INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.12' (ECDSA) to the list of known hosts. 2018/04/17 11:20:37 parsed 1 programs 2018/04/17 11:20:37 executed programs: 0 2018/04/17 11:20:42 executed programs: 344 2018/04/17 11:20:47 executed programs: 709 2018/04/17 11:20:52 executed programs: 1077 2018/04/17 11:20:57 executed programs: 1444 2018/04/17 11:21:02 executed programs: 1811 2018/04/17 11:21:07 executed programs: 2184 2018/04/17 11:21:12 executed programs: 2556 2018/04/17 11:21:17 executed programs: 2924 2018/04/17 11:21:22 executed programs: 3291 2018/04/17 11:21:27 executed programs: 3665 2018/04/17 11:21:32 executed programs: 4024 2018/04/17 11:21:38 executed programs: 4383 2018/04/17 11:21:43 executed programs: 4742 2018/04/17 11:21:48 executed programs: 5101 2018/04/17 11:21:53 executed programs: 5471 2018/04/17 11:21:58 executed programs: 5836 2018/04/17 11:22:03 executed programs: 6201 2018/04/17 11:22:08 executed programs: 6564 2018/04/17 11:22:13 executed programs: 6937 2018/04/17 11:22:18 executed programs: 7299 2018/04/17 11:22:23 executed programs: 7671 2018/04/17 11:22:28 executed programs: 8044 2018/04/17 11:22:33 executed programs: 8412 2018/04/17 11:22:38 executed programs: 8774 2018/04/17 11:22:43 executed programs: 9140 2018/04/17 11:22:48 executed programs: 9507 2018/04/17 11:22:53 executed programs: 9881 2018/04/17 11:22:58 executed programs: 10254 2018/04/17 11:23:03 executed programs: 10630 2018/04/17 11:23:08 executed programs: 11003 2018/04/17 11:23:13 executed programs: 11368 2018/04/17 11:23:18 executed programs: 11738 2018/04/17 11:23:23 executed programs: 12105 2018/04/17 11:23:28 executed programs: 12477 2018/04/17 11:23:33 executed programs: 12843 2018/04/17 11:23:38 executed programs: 13211 2018/04/17 11:23:43 executed programs: 13578 2018/04/17 11:23:48 executed programs: 13950 2018/04/17 11:23:53 executed programs: 14320 2018/04/17 11:23:58 executed programs: 14693 2018/04/17 11:24:03 executed programs: 15065 2018/04/17 11:24:08 executed programs: 15439 2018/04/17 11:24:13 executed programs: 15812 syzkaller login: [ 786.472527] random: crng init done 2018/04/17 11:24:18 executed programs: 16185 2018/04/17 11:24:23 executed programs: 16553 2018/04/17 11:24:28 executed programs: 16924 2018/04/17 11:24:33 executed programs: 17297 2018/04/17 11:24:38 executed programs: 17660 2018/04/17 11:24:43 executed programs: 18021 2018/04/17 11:24:48 executed programs: 18397 2018/04/17 11:24:53 executed programs: 18768 2018/04/17 11:24:58 executed programs: 19147 2018/04/17 11:25:03 executed programs: 19524 2018/04/17 11:25:08 executed programs: 19903 2018/04/17 11:25:13 executed programs: 20277 2018/04/17 11:25:18 executed programs: 20647 2018/04/17 11:25:23 executed programs: 21014 2018/04/17 11:25:28 executed programs: 21378 2018/04/17 11:25:33 executed programs: 21748 2018/04/17 11:25:38 executed programs: 22112 2018/04/17 11:25:43 executed programs: 22475 2018/04/17 11:25:48 executed programs: 22837 2018/04/17 11:25:53 executed programs: 23201 [ 889.823966] kworker/dying (52) used greatest stack depth: 54496 bytes left 2018/04/17 11:25:58 executed programs: 23568 2018/04/17 11:26:03 executed programs: 23930 2018/04/17 11:26:08 executed programs: 24290 2018/04/17 11:26:13 executed programs: 24654 2018/04/17 11:26:18 executed programs: 25013 2018/04/17 11:26:23 executed programs: 25363 2018/04/17 11:26:28 executed programs: 25725 [ 926.783197] ================================================================== [ 926.790613] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1344/0x1aa0 [ 926.797785] CPU: 0 PID: 8 Comm: rcu_sched Not tainted 4.16.0+ #84 [ 926.803999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 926.813342] Call Trace: [ 926.815930] dump_stack+0x185/0x1d0 [ 926.819544] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 926.824541] kmsan_report+0x142/0x240 [ 926.828326] __msan_warning_32+0x6c/0xb0 [ 926.832371] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 926.837201] update_load_avg+0xde6/0x2c20 [ 926.841340] dequeue_task_fair+0x12f/0x2ea0 [ 926.845651] ? __msan_poison_alloca+0x15c/0x1d0 [ 926.850301] ? __schedule+0x132/0x730 [ 926.854083] ? enqueue_task_fair+0x43a0/0x43a0 [ 926.858645] deactivate_task+0x50d/0x780 [ 926.862703] __schedule+0x164/0x730 [ 926.866311] ? schedule+0x1cc/0x2f0 [ 926.869920] schedule+0x1cc/0x2f0 [ 926.873362] schedule_timeout+0x3e7/0x570 [ 926.877496] ? run_local_timers+0x100/0x100 [ 926.881805] rcu_gp_kthread+0x21e1/0x38d0 [ 926.885942] ? rcu_barrier_func+0x120/0x120 [ 926.890257] kthread+0x539/0x720 [ 926.893605] ? rcu_barrier_func+0x120/0x120 [ 926.897909] ? kthread_blkcg+0xf0/0xf0 [ 926.901779] ret_from_fork+0x35/0x40 [ 926.905507] [ 926.907114] Uninit was stored to memory at: [ 926.911420] kmsan_internal_chain_origin+0x12b/0x210 [ 926.916537] __msan_chain_origin+0x69/0xc0 [ 926.920753] dequeue_task_fair+0x16f0/0x2ea0 [ 926.925141] deactivate_task+0x50d/0x780 [ 926.929183] __schedule+0x164/0x730 [ 926.932790] do_task_dead+0xa4/0xd0 [ 926.936414] do_exit+0x340e/0x38d0 [ 926.939935] do_group_exit+0x1a0/0x360 [ 926.943803] SYSC_exit_group+0x21/0x30 [ 926.947676] SyS_exit_group+0x25/0x30 [ 926.951459] do_syscall_64+0x309/0x430 [ 926.955332] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 926.960498] Uninit was stored to memory at: [ 926.964802] kmsan_internal_chain_origin+0x12b/0x210 [ 926.969886] __msan_chain_origin+0x69/0xc0 [ 926.974116] reweight_entity+0x126b/0x1a30 [ 926.978695] task_tick_fair+0x5f1/0x1040 [ 926.983114] scheduler_tick+0x28b/0x490 [ 926.987069] update_process_times+0x157/0x1a0 [ 926.991546] tick_sched_timer+0x33b/0x4b0 [ 926.995675] __hrtimer_run_queues+0xc03/0x15d0 [ 927.000238] hrtimer_interrupt+0x426/0xaf0 [ 927.004456] local_apic_timer_interrupt+0x66/0x230 [ 927.009373] smp_apic_timer_interrupt+0x5a/0x90 [ 927.014018] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave [ 927.021525] Variable was created at: [ 927.025220] _raw_spin_lock_irqsave+0x45/0xf0 [ 927.029693] hrtimer_interrupt+0x101/0xaf0 [ 927.033904] ================================================================== [ 927.041242] Disabling lock debugging due to kernel taint [ 927.046672] Kernel panic - not syncing: panic_on_warn set ... [ 927.046672] [ 927.054019] CPU: 0 PID: 8 Comm: rcu_sched Tainted: G B 4.16.0+ #84 [ 927.061532] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 927.070864] Call Trace: [ 927.073439] dump_stack+0x185/0x1d0 [ 927.077056] panic+0x39d/0x940 [ 927.080270] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 927.085276] kmsan_report+0x238/0x240 [ 927.089062] __msan_warning_32+0x6c/0xb0 [ 927.093108] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 927.097939] update_load_avg+0xde6/0x2c20 [ 927.102078] dequeue_task_fair+0x12f/0x2ea0 [ 927.106388] ? __msan_poison_alloca+0x15c/0x1d0 [ 927.111039] ? __schedule+0x132/0x730 [ 927.114823] ? enqueue_task_fair+0x43a0/0x43a0 [ 927.119387] deactivate_task+0x50d/0x780 [ 927.123432] __schedule+0x164/0x730 [ 927.127041] ? schedule+0x1cc/0x2f0 [ 927.130654] schedule+0x1cc/0x2f0 [ 927.134094] schedule_timeout+0x3e7/0x570 [ 927.138237] ? run_local_timers+0x100/0x100 [ 927.142544] rcu_gp_kthread+0x21e1/0x38d0 [ 927.146683] ? rcu_barrier_func+0x120/0x120 [ 927.150992] kthread+0x539/0x720 [ 927.154349] ? rcu_barrier_func+0x120/0x120 [ 927.158658] ? kthread_blkcg+0xf0/0xf0 [ 927.162529] ret_from_fork+0x35/0x40 [ 927.166678] Dumping ftrace buffer: [ 927.170196] (ftrace buffer empty) [ 927.173881] Kernel Offset: disabled [ 927.177483] Rebooting in 86400 seconds..