From: Dave Jones <davej@redhat.com>
To: Adrian Bunk <bunk@stusta.de>
Cc: bcollins@debian.org, dan@dennedy.org,
linux1394-devel@lists.sourceforge.net, scjody@steamballoon.com,
linux-kernel@vger.kernel.org, stable@kernel.org
Subject: Re: [2.6 patch] drivers/ieee1394/raw1394.c: fix a NULL pointer dereference
Date: Sun, 20 Nov 2005 18:40:55 -0500 [thread overview]
Message-ID: <20051120234055.GF28918@redhat.com> (raw)
In-Reply-To: <20051120232009.GH16060@stusta.de>
On Mon, Nov 21, 2005 at 12:20:09AM +0100, Adrian Bunk wrote:
> The coverity checker spotted that this was a NULL pointer dereference in
> the "if (copy_from_user(...))" case.
>
>
> Signed-off-by: Adrian Bunk <bunk@stusta.de>
>
> --- linux-2.6.15-rc1-mm2-full/drivers/ieee1394/raw1394.c.old 2005-11-20 22:08:57.000000000 +0100
> +++ linux-2.6.15-rc1-mm2-full/drivers/ieee1394/raw1394.c 2005-11-20 22:09:34.000000000 +0100
> @@ -2166,7 +2166,8 @@
> }
> }
> }
> - kfree(cache->filled_head);
> + if(cache->filled_head)
> + kfree(cache->filled_head);
> kfree(cache);
>
> if (ret >= 0) {
>
How do we get that far with a NULL filled_head ?
If the kmalloc that fills cache->filled_head fails, we bail out early above.
Dave
next prev parent reply other threads:[~2005-11-20 23:42 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-20 23:20 [2.6 patch] drivers/ieee1394/raw1394.c: fix a NULL pointer dereference Adrian Bunk
2005-11-20 23:33 ` Jody McIntyre
2005-11-20 23:46 ` Adrian Bunk
2005-11-20 23:54 ` Adrian Bunk
2005-11-20 23:40 ` Dave Jones [this message]
2005-11-20 23:52 ` Adrian Bunk
2005-11-21 19:13 ` Stefan Richter
2005-11-21 18:56 ` Ben Collins
2005-11-21 21:52 ` Jody McIntyre
2005-11-21 22:09 ` Stefan Richter
2005-11-21 22:32 ` Jody McIntyre
2005-11-21 21:55 ` Jody McIntyre
2005-11-20 23:45 ` Jesper Juhl
2005-11-20 23:54 ` Adrian Bunk
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