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 '10.128.10.16' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.172425] ================================================================== [ 42.179807] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.185668] CPU: 0 PID: 4488 Comm: syz-executor230 Not tainted 4.16.0+ #87 [ 42.192655] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.201981] Call Trace: [ 42.204544] dump_stack+0x185/0x1d0 [ 42.208145] ? pointer+0x11e5/0x1410 [ 42.211835] kmsan_report+0x142/0x240 [ 42.215615] __msan_warning_32+0x6c/0xb0 [ 42.219651] ? do_preadv+0x331/0x580 [ 42.223343] pointer+0x11e5/0x1410 [ 42.226861] ? do_preadv+0x3a1/0x580 [ 42.230559] vsnprintf+0xa2d/0x33c0 [ 42.234164] seq_printf+0x29f/0x420 [ 42.237778] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.242420] ? do_preadv+0x3a1/0x580 [ 42.246107] ? do_preadv+0x3a1/0x580 [ 42.249795] ? do_preadv+0x3a1/0x580 [ 42.253485] proc_pid_stack+0x326/0x470 [ 42.257437] proc_single_show+0x1af/0x300 [ 42.261561] ? proc_pid_wchan+0x250/0x250 [ 42.265687] ? proc_single_open+0x90/0x90 [ 42.269809] seq_read+0xc7d/0x2260 [ 42.273336] do_iter_read+0x880/0xd70 [ 42.277119] ? seq_open+0x360/0x360 [ 42.280721] do_preadv+0x3a1/0x580 [ 42.284243] SYSC_preadv+0xc6/0xe0 [ 42.287762] SyS_preadv+0x77/0xa0 [ 42.291193] do_syscall_64+0x309/0x430 [ 42.295063] ? SYSC_writev+0xb0/0xb0 [ 42.298756] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.303919] RIP: 0033:0x4400a9 [ 42.307084] RSP: 002b:00007ffe48d75948 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 42.314766] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 42.322792] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 42.330044] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.337296] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 42.344541] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 42.351795] [ 42.353400] Uninit was stored to memory at: [ 42.357699] kmsan_internal_chain_origin+0x12b/0x210 [ 42.362778] __msan_chain_origin+0x69/0xc0 [ 42.366988] __save_stack_trace+0x829/0xb00 [ 42.371286] save_stack_trace_tsk+0x258/0x2f0 [ 42.375764] proc_pid_stack+0x26a/0x470 [ 42.379724] proc_single_show+0x1af/0x300 [ 42.383847] seq_read+0xc7d/0x2260 [ 42.387362] do_iter_read+0x880/0xd70 [ 42.391136] do_preadv+0x3a1/0x580 [ 42.394652] SYSC_preadv+0xc6/0xe0 [ 42.398168] SyS_preadv+0x77/0xa0 [ 42.401594] do_syscall_64+0x309/0x430 [ 42.405460] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.410621] Uninit was stored to memory at: [ 42.414917] kmsan_internal_chain_origin+0x12b/0x210 [ 42.419994] __msan_chain_origin+0x69/0xc0 [ 42.424213] update_stack_state+0x959/0xa40 [ 42.428518] unwind_next_frame+0x618/0xe50 [ 42.432730] __save_stack_trace+0x734/0xb00 [ 42.437038] save_stack_trace_tsk+0x258/0x2f0 [ 42.441517] proc_pid_stack+0x26a/0x470 [ 42.445468] proc_single_show+0x1af/0x300 [ 42.449592] seq_read+0xc7d/0x2260 [ 42.453108] do_iter_read+0x880/0xd70 [ 42.456881] do_preadv+0x3a1/0x580 [ 42.460395] SYSC_preadv+0xc6/0xe0 [ 42.463911] SyS_preadv+0x77/0xa0 [ 42.467342] do_syscall_64+0x309/0x430 [ 42.471207] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.476367] Local variable description: ----nd@do_filp_open [ 42.482054] Variable was created at: [ 42.485750] do_filp_open+0x69/0x640 [ 42.489439] do_sys_open+0x624/0x960 [ 42.493124] ================================================================== [ 42.500454] Disabling lock debugging due to kernel taint [ 42.505873] Kernel panic - not syncing: panic_on_warn set ... [ 42.505873] [ 42.513211] CPU: 0 PID: 4488 Comm: syz-executor230 Tainted: G B 4.16.0+ #87 [ 42.521497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.530825] Call Trace: [ 42.533396] dump_stack+0x185/0x1d0 [ 42.537001] panic+0x39d/0x940 [ 42.540187] ? pointer+0x11e5/0x1410 [ 42.543875] kmsan_report+0x238/0x240 [ 42.547651] __msan_warning_32+0x6c/0xb0 [ 42.551686] ? do_preadv+0x331/0x580 [ 42.555375] pointer+0x11e5/0x1410 [ 42.558890] ? do_preadv+0x3a1/0x580 [ 42.562581] vsnprintf+0xa2d/0x33c0 [ 42.566195] seq_printf+0x29f/0x420 [ 42.569806] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.574449] ? do_preadv+0x3a1/0x580 [ 42.578139] ? do_preadv+0x3a1/0x580 [ 42.581829] ? do_preadv+0x3a1/0x580 [ 42.585522] proc_pid_stack+0x326/0x470 [ 42.589477] proc_single_show+0x1af/0x300 [ 42.593608] ? proc_pid_wchan+0x250/0x250 [ 42.597734] ? proc_single_open+0x90/0x90 [ 42.601859] seq_read+0xc7d/0x2260 [ 42.605380] do_iter_read+0x880/0xd70 [ 42.609159] ? seq_open+0x360/0x360 [ 42.612759] do_preadv+0x3a1/0x580 [ 42.616281] SYSC_preadv+0xc6/0xe0 [ 42.619797] SyS_preadv+0x77/0xa0 [ 42.623227] do_syscall_64+0x309/0x430 [ 42.627095] ? SYSC_writev+0xb0/0xb0 [ 42.630785] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.635950] RIP: 0033:0x4400a9 [ 42.639114] RSP: 002b:00007ffe48d75948 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 42.646795] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 42.654044] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 42.661299] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.668544] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 42.675797] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 42.683492] Dumping ftrace buffer: [ 42.687013] (ftrace buffer empty) [ 42.690695] Kernel Offset: disabled [ 42.694295] Rebooting in 86400 seconds..