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 '10.128.10.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.925606] ================================================================== [ 41.932995] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 41.938866] CPU: 1 PID: 4495 Comm: syz-executor416 Not tainted 4.16.0+ #87 [ 41.945857] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.955187] Call Trace: [ 41.957792] dump_stack+0x185/0x1d0 [ 41.961398] ? pointer+0x11e5/0x1410 [ 41.965097] kmsan_report+0x142/0x240 [ 41.968896] __msan_warning_32+0x6c/0xb0 [ 41.972937] ? do_preadv+0x331/0x580 [ 41.976631] pointer+0x11e5/0x1410 [ 41.980410] ? do_preadv+0x3a1/0x580 [ 41.984104] vsnprintf+0xa2d/0x33c0 [ 41.987730] ? ip_vs_tcpudp_debug_packet+0x984/0xf70 [ 41.993078] seq_printf+0x29f/0x420 [ 41.996705] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.001354] ? do_preadv+0x3a1/0x580 [ 42.005051] ? do_preadv+0x3a1/0x580 [ 42.008751] ? do_preadv+0x3a1/0x580 [ 42.012447] proc_pid_stack+0x326/0x470 [ 42.016409] proc_single_show+0x1af/0x300 [ 42.020535] ? proc_pid_wchan+0x250/0x250 [ 42.024679] ? proc_single_open+0x90/0x90 [ 42.028804] seq_read+0xc7d/0x2260 [ 42.032341] do_iter_read+0x880/0xd70 [ 42.036119] ? seq_open+0x360/0x360 [ 42.039729] do_preadv+0x3a1/0x580 [ 42.043253] ? syscall_return_slowpath+0xe9/0x700 [ 42.048075] SYSC_preadv+0xc6/0xe0 [ 42.051593] SyS_preadv+0x77/0xa0 [ 42.055032] do_syscall_64+0x309/0x430 [ 42.058914] ? SYSC_writev+0xb0/0xb0 [ 42.062609] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.067951] RIP: 0033:0x4400c9 [ 42.071128] RSP: 002b:00007ffc0f3bcb58 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 42.078816] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400c9 [ 42.086419] RDX: 0000000000000002 RSI: 0000000020002300 RDI: 0000000000000003 [ 42.093667] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.100917] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401950 [ 42.108164] R13: 00000000004019e0 R14: 0000000000000000 R15: 0000000000000000 [ 42.115411] [ 42.117019] Uninit was stored to memory at: [ 42.121328] kmsan_internal_chain_origin+0x12b/0x210 [ 42.126408] __msan_chain_origin+0x69/0xc0 [ 42.130627] __save_stack_trace+0x829/0xb00 [ 42.134929] save_stack_trace_tsk+0x258/0x2f0 [ 42.139404] proc_pid_stack+0x26a/0x470 [ 42.143355] proc_single_show+0x1af/0x300 [ 42.147478] seq_read+0xc7d/0x2260 [ 42.150997] do_iter_read+0x880/0xd70 [ 42.154784] do_preadv+0x3a1/0x580 [ 42.158304] SYSC_preadv+0xc6/0xe0 [ 42.161837] SyS_preadv+0x77/0xa0 [ 42.165267] do_syscall_64+0x309/0x430 [ 42.169135] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.174311] Uninit was stored to memory at: [ 42.178612] kmsan_internal_chain_origin+0x12b/0x210 [ 42.183689] __msan_chain_origin+0x69/0xc0 [ 42.187902] update_stack_state+0x959/0xa40 [ 42.192204] unwind_next_frame+0x618/0xe50 [ 42.196419] __save_stack_trace+0x734/0xb00 [ 42.200718] save_stack_trace_tsk+0x258/0x2f0 [ 42.205195] proc_pid_stack+0x26a/0x470 [ 42.209156] proc_single_show+0x1af/0x300 [ 42.213280] seq_read+0xc7d/0x2260 [ 42.216801] do_iter_read+0x880/0xd70 [ 42.220575] do_preadv+0x3a1/0x580 [ 42.224091] SYSC_preadv+0xc6/0xe0 [ 42.227609] SyS_preadv+0x77/0xa0 [ 42.231047] do_syscall_64+0x309/0x430 [ 42.234916] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.240087] Local variable description: ----nd@do_filp_open [ 42.245767] Variable was created at: [ 42.249455] do_filp_open+0x69/0x640 [ 42.253143] do_sys_open+0x624/0x960 [ 42.256828] ================================================================== [ 42.264157] Disabling lock debugging due to kernel taint [ 42.269585] Kernel panic - not syncing: panic_on_warn set ... [ 42.269585] [ 42.276937] CPU: 1 PID: 4495 Comm: syz-executor416 Tainted: G B 4.16.0+ #87 [ 42.285224] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.294554] Call Trace: [ 42.297126] dump_stack+0x185/0x1d0 [ 42.300735] panic+0x39d/0x940 [ 42.303918] ? pointer+0x11e5/0x1410 [ 42.307611] kmsan_report+0x238/0x240 [ 42.311390] __msan_warning_32+0x6c/0xb0 [ 42.315428] ? do_preadv+0x331/0x580 [ 42.319123] pointer+0x11e5/0x1410 [ 42.322648] ? do_preadv+0x3a1/0x580 [ 42.326347] vsnprintf+0xa2d/0x33c0 [ 42.329954] ? ip_vs_tcpudp_debug_packet+0x984/0xf70 [ 42.335043] seq_printf+0x29f/0x420 [ 42.338666] ? save_stack_trace_tsk+0x26a/0x2f0 [ 42.343311] ? do_preadv+0x3a1/0x580 [ 42.347002] ? do_preadv+0x3a1/0x580 [ 42.350700] ? do_preadv+0x3a1/0x580 [ 42.354391] proc_pid_stack+0x326/0x470 [ 42.358356] proc_single_show+0x1af/0x300 [ 42.362481] ? proc_pid_wchan+0x250/0x250 [ 42.366605] ? proc_single_open+0x90/0x90 [ 42.370737] seq_read+0xc7d/0x2260 [ 42.374259] do_iter_read+0x880/0xd70 [ 42.378052] ? seq_open+0x360/0x360 [ 42.381669] do_preadv+0x3a1/0x580 [ 42.385192] ? syscall_return_slowpath+0xe9/0x700 [ 42.390027] SYSC_preadv+0xc6/0xe0 [ 42.393566] SyS_preadv+0x77/0xa0 [ 42.396999] do_syscall_64+0x309/0x430 [ 42.400877] ? SYSC_writev+0xb0/0xb0 [ 42.404569] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 42.409736] RIP: 0033:0x4400c9 [ 42.412900] RSP: 002b:00007ffc0f3bcb58 EFLAGS: 00000213 ORIG_RAX: 0000000000000127 [ 42.420582] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400c9 [ 42.427829] RDX: 0000000000000002 RSI: 0000000020002300 RDI: 0000000000000003 [ 42.435077] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 42.442322] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401950 [ 42.449577] R13: 00000000004019e0 R14: 0000000000000000 R15: 0000000000000000 [ 42.457264] Dumping ftrace buffer: [ 42.460791] (ftrace buffer empty) [ 42.464477] Kernel Offset: disabled [ 42.468083] Rebooting in 86400 seconds..