[PATCH] Check for overflow in __alloc_dir

[Florian Weimer]

On 10/11/2012 10:17 PM, Roland McGrath wrote:

> If st_blksize might ever be any kind of bogus, then I think it's better
> just to cap it to some reasonable maximum (maybe a megabyte or two?).

Good idea.  What about this?  Manual testing shows that the large malloc 
attempt is gone, and there are no regressions.

-- 
Florian Weimer / Red Hat Product Security Team
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