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 '10.128.0.15' (ECDSA) to the list of known hosts. 2018/04/18 08:37:47 parsed 1 programs 2018/04/18 08:37:47 executed programs: 0 2018/04/18 08:37:52 executed programs: 371 2018/04/18 08:37:57 executed programs: 715 2018/04/18 08:38:02 executed programs: 1058 2018/04/18 08:38:07 executed programs: 1393 2018/04/18 08:38:12 executed programs: 1731 2018/04/18 08:38:17 executed programs: 2079 2018/04/18 08:38:22 executed programs: 2425 2018/04/18 08:38:27 executed programs: 2766 syzkaller login: [ 93.262321] ================================================================== [ 93.269736] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1344/0x1aa0 [ 93.276908] CPU: 0 PID: 3592 Comm: syz-executor0 Not tainted 4.16.0+ #84 [ 93.283721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.293052] Call Trace: [ 93.295623] dump_stack+0x185/0x1d0 [ 93.299241] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 93.304235] kmsan_report+0x142/0x240 [ 93.308019] __msan_warning_32+0x6c/0xb0 [ 93.312061] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 93.316890] update_load_avg+0xde6/0x2c20 [ 93.321019] ? dequeue_task_fair+0xf9/0x2ea0 [ 93.325413] dequeue_task_fair+0x12f/0x2ea0 [ 93.329721] ? enqueue_task_fair+0x43a0/0x43a0 [ 93.334284] deactivate_task+0x50d/0x780 [ 93.338329] __schedule+0x164/0x730 [ 93.341935] ? schedule+0x1cc/0x2f0 [ 93.345540] schedule+0x1cc/0x2f0 [ 93.348991] do_nanosleep+0x2c3/0x9b0 [ 93.352775] SYSC_nanosleep+0x420/0x6a0 [ 93.356732] ? hrtimer_init_sleeper+0xc0/0xc0 [ 93.361214] SyS_nanosleep+0x46/0x70 [ 93.364908] do_syscall_64+0x309/0x430 [ 93.368777] ? hrtimer_nanosleep+0x560/0x560 [ 93.373167] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 93.378336] RIP: 0033:0x480a30 [ 93.381501] RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 93.389189] RAX: ffffffffffffffda RBX: 0000000000000181 RCX: 0000000000480a30 [ 93.396439] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3eaa0 [ 93.403686] RBP: 0000000000016c43 R08: 0000000000000001 R09: 0000000000dc5940 [ 93.410934] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 93.418184] R13: 0000000000000003 R14: 0000000000000477 R15: 0000000000016c43 [ 93.425435] [ 93.427037] Uninit was stored to memory at: [ 93.431514] kmsan_internal_chain_origin+0x12b/0x210 [ 93.436594] __msan_chain_origin+0x69/0xc0 [ 93.440808] enqueue_task_fair+0x15b1/0x43a0 [ 93.445192] try_to_wake_up+0x13cc/0x20a0 [ 93.449318] wake_up_process+0x34/0x40 [ 93.453184] hrtimer_wakeup+0xac/0x100 [ 93.457050] __hrtimer_run_queues+0xc03/0x15d0 [ 93.461611] hrtimer_interrupt+0x426/0xaf0 [ 93.465826] local_apic_timer_interrupt+0x66/0x230 [ 93.470737] smp_apic_timer_interrupt+0x5a/0x90 [ 93.475380] Uninit was stored to memory at: [ 93.479681] kmsan_internal_chain_origin+0x12b/0x210 [ 93.484761] __msan_chain_origin+0x69/0xc0 [ 93.488977] reweight_entity+0x1607/0x1a30 [ 93.493189] enqueue_task_fair+0x40ea/0x43a0 [ 93.497574] try_to_wake_up+0x13cc/0x20a0 [ 93.501698] wake_up_process+0x34/0x40 [ 93.505563] hrtimer_wakeup+0xac/0x100 [ 93.509428] __hrtimer_run_queues+0xc03/0x15d0 [ 93.513988] hrtimer_interrupt+0x426/0xaf0 [ 93.518201] local_apic_timer_interrupt+0x66/0x230 [ 93.523113] smp_apic_timer_interrupt+0x5a/0x90 [ 93.527753] Uninit was stored to memory at: [ 93.532052] kmsan_internal_chain_origin+0x12b/0x210 [ 93.537134] __msan_chain_origin+0x69/0xc0 [ 93.541348] reweight_entity+0x126b/0x1a30 [ 93.545560] enqueue_task_fair+0x40ea/0x43a0 [ 93.549945] try_to_wake_up+0x13cc/0x20a0 [ 93.554072] wake_up_process+0x34/0x40 [ 93.557936] hrtimer_wakeup+0xac/0x100 [ 93.561802] __hrtimer_run_queues+0xc03/0x15d0 [ 93.566365] hrtimer_interrupt+0x426/0xaf0 [ 93.570578] local_apic_timer_interrupt+0x66/0x230 [ 93.575488] smp_apic_timer_interrupt+0x5a/0x90 [ 93.580131] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave [ 93.587644] Variable was created at: [ 93.591337] _raw_spin_lock_irqsave+0x45/0xf0 [ 93.595809] hrtimer_interrupt+0x101/0xaf0 [ 93.600016] ================================================================== [ 93.607347] Disabling lock debugging due to kernel taint [ 93.612771] Kernel panic - not syncing: panic_on_warn set ... [ 93.612771] [ 93.620118] CPU: 0 PID: 3592 Comm: syz-executor0 Tainted: G B 4.16.0+ #84 [ 93.628235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.637566] Call Trace: [ 93.640135] dump_stack+0x185/0x1d0 [ 93.643742] panic+0x39d/0x940 [ 93.646932] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 93.651926] kmsan_report+0x238/0x240 [ 93.655706] __msan_warning_32+0x6c/0xb0 [ 93.659746] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 93.664572] update_load_avg+0xde6/0x2c20 [ 93.668698] ? dequeue_task_fair+0xf9/0x2ea0 [ 93.673096] dequeue_task_fair+0x12f/0x2ea0 [ 93.677405] ? enqueue_task_fair+0x43a0/0x43a0 [ 93.681966] deactivate_task+0x50d/0x780 [ 93.686009] __schedule+0x164/0x730 [ 93.689616] ? schedule+0x1cc/0x2f0 [ 93.693224] schedule+0x1cc/0x2f0 [ 93.696660] do_nanosleep+0x2c3/0x9b0 [ 93.700444] SYSC_nanosleep+0x420/0x6a0 [ 93.704397] ? hrtimer_init_sleeper+0xc0/0xc0 [ 93.708876] SyS_nanosleep+0x46/0x70 [ 93.712569] do_syscall_64+0x309/0x430 [ 93.716438] ? hrtimer_nanosleep+0x560/0x560 [ 93.720830] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 93.725997] RIP: 0033:0x480a30 [ 93.729165] RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 93.736851] RAX: ffffffffffffffda RBX: 0000000000000181 RCX: 0000000000480a30 [ 93.744099] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3eaa0 [ 93.751354] RBP: 0000000000016c43 R08: 0000000000000001 R09: 0000000000dc5940 [ 93.758602] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 93.765851] R13: 0000000000000003 R14: 0000000000000477 R15: 0000000000016c43 [ 94.888952] Shutting down cpus with NMI [ 94.904608] Dumping ftrace buffer: [ 94.908132] (ftrace buffer empty) [ 94.911820] Kernel Offset: disabled [ 94.915429] Rebooting in 86400 seconds..