linux-kernel - Re: af_key: pfkey_dump needs parameter validation

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Date:   Wed, 22 Jul 2020 11:33:18 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Mark Salyzyn <salyzyn@...roid.com>
CC:     <linux-kernel@...r.kernel.org>, <kernel-team@...roid.com>,
        <netdev@...r.kernel.org>, Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: af_key: pfkey_dump needs parameter validation

On Tue, Jul 21, 2020 at 06:23:54AM -0700, Mark Salyzyn wrote:
> In pfkey_dump() dplen and splen can both be specified to access the
> xfrm_address_t structure out of bounds in__xfrm_state_filter_match()
> when it calls addr_match() with the indexes.  Return EINVAL if either
> are out of range.
> 
> Signed-off-by: Mark Salyzyn <salyzyn@...roid.com>
> Cc: netdev@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: kernel-team@...roid.com
> ---
> Should be back ported to the stable queues because this is a out of
> bounds access.

Please do a v2 and add a proper 'Fixes' tag if this is a fix that
needs to be backported.

Thanks!