[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts. syzkaller login: [ 780.291163][ T8485] IPVS: ftp: loaded support on port[0] = 21 [ 780.291168][ T8480] IPVS: ftp: loaded support on port[0] = 21 [ 780.300403][ T8484] IPVS: ftp: loaded support on port[0] = 21 [ 780.313148][ T8487] IPVS: ftp: loaded support on port[0] = 21 [ 780.326461][ T8486] IPVS: ftp: loaded support on port[0] = 21 [ 780.342350][ T8482] IPVS: ftp: loaded support on port[0] = 21 [ 780.470991][ T8510] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.511797][ T8510] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 780.551460][ T8528] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 780.594020][ T355] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.610062][ T355] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 780.619965][ T3128] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 780.641893][ T355] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.649777][ T355] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 780.689570][ T8528] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 780.711302][ C1] hrtimer: interrupt took 44640 ns [ 780.726026][ T8510] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.739694][ T355] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.765196][ T8510] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 780.772907][ T355] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 780.815941][ T3128] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 780.832746][ T3128] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 780.851244][ T58] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 executing program [ 780.868775][ T8510] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 780.907498][ T58] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 780.916529][ T8510] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.002696][ T8510] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 781.014717][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 781.030215][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 781.038552][ T8510] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.048701][ T58] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 781.062226][ T8593] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 781.070155][ T8593] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.087780][ T355] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 781.110308][ T8578] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 781.125943][ T58] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.141005][ T355] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.177969][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 781.192085][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 781.208946][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program [ 781.252625][ T8593] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 781.260706][ T8593] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 781.273032][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1277.892464][ C0] rcu: INFO: rcu_preempt self-detected stall on CPU [ 1277.899297][ C0] rcu: 0-...!: (10493 ticks this GP) idle=4ae/1/0x4000000000000000 softirq=20089/20090 fqs=0 [ 1277.909895][ C0] (t=10500 jiffies g=24993 q=7) [ 1277.914926][ C0] rcu: rcu_preempt kthread starved for 10500 jiffies! g24993 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 1277.926093][ C0] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 1277.936044][ C0] rcu: RCU grace-period kthread stack dump: [ 1277.941916][ C0] task:rcu_preempt state:R running task stack:29512 pid: 11 ppid: 2 flags:0x00004000 [ 1277.952673][ C0] Call Trace: [ 1277.955985][ C0] __schedule+0x893/0x2130 [ 1277.960397][ C0] ? io_schedule_timeout+0x140/0x140 [ 1277.965672][ C0] ? debug_object_destroy+0x210/0x210 [ 1277.971037][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 1277.975878][ C0] schedule+0xcf/0x270 [ 1277.979939][ C0] schedule_timeout+0x148/0x250 [ 1277.984779][ C0] ? usleep_range+0x170/0x170 [ 1277.989443][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 1277.994630][ C0] ? __next_timer_interrupt+0x210/0x210 [ 1278.000171][ C0] ? prepare_to_swait_exclusive+0x2d0/0x2d0 [ 1278.006057][ C0] rcu_gp_kthread+0xb4c/0x1c90 [ 1278.010986][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 1278.016878][ C0] ? rcu_core_si+0x10/0x10 [ 1278.021284][ C0] ? _raw_spin_unlock_irqrestore+0x42/0x50 [ 1278.027080][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 1278.032268][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 1278.037277][ C0] ? rcu_core_si+0x10/0x10 [ 1278.041686][ C0] kthread+0x3b1/0x4a0 [ 1278.045759][ C0] ? kthread_create_worker_on_cpu+0xf0/0xf0 [ 1278.051785][ C0] ret_from_fork+0x1f/0x30 [ 1278.056205][ C0] NMI backtrace for cpu 0 [ 1278.060531][ C0] CPU: 0 PID: 14966 Comm: syz-executor610 Not tainted 5.10.0-rc7-syzkaller #0 [ 1278.069357][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1278.079393][ C0] Call Trace: [ 1278.082660][ C0] [ 1278.085502][ C0] dump_stack+0x107/0x163 [ 1278.089820][ C0] nmi_cpu_backtrace.cold+0x44/0xd7 [ 1278.095008][ C0] ? lapic_can_unplug_cpu+0x80/0x80 [ 1278.100194][ C0] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 1278.106166][ C0] rcu_dump_cpu_stacks+0x1e3/0x21e [ 1278.111271][ C0] rcu_sched_clock_irq.cold+0x472/0xee8 [ 1278.116806][ C0] ? rcutree_dead_cpu+0x40/0x40 [ 1278.121646][ C0] ? lock_downgrade+0x6d0/0x6d0 [ 1278.126494][ C0] ? __raise_softirq_irqoff+0x93/0x1d0 [ 1278.131944][ C0] update_process_times+0x77/0xd0 [ 1278.136953][ C0] tick_sched_handle+0x9b/0x180 [ 1278.141792][ C0] tick_sched_timer+0x1d1/0x2a0 [ 1278.146630][ C0] ? can_stop_idle_tick+0x290/0x290 [ 1278.151812][ C0] __hrtimer_run_queues+0x1ce/0xea0 [ 1278.157096][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 1278.163065][ C0] ? ktime_get_update_offsets_now+0x249/0x320 [ 1278.169124][ C0] hrtimer_interrupt+0x334/0x940 [ 1278.174062][ C0] __sysvec_apic_timer_interrupt+0x146/0x540 [ 1278.180031][ C0] asm_call_irq_on_stack+0xf/0x20 [ 1278.185036][ C0] [ 1278.187965][ C0] sysvec_apic_timer_interrupt+0xbd/0x100 [ 1278.193762][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 1278.199745][ C0] RIP: 0010:kvm_wait+0x9c/0xd0 [ 1278.204494][ C0] Code: 02 48 89 da 83 e2 07 38 d0 7f 04 84 c0 75 32 0f b6 03 41 38 c4 75 13 e8 32 52 46 00 e9 07 00 00 00 0f 00 2d 96 06 19 08 fb f4 1f 52 46 00 eb af c3 e9 07 00 00 00 0f 00 2d 80 06 19 08 f4 eb [ 1278.224615][ C0] RSP: 0018:ffffc9000ab97c90 EFLAGS: 00000202 [ 1278.230677][ C0] RAX: 000000000000acef RBX: ffff88814221fb08 RCX: ffffffff8155a917 [ 1278.238663][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 1278.246632][ C0] RBP: 0000000000000246 R08: 0000000000000001 R09: ffffffff8ebaf69f [ 1278.254603][ C0] R10: fffffbfff1d75ed3 R11: 0000000000000000 R12: 0000000000000003 [ 1278.262565][ C0] R13: ffffed1028443f61 R14: 0000000000000001 R15: ffff8880b9e356c0 [ 1278.270542][ C0] ? mark_lock+0xf7/0x1730 [ 1278.274951][ C0] __pv_queued_spin_lock_slowpath+0x8b8/0xb40 [ 1278.281008][ C0] ? pv_hash+0xe0/0xe0 [ 1278.285067][ C0] ? lock_release+0x710/0x710 [ 1278.289731][ C0] do_raw_spin_lock+0x200/0x2b0 [ 1278.294567][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 1278.299496][ C0] ? dput+0x35/0xbc0 [ 1278.303398][ C0] dput+0x941/0xbc0 [ 1278.307200][ C0] __fput+0x3ab/0x920 [ 1278.311183][ C0] task_work_run+0xdd/0x190 [ 1278.315679][ C0] exit_to_user_mode_prepare+0x17e/0x1a0 [ 1278.321305][ C0] syscall_exit_to_user_mode+0x38/0x260 [ 1278.326837][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 1278.332717][ C0] RIP: 0033:0x406b01 [ 1278.336602][ C0] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 24 1a 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 1278.356307][ C0] RSP: 002b:00007ffde6771d20 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 1278.364726][ C0] RAX: 0000000000000000 RBX: 00007ffde6771d60 RCX: 0000000000406b01 [ 1278.372696][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 1278.380653][ C0] RBP: 0000000000000004 R08: 0000006400000340 R09: 0000006400000340 [ 1278.388608][ C0] R10: 00007ffde6771d60 R11: 0000000000000293 R12: 000000000000002d [ 1278.396566][ C0] R13: 0000000000000006 R14: 00000000006e2a1c R15: 0000000000000001