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From: Christoph Lameter <>
To: Stephane Eranian <>
Subject: Re: kmalloc() with size zero
Date: Fri, 23 Mar 2007 08:12:39 -0700 (PDT)	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, 22 Mar 2007, Stephane Eranian wrote:

> I ran into an issue with perfmon where I ended up calling
> kmalloc() with a size of zero. To my surprise, this did
> not return NULL but a valid data address.
> I am wondering if this is a property of kmalloc() or simply
> a bug. It is the case that the __kmalloc() code does not
> check for zero size.

Correct SLAB will give you the smallest possible allocation. I'd say these 
calls should be fixed. SLUB does check for zero and will throw a stack 

      parent reply	other threads:[~2007-03-23 15:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-23  0:18 Stephane Eranian
2007-03-23  1:38 ` Jan Engelhardt
2007-03-23  4:39   ` Vignesh Babu BM
2007-03-25 16:30     ` Folkert van Heusden
2007-03-26  8:09       ` Stephane Eranian
2007-03-29 14:39         ` Bill Davidsen
2007-03-23 15:12 ` Christoph Lameter [this message]

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