netdev - Re: [PATCH][net-next] netfilter: ebtables: use array_size() helper in copy_{from,to}

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Message-ID: <YXGuY2LjiBb5M+jn@salvia>
Date:   Thu, 21 Oct 2021 20:16:03 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH][net-next] netfilter: ebtables: use array_size() helper
 in copy_{from,to}_user()

On Thu, Oct 21, 2021 at 10:00:34AM -0700, Kees Cook wrote:
> On Tue, Sep 28, 2021 at 03:06:47PM -0500, Gustavo A. R. Silva wrote:
> > Use array_size() helper instead of the open-coded version in
> > copy_{from,to}_user().  These sorts of multiplication factors
> > need to be wrapped in array_size().
> > 
> > Link: https://github.com/KSPP/linux/issues/160
> > Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
> 
> Thanks!
> 
> Reviewed-by: Kees Cook <keescook@...omium.org>
> 
> I see that this is marked "Awaiting Upstream" (for an ebtables
> maintainer ack?)
> https://patchwork.kernel.org/project/netdevbpf/patch/20210928200647.GA266402@embeddedor/

I'll route this through the netfilter tree, thanks.