901254d0 RSI: ffff8880901254d0 RDI: ffff8880901254d8 [ 338.877140] RBP: ffff888091287540 R08: 0000000000000000 R09: ffff888097e2cff8 [ 338.877143] R10: ffff888097e2cfd8 R11: ffff888097e2c640 R12: ffff8880901254d0 [ 338.877146] R13: ffff888090125438 R14: ffff8880901254d0 R15: ffff8880901254c0 [ 338.877148] hhf_dequeue+0x61b/0xa60 [ 338.877150] __qdisc_run+0x2b8/0xe00 [ 338.877152] __dev_queue_xmit+0x1571/0x25e0 [ 338.877155] ? trace_hardirqs_on+0x10/0x10 [ 338.877157] ? netdev_pick_tx+0x300/0x300 [ 338.877159] ? ip6_finish_output2+0x9ab/0x21b0 [ 338.877161] ? memcpy+0x46/0x50 [ 338.877163] dev_queue_xmit+0x18/0x20 [ 338.877165] ? dev_queue_xmit+0x18/0x20 [ 338.877167] neigh_resolve_output+0x4d8/0x870 [ 338.877170] ip6_finish_output2+0x9ab/0x21b0 [ 338.877172] ? ip6_forward_finish+0x480/0x480 [ 338.877175] ? lock_downgrade+0x6e0/0x6e0 [ 338.877177] ip6_finish_output+0x4f4/0xb50 [ 338.877179] ? ip6_finish_output+0x4f4/0xb50 [ 338.877181] ip6_output+0x20f/0x6d0 [ 338.877184] ? ip6_finish_output+0xb50/0xb50 [ 338.877186] ? __lock_is_held+0xb6/0x140 [ 338.877188] ? ip6_fragment+0x32c0/0x32c0 [ 338.877190] ndisc_send_skb+0xb56/0x11e0 [ 338.877192] ? ndisc_error_report+0x190/0x190 [ 338.877195] ndisc_send_ns+0x360/0x7e0 [ 338.877197] ? ndisc_netdev_event+0x3b0/0x3b0 [ 338.877199] ? trace_hardirqs_on_caller+0x400/0x590 [ 338.877202] ? addrconf_dad_work+0x97c/0xff0 [ 338.877204] ? trace_hardirqs_on+0xd/0x10 [ 338.877206] ? __local_bh_enable_ip+0x99/0x1a0 [ 338.877209] addrconf_dad_work+0xa40/0xff0 [ 338.877211] ? addrconf_dad_completed+0xa70/0xa70 [ 338.877214] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 338.877216] process_one_work+0x863/0x1600 [ 338.877218] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 338.877220] worker_thread+0x5d9/0x1050 [ 338.877222] kthread+0x319/0x430 [ 338.877225] ? process_one_work+0x1600/0x1600 [ 338.877227] ? kthread_create_on_node+0xd0/0xd0 [ 338.877229] ret_from_fork+0x24/0x30 [ 338.877231] Code: 00 00 48 c7 c7 80 99 6e 86 4c 89 35 eb 4f be 07 41 be f4 ff ff ff e8 13 3c ee ff 48 c7 05 d5 4f be 07 00 00 00 00 e9 2f ec ff ff <65> 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a 65 8b 15 4b 0b a5 7e [ 338.877326] rcu_preempt kthread starved for 10452 jiffies! g1138 c1137 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 338.883008] schedule_timeout+0x43e/0xe10 [ 338.888090] rcu_preempt I [ 338.892685] ? usleep_range+0x130/0x130 [ 338.896066] 29824 8 2 0x80000000 [ 338.899669] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 338.906305] Call Trace: [ 338.915643] ? prepare_to_swait+0xcc/0x100 [ 338.920900] __schedule+0x7b8/0x1cd0 [ 338.926930] ? call_timer_fn+0x670/0x670 [ 338.932289] ? pci_mmcfg_check_reserved+0x150/0x150 [ 338.937648] rcu_gp_kthread+0xbf4/0x1ec0 [ 