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 '10.128.10.14' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.201367] ================================================================== [ 40.208799] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 40.214678] CPU: 0 PID: 4509 Comm: syz-executor109 Not tainted 4.16.0+ #87 [ 40.221679] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.231016] Call Trace: [ 40.233605] dump_stack+0x185/0x1d0 [ 40.237218] ? pointer+0x11e5/0x1410 [ 40.240922] kmsan_report+0x142/0x240 [ 40.244708] __msan_warning_32+0x6c/0xb0 [ 40.248757] ? proc_pid_stack+0x251/0x470 [ 40.252889] pointer+0x11e5/0x1410 [ 40.256416] ? proc_pid_stack+0x26a/0x470 [ 40.260547] vsnprintf+0xa2d/0x33c0 [ 40.264160] seq_printf+0x29f/0x420 [ 40.267784] ? proc_pid_stack+0x26a/0x470 [ 40.271914] ? proc_pid_stack+0x26a/0x470 [ 40.276056] ? proc_pid_stack+0x26a/0x470 [ 40.280195] proc_pid_stack+0x326/0x470 [ 40.284177] proc_single_show+0x1af/0x300 [ 40.288306] ? proc_pid_wchan+0x250/0x250 [ 40.292435] ? proc_single_open+0x90/0x90 [ 40.296562] seq_read+0xc7d/0x2260 [ 40.300085] ? __fsnotify_parent+0x75/0x560 [ 40.304392] ? seq_open+0x360/0x360 [ 40.308006] __vfs_read+0x1a5/0x9b0 [ 40.311622] vfs_read+0x36c/0x6c0 [ 40.315082] SYSC_read+0x172/0x360 [ 40.318606] SyS_read+0x55/0x80 [ 40.321869] do_syscall_64+0x309/0x430 [ 40.325744] ? vfs_write+0x8d0/0x8d0 [ 40.329441] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.334610] RIP: 0033:0x440089 [ 40.337781] RSP: 002b:00007ffd194a32f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000000 [ 40.345471] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 40.352721] RDX: 0000000000000086 RSI: 0000000020000040 RDI: 0000000000000003 [ 40.359975] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 40.367232] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 40.374485] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 40.381738] [ 40.383351] Uninit was stored to memory at: [ 40.387666] kmsan_internal_chain_origin+0x12b/0x210 [ 40.392751] __msan_chain_origin+0x69/0xc0 [ 40.396975] __save_stack_trace+0x829/0xb00 [ 40.401302] save_stack_trace_tsk+0x258/0x2f0 [ 40.405787] proc_pid_stack+0x26a/0x470 [ 40.409751] proc_single_show+0x1af/0x300 [ 40.413881] seq_read+0xc7d/0x2260 [ 40.417409] __vfs_read+0x1a5/0x9b0 [ 40.421022] vfs_read+0x36c/0x6c0 [ 40.424463] SYSC_read+0x172/0x360 [ 40.427988] SyS_read+0x55/0x80 [ 40.431346] do_syscall_64+0x309/0x430 [ 40.435217] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.440401] Uninit was stored to memory at: [ 40.444709] kmsan_internal_chain_origin+0x12b/0x210 [ 40.449807] __msan_chain_origin+0x69/0xc0 [ 40.454037] update_stack_state+0x959/0xa40 [ 40.458342] unwind_next_frame+0x618/0xe50 [ 40.462565] __save_stack_trace+0x734/0xb00 [ 40.466870] save_stack_trace_tsk+0x258/0x2f0 [ 40.471351] proc_pid_stack+0x26a/0x470 [ 40.475308] proc_single_show+0x1af/0x300 [ 40.479439] seq_read+0xc7d/0x2260 [ 40.482961] __vfs_read+0x1a5/0x9b0 [ 40.486576] vfs_read+0x36c/0x6c0 [ 40.490010] SYSC_read+0x172/0x360 [ 40.493548] SyS_read+0x55/0x80 [ 40.496805] do_syscall_64+0x309/0x430 [ 40.500676] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.505849] Local variable description: ----wait.i@try_charge [ 40.511799] Variable was created at: [ 40.515495] try_charge+0x105/0x2fd0 [ 40.519185] mem_cgroup_try_charge+0xa80/0xf00 [ 40.523742] ================================================================== [ 40.531187] Disabling lock debugging due to kernel taint [ 40.536617] Kernel panic - not syncing: panic_on_warn set ... [ 40.536617] [ 40.543965] CPU: 0 PID: 4509 Comm: syz-executor109 Tainted: G B 4.16.0+ #87 [ 40.552256] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.561603] Call Trace: [ 40.564264] dump_stack+0x185/0x1d0 [ 40.567886] panic+0x39d/0x940 [ 40.571072] ? pointer+0x11e5/0x1410 [ 40.574771] kmsan_report+0x238/0x240 [ 40.578642] __msan_warning_32+0x6c/0xb0 [ 40.582692] ? proc_pid_stack+0x251/0x470 [ 40.586823] pointer+0x11e5/0x1410 [ 40.590347] ? proc_pid_stack+0x26a/0x470 [ 40.594478] vsnprintf+0xa2d/0x33c0 [ 40.598092] seq_printf+0x29f/0x420 [ 40.601715] ? proc_pid_stack+0x26a/0x470 [ 40.605846] ? proc_pid_stack+0x26a/0x470 [ 40.609990] ? proc_pid_stack+0x26a/0x470 [ 40.614124] proc_pid_stack+0x326/0x470 [ 40.618106] proc_single_show+0x1af/0x300 [ 40.622248] ? proc_pid_wchan+0x250/0x250 [ 40.626475] ? proc_single_open+0x90/0x90 [ 40.630614] seq_read+0xc7d/0x2260 [ 40.634139] ? __fsnotify_parent+0x75/0x560 [ 40.638453] ? seq_open+0x360/0x360 [ 40.642077] __vfs_read+0x1a5/0x9b0 [ 40.645837] vfs_read+0x36c/0x6c0 [ 40.649286] SYSC_read+0x172/0x360 [ 40.652809] SyS_read+0x55/0x80 [ 40.656073] do_syscall_64+0x309/0x430 [ 40.659947] ? vfs_write+0x8d0/0x8d0 [ 40.663647] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.668824] RIP: 0033:0x440089 [ 40.671992] RSP: 002b:00007ffd194a32f8 EFLAGS: 00000213 ORIG_RAX: 0000000000000000 [ 40.679693] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 40.686952] RDX: 0000000000000086 RSI: 0000000020000040 RDI: 0000000000000003 [ 40.694204] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 40.701461] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401910 [ 40.708718] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 40.716698] Dumping ftrace buffer: [ 40.720235] (ftrace buffer empty) [ 40.723931] Kernel Offset: disabled [ 40.727637] Rebooting in 86400 seconds..