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 '10.128.0.60' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.345511] ================================================================== [ 45.352905] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 45.358781] CPU: 0 PID: 4496 Comm: syz-executor206 Not tainted 4.16.0+ #87 [ 45.365782] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.375113] Call Trace: [ 45.377688] dump_stack+0x185/0x1d0 [ 45.381294] ? pointer+0x11e5/0x1410 [ 45.384998] kmsan_report+0x142/0x240 [ 45.388785] __msan_warning_32+0x6c/0xb0 [ 45.392831] ? futex_wait_queue_me+0x401/0x710 [ 45.397400] pointer+0x11e5/0x1410 [ 45.400921] ? futex_wait_queue_me+0x476/0x710 [ 45.405485] vsnprintf+0xa2d/0x33c0 [ 45.409094] ? drain_slots_cache_cpu+0x414/0x5b0 [ 45.413829] seq_printf+0x29f/0x420 [ 45.417447] ? save_stack_trace_tsk+0x26a/0x2f0 [ 45.422097] ? futex_wait_queue_me+0x476/0x710 [ 45.426750] ? futex_wait_queue_me+0x476/0x710 [ 45.431323] ? futex_wait_queue_me+0x476/0x710 [ 45.435885] proc_pid_stack+0x326/0x470 [ 45.439842] proc_single_show+0x1af/0x300 [ 45.443968] ? proc_pid_wchan+0x250/0x250 [ 45.448106] ? proc_single_open+0x90/0x90 [ 45.452247] seq_read+0xc7d/0x2260 [ 45.455770] ? __vfs_read+0xc9/0x9b0 [ 45.459461] ? seq_open+0x360/0x360 [ 45.463154] __vfs_read+0x1a5/0x9b0 [ 45.466772] vfs_read+0x36c/0x6c0 [ 45.470207] SYSC_pread64+0x275/0x310 [ 45.473988] SyS_pread64+0x65/0x90 [ 45.477509] do_syscall_64+0x309/0x430 [ 45.481380] ? SYSC_write+0x360/0x360 [ 45.485161] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.490332] RIP: 0033:0x445519 [ 45.493508] RSP: 002b:00007f31a96ccd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 45.501195] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 45.508529] RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003 [ 45.515777] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 45.523033] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f31a96ccd20 [ 45.530288] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 45.537543] [ 45.539148] Uninit was stored to memory at: [ 45.543450] kmsan_internal_chain_origin+0x12b/0x210 [ 45.548542] __msan_chain_origin+0x69/0xc0 [ 45.552761] __save_stack_trace+0x829/0xb00 [ 45.557063] save_stack_trace_tsk+0x258/0x2f0 [ 45.561536] proc_pid_stack+0x26a/0x470 [ 45.565488] proc_single_show+0x1af/0x300 [ 45.569613] seq_read+0xc7d/0x2260 [ 45.573564] __vfs_read+0x1a5/0x9b0 [ 45.577170] vfs_read+0x36c/0x6c0 [ 45.580601] SYSC_pread64+0x275/0x310 [ 45.584382] SyS_pread64+0x65/0x90 [ 45.587917] do_syscall_64+0x309/0x430 [ 45.591793] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.596955] Uninit was stored to memory at: [ 45.601257] kmsan_internal_chain_origin+0x12b/0x210 [ 45.606339] __msan_chain_origin+0x69/0xc0 [ 45.610554] update_stack_state+0x959/0xa40 [ 45.614854] unwind_next_frame+0x618/0xe50 [ 45.619070] __save_stack_trace+0x734/0xb00 [ 45.623368] save_stack_trace_tsk+0x258/0x2f0 [ 45.627851] proc_pid_stack+0x26a/0x470 [ 45.631802] proc_single_show+0x1af/0x300 [ 45.635925] seq_read+0xc7d/0x2260 [ 45.639447] __vfs_read+0x1a5/0x9b0 [ 45.643056] vfs_read+0x36c/0x6c0 [ 45.646491] SYSC_pread64+0x275/0x310 [ 45.650270] SyS_pread64+0x65/0x90 [ 45.653792] do_syscall_64+0x309/0x430 [ 45.657762] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.662927] Local variable description: ----flags.i.i.i@rcu_all_qs [ 45.669220] Variable was created at: [ 45.672917] rcu_all_qs+0x32/0x1f0 [ 45.676449] _cond_resched+0x3c/0xd0 [ 45.680136] ================================================================== [ 45.687478] Disabling lock debugging due to kernel taint [ 45.692904] Kernel panic - not syncing: panic_on_warn set ... [ 45.692904] [ 45.700247] CPU: 0 PID: 4496 Comm: syz-executor206 Tainted: G B 4.16.0+ #87 [ 45.708537] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.717866] Call Trace: [ 45.720446] dump_stack+0x185/0x1d0 [ 45.724066] panic+0x39d/0x940 [ 45.727263] ? pointer+0x11e5/0x1410 [ 45.730956] kmsan_report+0x238/0x240 [ 45.734736] __msan_warning_32+0x6c/0xb0 [ 45.738781] ? futex_wait_queue_me+0x401/0x710 [ 45.743345] pointer+0x11e5/0x1410 [ 45.746869] ? futex_wait_queue_me+0x476/0x710 [ 45.751439] vsnprintf+0xa2d/0x33c0 [ 45.755072] ? drain_slots_cache_cpu+0x414/0x5b0 [ 45.759817] seq_printf+0x29f/0x420 [ 45.763449] ? save_stack_trace_tsk+0x26a/0x2f0 [ 45.768105] ? futex_wait_queue_me+0x476/0x710 [ 45.772669] ? futex_wait_queue_me+0x476/0x710 [ 45.777231] ? futex_wait_queue_me+0x476/0x710 [ 45.781805] proc_pid_stack+0x326/0x470 [ 45.785761] proc_single_show+0x1af/0x300 [ 45.789888] ? proc_pid_wchan+0x250/0x250 [ 45.794020] ? proc_single_open+0x90/0x90 [ 45.798156] seq_read+0xc7d/0x2260 [ 45.801681] ? __vfs_read+0xc9/0x9b0 [ 45.805372] ? seq_open+0x360/0x360 [ 45.808978] __vfs_read+0x1a5/0x9b0 [ 45.812587] vfs_read+0x36c/0x6c0 [ 45.816047] SYSC_pread64+0x275/0x310 [ 45.819839] SyS_pread64+0x65/0x90 [ 45.823360] do_syscall_64+0x309/0x430 [ 45.827227] ? SYSC_write+0x360/0x360 [ 45.831018] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 45.836194] RIP: 0033:0x445519 [ 45.839359] RSP: 002b:00007f31a96ccd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 [ 45.847052] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445519 [ 45.854324] RDX: 0000000000000008 RSI: 0000000020000040 RDI: 0000000000000003 [ 45.861586] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 45.868833] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f31a96ccd20 [ 45.876120] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 45.883846] Dumping ftrace buffer: [ 45.887371] (ftrace buffer empty) [ 45.891058] Kernel Offset: disabled [ 45.894662] Rebooting in 86400 seconds..