linux-kernel - Re: [RFC] fix slub krealloc()

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Date:	Wed, 25 Jul 2007 10:40:56 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Christoph Lameter <clameter@....com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] fix slub krealloc()


> > I think we already fixed this?

> >     Fix ZERO_OR_NULL_PTR(ZERO_SIZE_PTR)
> 
> There is no use of ZERO_OR_NULL ptr in krealloc. Linus added a check to
> ksize() instead so that ksize(NULL) returns 0 instead of failing.

However, this still doesn't fix the other corner case I pointed out:
krealloc(NULL, 0, GFP_KERNEL) will give you a NULL pointer instead of a
ZERO_SIZE_PTR afaict.

johannes

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