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 '10.128.10.1' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.774357] ================================================================== [ 60.781769] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 60.787639] CPU: 0 PID: 4525 Comm: syz-executor013 Not tainted 4.16.0+ #87 [ 60.794626] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.803961] Call Trace: [ 60.806547] dump_stack+0x185/0x1d0 [ 60.810166] ? pointer+0x11e5/0x1410 [ 60.813862] kmsan_report+0x142/0x240 [ 60.817643] __msan_warning_32+0x6c/0xb0 [ 60.821692] ? proc_pid_stack+0x251/0x470 [ 60.825821] pointer+0x11e5/0x1410 [ 60.829476] ? proc_pid_stack+0x26a/0x470 [ 60.833620] vsnprintf+0xa2d/0x33c0 [ 60.837238] seq_printf+0x29f/0x420 [ 60.840868] ? proc_pid_stack+0x26a/0x470 [ 60.845366] ? proc_pid_stack+0x26a/0x470 [ 60.850369] ? proc_pid_stack+0x26a/0x470 [ 60.854592] proc_pid_stack+0x326/0x470 [ 60.858554] proc_single_show+0x1af/0x300 [ 60.862695] ? proc_pid_wchan+0x250/0x250 [ 60.866828] ? proc_single_open+0x90/0x90 [ 60.870959] traverse+0x3c4/0xe60 [ 60.874400] ? __msan_poison_alloca+0x15c/0x1d0 [ 60.879060] seq_read+0x3dc/0x2260 [ 60.882586] ? __vfs_read+0xc9/0x9b0 [ 60.886277] ? vfs_read+0x36c/0x6c0 [ 60.889878] ? seq_open+0x360/0x360 [ 60.893489] __vfs_read+0x1a5/0x9b0 [ 60.897102] vfs_read+0x36c/0x6c0 [ 60.900543] SYSC_pread64+0x275/0x310 [ 60.904338] SyS_pread64+0x65/0x90 [ 60.907866] do_syscall_64+0x309/0x430 [ 60.911745] ? SYSC_write+0x360/0x360 [ 60.915536] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 60.920706] RIP: 0033:0x440089 [ 60.923873] RSP: 002b:00007ffe8d508688 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 60.931567] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 60.938818] RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003 [ 60.946071] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 60.953321] R10: 000000000001ffff R11: 0000000000000213 R12: 0000000000401910 [ 60.960575] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 60.967833] [ 60.969446] Uninit was stored to memory at: [ 60.974103] kmsan_internal_chain_origin+0x12b/0x210 [ 60.979273] __msan_chain_origin+0x69/0xc0 [ 60.983488] __save_stack_trace+0x829/0xb00 [ 60.987790] save_stack_trace_tsk+0x258/0x2f0 [ 60.992276] proc_pid_stack+0x26a/0x470 [ 60.996226] proc_single_show+0x1af/0x300 [ 61.000350] traverse+0x3c4/0xe60 [ 61.003779] seq_read+0x3dc/0x2260 [ 61.007302] __vfs_read+0x1a5/0x9b0 [ 61.010918] vfs_read+0x36c/0x6c0 [ 61.014348] SYSC_pread64+0x275/0x310 [ 61.018129] SyS_pread64+0x65/0x90 [ 61.021650] do_syscall_64+0x309/0x430 [ 61.025542] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.030719] Uninit was stored to memory at: [ 61.035025] kmsan_internal_chain_origin+0x12b/0x210 [ 61.040110] __msan_chain_origin+0x69/0xc0 [ 61.044334] update_stack_state+0x959/0xa40 [ 61.048634] unwind_next_frame+0x618/0xe50 [ 61.052850] __save_stack_trace+0x734/0xb00 [ 61.057155] save_stack_trace_tsk+0x258/0x2f0 [ 61.061630] proc_pid_stack+0x26a/0x470 [ 61.065583] proc_single_show+0x1af/0x300 [ 61.069709] traverse+0x3c4/0xe60 [ 61.073140] seq_read+0x3dc/0x2260 [ 61.076660] __vfs_read+0x1a5/0x9b0 [ 61.080264] vfs_read+0x36c/0x6c0 [ 61.083695] SYSC_pread64+0x275/0x310 [ 61.087476] SyS_pread64+0x65/0x90 [ 61.091010] do_syscall_64+0x309/0x430 [ 61.094880] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.100049] Local variable description: ----this@link_path_walk [ 61.106080] Variable was created at: [ 61.109784] link_path_walk+0x5e/0x2140 [ 61.113740] path_openat+0x52c/0x6610 [ 61.117513] ================================================================== [ 61.124849] Disabling lock debugging due to kernel taint [ 61.130889] Kernel panic - not syncing: panic_on_warn set ... [ 61.130889] [ 61.138248] CPU: 0 PID: 4525 Comm: syz-executor013 Tainted: G B 4.16.0+ #87 [ 61.146806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.156143] Call Trace: [ 61.158728] dump_stack+0x185/0x1d0 [ 61.162342] panic+0x39d/0x940 [ 61.165524] ? pointer+0x11e5/0x1410 [ 61.169224] kmsan_report+0x238/0x240 [ 61.173008] __msan_warning_32+0x6c/0xb0 [ 61.177148] ? proc_pid_stack+0x251/0x470 [ 61.181279] pointer+0x11e5/0x1410 [ 61.184810] ? proc_pid_stack+0x26a/0x470 [ 61.188951] vsnprintf+0xa2d/0x33c0 [ 61.192823] seq_printf+0x29f/0x420 [ 61.196461] ? proc_pid_stack+0x26a/0x470 [ 61.200608] ? proc_pid_stack+0x26a/0x470 [ 61.204750] ? proc_pid_stack+0x26a/0x470 [ 61.208905] proc_pid_stack+0x326/0x470 [ 61.213420] proc_single_show+0x1af/0x300 [ 61.217560] ? proc_pid_wchan+0x250/0x250 [ 61.221780] ? proc_single_open+0x90/0x90 [ 61.225918] traverse+0x3c4/0xe60 [ 61.229380] ? __msan_poison_alloca+0x15c/0x1d0 [ 61.234055] seq_read+0x3dc/0x2260 [ 61.237601] ? __vfs_read+0xc9/0x9b0 [ 61.241332] ? vfs_read+0x36c/0x6c0 [ 61.244944] ? seq_open+0x360/0x360 [ 61.248550] __vfs_read+0x1a5/0x9b0 [ 61.252164] vfs_read+0x36c/0x6c0 [ 61.255600] SYSC_pread64+0x275/0x310 [ 61.259382] SyS_pread64+0x65/0x90 [ 61.262991] do_syscall_64+0x309/0x430 [ 61.266861] ? SYSC_write+0x360/0x360 [ 61.270648] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 61.275823] RIP: 0033:0x440089 [ 61.278991] RSP: 002b:00007ffe8d508688 EFLAGS: 00000213 ORIG_RAX: 0000000000000011 [ 61.286695] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440089 [ 61.293949] RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003 [ 61.301201] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 61.308454] R10: 000000000001ffff R11: 0000000000000213 R12: 0000000000401910 [ 61.315707] R13: 00000000004019a0 R14: 0000000000000000 R15: 0000000000000000 [ 61.323779] Dumping ftrace buffer: [ 61.327307] (ftrace buffer empty) [ 61.330997] Kernel Offset: disabled [ 61.334604] Rebooting in 86400 seconds..