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 '10.128.0.7' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.518372] ================================================================== [ 43.525802] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 43.531678] CPU: 1 PID: 4503 Comm: syz-executor751 Not tainted 4.16.0+ #87 [ 43.538667] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.548001] Call Trace: [ 43.550591] dump_stack+0x185/0x1d0 [ 43.554208] ? pointer+0x11e5/0x1410 [ 43.557907] kmsan_report+0x142/0x240 [ 43.561695] __msan_warning_32+0x6c/0xb0 [ 43.565743] ? proc_pid_stack+0x251/0x470 [ 43.569872] pointer+0x11e5/0x1410 [ 43.573396] ? proc_pid_stack+0x26a/0x470 [ 43.577524] vsnprintf+0xa2d/0x33c0 [ 43.581136] seq_printf+0x29f/0x420 [ 43.584773] ? proc_pid_stack+0x26a/0x470 [ 43.588903] ? proc_pid_stack+0x26a/0x470 [ 43.593040] ? proc_pid_stack+0x26a/0x470 [ 43.597188] proc_pid_stack+0x326/0x470 [ 43.601156] proc_single_show+0x1af/0x300 [ 43.605298] ? proc_pid_wchan+0x250/0x250 [ 43.609427] ? proc_single_open+0x90/0x90 [ 43.613566] traverse+0x3c4/0xe60 [ 43.617009] ? __msan_poison_alloca+0x15c/0x1d0 [ 43.621668] seq_read+0x3dc/0x2260 [ 43.625199] ? __vfs_read+0xc9/0x9b0 [ 43.628912] ? vfs_read+0x36c/0x6c0 [ 43.632516] ? seq_open+0x360/0x360 [ 43.636125] __vfs_read+0x1a5/0x9b0 [ 43.639748] vfs_read+0x36c/0x6c0 [ 43.643194] SYSC_pread64+0x275/0x310 [ 43.646989] SyS_pread64+0x65/0x90 [ 43.650523] do_syscall_64+0x309/0x430 [ 43.654393] ? SYSC_write+0x360/0x360 [ 43.658189] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.663360] RIP: 0033:0x440089 [ 43.666526] RSP: 002b:00007ffd11026098 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 43.674223] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 43.681481] RDX: 000000000000fdb4 RSI: 00000000200003c0 RDI: 0000000000000003 [ 43.688739] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 43.696084] R10: 0000000000000063 R11: 0000000000000213 R12: 0000000000401910 [ 43.703347] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 43.710605] [ 43.712228] Uninit was stored to memory at: [ 43.716557] kmsan_internal_chain_origin+0x12b/0x210 [ 43.721654] __msan_chain_origin+0x69/0xc0 [ 43.725894] __save_stack_trace+0x829/0xb00 [ 43.730203] save_stack_trace_tsk+0x258/0x2f0 [ 43.734679] proc_pid_stack+0x26a/0x470 [ 43.738630] proc_single_show+0x1af/0x300 [ 43.742767] traverse+0x3c4/0xe60 [ 43.746210] seq_read+0x3dc/0x2260 [ 43.749743] __vfs_read+0x1a5/0x9b0 [ 43.753351] vfs_read+0x36c/0x6c0 [ 43.756792] SYSC_pread64+0x275/0x310 [ 43.760581] SyS_pread64+0x65/0x90 [ 43.764112] do_syscall_64+0x309/0x430 [ 43.768002] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.773188] Uninit was stored to memory at: [ 43.777492] kmsan_internal_chain_origin+0x12b/0x210 [ 43.782574] __msan_chain_origin+0x69/0xc0 [ 43.786793] update_stack_state+0x959/0xa40 [ 43.791105] unwind_next_frame+0x618/0xe50 [ 43.795321] __save_stack_trace+0x734/0xb00 [ 43.799625] save_stack_trace_tsk+0x258/0x2f0 [ 43.804108] proc_pid_stack+0x26a/0x470 [ 43.808091] proc_single_show+0x1af/0x300 [ 43.812229] traverse+0x3c4/0xe60 [ 43.815667] seq_read+0x3dc/0x2260 [ 43.819189] __vfs_read+0x1a5/0x9b0 [ 43.822796] vfs_read+0x36c/0x6c0 [ 43.826238] SYSC_pread64+0x275/0x310 [ 43.830026] SyS_pread64+0x65/0x90 [ 43.833554] do_syscall_64+0x309/0x430 [ 43.837423] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.842589] Local variable description: ----this@link_path_walk [ 43.848626] Variable was created at: [ 43.852322] link_path_walk+0x5e/0x2140 [ 43.856276] path_openat+0x52c/0x6610 [ 43.860055] ================================================================== [ 43.867400] Disabling lock debugging due to kernel taint [ 43.872828] Kernel panic - not syncing: panic_on_warn set ... [ 43.872828] [ 43.880173] CPU: 1 PID: 4503 Comm: syz-executor751 Tainted: G B 4.16.0+ #87 [ 43.888476] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.897808] Call Trace: [ 43.900393] dump_stack+0x185/0x1d0 [ 43.904002] panic+0x39d/0x940 [ 43.907206] ? pointer+0x11e5/0x1410 [ 43.910900] kmsan_report+0x238/0x240 [ 43.914683] __msan_warning_32+0x6c/0xb0 [ 43.918739] ? proc_pid_stack+0x251/0x470 [ 43.923298] pointer+0x11e5/0x1410 [ 43.926823] ? proc_pid_stack+0x26a/0x470 [ 43.930952] vsnprintf+0xa2d/0x33c0 [ 43.934561] seq_printf+0x29f/0x420 [ 43.938178] ? proc_pid_stack+0x26a/0x470 [ 43.942307] ? proc_pid_stack+0x26a/0x470 [ 43.946435] ? proc_pid_stack+0x26a/0x470 [ 43.950562] proc_pid_stack+0x326/0x470 [ 43.954518] proc_single_show+0x1af/0x300 [ 43.958658] ? proc_pid_wchan+0x250/0x250 [ 43.962808] ? proc_single_open+0x90/0x90 [ 43.966934] traverse+0x3c4/0xe60 [ 43.970373] ? __msan_poison_alloca+0x15c/0x1d0 [ 43.975035] seq_read+0x3dc/0x2260 [ 43.978574] ? __vfs_read+0xc9/0x9b0 [ 43.982271] ? vfs_read+0x36c/0x6c0 [ 43.985877] ? seq_open+0x360/0x360 [ 43.989507] __vfs_read+0x1a5/0x9b0 [ 43.993145] vfs_read+0x36c/0x6c0 [ 43.996608] SYSC_pread64+0x275/0x310 [ 44.000393] SyS_pread64+0x65/0x90 [ 44.003914] do_syscall_64+0x309/0x430 [ 44.007798] ? SYSC_write+0x360/0x360 [ 44.011582] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.016757] RIP: 0033:0x440089 [ 44.019927] RSP: 002b:00007ffd11026098 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 44.027615] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 44.034863] RDX: 000000000000fdb4 RSI: 00000000200003c0 RDI: 0000000000000003 [ 44.042115] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 44.049364] R10: 0000000000000063 R11: 0000000000000213 R12: 0000000000401910 [ 44.056615] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 44.064358] Dumping ftrace buffer: [ 44.067891] (ftrace buffer empty) [ 44.071579] Kernel Offset: disabled [ 44.075191] Rebooting in 86400 seconds..