linux-kernel - Re: kmalloc() with size zero

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Pine.LNX.4.61.0703230237390.9555@yvahk01.tjqt.qr>
Date:	Fri, 23 Mar 2007 02:38:25 +0100 (MET)
From:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
To:	Stephane Eranian <eranian@....hp.com>
cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, ak@...e.de
Subject: Re: kmalloc() with size zero


On Mar 22 2007 16:18, Stephane Eranian wrote:
>
>Hello,
>
>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.

I'd say "feature", glibc's malloc also returns an address on malloc(0).


Jan
-- 
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/