338.944899] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 338.952351] ? force_qs_rnp+0x4d0/0x4d0 [ 338.959607] schedule+0x92/0x1c0 [ 338.966857] kthread+0x319/0x430 [ 338.974153] schedule_timeout+0x43e/0xe10 [ 338.982554] ? force_qs_rnp+0x4d0/0x4d0 [ 338.988431] ? usleep_range+0x130/0x130 [ 338.995679] ? kthread_create_on_node+0xd0/0xd0 [ 338.995689] ret_from_fork+0x24/0x30 [ 339.002937] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 339.010242] NMI backtrace for cpu 1 [ 339.012766] ? prepare_to_swait+0xcc/0x100 [ 339.014913] CPU: 1 PID: 6943 Comm: kworker/1:3 Not tainted 4.14.143 #0 [ 339.018434] ? call_timer_fn+0x670/0x670 [ 339.021961] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 339.021984] Workqueue: ipv6_addrconf addrconf_dad_work [ 339.025371] rcu_gp_kthread+0xbf4/0x1ec0 [ 339.033515] ? force_qs_rnp+0x4d0/0x4d0 [ 339.037710] Call Trace: [ 339.041321] kthread+0x319/0x430 [ 339.044935] [ 339.049173] ? force_qs_rnp+0x4d0/0x4d0 [ 339.052524] dump_stack+0x138/0x197 [ 339.055896] ? kthread_create_on_node+0xd0/0xd0 [ 339.060208] nmi_cpu_backtrace.cold+0x57/0x94 [ 339.063986] ret_from_fork+0x24/0x30 [ 339.067852] ? irq_force_complete_move.cold+0x7d/0x7d [ 339.573252] nmi_trigger_cpumask_backtrace+0x141/0x189 [ 339.578515] arch_trigger_cpumask_backtrace+0x14/0x20 [ 339.583777] rcu_dump_cpu_stacks+0x186/0x1d2 [ 339.588184] rcu_check_callbacks.cold+0x43d/0xd0a [ 339.593096] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 339.598535] update_process_times+0x31/0x70 [ 339.602845] tick_sched_handle+0x85/0x160 [ 339.606971] tick_sched_timer+0x43/0x130 [ 339.611018] __hrtimer_run_queues+0x270/0xbc0 [ 339.615497] ? tick_sched_do_timer+0xe0/0xe0 [ 339.619885] ? hrtimer_start_range_ns+0x10d0/0x10d0 [ 339.624886] hrtimer_interrupt+0x1d8/0x5d0 [ 339.629112] smp_apic_timer_interrupt+0x11c/0x5e0 [ 339.633935] apic_timer_interrupt+0x96/0xa0 [ 339.638240] [ 339.640574] RIP: 0010:__list_add_valid+0x48/0xa0 [ 339.645306] RSP: 0018:ffff888091287528 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 [ 339.653010] RAX: dffffc0000000000 RBX: ffff888090125438 RCX: 0000000000000000 [ 339.660270] RDX: ffff8880901254d0 RSI: ffff8880901254d0 RDI: ffff8880901254d8 [ 339.668128] RBP: ffff888091287540 R08: 0000000000000000 R09: ffff888097e2cff8 [ 339.675381] R10: ffff888097e2cfd8 R11: ffff888097e2c640 R12: ffff8880901254d0 [ 339.682631] R13: ffff888090125438 R14: ffff8880901254d0 R15: ffff8880901254c0 [ 339.689897] hhf_dequeue+0x61b/0xa60 [ 339.693597] __qdisc_run+0x2b8/0xe00 [ 339.697296] __dev_queue_xmit+0x1571/0x25e0 [ 339.701598] ? trace_hardirqs_on+0x10/0x10 [ 339.705817] ? netdev_pick_tx+0x300/0x300 [ 339.710036] ? ip6_finish_output2+0x9ab/0x21b0 [ 339.714605] ? memcpy+0x46/0x50 [ 339.717879] dev_queue_xmit+0x18/0x20 [ 339.721659] ? dev_queue_xmit+0x18/0x20 [ 339.725616] neigh_resolve_output+0x4d8/0x870 [ 339.730101] ip6_finish_output2+0x9ab/0x21b0 [ 339.734581] ? ip6_forward_finish+0x480/0x480 [ 339.739405] ? lock_downgrade+0x6e0/0x6e0 [ 339.743625] ip6_finish_output+0x4f4/0xb50 [ 339.747972] ? ip6_finish_output+0x4f4/0xb50 [ 339.752365] ip6_output+0x20f/0x6d0 [ 339.755987] ? ip6_finish_output+0xb50/0xb50 [ 339.760388] ? __lock_is_held+0xb6/0x140 [ 339.764431] ? ip6_fragment+0x32c0/0x32c0 [ 339.768561] ndisc_send_skb+0xb56/0x11e0 [ 339.772621] ? ndisc_error_report+0x190/0x190 [ 339.777281] ndisc_send_ns+0x360/0x7e0 [ 339.781269] ? ndisc_netdev_event+0x3b0/0x3b0 [ 339.785744] ? trace_hardirqs_on_caller+0x400/0x590 [ 339.790741] ? addrconf_dad_work+0x97c/0xff0 [ 339.795500] ? trace_hardirqs_on+0xd/0x10 [ 339.799628] ? __local_bh_enable_ip+0x99/0x1a0 [ 339.804211] addrconf_dad_work+0xa40/0xff0 [ 339.808433] ? addrconf_dad_completed+0xa70/0xa70 [ 339.813257] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 339.818690] process_one_work+0x863/0x1600 [ 339.822911] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 339.827563] worker_thread+0x5d9/0x1050 [ 339.831531] kthread+0x319/0x430 [ 339.834876] ? process_one_work+0x1600/0x1600 [ 339.839747] ? kthread_create_on_node+0xd0/0xd0 [ 339.844411] ret_from_fork+0x24/0x30 [ 339.848145] INFO: rcu_sched detected stalls on CPUs/tasks: [ 339.853785] 1-...: (10501 ticks this GP) idle=b02/140000000000000/0 softirq=13713/13713 fqs=25 [ 339.862690] (detected by 0, t=10502 jiffies, g=788, c=787, q=7) [ 339.868828] Sending NMI from CPU 0 to CPUs 1: [ 339.873796] NMI backtrace for cpu 1 [ 339.873799] CPU: 1 PID: 6943 Comm: kworker/1:3 Not tainted 4.14.143 #0 [ 339.873802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 339.873804] Workqueue: ipv6_addrconf addrconf_dad_work [ 339.873808] task: ffff888097e2c640 task.stack: ffff888091280000 [ 339.873811] RIP: 0010:__sanitizer_cov_trace_pc+0x1d/0x60 [ 339.873813] RSP: 0018:ffff888091287548 EFLAGS: 00000246 [ 339.873817] RAX: ffff888097e2c640 RBX: ffff888090125438 RCX: 0000000000000000 [ 339.873820] RDX: 0000000000000000 RSI: ffff8880901254d0 RDI: ffff8880901254d8 [ 339.873823] RBP: ffff8880912875a0 R08: 0000000000000000 R09: ffff888097e2cff8 [ 339.873825] R10: ffff888097e2cfd8 R11: ffff888097e2c640 R12: dffffc0000000000 [ 339.873828] R13: ffff888090125240 R14: ffff8880901254d0 R15: ffff8880901254c0 [ 339.873831] FS: 0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 [ 339.873834] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 339.873836] CR2: 00000000006dab10 CR3: 000000000766a000 CR4: 00000000001406e0 [ 339.873839] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 339.873842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 