Re: [Oops 1/2]Something wrong with copy_from_user() function

[Andy Lutomirski]

On 04/30/2011 02:13 AM, Harry Wei wrote:
> Hi us,
> 	When i was compiling 2.6.38.2 kernel. Something wrong happend to me.
> It shows like following.
>
> [...]
> Warning: call to 'copy_from_user_overflow' declared with attribute warning:
> copy_from_user buffer size is not provably correct.
> [...]
>
> See http://s1202.photobucket.com/albums/bb364/harrywei/Kernel/?action=view&current=report_bug.png for details.
> 	I tried to fix this warning, but i don't know how to deal with
> it. Can anyone help me.

That's a bug (maybe) in drivers/staging/vt6656/wpactl.c, which is a 
staging driver and therefore liable to be imperfect.  You could ignore 
it or fix it and submit a patch.

(The bug isn't in copy_from_user -- it's an intentional warning in there 
to indicate that something might be wrong with the caller.)

--Andy

> Thanks.
> Harry Wei.

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