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 '10.128.0.13' (ECDSA) to the list of known hosts. 2018/04/20 01:55:32 parsed 1 programs 2018/04/20 01:55:32 executed programs: 0 2018/04/20 01:55:37 executed programs: 273 2018/04/20 01:55:42 executed programs: 523 2018/04/20 01:55:47 executed programs: 776 2018/04/20 01:55:52 executed programs: 1025 syzkaller login: [ 123.642395] ================================================================== [ 123.649920] BUG: KMSAN: uninit-value in __list_add_valid+0x1a2/0x450 [ 123.656431] CPU: 1 PID: 2181 Comm: udevd Not tainted 4.16.0+ #84 [ 123.662578] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 123.671935] Call Trace: [ 123.674526] [ 123.676667] dump_stack+0x185/0x1d0 [ 123.680276] ? __list_add_valid+0x1a2/0x450 [ 123.684607] kmsan_report+0x142/0x240 [ 123.688402] __msan_warning_32+0x6c/0xb0 [ 123.692446] __list_add_valid+0x1a2/0x450 [ 123.696592] enqueue_task_fair+0xe06/0x43a0 [ 123.700904] ? update_load_avg+0x2c20/0x2c20 [ 123.705298] try_to_wake_up+0x13cc/0x20a0 [ 123.709452] wake_up_process+0x34/0x40 [ 123.713332] hrtimer_wakeup+0xac/0x100 [ 123.717210] ? hrtimer_init_sleeper+0xc0/0xc0 [ 123.721693] __hrtimer_run_queues+0xc03/0x15d0 [ 123.726265] hrtimer_interrupt+0x426/0xaf0 [ 123.730488] ? hrtimer_init+0x5b0/0x5b0 [ 123.734532] local_apic_timer_interrupt+0x66/0x230 [ 123.739449] smp_apic_timer_interrupt+0x5a/0x90 [ 123.744112] apic_timer_interrupt+0xf/0x20 [ 123.748373] [ 123.750594] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0 [ 123.755848] RSP: 0000:ffff8801a6bffbc0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 123.763540] RAX: 00000000c200004b RBX: 00000000c200004b RCX: ffff8801a6bffc00 [ 123.770878] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 000000007c5828d9 [ 123.778129] RBP: ffff8801a6bffc60 R08: 0000000001080020 R09: 0000000000000002 [ 123.785379] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 123.792633] R13: ffffffff87cac880 R14: 0000000000000246 R15: ffff8801a733bb00 [ 123.799896] ? __do_page_fault+0xec4/0x1a10 [ 123.804201] ? handle_mm_fault+0xa5/0x7ba0 [ 123.808415] ? __do_page_fault+0xec4/0x1a10 [ 123.812716] ? __do_page_fault+0xec4/0x1a10 [ 123.817020] handle_mm_fault+0xa5/0x7ba0 [ 123.821064] ? kmsan_set_origin_inline+0x6b/0x120 [ 123.825890] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 123.831238] ? vmacache_find+0x33f/0x770 [ 123.835286] __do_page_fault+0xec4/0x1a10 [ 123.839425] ? page_fault+0x45/0x50 [ 123.843032] do_page_fault+0xd3/0x260 [ 123.846815] ? page_fault+0x2f/0x50 [ 123.850445] page_fault+0x45/0x50 [ 123.853880] RIP: 0033:0x407821 [ 123.857050] RSP: 002b:00007fff8c7f0ce0 EFLAGS: 00010206 [ 123.862395] RAX: 0000000000000000 RBX: 0000000001422250 RCX: 00000000ffffffff [ 123.869648] RDX: 00007fff8c7f3f30 RSI: 0000000000000002 RDI: 0000000000000007 [ 123.876899] RBP: 0000000000625500 R08: 0000000000000001 R09: 0000000000014f6e [ 123.884156] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff8c7f0db0 [ 123.891407] R13: 0000000000000001 R14: 00007fff8c7f0d44 R15: 0000000001422250 [ 123.898661] [ 123.900268] Uninit was stored to memory at: [ 123.904576] kmsan_internal_chain_origin+0x12b/0x210 [ 123.909671] __msan_chain_origin+0x69/0xc0 [ 123.913888] pick_next_task_fair+0x1edc/0x1f70 [ 123.918451] pick_next_task+0x1b4/0x410 [ 123.922415] __schedule+0x211/0x730 [ 123.926023] _cond_resched+0x5e/0xd0 [ 123.929728] unmap_page_range+0x35e0/0x3be0 [ 123.934037] unmap_single_vma+0x45b/0x5f0 [ 123.938166] unmap_vmas+0x1f4/0x360 [ 123.941771] exit_mmap+0x3da/0x950 [ 123.945294] __mmput+0x16c/0x610 [ 123.948642] mmput+0xab/0xf0 [ 123.951647] exit_mm+0x6ed/0x7a0 [ 123.954996] do_exit+0xc01/0x38d0 [ 123.958432] do_group_exit+0x1a0/0x360 [ 123.962304] get_signal+0x1320/0x1f20 [ 123.966096] do_signal+0xb8/0x1c80 [ 123.969653] prepare_exit_to_usermode+0x271/0x3a0 [ 123.974477] syscall_return_slowpath+0xe9/0x700 [ 123.979137] do_syscall_64+0x36d/0x430 [ 123.983011] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 123.988179] Uninit was stored to memory at: [ 