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 '10.128.10.14' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.173806] ================================================================== [ 41.181217] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 41.187086] CPU: 0 PID: 4518 Comm: syz-executor923 Not tainted 4.16.0+ #87 [ 41.194074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.203412] Call Trace: [ 41.205988] dump_stack+0x185/0x1d0 [ 41.209601] ? pointer+0x11e5/0x1410 [ 41.213302] kmsan_report+0x142/0x240 [ 41.217084] __msan_warning_32+0x6c/0xb0 [ 41.221127] ? futex_wait_queue_me+0x401/0x710 [ 41.225690] pointer+0x11e5/0x1410 [ 41.229214] ? futex_wait_queue_me+0x476/0x710 [ 41.233780] vsnprintf+0xa2d/0x33c0 [ 41.237414] seq_printf+0x29f/0x420 [ 41.241058] ? save_stack_trace_tsk+0x26a/0x2f0 [ 41.245748] ? futex_wait_queue_me+0x476/0x710 [ 41.250483] ? futex_wait_queue_me+0x476/0x710 [ 41.255081] ? futex_wait_queue_me+0x476/0x710 [ 41.259657] proc_pid_stack+0x326/0x470 [ 41.263624] proc_single_show+0x1af/0x300 [ 41.267762] ? proc_pid_wchan+0x250/0x250 [ 41.271894] ? proc_single_open+0x90/0x90 [ 41.276031] seq_read+0xc7d/0x2260 [ 41.279576] do_iter_read+0x880/0xd70 [ 41.283360] ? seq_open+0x360/0x360 [ 41.286971] do_readv+0x295/0x5f0 [ 41.290418] ? syscall_return_slowpath+0xe9/0x700 [ 41.295247] SYSC_readv+0x9b/0xb0 [ 41.298775] SyS_readv+0x56/0x80 [ 41.302125] do_syscall_64+0x309/0x430 [ 41.305996] ? vfs_readv+0x260/0x260 [ 41.309701] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.314870] RIP: 0033:0x445539 [ 41.318065] RSP: 002b:00007f8c54b1fd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 41.325761] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445539 [ 41.333107] RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000003 [ 41.340360] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 41.347615] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f8c54b1fd20 [ 41.354877] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 41.362141] [ 41.363748] Uninit was stored to memory at: [ 41.368067] kmsan_internal_chain_origin+0x12b/0x210 [ 41.373183] __msan_chain_origin+0x69/0xc0 [ 41.377409] __save_stack_trace+0x829/0xb00 [ 41.381725] save_stack_trace_tsk+0x258/0x2f0 [ 41.386204] proc_pid_stack+0x26a/0x470 [ 41.390167] proc_single_show+0x1af/0x300 [ 41.394294] seq_read+0xc7d/0x2260 [ 41.398076] do_iter_read+0x880/0xd70 [ 41.401863] do_readv+0x295/0x5f0 [ 41.405297] SYSC_readv+0x9b/0xb0 [ 41.408732] SyS_readv+0x56/0x80 [ 41.412086] do_syscall_64+0x309/0x430 [ 41.416192] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.421391] Uninit was stored to memory at: [ 41.425709] kmsan_internal_chain_origin+0x12b/0x210 [ 41.430792] __msan_chain_origin+0x69/0xc0 [ 41.435014] update_stack_state+0x959/0xa40 [ 41.439366] unwind_next_frame+0x618/0xe50 [ 41.444133] __save_stack_trace+0x734/0xb00 [ 41.448444] save_stack_trace_tsk+0x258/0x2f0 [ 41.452923] proc_pid_stack+0x26a/0x470 [ 41.456876] proc_single_show+0x1af/0x300 [ 41.461006] seq_read+0xc7d/0x2260 [ 41.464537] do_iter_read+0x880/0xd70 [ 41.468317] do_readv+0x295/0x5f0 [ 41.471769] SYSC_readv+0x9b/0xb0 [ 41.475201] SyS_readv+0x56/0x80 [ 41.478550] do_syscall_64+0x309/0x430 [ 41.482449] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.487616] Local variable description: ----flags.i.i.i@rcu_all_qs [ 41.493922] Variable was created at: [ 41.497626] rcu_all_qs+0x32/0x1f0 [ 41.501150] _cond_resched+0x3c/0xd0 [ 41.504847] ================================================================== [ 41.512183] Disabling lock debugging due to kernel taint [ 41.517626] Kernel panic - not syncing: panic_on_warn set ... [ 41.517626] [ 41.524974] CPU: 0 PID: 4518 Comm: syz-executor923 Tainted: G B 4.16.0+ #87 [ 41.533274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.542618] Call Trace: [ 41.545202] dump_stack+0x185/0x1d0 [ 41.548815] panic+0x39d/0x940 [ 41.552007] ? pointer+0x11e5/0x1410 [ 41.555714] kmsan_report+0x238/0x240 [ 41.559498] __msan_warning_32+0x6c/0xb0 [ 41.563542] ? futex_wait_queue_me+0x401/0x710 [ 41.568112] pointer+0x11e5/0x1410 [ 41.571643] ? futex_wait_queue_me+0x476/0x710 [ 41.576206] vsnprintf+0xa2d/0x33c0 [ 41.579818] seq_printf+0x29f/0x420 [ 41.583441] ? save_stack_trace_tsk+0x26a/0x2f0 [ 41.588102] ? futex_wait_queue_me+0x476/0x710 [ 41.592667] ? futex_wait_queue_me+0x476/0x710 [ 41.597233] ? futex_wait_queue_me+0x476/0x710 [ 41.601799] proc_pid_stack+0x326/0x470 [ 41.605755] proc_single_show+0x1af/0x300 [ 41.609880] ? proc_pid_wchan+0x250/0x250 [ 41.614009] ? proc_single_open+0x90/0x90 [ 41.618148] seq_read+0xc7d/0x2260 [ 41.621680] do_iter_read+0x880/0xd70 [ 41.625461] ? seq_open+0x360/0x360 [ 41.629071] do_readv+0x295/0x5f0 [ 41.632510] ? syscall_return_slowpath+0xe9/0x700 [ 41.637344] SYSC_readv+0x9b/0xb0 [ 41.640783] SyS_readv+0x56/0x80 [ 41.644132] do_syscall_64+0x309/0x430 [ 41.648014] ? vfs_readv+0x260/0x260 [ 41.651907] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 41.657084] RIP: 0033:0x445539 [ 41.660257] RSP: 002b:00007f8c54b1fd18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 41.667957] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445539 [ 41.675209] RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000003 [ 41.682472] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 41.689725] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f8c54b1fd20 [ 41.696973] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000001 [ 41.704798] Dumping ftrace buffer: [ 41.708324] (ftrace buffer empty) [ 41.712019] Kernel Offset: disabled [ 41.715624] Rebooting in 86400 seconds..