Re: KVM: s390: Use memdup_user() rather than duplicating code

From	SF Markus Elfring <elfring@users.sourceforge.net>
Newsgroups	linux.kernel
Subject	Re: KVM: s390: Use memdup_user() rather than duplicating code
Date	2016-10-03 16:30 +0200
Message-ID	<socpH-65o-3@gated-at.bofh.it> (permalink)
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>> * Does there really a probability remain that an inappropriate product
>>   would be calculated here (as the situation was before my two update steps
>>   for this software module)?
> 
> Perhaps not. Hence my "Probably not an issue here, ...".

Thanks for your clarification.


>> * Can it be that you are looking for a variant of a function like "memdup_user"
>>   where values can be passed as separate parameters "count" and "size" so that
>>   the needed multiplication and corresponding overflow check would be performed
>>   together as desired?
> 
> If there are enough uses, and people like it, adding memdup_user_array()
> may be a good idea...

How are the chances of such an addition for the Linux programming interface?


> P.S. Why do your questions make me think of a scientific paper? ;-)

Would you like to recommend any for further reading?   ;-)

Regards,
Markus

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Re: [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than  duplicating code Geert Uytterhoeven <geert@linux-m68k.org> - 2016-10-03 14:20 +0200
  Re: [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than  duplicating code SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-03 14:30 +0200
    Re: [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than  duplicating code Geert Uytterhoeven <geert@linux-m68k.org> - 2016-10-03 15:20 +0200
      Re: [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than  duplicating code SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-03 15:50 +0200
        Re: [PATCH v2 2/2] KVM: s390: Use memdup_user() rather than  duplicating code Geert Uytterhoeven <geert@linux-m68k.org> - 2016-10-03 16:10 +0200
          Re: KVM: s390: Use memdup_user() rather than duplicating code SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-03 16:30 +0200

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