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 '10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.740945] ================================================================== [ 43.748352] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 43.754217] CPU: 0 PID: 4499 Comm: syz-executor168 Not tainted 4.16.0+ #87 [ 43.761203] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.770538] Call Trace: [ 43.773120] dump_stack+0x185/0x1d0 [ 43.776728] ? pointer+0x11e5/0x1410 [ 43.780420] kmsan_report+0x142/0x240 [ 43.784199] __msan_warning_32+0x6c/0xb0 [ 43.788239] ? futex_wait_queue_me+0x401/0x710 [ 43.792854] pointer+0x11e5/0x1410 [ 43.796376] ? futex_wait_queue_me+0x476/0x710 [ 43.800933] vsnprintf+0xa2d/0x33c0 [ 43.804541] seq_printf+0x29f/0x420 [ 43.808158] ? save_stack_trace_tsk+0x26a/0x2f0 [ 43.812814] ? futex_wait_queue_me+0x476/0x710 [ 43.817374] ? futex_wait_queue_me+0x476/0x710 [ 43.821935] ? futex_wait_queue_me+0x476/0x710 [ 43.826496] proc_pid_stack+0x326/0x470 [ 43.830450] proc_single_show+0x1af/0x300 [ 43.834574] ? proc_pid_wchan+0x250/0x250 [ 43.838707] ? proc_single_open+0x90/0x90 [ 43.842831] seq_read+0xc7d/0x2260 [ 43.846355] do_iter_read+0x880/0xd70 [ 43.850142] ? seq_open+0x360/0x360 [ 43.853743] do_readv+0x295/0x5f0 [ 43.857179] SYSC_readv+0x9b/0xb0 [ 43.860610] SyS_readv+0x56/0x80 [ 43.863952] do_syscall_64+0x309/0x430 [ 43.867816] ? vfs_readv+0x260/0x260 [ 43.871529] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.876694] RIP: 0033:0x445589 [ 43.879860] RSP: 002b:00007f7f1812ad18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 43.887543] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445589 [ 43.894789] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 43.902039] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.909300] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f7f1812ad20 [ 43.916548] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 43.923793] [ 43.925393] Uninit was stored to memory at: [ 43.929695] kmsan_internal_chain_origin+0x12b/0x210 [ 43.934791] __msan_chain_origin+0x69/0xc0 [ 43.939006] __save_stack_trace+0x829/0xb00 [ 43.943312] save_stack_trace_tsk+0x258/0x2f0 [ 43.947788] proc_pid_stack+0x26a/0x470 [ 43.951737] proc_single_show+0x1af/0x300 [ 43.955862] seq_read+0xc7d/0x2260 [ 43.959377] do_iter_read+0x880/0xd70 [ 43.963152] do_readv+0x295/0x5f0 [ 43.966589] SYSC_readv+0x9b/0xb0 [ 43.970050] SyS_readv+0x56/0x80 [ 43.973395] do_syscall_64+0x309/0x430 [ 43.977260] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.982422] Uninit was stored to memory at: [ 43.986721] kmsan_internal_chain_origin+0x12b/0x210 [ 43.991800] __msan_chain_origin+0x69/0xc0 [ 43.996015] update_stack_state+0x959/0xa40 [ 44.000322] unwind_next_frame+0x618/0xe50 [ 44.004532] __save_stack_trace+0x734/0xb00 [ 44.008828] save_stack_trace_tsk+0x258/0x2f0 [ 44.013298] proc_pid_stack+0x26a/0x470 [ 44.017247] proc_single_show+0x1af/0x300 [ 44.021382] seq_read+0xc7d/0x2260 [ 44.024908] do_iter_read+0x880/0xd70 [ 44.028682] do_readv+0x295/0x5f0 [ 44.032115] SYSC_readv+0x9b/0xb0 [ 44.035544] SyS_readv+0x56/0x80 [ 44.038887] do_syscall_64+0x309/0x430 [ 44.042754] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.047917] Local variable description: ----flags.i.i.i@rcu_all_qs [ 44.054204] Variable was created at: [ 44.057896] rcu_all_qs+0x32/0x1f0 [ 44.061410] _cond_resched+0x3c/0xd0 [ 44.065093] ================================================================== [ 44.072422] Disabling lock debugging due to kernel taint [ 44.077980] Kernel panic - not syncing: panic_on_warn set ... [ 44.077980] [ 44.085319] CPU: 0 PID: 4499 Comm: syz-executor168 Tainted: G B 4.16.0+ #87 [ 44.093605] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.102932] Call Trace: [ 44.105500] dump_stack+0x185/0x1d0 [ 44.109105] panic+0x39d/0x940 [ 44.112281] ? pointer+0x11e5/0x1410 [ 44.115969] kmsan_report+0x238/0x240 [ 44.119744] __msan_warning_32+0x6c/0xb0 [ 44.123787] ? futex_wait_queue_me+0x401/0x710 [ 44.128344] pointer+0x11e5/0x1410 [ 44.131863] ? futex_wait_queue_me+0x476/0x710 [ 44.136419] vsnprintf+0xa2d/0x33c0 [ 44.140038] seq_printf+0x29f/0x420 [ 44.144142] ? save_stack_trace_tsk+0x26a/0x2f0 [ 44.148793] ? futex_wait_queue_me+0x476/0x710 [ 44.153352] ? futex_wait_queue_me+0x476/0x710 [ 44.157911] ? futex_wait_queue_me+0x476/0x710 [ 44.162468] proc_pid_stack+0x326/0x470 [ 44.166418] proc_single_show+0x1af/0x300 [ 44.170541] ? proc_pid_wchan+0x250/0x250 [ 44.174664] ? proc_single_open+0x90/0x90 [ 44.178786] seq_read+0xc7d/0x2260 [ 44.182764] do_iter_read+0x880/0xd70 [ 44.186547] ? seq_open+0x360/0x360 [ 44.190147] do_readv+0x295/0x5f0 [ 44.193914] SYSC_readv+0x9b/0xb0 [ 44.197502] SyS_readv+0x56/0x80 [ 44.201087] do_syscall_64+0x309/0x430 [ 44.205131] ? vfs_readv+0x260/0x260 [ 44.209927] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.215101] RIP: 0033:0x445589 [ 44.218264] RSP: 002b:00007f7f1812ad18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 44.225946] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445589 [ 44.234090] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 44.241337] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 44.248959] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f7f1812ad20 [ 44.256203] R13: 00000000006dac20 R14: 0000000000000000 R15: 0000000000000002 [ 44.263947] Dumping ftrace buffer: [ 44.267461] (ftrace buffer empty) [ 44.271143] Kernel Offset: disabled [ 44.274747] Rebooting in 86400 seconds..