Syzkaller: failed: got no coverage

[王铮 (Zheng Wang/11153)]

Hi All:

Recently I have met some problem will running syzkaller on Android kernel5.4.

 

While I run syzkaller,an error occurred:

 

2020/12/17 16:05:07 machine check failed: got no coverage:

2020/12/10 09:44:32 Manager.Check call failed: you failed

2020/12/17 16:05:07 vm-0: crash: lost connection to test machine

 

I have tried to delete some configs,but it didn’t work

 

I have add the syzkaller config,kenel config and the syzkaller log to the attachment.

 

Do you know some possible reason which may cause this problem?

Any suggestion would be helpful.

 

Thanks,

Zheng

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[Dmitry Vyukov]

On Thu, Dec 17, 2020 at 9:24 AM 王铮 (Zheng Wang/11153)
<Zheng...@unisoc.com> wrote:
>
> Hi All:
>
> Recently I have met some problem will running syzkaller on Android kernel5.4.
>
>
>
> While I run syzkaller,an error occurred:
>
>
>
> 2020/12/17 16:05:07 machine check failed: got no coverage:
>
> 2020/12/10 09:44:32 Manager.Check call failed: you failed
>
> 2020/12/17 16:05:07 vm-0: crash: lost connection to test machine
>
>
>
> I have tried to delete some configs,but it didn’t work
>
>
>
> I have add the syzkaller config,kenel config and the syzkaller log to the attachment.
>
>
>
> Do you know some possible reason which may cause this problem?
>
> Any suggestion would be helpful.
>
>
>
> Thanks,
>
> Zheng

You don't have code coverage enabled:

#0 [1722ms] <- mmap=0x1ffff000 errno=14 cover=0
#0 [1723ms] <- mmap=0x20000000 errno=14 cover=0
#1 [1723ms] <- mmap=0x21000000 errno=14 cover=0

2020/12/17 16:05:07 machine check failed: got no coverage:

Either disable it in the manager config, or enable it in kernel.

[王铮 (Zheng Wang/11153)]

Hi Dmitry,
Thanks for reply.

As the attachment config.gz,I have turned on the KCOV config,maybe it doesn't work.

Do you know how to fix this?

Thanks,
Zheng.Wang

-----邮件原件-----
发件人: Dmitry Vyukov <dvy...@google.com>
发送时间: 2020年12月17日 17:24
收件人: 王铮 (Zheng Wang/11153) <Zheng...@unisoc.com>
抄送: syzk...@googlegroups.com; 康兴锋 (Xingfeng Kang) <xingfe...@unisoc.com>; 孙政 (Zheng Sun) <Zhen...@unisoc.com>
主题: Re: Syzkaller: failed: got no coverage

[Dmitry Vyukov]

On Fri, Dec 18, 2020 at 3:10 AM 王铮 (Zheng Wang/11153)
<Zheng...@unisoc.com> wrote:
>
> Hi Dmitry,
> Thanks for reply.
>
> As the attachment config.gz,I have turned on the KCOV config,maybe it doesn't work.
>
> Do you know how to fix this?

Nothing comes to mind. It's generally just enabling CONFIG_KCOV.