linux-kernel - Re: [PATCH 2/3] netfilter: hide reference to nf_hooks

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Message-ID: <f7toa35pba7.fsf@redhat.com>
Date:   Fri, 30 Sep 2016 13:06:40 -0400
From:   Aaron Conole <aconole@...heb.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Patrick McHardy <kaber@...sh.net>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Westphal <fw@...len.de>,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] netfilter: hide reference to nf_hooks_ingress

Arnd Bergmann <arnd@...db.de> writes:

> A recent cleanup added an unconditional reference to the nf_hooks_ingress pointer,
> but that fails when CONFIG_NETFILTER_INGRESS is disabled and that member is
> not present in net_device:
>
> net/netfilter/core.c: In function 'nf_set_hooks_head':
> net/netfilter/core.c:96:30: error: 'struct net_device' has no member named 'nf_hooks_ingress'
>
> This avoids the build error by simply enclosing the assignment in an #ifdef,
> which may or may not be the correct fix.

NAK, it's not the right fix.  The entry being set may be leaked with only this
hunk.  I've posted a complete fix for this.

Sorry that it was broken.