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 '10.128.0.28' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.153149] ================================================================== [ 44.160537] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 44.166401] CPU: 0 PID: 4525 Comm: syz-executor352 Not tainted 4.16.0+ #87 [ 44.173387] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.182718] Call Trace: [ 44.185288] dump_stack+0x185/0x1d0 [ 44.188893] ? pointer+0x11e5/0x1410 [ 44.192590] kmsan_report+0x142/0x240 [ 44.196377] __msan_warning_32+0x6c/0xb0 [ 44.200417] ? do_preadv+0x331/0x580 [ 44.204829] pointer+0x11e5/0x1410 [ 44.208356] ? do_preadv+0x3a1/0x580 [ 44.212053] vsnprintf+0xa2d/0x33c0 [ 44.215666] seq_printf+0x29f/0x420 [ 44.219280] ? save_stack_trace_tsk+0x26a/0x2f0 [ 44.223926] ? do_preadv+0x3a1/0x580 [ 44.227616] ? do_preadv+0x3a1/0x580 [ 44.231304] ? do_preadv+0x3a1/0x580 [ 44.234997] proc_pid_stack+0x326/0x470 [ 44.238956] proc_single_show+0x1af/0x300 [ 44.243097] ? proc_pid_wchan+0x250/0x250 [ 44.247224] ? proc_single_open+0x90/0x90 [ 44.251347] seq_read+0xc7d/0x2260 [ 44.254872] do_iter_read+0x880/0xd70 [ 44.258651] ? seq_open+0x360/0x360 [ 44.262254] do_preadv+0x3a1/0x580 [ 44.265776] ? syscall_return_slowpath+0xe9/0x700 [ 44.270598] SYSC_preadv+0xc6/0xe0 [ 44.274121] SyS_preadv+0x77/0xa0 [ 44.277568] do_syscall_64+0x309/0x430 [ 44.281450] ? SYSC_writev+0xb0/0xb0 [ 44.285144] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.290309] RIP: 0033:0x4400a9 [ 44.293473] RSP: 002b:00007ffdc549acc8 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 44.301155] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 44.308399] RDX: 0000000000000001 RSI: 0000000020000900 RDI: 0000000000000003 [ 44.315645] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 44.322894] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 44.330142] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 44.337388] [ 44.338990] Uninit was stored to memory at: [ 44.343295] kmsan_internal_chain_origin+0x12b/0x210 [ 44.348377] __msan_chain_origin+0x69/0xc0 [ 44.352590] __save_stack_trace+0x829/0xb00 [ 44.356889] save_stack_trace_tsk+0x258/0x2f0 [ 44.361361] proc_pid_stack+0x26a/0x470 [ 44.365313] proc_single_show+0x1af/0x300 [ 44.369438] seq_read+0xc7d/0x2260 [ 44.372963] do_iter_read+0x880/0xd70 [ 44.376739] do_preadv+0x3a1/0x580 [ 44.380260] SYSC_preadv+0xc6/0xe0 [ 44.383777] SyS_preadv+0x77/0xa0 [ 44.387205] do_syscall_64+0x309/0x430 [ 44.391080] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.396240] Uninit was stored to memory at: [ 44.400541] kmsan_internal_chain_origin+0x12b/0x210 [ 44.405619] __msan_chain_origin+0x69/0xc0 [ 44.409832] update_stack_state+0x959/0xa40 [ 44.414129] unwind_next_frame+0x618/0xe50 [ 44.418341] __save_stack_trace+0x734/0xb00 [ 44.422650] save_stack_trace_tsk+0x258/0x2f0 [ 44.427124] proc_pid_stack+0x26a/0x470 [ 44.431092] proc_single_show+0x1af/0x300 [ 44.435217] seq_read+0xc7d/0x2260 [ 44.438819] do_iter_read+0x880/0xd70 [ 44.442602] do_preadv+0x3a1/0x580 [ 44.446123] SYSC_preadv+0xc6/0xe0 [ 44.449645] SyS_preadv+0x77/0xa0 [ 44.453088] do_syscall_64+0x309/0x430 [ 44.456960] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.462123] Local variable description: ----nd@do_filp_open [ 44.467812] Variable was created at: [ 44.471520] do_filp_open+0x69/0x640 [ 44.475215] do_sys_open+0x624/0x960 [ 44.478900] ================================================================== [ 44.486233] Disabling lock debugging due to kernel taint [ 44.491656] Kernel panic - not syncing: panic_on_warn set ... [ 44.491656] [ 44.498996] CPU: 0 PID: 4525 Comm: syz-executor352 Tainted: G B 4.16.0+ #87 [ 44.507291] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.516632] Call Trace: [ 44.519214] dump_stack+0x185/0x1d0 [ 44.522831] panic+0x39d/0x940 [ 44.526016] ? pointer+0x11e5/0x1410 [ 44.529720] kmsan_report+0x238/0x240 [ 44.533499] __msan_warning_32+0x6c/0xb0 [ 44.537537] ? do_preadv+0x331/0x580 [ 44.541231] pointer+0x11e5/0x1410 [ 44.544746] ? do_preadv+0x3a1/0x580 [ 44.548446] vsnprintf+0xa2d/0x33c0 [ 44.552060] seq_printf+0x29f/0x420 [ 44.555677] ? save_stack_trace_tsk+0x26a/0x2f0 [ 44.560321] ? do_preadv+0x3a1/0x580 [ 44.564029] ? do_preadv+0x3a1/0x580 [ 44.567734] ? do_preadv+0x3a1/0x580 [ 44.571425] proc_pid_stack+0x326/0x470 [ 44.575395] proc_single_show+0x1af/0x300 [ 44.579519] ? proc_pid_wchan+0x250/0x250 [ 44.583645] ? proc_single_open+0x90/0x90 [ 44.587767] seq_read+0xc7d/0x2260 [ 44.591289] do_iter_read+0x880/0xd70 [ 44.595071] ? seq_open+0x360/0x360 [ 44.598674] do_preadv+0x3a1/0x580 [ 44.602199] ? syscall_return_slowpath+0xe9/0x700 [ 44.607029] SYSC_preadv+0xc6/0xe0 [ 44.610558] SyS_preadv+0x77/0xa0 [ 44.613988] do_syscall_64+0x309/0x430 [ 44.617859] ? SYSC_writev+0xb0/0xb0 [ 44.621550] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.626712] RIP: 0033:0x4400a9 [ 44.629876] RSP: 002b:00007ffdc549acc8 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 44.637558] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 44.644806] RDX: 0000000000000001 RSI: 0000000020000900 RDI: 0000000000000003 [ 44.652054] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 44.659304] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 44.666548] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 44.674266] Dumping ftrace buffer: [ 44.677785] (ftrace buffer empty) [ 44.681467] Kernel Offset: disabled [ 44.685071] Rebooting in 86400 seconds..