339.873844] Call Trace: [ 339.873846] ? hhf_dequeue+0x5eb/0xa60 [ 339.873847] __qdisc_run+0x2b8/0xe00 [ 339.873850] __dev_queue_xmit+0x1571/0x25e0 [ 339.873852] ? trace_hardirqs_on+0x10/0x10 [ 339.873853] ? netdev_pick_tx+0x300/0x300 [ 339.873855] ? ip6_finish_output2+0x9ab/0x21b0 [ 339.873857] ? memcpy+0x46/0x50 [ 339.873859] dev_queue_xmit+0x18/0x20 [ 339.873861] ? dev_queue_xmit+0x18/0x20 [ 339.873863] neigh_resolve_output+0x4d8/0x870 [ 339.873865] ip6_finish_output2+0x9ab/0x21b0 [ 339.873867] ? ip6_forward_finish+0x480/0x480 [ 339.873869] ? lock_downgrade+0x6e0/0x6e0 [ 339.873877] ip6_finish_output+0x4f4/0xb50 [ 339.873879] ? ip6_finish_output+0x4f4/0xb50 [ 339.873881] ip6_output+0x20f/0x6d0 [ 339.873883] ? ip6_finish_output+0xb50/0xb50 [ 339.873884] ? __lock_is_held+0xb6/0x140 [ 339.873887] ? ip6_fragment+0x32c0/0x32c0 [ 339.873888] ndisc_send_skb+0xb56/0x11e0 [ 339.873891] ? ndisc_error_report+0x190/0x190 [ 339.873893] ndisc_send_ns+0x360/0x7e0 [ 339.873895] ? ndisc_netdev_event+0x3b0/0x3b0 [ 339.873897] ? trace_hardirqs_on_caller+0x400/0x590 [ 339.873899] ? addrconf_dad_work+0x97c/0xff0 [ 339.873901] ? trace_hardirqs_on+0xd/0x10 [ 339.873903] ? __local_bh_enable_ip+0x99/0x1a0 [ 339.873905] addrconf_dad_work+0xa40/0xff0 [ 339.873907] ? addrconf_dad_completed+0xa70/0xa70 [ 339.873910] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 339.873912] process_one_work+0x863/0x1600 [ 339.873914] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 339.873916] worker_thread+0x5d9/0x1050 [ 339.873918] kthread+0x319/0x430 [ 339.873920] ? process_one_work+0x1600/0x1600 [ 339.873922] ? kthread_create_on_node+0xd0/0xd0 [ 339.873924] ret_from_fork+0x24/0x30 [ 339.873926] Code: 05 d5 4f be 07 00 00 00 00 e9 2f ec ff ff 65 48 8b 04 25 40 ee 01 00 48 85 c0 74 1a 65 8b 15 4b 0b a5 7e 81 e2 00 01 1f 00 75 0b <8b> 90 c8 12 00 00 83 fa 01 74 01 c3 55 48 89 e5 48 8b 75 08 48 [ 339.874324] rcu_sched kthread starved for 10452 jiffies! g788 c787 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 340.177640] rcu_sched I29824 9 2 0x80000000 [ 340.183269] Call Trace: [ 340.185860] __schedule+0x7b8/0x1cd0 [ 340.189572] ? pci_mmcfg_check_reserved+0x150/0x150 [ 340.194580] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 340.199760] schedule+0x92/0x1c0 [ 340.203112] schedule_timeout+0x43e/0xe10 [ 340.207265] ? usleep_range+0x130/0x130 [ 340.211228] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 340.216321] ? prepare_to_swait+0xcc/0x100 [ 340.220893] ? call_timer_fn+0x670/0x670 [ 340.225472] rcu_gp_kthread+0xbf4/0x1ec0 [ 340.229540] ? force_qs_rnp+0x4d0/0x4d0 [ 340.233510] kthread+0x319/0x430 [ 340.236863] ? force_qs_rnp+0x4d0/0x4d0 [ 340.240824] ? kthread_create_on_node+0xd0/0xd0 [ 340.245572] ret_from_fork+0x24/0x30