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 '10.128.10.44' (ECDSA) to the list of known hosts. 2018/05/04 03:07:12 parsed 1 programs 2018/05/04 03:07:12 executed programs: 0 syzkaller login: [ 42.719573] IPVS: ftp: loaded support on port[0] = 21 [ 42.786509] IPVS: ftp: loaded support on port[0] = 21 [ 42.816530] IPVS: ftp: loaded support on port[0] = 21 [ 42.898341] IPVS: ftp: loaded support on port[0] = 21 [ 43.066255] IPVS: ftp: loaded support on port[0] = 21 [ 43.130872] IPVS: ftp: loaded support on port[0] = 21 [ 43.222569] IPVS: ftp: loaded support on port[0] = 21 [ 43.311184] IPVS: ftp: loaded support on port[0] = 21 2018/05/04 03:07:17 executed programs: 332 2018/05/04 03:07:22 executed programs: 683 2018/05/04 03:07:27 executed programs: 1035 [ 62.094647] ================================================================== [ 62.102068] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1344/0x1aa0 [ 62.109243] CPU: 0 PID: 4521 Comm: syz-executor4 Not tainted 4.16.0+ #87 [ 62.116066] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.125400] Call Trace: [ 62.127981] dump_stack+0x185/0x1d0 [ 62.131592] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 62.136597] kmsan_report+0x142/0x240 [ 62.140384] __msan_warning_32+0x6c/0xb0 [ 62.144430] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 62.149264] update_load_avg+0xde6/0x2c20 [ 62.153403] dequeue_task_fair+0x12f/0x2ea0 [ 62.157715] ? enqueue_task_fair+0x43a0/0x43a0 [ 62.162278] deactivate_task+0x50d/0x780 [ 62.166330] __schedule+0x164/0x730 [ 62.169943] ? schedule+0x1cc/0x2f0 [ 62.173558] schedule+0x1cc/0x2f0 [ 62.176995] do_nanosleep+0x2c3/0x9b0 [ 62.180784] SYSC_nanosleep+0x420/0x6a0 [ 62.184742] ? hrtimer_init_sleeper+0xc0/0xc0 [ 62.189231] SyS_nanosleep+0x46/0x70 [ 62.192930] do_syscall_64+0x309/0x430 [ 62.196802] ? hrtimer_nanosleep+0x560/0x560 [ 62.201194] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 62.206363] RIP: 0033:0x481080 [ 62.209533] RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 62.217223] RAX: ffffffffffffffda RBX: 00000000000000a4 RCX: 0000000000481080 [ 62.224486] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3eaa0 [ 62.231747] RBP: 000000000000f285 R08: 0000000000000001 R09: 0000000002715940 [ 62.239000] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 62.246248] R13: 0000000000000002 R14: 000000000000014a R15: 000000000000f267 [ 62.253500] [ 62.255107] Uninit was stored to memory at: [ 62.259422] kmsan_internal_chain_origin+0x12b/0x210 [ 62.264508] __msan_chain_origin+0x69/0xc0 [ 62.268727] dequeue_task_fair+0x16f0/0x2ea0 [ 62.273117] deactivate_task+0x50d/0x780 [ 62.277158] __schedule+0x164/0x730 [ 62.280766] do_task_dead+0xa4/0xd0 [ 62.285155] do_exit+0x340e/0x38d0 [ 62.288682] do_group_exit+0x1a0/0x360 [ 62.292552] get_signal+0x1320/0x1f20 [ 62.296332] do_signal+0xb8/0x1c80 [ 62.299859] prepare_exit_to_usermode+0x271/0x3a0 [ 62.304681] syscall_return_slowpath+0xe9/0x700 [ 62.309331] do_syscall_64+0x36d/0x430 [ 62.313200] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 62.318366] Uninit was stored to memory at: [ 62.322669] kmsan_internal_chain_origin+0x12b/0x210 [ 62.327755] __msan_chain_origin+0x69/0xc0 [ 62.331972] reweight_entity+0x126b/0x1a30 [ 62.336192] task_tick_fair+0x5f1/0x1040 [ 62.340236] scheduler_tick+0x28b/0x490 [ 62.344192] update_process_times+0x157/0x1a0 [ 62.348671] tick_sched_timer+0x33b/0x4b0 [ 62.352801] __hrtimer_run_queues+0xc03/0x15d0 [ 62.357363] hrtimer_interrupt+0x426/0xaf0 [ 62.361582] local_apic_timer_interrupt+0x66/0x230 [ 62.366497] smp_apic_timer_interrupt+0x5a/0x90 [ 62.371145] Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave [ 62.378656] Variable was created at: [ 62.382352] _raw_spin_lock_irqsave+0x45/0xf0 [ 62.386841] hrtimer_interrupt+0x101/0xaf0 [ 62.391053] ================================================================== [ 62.398388] Disabling lock debugging due to kernel taint [ 62.403819] Kernel panic - not syncing: panic_on_warn set ... [ 62.403819] [ 62.411167] CPU: 0 PID: 4521 Comm: syz-executor4 Tainted: G B 4.16.0+ #87 [ 62.419285] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.428619] Call Trace: [ 62.431193] dump_stack+0x185/0x1d0 [ 62.434895] panic+0x39d/0x940 [ 62.438092] ? update_cfs_rq_load_avg+0x1344/0x1aa0 [ 62.443094] kmsan_report+0x238/0x240 [ 62.446881] __msan_warning_32+0x6c/0xb0 [ 62.450945] update_cfs_rq_load_avg+0x1344/0x1aa0 [ 62.455806] update_load_avg+0xde6/0x2c20 [ 62.459950] dequeue_task_fair+0x12f/0x2ea0 [ 62.464262] ? enqueue_task_fair+0x43a0/0x43a0 [ 62.468834] deactivate_task+0x50d/0x780 [ 62.472899] __schedule+0x164/0x730 [ 62.476513] ? schedule+0x1cc/0x2f0 [ 62.480389] schedule+0x1cc/0x2f0 [ 62.483827] do_nanosleep+0x2c3/0x9b0 [ 62.487617] SYSC_nanosleep+0x420/0x6a0 [ 62.491575] ? hrtimer_init_sleeper+0xc0/0xc0 [ 62.496075] SyS_nanosleep+0x46/0x70 [ 62.499773] do_syscall_64+0x309/0x430 [ 62.503650] ? hrtimer_nanosleep+0x560/0x560 [ 62.508051] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 62.513222] RIP: 0033:0x481080 [ 62.516393] RSP: 002b:0000000000a3ea98 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 62.524088] RAX: ffffffffffffffda RBX: 00000000000000a4 RCX: 0000000000481080 [ 62.531339] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3eaa0 [ 62.538590] RBP: 000000000000f285 R08: 0000000000000001 R09: 0000000002715940 [ 62.545843] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 62.553099] R13: 0000000000000002 R14: 000000000000014a R15: 000000000000f267 [ 63.675990] Shutting down cpus with NMI [ 63.691608] Dumping ftrace buffer: [ 63.695142] (ftrace buffer empty) [ 63.698832] Kernel Offset: disabled [ 63.702447] Rebooting in 86400 seconds..