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

From: Masami Hiramatsu
Date: Tue Dec 24 2013 - 10:58:15 EST

(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;

Should I remove this patch until it happens again?

Thank you,

IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory

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