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 '10.128.10.18' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.257851] ================================================================== [ 44.265262] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 44.271129] CPU: 0 PID: 4508 Comm: syzkaller707384 Not tainted 4.16.0+ #85 [ 44.278122] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.287456] Call Trace: [ 44.290038] dump_stack+0x185/0x1d0 [ 44.293644] ? pointer+0x11e5/0x1410 [ 44.297345] kmsan_report+0x142/0x240 [ 44.301126] __msan_warning_32+0x6c/0xb0 [ 44.305168] ? proc_pid_stack+0x1e1/0x470 [ 44.309294] pointer+0x11e5/0x1410 [ 44.312823] ? proc_pid_stack+0x26a/0x470 [ 44.316949] vsnprintf+0xa2d/0x33c0 [ 44.320559] seq_printf+0x29f/0x420 [ 44.324174] ? save_stack_trace_tsk+0x26a/0x2f0 [ 44.328832] ? proc_pid_stack+0x26a/0x470 [ 44.332963] ? proc_pid_stack+0x26a/0x470 [ 44.337090] ? proc_pid_stack+0x26a/0x470 [ 44.341226] proc_pid_stack+0x326/0x470 [ 44.345181] proc_single_show+0x1af/0x300 [ 44.349308] ? proc_pid_wchan+0x250/0x250 [ 44.353435] ? proc_single_open+0x90/0x90 [ 44.357568] seq_read+0xc7d/0x2260 [ 44.361097] do_iter_read+0x880/0xd70 [ 44.364881] ? seq_open+0x360/0x360 [ 44.368572] do_readv+0x295/0x5f0 [ 44.372013] ? syscall_return_slowpath+0xe9/0x700 [ 44.376859] SYSC_readv+0x9b/0xb0 [ 44.380299] SyS_readv+0x56/0x80 [ 44.383643] do_syscall_64+0x309/0x430 [ 44.387516] ? vfs_readv+0x260/0x260 [ 44.391214] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.396383] RIP: 0033:0x4400a9 [ 44.399551] RSP: 002b:00007fff078faa18 EFLAGS: 00000213 ORIG_RAX: 0000000000000013 [ 44.407235] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 44.414485] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 44.421735] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 44.428982] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 44.436230] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 44.443488] [ 44.445101] Uninit was stored to memory at: [ 44.449404] kmsan_internal_chain_origin+0x12b/0x210 [ 44.454483] __msan_chain_origin+0x69/0xc0 [ 44.458698] __save_stack_trace+0x829/0xb00 [ 44.462996] save_stack_trace_tsk+0x258/0x2f0 [ 44.467475] proc_pid_stack+0x26a/0x470 [ 44.471439] proc_single_show+0x1af/0x300 [ 44.475563] seq_read+0xc7d/0x2260 [ 44.479083] do_iter_read+0x880/0xd70 [ 44.482859] do_readv+0x295/0x5f0 [ 44.486290] SYSC_readv+0x9b/0xb0 [ 44.489726] SyS_readv+0x56/0x80 [ 44.493069] do_syscall_64+0x309/0x430 [ 44.496950] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.502113] Uninit was stored to memory at: [ 44.506412] kmsan_internal_chain_origin+0x12b/0x210 [ 44.511490] __msan_chain_origin+0x69/0xc0 [ 44.515702] update_stack_state+0x959/0xa40 [ 44.520001] unwind_next_frame+0x618/0xe50 [ 44.524223] __save_stack_trace+0x734/0xb00 [ 44.528523] save_stack_trace_tsk+0x258/0x2f0 [ 44.532995] proc_pid_stack+0x26a/0x470 [ 44.536946] proc_single_show+0x1af/0x300 [ 44.541081] seq_read+0xc7d/0x2260 [ 44.544601] do_iter_read+0x880/0xd70 [ 44.548378] do_readv+0x295/0x5f0 [ 44.551829] SYSC_readv+0x9b/0xb0 [ 44.555261] SyS_readv+0x56/0x80 [ 44.558605] do_syscall_64+0x309/0x430 [ 44.562469] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.567640] Local variable description: ----flags.i.i.i@rcu_all_qs [ 44.573928] Variable was created at: [ 44.577620] rcu_all_qs+0x32/0x1f0 [ 44.581138] _cond_resched+0x3c/0xd0 [ 44.584846] ================================================================== [ 44.592177] Disabling lock debugging due to kernel taint [ 44.597602] Kernel panic - not syncing: panic_on_warn set ... [ 44.597602] [ 44.604944] CPU: 0 PID: 4508 Comm: syzkaller707384 Tainted: G B 4.16.0+ #85 [ 44.613237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.622568] Call Trace: [ 44.625140] dump_stack+0x185/0x1d0 [ 44.628746] panic+0x39d/0x940 [ 44.631926] ? pointer+0x11e5/0x1410 [ 44.635615] kmsan_report+0x238/0x240 [ 44.639394] __msan_warning_32+0x6c/0xb0 [ 44.643433] ? proc_pid_stack+0x1e1/0x470 [ 44.647554] pointer+0x11e5/0x1410 [ 44.651073] ? proc_pid_stack+0x26a/0x470 [ 44.655196] vsnprintf+0xa2d/0x33c0 [ 44.658801] seq_printf+0x29f/0x420 [ 44.662414] ? save_stack_trace_tsk+0x26a/0x2f0 [ 44.667058] ? proc_pid_stack+0x26a/0x470 [ 44.671183] ? proc_pid_stack+0x26a/0x470 [ 44.675307] ? proc_pid_stack+0x26a/0x470 [ 44.679430] proc_pid_stack+0x326/0x470 [ 44.683384] proc_single_show+0x1af/0x300 [ 44.687508] ? proc_pid_wchan+0x250/0x250 [ 44.691632] ? proc_single_open+0x90/0x90 [ 44.695755] seq_read+0xc7d/0x2260 [ 44.699280] do_iter_read+0x880/0xd70 [ 44.703059] ? seq_open+0x360/0x360 [ 44.706661] do_readv+0x295/0x5f0 [ 44.710094] ? syscall_return_slowpath+0xe9/0x700 [ 44.714914] SYSC_readv+0x9b/0xb0 [ 44.718346] SyS_readv+0x56/0x80 [ 44.721689] do_syscall_64+0x309/0x430 [ 44.725556] ? vfs_readv+0x260/0x260 [ 44.729248] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.734425] RIP: 0033:0x4400a9 [ 44.737591] RSP: 002b:00007fff078faa18 EFLAGS: 00000213 ORIG_RAX: 0000000000000013 [ 44.745273] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004400a9 [ 44.752518] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000003 [ 44.759761] RBP: 00000000006ca018 R08: 0000000000000010 R09: 65732f636f72702f [ 44.767008] R10: 0000000000000000 R11: 0000000000000213 R12: 0000000000401930 [ 44.774262] R13: 00000000004019c0 R14: 0000000000000000 R15: 0000000000000000 [ 44.782001] Dumping ftrace buffer: [ 44.785526] (ftrace buffer empty) [ 44.789209] Kernel Offset: disabled [ 44.792810] Rebooting in 86400 seconds..