netdev - Re: [PATCH 1/5] [NETLINK]: Fix use after free in netlink

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Message-Id: <20070503.131139.66310255.davem@davemloft.net>
Date:	Thu, 03 May 2007 13:11:39 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	marcel@...tmann.org
Cc:	dhowells@...hat.com, akpm@...l.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, netdev@...r.kernel.org,
	kaber@...sh.net
Subject: Re: [PATCH 1/5] [NETLINK]: Fix use after free in netlink_recvmsg

From: Marcel Holtmann <marcel@...tmann.org>
Date: Thu, 03 May 2007 14:27:16 +0200

> Hi Dave,
> 
> > > When the user passes in MSG_TRUNC the skb is used after getting freed.
> > > 
> > > Signed-off-by: Patrick McHardy <kaber@...sh.net>
> > > Signed-off-by: David Howells <dhowells@...hat.com>
> > 
> > Ugh, good catch, applied :-)
> 
> it seems this could be easily exploited and is at least a local DoS. It
> should be a candidate for the -stable kernel.

The MSG_TRUNC change is in 2.6.22 GIT only.

You might want to check such things before making such statements. :-/

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