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 '10.128.10.8' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.551720] ================================================================== [ 43.559125] BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 [ 43.564989] CPU: 0 PID: 4465 Comm: syz-executor875 Not tainted 4.16.0+ #87 [ 43.572759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.582113] Call Trace: [ 43.584690] dump_stack+0x185/0x1d0 [ 43.588301] ? pointer+0x11e5/0x1410 [ 43.591999] kmsan_report+0x142/0x240 [ 43.595786] __msan_warning_32+0x6c/0xb0 [ 43.599827] ? futex_wait_queue_me+0x401/0x710 [ 43.604383] pointer+0x11e5/0x1410 [ 43.607902] ? futex_wait_queue_me+0x476/0x710 [ 43.612462] vsnprintf+0xa2d/0x33c0 [ 43.616069] seq_printf+0x29f/0x420 [ 43.619684] ? save_stack_trace_tsk+0x26a/0x2f0 [ 43.624335] ? futex_wait_queue_me+0x476/0x710 [ 43.628895] ? futex_wait_queue_me+0x476/0x710 [ 43.633461] ? futex_wait_queue_me+0x476/0x710 [ 43.638030] proc_pid_stack+0x326/0x470 [ 43.641991] proc_single_show+0x1af/0x300 [ 43.646120] ? proc_pid_wchan+0x250/0x250 [ 43.650245] ? proc_single_open+0x90/0x90 [ 43.654366] seq_read+0xc7d/0x2260 [ 43.657889] do_iter_read+0x880/0xd70 [ 43.661667] ? seq_open+0x360/0x360 [ 43.665272] do_readv+0x295/0x5f0 [ 43.668710] SYSC_readv+0x9b/0xb0 [ 43.672143] SyS_readv+0x56/0x80 [ 43.675487] do_syscall_64+0x309/0x430 [ 43.679356] ? vfs_readv+0x260/0x260 [ 43.683050] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.688215] RIP: 0033:0x445559 [ 43.691380] RSP: 002b:00007f3b38146d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 43.699063] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445559 [ 43.706309] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 43.713564] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 43.720809] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f3b38146d20 [ 43.728054] R13: 00000000006dac20 R14: 0030656c69662f2e R15: 0000000000000001 [ 43.735307] [ 43.736910] Uninit was stored to memory at: [ 43.741211] kmsan_internal_chain_origin+0x12b/0x210 [ 43.746294] __msan_chain_origin+0x69/0xc0 [ 43.750504] __save_stack_trace+0x829/0xb00 [ 43.754803] save_stack_trace_tsk+0x258/0x2f0 [ 43.759272] proc_pid_stack+0x26a/0x470 [ 43.763226] proc_single_show+0x1af/0x300 [ 43.767348] seq_read+0xc7d/0x2260 [ 43.770864] do_iter_read+0x880/0xd70 [ 43.774638] do_readv+0x295/0x5f0 [ 43.778076] SYSC_readv+0x9b/0xb0 [ 43.781505] SyS_readv+0x56/0x80 [ 43.784846] do_syscall_64+0x309/0x430 [ 43.788710] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.793870] Uninit was stored to memory at: [ 43.798168] kmsan_internal_chain_origin+0x12b/0x210 [ 43.803247] __msan_chain_origin+0x69/0xc0 [ 43.807460] update_stack_state+0x959/0xa40 [ 43.811759] unwind_next_frame+0x618/0xe50 [ 43.815971] __save_stack_trace+0x734/0xb00 [ 43.820269] save_stack_trace_tsk+0x258/0x2f0 [ 43.824742] proc_pid_stack+0x26a/0x470 [ 43.828693] proc_single_show+0x1af/0x300 [ 43.832815] seq_read+0xc7d/0x2260 [ 43.836342] do_iter_read+0x880/0xd70 [ 43.840120] do_readv+0x295/0x5f0 [ 43.843551] SYSC_readv+0x9b/0xb0 [ 43.846993] SyS_readv+0x56/0x80 [ 43.850341] do_syscall_64+0x309/0x430 [ 43.854214] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 43.859376] Local variable description: ----flags.i.i.i@rcu_all_qs [ 43.865664] Variable was created at: [ 43.869356] rcu_all_qs+0x32/0x1f0 [ 43.872872] _cond_resched+0x3c/0xd0 [ 43.876556] ================================================================== [ 43.883884] Disabling lock debugging due to kernel taint [ 43.889306] Kernel panic - not syncing: panic_on_warn set ... [ 43.889306] [ 43.896644] CPU: 0 PID: 4465 Comm: syz-executor875 Tainted: G B 4.16.0+ #87 [ 43.904932] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.914260] Call Trace: [ 43.916836] dump_stack+0x185/0x1d0 [ 43.920445] panic+0x39d/0x940 [ 43.923623] ? pointer+0x11e5/0x1410 [ 43.927315] kmsan_report+0x238/0x240 [ 43.931102] __msan_warning_32+0x6c/0xb0 [ 43.935144] ? futex_wait_queue_me+0x401/0x710 [ 43.939700] pointer+0x11e5/0x1410 [ 43.943220] ? futex_wait_queue_me+0x476/0x710 [ 43.947778] vsnprintf+0xa2d/0x33c0 [ 43.951385] seq_printf+0x29f/0x420 [ 43.955000] ? save_stack_trace_tsk+0x26a/0x2f0 [ 43.959655] ? futex_wait_queue_me+0x476/0x710 [ 43.964217] ? futex_wait_queue_me+0x476/0x710 [ 43.968779] ? futex_wait_queue_me+0x476/0x710 [ 43.973340] proc_pid_stack+0x326/0x470 [ 43.977296] proc_single_show+0x1af/0x300 [ 43.981425] ? proc_pid_wchan+0x250/0x250 [ 43.985550] ? proc_single_open+0x90/0x90 [ 43.989674] seq_read+0xc7d/0x2260 [ 43.993199] do_iter_read+0x880/0xd70 [ 43.996977] ? seq_open+0x360/0x360 [ 44.000581] do_readv+0x295/0x5f0 [ 44.004031] SYSC_readv+0x9b/0xb0 [ 44.007474] SyS_readv+0x56/0x80 [ 44.010817] do_syscall_64+0x309/0x430 [ 44.014683] ? vfs_readv+0x260/0x260 [ 44.018375] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 44.023539] RIP: 0033:0x445559 [ 44.026702] RSP: 002b:00007f3b38146d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 44.034386] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445559 [ 44.041632] RDX: 0000000000000001 RSI: 000000002066dff0 RDI: 0000000000000003 [ 44.048877] RBP: 0000000000000000 R08: 65732f636f72702f R09: 65732f636f72702f [ 44.056126] R10: 65732f636f72702f R11: 0000000000000246 R12: 00007f3b38146d20 [ 44.063373] R13: 00000000006dac20 R14: 0030656c69662f2e R15: 0000000000000001 [ 44.071065] Dumping ftrace buffer: [ 44.074584] (ftrace buffer empty) [ 44.078269] Kernel Offset: disabled [ 44.081875] Rebooting in 86400 seconds..