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 '10.128.0.10' (ECDSA) to the list of known hosts. 2018/05/05 17:16:21 parsed 1 programs 2018/05/05 17:16:21 executed programs: 0 syzkaller login: [ 83.677159] IPVS: ftp: loaded support on port[0] = 21 [ 83.723707] IPVS: ftp: loaded support on port[0] = 21 [ 83.774937] IPVS: ftp: loaded support on port[0] = 21 [ 83.818603] IPVS: ftp: loaded support on port[0] = 21 [ 83.951663] IPVS: ftp: loaded support on port[0] = 21 [ 84.122794] IPVS: ftp: loaded support on port[0] = 21 [ 84.203534] IPVS: ftp: loaded support on port[0] = 21 [ 84.279249] IPVS: ftp: loaded support on port[0] = 21 2018/05/05 17:16:26 executed programs: 223 [ 89.576646] ================================================================== [ 89.584069] BUG: KMSAN: uninit-value in get_page_from_freelist+0x5e50/0xb600 [ 89.591255] CPU: 1 PID: 5557 Comm: udevd Not tainted 4.16.0+ #87 [ 89.597388] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.606733] Call Trace: [ 89.609324] dump_stack+0x185/0x1d0 [ 89.612958] ? get_page_from_freelist+0x5e50/0xb600 [ 89.617976] kmsan_report+0x142/0x240 [ 89.621781] __msan_warning_32+0x6c/0xb0 [ 89.625842] get_page_from_freelist+0x5e50/0xb600 [ 89.630693] ? get_page_from_freelist+0xab28/0xb600 [ 89.635730] ? kernel_poison_pages+0x40/0x360 [ 89.640244] ? save_stack_trace+0xa5/0xf0 [ 89.644399] ? page_fault+0x45/0x50 [ 89.648033] ? kmsan_set_origin_inline+0x6b/0x120 [ 89.652880] ? __alloc_pages_nodemask+0xae2/0x5dc0 [ 89.657814] ? __next_zones_zonelist+0x15f/0x290 [ 89.662573] __alloc_pages_nodemask+0x789/0x5dc0 [ 89.667331] ? __alloc_pages_nodemask+0xf5b/0x5dc0 [ 89.672266] ? kernel_poison_pages+0x40/0x360 [ 89.676766] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 89.682133] ? kernel_poison_pages+0x1a0/0x360 [ 89.686725] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 89.692178] ? get_page_from_freelist+0xab28/0xb600 [ 89.697200] ? kmsan_memcpy_origins+0xf1/0x170 [ 89.701787] alloc_pages_current+0x6b5/0x970 [ 89.706197] get_zeroed_page+0x3f/0xd0 [ 89.710088] __pud_alloc+0xab/0x440 [ 89.713722] handle_mm_fault+0xdfd/0x7e50 [ 89.717868] ? follow_page_mask+0xa7/0x2920 [ 89.722224] __get_user_pages+0x176f/0x24d0 [ 89.726558] get_user_pages_remote+0x2a9/0xb30 [ 89.731163] ? copy_strings+0x7f6/0xfc0 [ 89.735144] get_arg_page+0x17f/0x840 [ 89.738948] ? _cond_resched+0x5e/0xd0 [ 89.742839] copy_strings+0x7f6/0xfc0 [ 89.746658] do_execveat_common+0x1bf5/0x2ce0 [ 89.751170] SYSC_execve+0xe2/0x110 [ 89.754800] SyS_execve+0x56/0x80 [ 89.758262] do_syscall_64+0x309/0x430 [ 89.762155] ? set_binfmt+0x1b0/0x1b0 [ 89.765958] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 89.771144] RIP: 0033:0x7f7189a1b207 [ 89.774850] RSP: 002b:00007ffc643bd9c8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b [ 89.782563] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f7189a1b207 [ 89.789848] RDX: 0000000001d76c10 RSI: 00007ffc643bdac0 RDI: 00007ffc643bead0 [ 89.797119] RBP: 0000000000625500 R08: 000000000000122a R09: 000000000000122a [ 89.804394] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001d76c10 [ 89.811663] R13: 0000000000000007 R14: 0000000001d72250 R15: 0000000000000005 [ 89.818929] [ 89.820549] Uninit was stored to memory at: [ 89.824883] kmsan_internal_chain_origin+0x12b/0x210 [ 89.830008] __msan_chain_origin+0x69/0xc0 [ 89.834246] free_unref_page_commit+0x4fb/0x530 [ 89.838917] free_pages+0x290/0x320 [ 89.842540] tlb_finish_mmu+0x3f7/0x5c0 [ 89.846514] exit_mmap+0x498/0x950 [ 89.850054] __mmput+0x16c/0x610 [ 89.853419] mmput+0xab/0xf0 [ 89.856436] exit_mm+0x6ed/0x7a0 [ 89.859799] do_exit+0xc01/0x38d0 [ 89.863256] do_group_exit+0x1a0/0x360 [ 89.867153] SYSC_exit_group+0x21/0x30 [ 89.871040] SyS_exit_group+0x25/0x30 [ 89.874840] do_syscall_64+0x309/0x430 [ 89.878738] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 89.883917] Local variable description: ----tlb@exit_mmap [ 89.889440] Variable was created at: [ 89.893155] exit_mmap+0x48/0x950 [ 89.896603] __mmput+0x16c/0x610 [ 89.899956] ================================================================== [ 89.907298] Disabling lock debugging due to kernel taint [ 89.912737] Kernel panic - not syncing: panic_on_warn set ... [ 89.912737] [ 89.920097] CPU: 1 PID: 5557 Comm: udevd Tainted: G B 4.16.0+ #87 [ 89.927534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.936879] Call Trace: [ 89.939468] dump_stack+0x185/0x1d0 [ 89.943101] panic+0x39d/0x940 [ 89.946318] ? get_page_from_freelist+0x5e50/0xb600 [ 89.951337] kmsan_report+0x238/0x240 [ 89.955142] __msan_warning_32+0x6c/0xb0 [ 89.959207] get_page_from_freelist+0x5e50/0xb600 [ 89.964053] ? get_page_from_freelist+0xab28/0xb600 [ 89.969077] ? kernel_poison_pages+0x40/0x360 [ 89.973587] ? save_stack_trace+0xa5/0xf0 [ 89.977740] ? page_fault+0x45/0x50 [ 89.981373] ? kmsan_set_origin_inline+0x6b/0x120 [ 89.986225] ? __alloc_pages_nodemask+0xae2/0x5dc0 [ 89.991159] ? __next_zones_zonelist+0x15f/0x290 [ 89.995916] __alloc_pages_nodemask+0x789/0x5dc0 [ 90.000671] ? __alloc_pages_nodemask+0xf5b/0x5dc0 [ 90.005602] ? kernel_poison_pages+0x40/0x360 [ 90.010095] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 90.015447] ? kernel_poison_pages+0x1a0/0x360 [ 90.020028] ? __msan_metadata_ptr_for_store_8+0x13/0x20 [ 90.025474] ? get_page_from_freelist+0xab28/0xb600 [ 90.030472] ? kmsan_memcpy_origins+0xf1/0x170 [ 90.035043] alloc_pages_current+0x6b5/0x970 [ 90.039430] get_zeroed_page+0x3f/0xd0 [ 90.043293] __pud_alloc+0xab/0x440 [ 90.046898] handle_mm_fault+0xdfd/0x7e50 [ 90.051028] ? follow_page_mask+0xa7/0x2920 [ 90.055335] __get_user_pages+0x176f/0x24d0 [ 90.059640] get_user_pages_remote+0x2a9/0xb30 [ 90.064202] ? copy_strings+0x7f6/0xfc0 [ 90.068156] get_arg_page+0x17f/0x840 [ 90.071934] ? _cond_resched+0x5e/0xd0 [ 90.075798] copy_strings+0x7f6/0xfc0 [ 90.079585] do_execveat_common+0x1bf5/0x2ce0 [ 90.084070] SYSC_execve+0xe2/0x110 [ 90.087677] SyS_execve+0x56/0x80 [ 90.091109] do_syscall_64+0x309/0x430 [ 90.094975] ? set_binfmt+0x1b0/0x1b0 [ 90.098755] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 90.103920] RIP: 0033:0x7f7189a1b207 [ 90.107606] RSP: 002b:00007ffc643bd9c8 EFLAGS: 00000202 ORIG_RAX: 000000000000003b [ 90.115292] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f7189a1b207 [ 90.122542] RDX: 0000000001d76c10 RSI: 00007ffc643bdac0 RDI: 00007ffc643bead0 [ 90.129791] RBP: 0000000000625500 R08: 000000000000122a R09: 000000000000122a [ 90.137044] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000001d76c10 [ 90.144296] R13: 0000000000000007 R14: 0000000001d72250 R15: 0000000000000005 [ 90.152038] Dumping ftrace buffer: [ 90.155557] (ftrace buffer empty) [ 90.159242] Kernel Offset: disabled [ 90.162844] Rebooting in 86400 seconds..