Date: Wed, 10 Aug 2011 14:21:15 -0400 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: New daily reports - nothing On Wed, Aug 10, 2011 at 08:23:37PM +0200, Luka Marčetić wrote: > On 08/10/2011 07:33 PM, Rich Felker wrote: > >What about SIZE_MAX>>(4*sizeof(size_t))? > > Never heard of it. What about PTRDIFF_MAX though? My point was that SIZE_MAX>>(4*sizeof(size_t)) is an easy way to get the square root of SIZE_MAX without long double arithmetic. PTRDIFF_T is rather irrelevant to testing calloc overflows, where the whole point is that A*B overflows SIZE_MAX and results in a small integer value where the allocation will certainly succeed. Rich
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