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 '10.128.10.21' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.944624] ================================================================== [ 42.952024] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 42.957893] CPU: 0 PID: 4502 Comm: syz-executor887 Not tainted 4.16.0+ #87 [ 42.964880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.974219] Call Trace: [ 42.976794] dump_stack+0x185/0x1d0 [ 42.980408] ? pointer+0x11e5/0x1410 [ 42.984108] kmsan_report+0x142/0x240 [ 42.987890] __msan_warning_32+0x6c/0xb0 [ 42.991932] ? futex_wait_queue_me+0x401/0x710 [ 42.996493] pointer+0x11e5/0x1410 [ 43.000038] ? futex_wait_queue_me+0x476/0x710 [ 43.004610] vsnprintf+0xa2d/0x33c0 [ 43.008223] seq_printf+0x29f/0x420 [ 43.011842] ? futex_wait_queue_me+0x476/0x710 [ 43.016409] ? futex_wait_queue_me+0x476/0x710 [ 43.020976] ? futex_wait_queue_me+0x476/0x710 [ 43.025543] proc_pid_stack+0x326/0x470 [ 43.029513] proc_single_show+0x1af/0x300 [ 43.033653] ? proc_pid_wchan+0x250/0x250 [ 43.037781] ? proc_single_open+0x90/0x90 [ 43.041908] seq_read+0xc7d/0x2260 [ 43.045432] ? __fsnotify_parent+0x75/0x560 [ 43.049743] ? seq_open+0x360/0x360 [ 43.053358] __vfs_read+0x1a5/0x9b0 [ 43.056972] vfs_read+0x36c/0x6c0 [ 43.060407] SYSC_read+0x172/0x360 [ 43.063930] SyS_read+0x55/0x80 [ 43.067190] do_syscall_64+0x309/0x430 [ 43.071071] ? vfs_write+0x8d0/0x8d0 [ 43.074780] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.079969] RIP: 0033:0x445569 [ 43.083134] RSP: 002b:00007f54c3512d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 43.090828] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 43.098078] RDX: 000000000000005d RSI: 0000000020010f89 RDI: 0000000000000003 [ 43.105329] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.112575] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f54c3512d20 [ 43.119823] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 43.127082] [ 43.128709] Uninit was stored to memory at: [ 43.133021] kmsan_internal_chain_origin+0x12b/0x210 [ 43.138125] __msan_chain_origin+0x69/0xc0 [ 43.142344] __save_stack_trace+0x829/0xb00 [ 43.146645] save_stack_trace_tsk+0x258/0x2f0 [ 43.151130] proc_pid_stack+0x26a/0x470 [ 43.155093] proc_single_show+0x1af/0x300 [ 43.159222] seq_read+0xc7d/0x2260 [ 43.162742] __vfs_read+0x1a5/0x9b0 [ 43.166344] vfs_read+0x36c/0x6c0 [ 43.169773] SYSC_read+0x172/0x360 [ 43.173298] SyS_read+0x55/0x80 [ 43.176557] do_syscall_64+0x309/0x430 [ 43.180424] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.185584] Uninit was stored to memory at: [ 43.189883] kmsan_internal_chain_origin+0x12b/0x210 [ 43.194973] __msan_chain_origin+0x69/0xc0 [ 43.199194] update_stack_state+0x959/0xa40 [ 43.203492] unwind_next_frame+0x618/0xe50 [ 43.207706] __save_stack_trace+0x734/0xb00 [ 43.212021] save_stack_trace_tsk+0x258/0x2f0 [ 43.216504] proc_pid_stack+0x26a/0x470 [ 43.220458] proc_single_show+0x1af/0x300 [ 43.224588] seq_read+0xc7d/0x2260 [ 43.228110] __vfs_read+0x1a5/0x9b0 [ 43.231713] vfs_read+0x36c/0x6c0 [ 43.235150] SYSC_read+0x172/0x360 [ 43.238675] SyS_read+0x55/0x80 [ 43.241942] do_syscall_64+0x309/0x430 [ 43.245819] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.250990] Local variable description: ----flags.i.i.i@rcu_all_qs [ 43.257298] Variable was created at: [ 43.260995] rcu_all_qs+0x32/0x1f0 [ 43.264519] _cond_resched+0x3c/0xd0 [ 43.268218] ================================================================== [ 43.275554] Disabling lock debugging due to kernel taint [ 43.280982] Kernel panic - not syncing: panic_on_warn set ... [ 43.280982] [ 43.288414] CPU: 0 PID: 4502 Comm: syz-executor887 Tainted: G B 4.16.0+ #87 [ 43.296707] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.306048] Call Trace: [ 43.308622] dump_stack+0x185/0x1d0 [ 43.312233] panic+0x39d/0x940 [ 43.315416] ? pointer+0x11e5/0x1410 [ 43.319109] kmsan_report+0x238/0x240 [ 43.322902] __msan_warning_32+0x6c/0xb0 [ 43.326943] ? futex_wait_queue_me+0x401/0x710 [ 43.331506] pointer+0x11e5/0x1410 [ 43.335040] ? futex_wait_queue_me+0x476/0x710 [ 43.339618] vsnprintf+0xa2d/0x33c0 [ 43.343237] seq_printf+0x29f/0x420 [ 43.346859] ? futex_wait_queue_me+0x476/0x710 [ 43.351420] ? futex_wait_queue_me+0x476/0x710 [ 43.355986] ? futex_wait_queue_me+0x476/0x710 [ 43.360552] proc_pid_stack+0x326/0x470 [ 43.364518] proc_single_show+0x1af/0x300 [ 43.368646] ? proc_pid_wchan+0x250/0x250 [ 43.372774] ? proc_single_open+0x90/0x90 [ 43.376902] seq_read+0xc7d/0x2260 [ 43.380431] ? __fsnotify_parent+0x75/0x560 [ 43.384735] ? seq_open+0x360/0x360 [ 43.388628] __vfs_read+0x1a5/0x9b0 [ 43.392331] vfs_read+0x36c/0x6c0 [ 43.395768] SYSC_read+0x172/0x360 [ 43.399290] SyS_read+0x55/0x80 [ 43.402554] do_syscall_64+0x309/0x430 [ 43.406423] ? vfs_write+0x8d0/0x8d0 [ 43.410119] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.415293] RIP: 0033:0x445569 [ 43.418474] RSP: 002b:00007f54c3512d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 43.426160] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445569 [ 43.433411] RDX: 000000000000005d RSI: 0000000020010f89 RDI: 0000000000000003 [ 43.440661] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.447915] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f54c3512d20 [ 43.455162] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 43.462931] Dumping ftrace buffer: [ 43.466457] (ftrace buffer empty) [ 43.470141] Kernel Offset: disabled [ 43.473742] Rebooting in 86400 seconds..