123.992484] kmsan_internal_chain_origin+0x12b/0x210 [ 123.997569] __msan_chain_origin+0x69/0xc0 [ 124.001788] check_preempt_wakeup+0xba0/0x13b0 [ 124.006354] ttwu_do_wakeup+0x2eb/0x980 [ 124.010309] try_to_wake_up+0x14d0/0x20a0 [ 124.014442] default_wake_function+0x92/0xb0 [ 124.018831] __wake_up_locked+0x216/0x370 [ 124.022962] ep_poll_callback+0xd7c/0x11c0 [ 124.027179] __wake_up_common+0x44f/0xa60 [ 124.031316] __wake_up_common_lock+0x196/0x370 [ 124.035890] __wake_up_sync_key+0xcf/0x120 [ 124.040109] pipe_release+0x2cc/0x5a0 [ 124.043890] __fput+0x49e/0xa10 [ 124.047150] ____fput+0x37/0x40 [ 124.050411] task_work_run+0x243/0x2c0 [ 124.054280] do_exit+0x10e1/0x38d0 [ 124.057802] do_group_exit+0x1a0/0x360 [ 124.061669] SYSC_exit_group+0x21/0x30 [ 124.065539] SyS_exit_group+0x25/0x30 [ 124.069405] do_syscall_64+0x309/0x430 [ 124.073277] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 124.078447] Local variable description: ----wait.i@SYSC_epoll_wait [ 124.084750] Variable was created at: [ 124.088450] SYSC_epoll_wait+0x10f/0x17c0 [ 124.092579] SyS_epoll_wait+0x63/0x90 [ 124.096357] ================================================================== [ 124.103692] Disabling lock debugging due to kernel taint [ 124.109127] Kernel panic - not syncing: panic_on_warn set ... [ 124.109127] [ 124.116474] CPU: 1 PID: 2181 Comm: udevd Tainted: G B 4.16.0+ #84 [ 124.123899] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.133237] Call Trace: [ 124.135802] [ 124.137944] dump_stack+0x185/0x1d0 [ 124.141555] panic+0x39d/0x940 [ 124.144746] ? __list_add_valid+0x1a2/0x450 [ 124.149049] kmsan_report+0x238/0x240 [ 124.152844] __msan_warning_32+0x6c/0xb0 [ 124.156891] __list_add_valid+0x1a2/0x450 [ 124.161025] enqueue_task_fair+0xe06/0x43a0 [ 124.165336] ? update_load_avg+0x2c20/0x2c20 [ 124.169727] try_to_wake_up+0x13cc/0x20a0 [ 124.173862] wake_up_process+0x34/0x40 [ 124.177752] hrtimer_wakeup+0xac/0x100 [ 124.181623] ? hrtimer_init_sleeper+0xc0/0xc0 [ 124.186101] __hrtimer_run_queues+0xc03/0x15d0 [ 124.190672] hrtimer_interrupt+0x426/0xaf0 [ 124.194893] ? hrtimer_init+0x5b0/0x5b0 [ 124.198855] local_apic_timer_interrupt+0x66/0x230 [ 124.203772] smp_apic_timer_interrupt+0x5a/0x90 [ 124.208425] apic_timer_interrupt+0xf/0x20 [ 124.212641] [ 124.214863] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0 [ 124.220125] RSP: 0000:ffff8801a6bffbc0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 124.227815] RAX: 00000000c200004b RBX: 00000000c200004b RCX: ffff8801a6bffc00 [ 124.235068] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 000000007c5828d9 [ 124.242318] RBP: ffff8801a6bffc60 R08: 0000000001080020 R09: 0000000000000002 [ 124.249571] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 124.256822] R13: ffffffff87cac880 R14: 0000000000000246 R15: ffff8801a733bb00 [ 124.264087] ? __do_page_fault+0xec4/0x1a10 [ 124.268400] ? handle_mm_fault+0xa5/0x7ba0 [ 124.272633] ? __do_page_fault+0xec4/0x1a10 [ 124.276941] ? __do_page_fault+0xec4/0x1a10 [ 124.281244] handle_mm_fault+0xa5/0x7ba0 [ 124.285289] ? kmsan_set_origin_inline+0x6b/0x120 [ 124.290118] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 124.295461] ? vmacache_find+0x33f/0x770 [ 124.299508] __do_page_fault+0xec4/0x1a10 [ 124.303642] ? page_fault+0x45/0x50 [ 124.307250] do_page_fault+0xd3/0x260 [ 124.311136] ? page_fault+0x2f/0x50 [ 124.314746] page_fault+0x45/0x50 [ 124.318178] RIP: 0033:0x407821 [ 124.321350] RSP: 002b:00007fff8c7f0ce0 EFLAGS: 00010206 [ 124.326702] RAX: 0000000000000000 RBX: 0000000001422250 RCX: 00000000ffffffff [ 124.333958] RDX: 00007fff8c7f3f30 RSI: 0000000000000002 RDI: 0000000000000007 [ 124.341209] RBP: 0000000000625500 R08: 0000000000000001 R09: 0000000000014f6e [ 124.348461] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff8c7f0db0 [ 124.355711] R13: 0000000000000001 R14: 00007fff8c7f0d44 R15: 0000000001422250 [ 125.484718] Shutting down cpus with NMI [ 125.500508] Dumping ftrace buffer: [ 125.504037] (ftrace buffer empty) [ 125.507725] Kernel Offset: disabled [ 125.511334] Rebooting in 86400 seconds..