netdev - Re: [PATCH 4/6] xfrm_user: fix info leak in copy_to_user

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Message-ID: <20120920072608.GB4221@secunet.com>
Date:	Thu, 20 Sep 2012 09:26:08 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Mathias Krause <minipli@...glemail.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Brad Spengler <spender@...ecurity.net>
Subject: Re: [PATCH 4/6] xfrm_user: fix info leak in copy_to_user_tmpl()

On Wed, Sep 19, 2012 at 11:33:41PM +0200, Mathias Krause wrote:
> The memory used for the template copy is a local stack variable. As
> struct xfrm_user_tmpl contains multiple holes added by the compiler for
> alignment, not initializing the memory will lead to leaking stack bytes
> to userland. Add an explicit memset(0) to avoid the info leak.
> 
> Initial version of the patch by Brad Spengler.
> 
> Cc: Brad Spengler <spender@...ecurity.net>
> Signed-off-by: Mathias Krause <minipli@...glemail.com>

Patches 1-4:

Acked-by: Steffen Klassert <steffen.klassert@...unet.com>

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