Re: [PATCH -tip v6 06/22] [BUGFIX] x86: Prohibit probing on memcpy/memset

From: Jovi Zhangwei
Date: Wed Dec 25 2013 - 09:45:17 EST

On Tue, Dec 24, 2013 at 11:58 PM, Masami Hiramatsu
<> wrote:
> (2013/12/24 18:53), Jovi Zhangwei wrote:
>>>> Still no crash, use your kernel config.
>>>> memcpy and __memcpy have same address in /proc/kallsyms.
>>>> Looks like a interesting problem.
>>> Agreed. In my case, those have same address, but only probing
>>> __memcpy caused a kernel crash. I'm not sure why, but it is
>>> safe to disable probing on it.
>> Shall we need dig further to address the root cause? IMO, the kprobe
>> should act same behavior when given same probe address, but it's look
>> so weird in your box. :)
> Hmm, right now, I tried it again and found the bug disappeared...
> I'm using the latest tip kernel for the test;
> 3ab838d7723e9fbfd49b2d395752bd68e1ef4b71
> Should I remove this patch until it happens again?
Yes, we can check the problem if it happens again in somewhere. :)


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