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 '10.128.0.22' (ECDSA) to the list of known hosts. 2018/04/30 06:50:09 parsed 1 programs 2018/04/30 06:50:09 executed programs: 0 syzkaller login: [ 58.675560] IPVS: ftp: loaded support on port[0] = 21 [ 58.762206] IPVS: ftp: loaded support on port[0] = 21 [ 58.794691] IPVS: ftp: loaded support on port[0] = 21 [ 58.889251] IPVS: ftp: loaded support on port[0] = 21 [ 59.059368] IPVS: ftp: loaded support on port[0] = 21 [ 59.209491] IPVS: ftp: loaded support on port[0] = 21 [ 59.304238] IPVS: ftp: loaded support on port[0] = 21 [ 59.399429] IPVS: ftp: loaded support on port[0] = 21 [ 62.067067] ================================================================== [ 62.074515] BUG: KMSAN: uninit-value in rcu_cblist_dequeue+0x1bb/0x290 [ 62.081180] CPU: 1 PID: 4970 Comm: blkid Not tainted 4.16.0+ #87 [ 62.087317] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.096672] Call Trace: [ 62.099255] [ 62.101413] dump_stack+0x185/0x1d0 [ 62.105048] ? rcu_cblist_dequeue+0x1bb/0x290 [ 62.109545] kmsan_report+0x142/0x240 [ 62.113380] __msan_warning_32+0x6c/0xb0 [ 62.117446] rcu_cblist_dequeue+0x1bb/0x290 [ 62.121770] ? put_filp+0x160/0x160 [ 62.125403] rcu_process_callbacks+0x17cf/0x2070 [ 62.130173] ? rcu_scheduler_starting+0xe0/0xe0 [ 62.134844] __do_softirq+0x56d/0x93d [ 62.138659] irq_exit+0x202/0x240 [ 62.142119] exiting_irq+0xe/0x10 [ 62.145576] smp_apic_timer_interrupt+0x64/0x90 [ 62.150247] apic_timer_interrupt+0xf/0x20 [ 62.154473] [ 62.156712] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0 [ 62.161980] RSP: 0000:ffff8801a42bfa20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 62.169687] RAX: 00000000b8800006 RBX: 00000000b8800006 RCX: ffff8801a42bfa60 [ 62.176953] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 00000000776b7604 [ 62.184220] RBP: ffff8801a42bfac0 R08: 0000000001080020 R09: 0000000000000002 [ 62.191486] R10: 0000000000000000 R11: ffff8801a42b0000 R12: 0000000000000000 [ 62.198753] R13: ffffffff8aa7b990 R14: 0000000000000246 R15: ffff8801a4ef8000 [ 62.206044] ? kmem_cache_alloc+0xf9/0xb90 [ 62.210285] ? _cond_resched+0x2b/0xd0 [ 62.214172] ? kmem_cache_alloc+0xf9/0xb90 [ 62.218423] _cond_resched+0x2b/0xd0 [ 62.222134] kmem_cache_alloc+0xf9/0xb90 [ 62.226202] ? __anon_vma_prepare+0x1c6/0xb10 [ 62.230696] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 62.236059] ? find_mergeable_anon_vma+0x5c9/0xce0 [ 62.240993] ? rcu_all_qs+0x32/0x1f0 [ 62.244716] __anon_vma_prepare+0x1c6/0xb10 [ 62.249036] ? kmsan_set_origin+0x9e/0x160 [ 62.253277] handle_mm_fault+0x5788/0x7e50 [ 62.257512] ? kmsan_set_origin_inline+0x6b/0x120 [ 62.262369] __do_page_fault+0xec4/0x1a10 [ 62.266526] ? page_fault+0x45/0x50 [ 62.270153] do_page_fault+0xd3/0x260 [ 62.273955] ? page_fault+0x2f/0x50 [ 62.277577] page_fault+0x45/0x50 [ 62.281030] RIP: 0033:0x7f931e616c57 [ 62.284740] RSP: 002b:00007ffcbf34fe00 EFLAGS: 00010202 [ 62.290103] RAX: 0000000000000005 RBX: 00007ffcbf34feb0 RCX: 00007f931e61ac53 [ 62.297369] RDX: 00007ffcbf34fee8 RSI: 00007f931e6044b0 RDI: 00007ffcbf34feb8 [ 62.304663] RBP: 00007f931e6044b0 R08: 0000000000000002 R09: 00000024907abff8 [ 62.311928] R10: 000000006fffff6e R11: 000000006ffffeff R12: 00007f931e602a78 [ 62.319196] R13: 00007f931e602000 R14: 00007f931e602a78 R15: 00007f931e602380 [ 62.326462] [ 62.328107] Uninit was stored to memory at: [ 62.332441] kmsan_internal_chain_origin+0x12b/0x210 [ 62.337556] __msan_chain_origin+0x69/0xc0 [ 62.341802] rcu_cblist_dequeue+0x1e0/0x290 [ 62.346124] rcu_process_callbacks+0x15cd/0x2070 [ 62.350886] __do_softirq+0x56d/0x93d [ 62.354722] Uninit was stored to memory at: [ 62.359048] kmsan_internal_chain_origin+0x12b/0x210 [ 62.364149] __msan_chain_origin+0x69/0xc0 [ 62.368385] rcu_segcblist_enqueue+0x24c/0x2d0 [ 62.372965] __call_rcu+0x227/0xef0 [ 