netdev - Re: [PATCH] netfilter: synproxy: fix nf_synproxy_ipv{4,6}

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Date:   Wed, 19 Jun 2019 18:04:22 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Fernando Fernandez Mancera <ffmancera@...eup.net>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netfilter: synproxy: fix nf_synproxy_ipv{4,6}_init()
 return code

On Wed, Jun 19, 2019 at 02:53:07PM +0200, Arnd Bergmann wrote:
> We return an uninitialized variable on success:
> 
> net/netfilter/nf_synproxy_core.c:793:6: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized]
>         if (snet->hook_ref4 == 0) {
>             ^~~~~~~~~~~~~~~~~~~~
> 
> Initialize the return code to zero first.

Thanks Arnd. We got a fix for this:

https://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git/commit/?id=72c5e11854afb842e157353be0291d65b91725f5