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

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Message-Id: <1178195236.6891.58.camel@violet>
Date:	Thu, 03 May 2007 14:27:16 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	David Miller <davem@...emloft.net>
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

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.

Regards

Marcel


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