62.376596] call_rcu_sched+0x32/0x40 [ 62.380393] free_pid+0x441/0x450 [ 62.383844] detach_pid+0x35a/0x370 [ 62.387479] release_task+0x10a0/0x2530 [ 62.391455] do_exit+0x2d91/0x38d0 [ 62.394996] do_group_exit+0x1a0/0x360 [ 62.398887] get_signal+0x1320/0x1f20 [ 62.402692] do_signal+0xb8/0x1c80 [ 62.406231] prepare_exit_to_usermode+0x271/0x3a0 [ 62.411076] syscall_return_slowpath+0xe9/0x700 [ 62.415741] do_syscall_64+0x36d/0x430 [ 62.419635] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 62.424811] Uninit was created at: [ 62.428352] kmsan_internal_poison_shadow+0xb8/0x1b0 [ 62.433458] kmsan_kmalloc+0x94/0x100 [ 62.437258] kmem_cache_alloc+0xaab/0xb90 [ 62.441402] alloc_pid+0x7f/0xce0 [ 62.444868] copy_process+0x3fb7/0x9bb0 [ 62.448848] _do_fork+0x311/0xf00 [ 62.452303] SYSC_clone+0xf6/0x110 [ 62.455838] SyS_clone+0x77/0xa0 [ 62.459206] do_syscall_64+0x309/0x430 [ 62.463097] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 62.468280] ================================================================== [ 62.475626] Disabling lock debugging due to kernel taint [ 62.481074] Kernel panic - not syncing: panic_on_warn set ... [ 62.481074] [ 62.488445] CPU: 1 PID: 4970 Comm: blkid Tainted: G B 4.16.0+ #87 [ 62.495890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.505245] Call Trace: [ 62.507826] [ 62.509991] dump_stack+0x185/0x1d0 [ 62.513626] panic+0x39d/0x940 [ 62.516846] ? rcu_cblist_dequeue+0x1bb/0x290 [ 62.521349] kmsan_report+0x238/0x240 [ 62.525154] __msan_warning_32+0x6c/0xb0 [ 62.529230] rcu_cblist_dequeue+0x1bb/0x290 [ 62.533565] ? put_filp+0x160/0x160 [ 62.537201] rcu_process_callbacks+0x17cf/0x2070 [ 62.541977] ? rcu_scheduler_starting+0xe0/0xe0 [ 62.546650] __do_softirq+0x56d/0x93d [ 62.550465] irq_exit+0x202/0x240 [ 62.553921] exiting_irq+0xe/0x10 [ 62.557373] smp_apic_timer_interrupt+0x64/0x90 [ 62.562047] apic_timer_interrupt+0xf/0x20 [ 62.566275] [ 62.568520] RIP: 0010:__msan_poison_alloca+0x14c/0x1d0 [ 62.573793] RSP: 0000:ffff8801a42bfa20 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 [ 62.581501] RAX: 00000000b8800006 RBX: 00000000b8800006 RCX: ffff8801a42bfa60 [ 62.588769] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 00000000776b7604 [ 62.596037] RBP: ffff8801a42bfac0 R08: 0000000001080020 R09: 0000000000000002 [ 62.603310] R10: 0000000000000000 R11: ffff8801a42b0000 R12: 0000000000000000 [ 62.610581] R13: ffffffff8aa7b990 R14: 0000000000000246 R15: ffff8801a4ef8000 [ 62.617878] ? kmem_cache_alloc+0xf9/0xb90 [ 62.622122] ? _cond_resched+0x2b/0xd0 [ 62.626018] ? kmem_cache_alloc+0xf9/0xb90 [ 62.630265] _cond_resched+0x2b/0xd0 [ 62.633991] kmem_cache_alloc+0xf9/0xb90 [ 62.638064] ? __anon_vma_prepare+0x1c6/0xb10 [ 62.642566] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 62.647938] ? find_mergeable_anon_vma+0x5c9/0xce0 [ 62.652874] ? rcu_all_qs+0x32/0x1f0 [ 62.656599] __anon_vma_prepare+0x1c6/0xb10 [ 62.660922] ? kmsan_set_origin+0x9e/0x160 [ 62.665162] handle_mm_fault+0x5788/0x7e50 [ 62.669398] ? kmsan_set_origin_inline+0x6b/0x120 [ 62.674260] __do_page_fault+0xec4/0x1a10 [ 62.678441] ? page_fault+0x45/0x50 [ 62.682119] do_page_fault+0xd3/0x260 [ 62.685929] ? page_fault+0x2f/0x50 [ 62.689563] page_fault+0x45/0x50 [ 62.693019] RIP: 0033:0x7f931e616c57 [ 62.696725] RSP: 002b:00007ffcbf34fe00 EFLAGS: 00010202 [ 62.702085] RAX: 0000000000000005 RBX: 00007ffcbf34feb0 RCX: 00007f931e61ac53 [ 62.709352] RDX: 00007ffcbf34fee8 RSI: 00007f931e6044b0 RDI: 00007ffcbf34feb8 [ 62.716619] RBP: 00007f931e6044b0 R08: 0000000000000002 R09: 00000024907abff8 [ 62.723886] R10: 000000006fffff6e R11: 000000006ffffeff R12: 00007f931e602a78 [ 62.731155] R13: 00007f931e602000 R14: 00007f931e602a78 R15: 00007f931e602380 [ 62.738929] Dumping ftrace buffer: [ 62.742454] (ftrace buffer empty) [ 62.746139] Kernel Offset: disabled [ 62.749741] Rebooting in 86400 seconds..