From: Pablo Neira Ayuso <pablo@netfilter.org>
To: gfree.wind@vip.163.com
Cc: stephen@networkplumber.org, fw@strlen.de,
netfilter-devel@vger.kernel.org
Subject: Re: [PATCH nf v2] ebtables: arpreply: Add the standard target sanity check
Date: Tue, 16 May 2017 10:24:00 +0200 [thread overview]
Message-ID: <20170516082400.GA11114@salvia> (raw)
In-Reply-To: <1494898218-97426-1-git-send-email-gfree.wind@vip.163.com>
On Tue, May 16, 2017 at 09:30:18AM +0800, gfree.wind@vip.163.com wrote:
> From: Gao Feng <gfree.wind@vip.163.com>
>
> The info->target is from userspace and it would be used directly.
> So we need to add the sanity check to make sure it is a valid standard
> target, although the ebtables tool has already checked it. Kernel need
> to check anything from userspace.
>
> If the target was set as an evil value, it would break the ebtables
> and cause a panic. Because the non-standard target is treated as one
> offset.
>
> Now add one helper function ebt_invalid_target, and we would replace
> the macro INVALID_TARGET later.
Applied, thanks.
There is a few bunch of spots that can use this indeed. Follow up with
a patch for nf-next once merge window opens up.
next prev parent reply other threads:[~2017-05-16 8:24 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-16 1:30 [PATCH nf v2] ebtables: arpreply: Add the standard target sanity check gfree.wind
2017-05-16 8:24 ` Pablo Neira Ayuso [this message]
2017-05-16 9:43 ` Pablo Neira Ayuso
2017-05-16 9:53 ` Gao Feng
2017-05-16 9:55 ` Pablo Neira Ayuso
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