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 '10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 52.438549] ================================================================== [ 52.445949] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 52.451813] CPU: 1 PID: 4506 Comm: syzkaller896942 Not tainted 4.16.0+ #85 [ 52.458798] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.468126] Call Trace: [ 52.470695] dump_stack+0x185/0x1d0 [ 52.474300] ? pointer+0x11e5/0x1410 [ 52.478001] kmsan_report+0x142/0x240 [ 52.481784] __msan_warning_32+0x6c/0xb0 [ 52.485828] ? futex_wait_queue_me+0x401/0x710 [ 52.490384] pointer+0x11e5/0x1410 [ 52.493903] ? futex_wait_queue_me+0x476/0x710 [ 52.498471] vsnprintf+0xa2d/0x33c0 [ 52.502077] seq_printf+0x29f/0x420 [ 52.505689] ? futex_wait_queue_me+0x476/0x710 [ 52.510247] ? futex_wait_queue_me+0x476/0x710 [ 52.514806] ? futex_wait_queue_me+0x476/0x710 [ 52.519373] proc_pid_stack+0x326/0x470 [ 52.523324] proc_single_show+0x1af/0x300 [ 52.527446] ? proc_pid_wchan+0x250/0x250 [ 52.531568] ? proc_single_open+0x90/0x90 [ 52.535688] seq_read+0xc7d/0x2260 [ 52.539211] ? __fsnotify_parent+0x75/0x560 [ 52.543515] ? seq_open+0x360/0x360 [ 52.547119] __vfs_read+0x1a5/0x9b0 [ 52.550725] vfs_read+0x36c/0x6c0 [ 52.554160] SYSC_read+0x172/0x360 [ 52.557678] SyS_read+0x55/0x80 [ 52.560933] do_syscall_64+0x309/0x430 [ 52.564795] ? vfs_write+0x8d0/0x8d0 [ 52.568485] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.573659] RIP: 0033:0x445519 [ 52.576823] RSP: 002b:00007fca9989bd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 52.584505] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 52.591751] RDX: 00000000000000d6 RSI: 0000000020000100 RDI: 0000000000000003 [ 52.598995] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 52.606240] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007fca9989bd20 [ 52.613483] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 52.620730] [ 52.622329] Uninit was stored to memory at: [ 52.626631] kmsan_internal_chain_origin+0x12b/0x210 [ 52.631722] __msan_chain_origin+0x69/0xc0 [ 52.635934] __save_stack_trace+0x829/0xb00 [ 52.640228] save_stack_trace_tsk+0x258/0x2f0 [ 52.644703] proc_pid_stack+0x26a/0x470 [ 52.648649] proc_single_show+0x1af/0x300 [ 52.652776] seq_read+0xc7d/0x2260 [ 52.656290] __vfs_read+0x1a5/0x9b0 [ 52.659892] vfs_read+0x36c/0x6c0 [ 52.663319] SYSC_read+0x172/0x360 [ 52.666834] SyS_read+0x55/0x80 [ 52.670086] do_syscall_64+0x309/0x430 [ 52.673948] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.679107] Uninit was stored to memory at: [ 52.683401] kmsan_internal_chain_origin+0x12b/0x210 [ 52.688476] __msan_chain_origin+0x69/0xc0 [ 52.692686] update_stack_state+0x959/0xa40 [ 52.696993] unwind_next_frame+0x618/0xe50 [ 52.701292] __save_stack_trace+0x734/0xb00 [ 52.705591] save_stack_trace_tsk+0x258/0x2f0 [ 52.710066] proc_pid_stack+0x26a/0x470 [ 52.714014] proc_single_show+0x1af/0x300 [ 52.718134] seq_read+0xc7d/0x2260 [ 52.721659] __vfs_read+0x1a5/0x9b0 [ 52.725259] vfs_read+0x36c/0x6c0 [ 52.728685] SYSC_read+0x172/0x360 [ 52.732198] SyS_read+0x55/0x80 [ 52.735451] do_syscall_64+0x309/0x430 [ 52.739313] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.744480] Local variable description: ----flags.i.i.i@rcu_all_qs [ 52.750765] Variable was created at: [ 52.754453] rcu_all_qs+0x32/0x1f0 [ 52.757967] _cond_resched+0x3c/0xd0 [ 52.761649] ================================================================== [ 52.768977] Disabling lock debugging due to kernel taint [ 52.774398] Kernel panic - not syncing: panic_on_warn set ... [ 52.774398] [ 52.781741] CPU: 1 PID: 4506 Comm: syzkaller896942 Tainted: G B 4.16.0+ #85 [ 52.790025] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.799350] Call Trace: [ 52.801914] dump_stack+0x185/0x1d0 [ 52.805526] panic+0x39d/0x940 [ 52.808709] ? pointer+0x11e5/0x1410 [ 52.812398] kmsan_report+0x238/0x240 [ 52.816174] __msan_warning_32+0x6c/0xb0 [ 52.820211] ? futex_wait_queue_me+0x401/0x710 [ 52.824763] pointer+0x11e5/0x1410 [ 52.828282] ? futex_wait_queue_me+0x476/0x710 [ 52.832838] vsnprintf+0xa2d/0x33c0 [ 52.836444] seq_printf+0x29f/0x420 [ 52.840055] ? futex_wait_queue_me+0x476/0x710 [ 52.844615] ? futex_wait_queue_me+0x476/0x710 [ 52.849171] ? futex_wait_queue_me+0x476/0x710 [ 52.853729] proc_pid_stack+0x326/0x470 [ 52.857677] proc_single_show+0x1af/0x300 [ 52.861799] ? proc_pid_wchan+0x250/0x250 [ 52.865923] ? proc_single_open+0x90/0x90 [ 52.870041] seq_read+0xc7d/0x2260 [ 52.873564] ? __fsnotify_parent+0x75/0x560 [ 52.877863] ? seq_open+0x360/0x360 [ 52.881466] __vfs_read+0x1a5/0x9b0 [ 52.885070] vfs_read+0x36c/0x6c0 [ 52.888505] SYSC_read+0x172/0x360 [ 52.892022] SyS_read+0x55/0x80 [ 52.895277] do_syscall_64+0x309/0x430 [ 52.899139] ? vfs_write+0x8d0/0x8d0 [ 52.902827] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 52.907991] RIP: 0033:0x445519 [ 52.911160] RSP: 002b:00007fca9989bd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 52.919016] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 52.926259] RDX: 00000000000000d6 RSI: 0000000020000100 RDI: 0000000000000003 [ 52.933504] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 52.940748] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007fca9989bd20 [ 52.947992] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 52.955591] Dumping ftrace buffer: [ 52.959114] (ftrace buffer empty) [ 52.962797] Kernel Offset: disabled [ 52.966396] Rebooting in 86400 seconds..