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Date:   Wed, 25 Apr 2018 16:58:52 +0200
From:   Stefano Brivio <sbrivio@redhat.com>
To:     Kees Cook <keescook@chromium.org>
Cc:     Andreas Christoforou <andreaschristofo@gmail.com>,
        kernel-hardening@lists.openwall.com,
        Steffen Klassert <steffen.klassert@secunet.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 ipsec-next] xfrm: remove VLA usage in __xfrm6_sort()
Message-ID: <20180425165852.6c7460c2@epycfail>
In-Reply-To: <20180425144639.GA38350@beast>
References: <20180425144639.GA38350@beast>
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On Wed, 25 Apr 2018 07:46:39 -0700
Kees Cook <keescook@chromium.org> wrote:

> In the quest to remove all stack VLA usage removed from the kernel[1],
> just use XFRM_MAX_DEPTH as already done for the "class" array. In one
> case, it'll do this loop up to 5, the other caller up to 6.
> 
> [1] https://lkml.org/lkml/2018/3/7/621
> 
> Co-developed-by: Andreas Christoforou <andreaschristofo@gmail.com>
> Signed-off-by: Kees Cook <keescook@chromium.org>
> ---
> v4:
> - actually remove memset(). :)
> v3:
> - adjust Subject and commit log (Steffen)
> - use "= { }" instead of memset() (Stefano)
> v2:
> - use XFRM_MAX_DEPTH for "count" array (Steffen and Mathias).
> ---

Acked-by: Stefano Brivio <sbrivio@redhat.com>