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 '10.128.10.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.496533] ================================================================== [ 40.503914] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 40.509780] CPU: 1 PID: 4439 Comm: syz-executor146 Not tainted 4.16.0+ #87 [ 40.516771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.526102] Call Trace: [ 40.528672] dump_stack+0x185/0x1d0 [ 40.532279] ? pointer+0x11e5/0x1410 [ 40.535972] kmsan_report+0x142/0x240 [ 40.539753] __msan_warning_32+0x6c/0xb0 [ 40.543794] ? futex_wait_queue_me+0x401/0x710 [ 40.548351] pointer+0x11e5/0x1410 [ 40.551872] ? futex_wait_queue_me+0x476/0x710 [ 40.556433] vsnprintf+0xa2d/0x33c0 [ 40.560040] seq_printf+0x29f/0x420 [ 40.563654] ? futex_wait_queue_me+0x476/0x710 [ 40.568214] ? futex_wait_queue_me+0x476/0x710 [ 40.572772] ? futex_wait_queue_me+0x476/0x710 [ 40.577335] proc_pid_stack+0x326/0x470 [ 40.581291] proc_single_show+0x1af/0x300 [ 40.585420] ? proc_pid_wchan+0x250/0x250 [ 40.589547] ? proc_single_open+0x90/0x90 [ 40.593671] seq_read+0xc7d/0x2260 [ 40.597189] ? __fsnotify_parent+0x75/0x560 [ 40.601489] ? seq_open+0x360/0x360 [ 40.605093] __vfs_read+0x1a5/0x9b0 [ 40.608699] vfs_read+0x36c/0x6c0 [ 40.612136] SYSC_read+0x172/0x360 [ 40.615653] SyS_read+0x55/0x80 [ 40.618909] do_syscall_64+0x309/0x430 [ 40.622773] ? vfs_write+0x8d0/0x8d0 [ 40.626464] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.631627] RIP: 0033:0x445519 [ 40.634790] RSP: 002b:00007eff0f11cd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 40.642476] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 40.649726] RDX: 0000000000000008 RSI: 0000000020000b00 RDI: 0000000000000003 [ 40.656975] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.664229] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007eff0f11cd20 [ 40.671473] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 40.678721] [ 40.680323] Uninit was stored to memory at: [ 40.684624] kmsan_internal_chain_origin+0x12b/0x210 [ 40.689702] __msan_chain_origin+0x69/0xc0 [ 40.693918] __save_stack_trace+0x829/0xb00 [ 40.698217] save_stack_trace_tsk+0x258/0x2f0 [ 40.702690] proc_pid_stack+0x26a/0x470 [ 40.706642] proc_single_show+0x1af/0x300 [ 40.710765] seq_read+0xc7d/0x2260 [ 40.714285] __vfs_read+0x1a5/0x9b0 [ 40.717886] vfs_read+0x36c/0x6c0 [ 40.721327] SYSC_read+0x172/0x360 [ 40.724849] SyS_read+0x55/0x80 [ 40.728105] do_syscall_64+0x309/0x430 [ 40.731971] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.737138] Uninit was stored to memory at: [ 40.741439] kmsan_internal_chain_origin+0x12b/0x210 [ 40.746619] __msan_chain_origin+0x69/0xc0 [ 40.750833] update_stack_state+0x959/0xa40 [ 40.755139] unwind_next_frame+0x618/0xe50 [ 40.759358] __save_stack_trace+0x734/0xb00 [ 40.763673] save_stack_trace_tsk+0x258/0x2f0 [ 40.768147] proc_pid_stack+0x26a/0x470 [ 40.772096] proc_single_show+0x1af/0x300 [ 40.776229] seq_read+0xc7d/0x2260 [ 40.779747] __vfs_read+0x1a5/0x9b0 [ 40.783363] vfs_read+0x36c/0x6c0 [ 40.786790] SYSC_read+0x172/0x360 [ 40.790306] SyS_read+0x55/0x80 [ 40.793562] do_syscall_64+0x309/0x430 [ 40.797428] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.802590] Local variable description: ----flags.i.i.i@rcu_all_qs [ 40.808880] Variable was created at: [ 40.812574] rcu_all_qs+0x32/0x1f0 [ 40.816092] _cond_resched+0x3c/0xd0 [ 40.819792] ================================================================== [ 40.827128] Disabling lock debugging due to kernel taint [ 40.832554] Kernel panic - not syncing: panic_on_warn set ... [ 40.832554] [ 40.839895] CPU: 1 PID: 4439 Comm: syz-executor146 Tainted: G B 4.16.0+ #87 [ 40.848183] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.857511] Call Trace: [ 40.860079] dump_stack+0x185/0x1d0 [ 40.863685] panic+0x39d/0x940 [ 40.866863] ? pointer+0x11e5/0x1410 [ 40.870553] kmsan_report+0x238/0x240 [ 40.874333] __msan_warning_32+0x6c/0xb0 [ 40.878373] ? futex_wait_queue_me+0x401/0x710 [ 40.882936] pointer+0x11e5/0x1410 [ 40.886457] ? futex_wait_queue_me+0x476/0x710 [ 40.891023] vsnprintf+0xa2d/0x33c0 [ 40.894639] seq_printf+0x29f/0x420 [ 40.898251] ? futex_wait_queue_me+0x476/0x710 [ 40.902812] ? futex_wait_queue_me+0x476/0x710 [ 40.907370] ? futex_wait_queue_me+0x476/0x710 [ 40.911929] proc_pid_stack+0x326/0x470 [ 40.915881] proc_single_show+0x1af/0x300 [ 40.920006] ? proc_pid_wchan+0x250/0x250 [ 40.924131] ? proc_single_open+0x90/0x90 [ 40.928252] seq_read+0xc7d/0x2260 [ 40.931769] ? __fsnotify_parent+0x75/0x560 [ 40.936069] ? seq_open+0x360/0x360 [ 40.939674] __vfs_read+0x1a5/0x9b0 [ 40.943285] vfs_read+0x36c/0x6c0 [ 40.946717] SYSC_read+0x172/0x360 [ 40.950235] SyS_read+0x55/0x80 [ 40.953492] do_syscall_64+0x309/0x430 [ 40.957357] ? vfs_write+0x8d0/0x8d0 [ 40.961049] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 40.966225] RIP: 0033:0x445519 [ 40.969396] RSP: 002b:00007eff0f11cd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 40.977079] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 40.984323] RDX: 0000000000000008 RSI: 0000000020000b00 RDI: 0000000000000003 [ 40.991568] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 40.998812] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007eff0f11cd20 [ 41.006058] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 41.013804] Dumping ftrace buffer: [ 41.017323] (ftrace buffer empty) [ 41.021004] Kernel Offset: disabled [ 41.024604] Rebooting in 86400 seconds..