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: [ 42.309090] ================================================================== [ 42.316476] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.322342] CPU: 0 PID: 4484 Comm: syzkaller540026 Not tainted 4.16.0+ #85 [ 42.329345] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.338675] Call Trace: [ 42.341242] dump_stack+0x185/0x1d0 [ 42.344843] ? pointer+0x11e5/0x1410 [ 42.348535] kmsan_report+0x142/0x240 [ 42.352311] __msan_warning_32+0x6c/0xb0 [ 42.356353] ? proc_pid_stack+0x1e1/0x470 [ 42.360483] pointer+0x11e5/0x1410 [ 42.364007] ? proc_pid_stack+0x26a/0x470 [ 42.368139] vsnprintf+0xa2d/0x33c0 [ 42.371744] seq_printf+0x29f/0x420 [ 42.375356] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.380015] ? proc_pid_stack+0x26a/0x470 [ 42.384149] ? proc_pid_stack+0x26a/0x470 [ 42.388275] ? proc_pid_stack+0x26a/0x470 [ 42.392400] proc_pid_stack+0x326/0x470 [ 42.396361] proc_single_show+0x1af/0x300 [ 42.400492] ? proc_pid_wchan+0x250/0x250 [ 42.404615] ? proc_single_open+0x90/0x90 [ 42.408737] seq_read+0xc7d/0x2260 [ 42.412262] do_iter_read+0x880/0xd70 [ 42.416051] ? seq_open+0x360/0x360 [ 42.419653] do_readv+0x295/0x5f0 [ 42.423090] SYSC_readv+0x9b/0xb0 [ 42.426520] SyS_readv+0x56/0x80 [ 42.429862] do_syscall_64+0x309/0x430 [ 42.433728] ? vfs_readv+0x260/0x260 [ 42.437420] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.442584] RIP: 0033:0x4400a9 [ 42.445749] RSP: 002b:00007ffd1ee35048 EFLAGS: 00000213 ORIG_RAX: 0000000000000013 [ 42.453432] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 42.460679] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 42.467924] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.475170] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 42.482414] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 42.489669] [ 42.491268] Uninit was stored to memory at: [ 42.495570] kmsan_internal_chain_origin+0x12b/0x210 [ 42.500647] __msan_chain_origin+0x69/0xc0 [ 42.504860] __save_stack_trace+0x829/0xb00 [ 42.509157] save_stack_trace_tsk+0x258/0x2f0 [ 42.513630] proc_pid_stack+0x26a/0x470 [ 42.517580] proc_single_show+0x1af/0x300 [ 42.521702] seq_read+0xc7d/0x2260 [ 42.525217] do_iter_read+0x880/0xd70 [ 42.528992] do_readv+0x295/0x5f0 [ 42.532432] SYSC_readv+0x9b/0xb0 [ 42.535861] SyS_readv+0x56/0x80 [ 42.539210] do_syscall_64+0x309/0x430 [ 42.543072] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.548231] Uninit was stored to memory at: [ 42.552527] kmsan_internal_chain_origin+0x12b/0x210 [ 42.557608] __msan_chain_origin+0x69/0xc0 [ 42.561819] update_stack_state+0x959/0xa40 [ 42.566115] unwind_next_frame+0x618/0xe50 [ 42.570329] __save_stack_trace+0x734/0xb00 [ 42.574627] save_stack_trace_tsk+0x258/0x2f0 [ 42.579100] proc_pid_stack+0x26a/0x470 [ 42.583053] proc_single_show+0x1af/0x300 [ 42.587175] seq_read+0xc7d/0x2260 [ 42.590691] do_iter_read+0x880/0xd70 [ 42.594465] do_readv+0x295/0x5f0 [ 42.597895] SYSC_readv+0x9b/0xb0 [ 42.601328] SyS_readv+0x56/0x80 [ 42.604674] do_syscall_64+0x309/0x430 [ 42.608536] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.613701] Local variable description: ----flags.i.i.i@rcu_all_qs [ 42.620009] Variable was created at: [ 42.623710] rcu_all_qs+0x32/0x1f0 [ 42.627224] _cond_resched+0x3c/0xd0 [ 42.630907] ================================================================== [ 42.638235] Disabling lock debugging due to kernel taint [ 42.643655] Kernel panic - not syncing: panic_on_warn set ... [ 42.643655] [ 42.651009] CPU: 0 PID: 4484 Comm: syzkaller540026 Tainted: G B 4.16.0+ #85 [ 42.659309] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.668646] Call Trace: [ 42.671214] dump_stack+0x185/0x1d0 [ 42.674820] panic+0x39d/0x940 [ 42.677998] ? pointer+0x11e5/0x1410 [ 42.681710] kmsan_report+0x238/0x240 [ 42.685490] __msan_warning_32+0x6c/0xb0 [ 42.689530] ? proc_pid_stack+0x1e1/0x470 [ 42.693652] pointer+0x11e5/0x1410 [ 42.697169] ? proc_pid_stack+0x26a/0x470 [ 42.701294] vsnprintf+0xa2d/0x33c0 [ 42.704901] seq_printf+0x29f/0x420 [ 42.708514] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.713160] ? proc_pid_stack+0x26a/0x470 [ 42.717282] ? proc_pid_stack+0x26a/0x470 [ 42.721410] ? proc_pid_stack+0x26a/0x470 [ 42.725534] proc_pid_stack+0x326/0x470 [ 42.729486] proc_single_show+0x1af/0x300 [ 42.733613] ? proc_pid_wchan+0x250/0x250 [ 42.737735] ? proc_single_open+0x90/0x90 [ 42.741871] seq_read+0xc7d/0x2260 [ 42.745393] do_iter_read+0x880/0xd70 [ 42.749171] ? seq_open+0x360/0x360 [ 42.752775] do_readv+0x295/0x5f0 [ 42.756211] SYSC_readv+0x9b/0xb0 [ 42.759643] SyS_readv+0x56/0x80 [ 42.762984] do_syscall_64+0x309/0x430 [ 42.766849] ? vfs_readv+0x260/0x260 [ 42.770543] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.775710] RIP: 0033:0x4400a9 [ 42.778876] RSP: 002b:00007ffd1ee35048 EFLAGS: 00000213 ORIG_RAX: 0000000000000013 [ 42.786558] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 42.793804] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 42.801053] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.808311] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 42.815563] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 42.823251] Dumping ftrace buffer: [ 42.826770] (ftrace buffer empty) [ 42.830452] Kernel Offset: disabled [ 42.834050] Rebooting in 86400 seconds..