linux-kernel - Re: [PATCH v5] audit: log nftables configuration change events once per table

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Message-ID: <20210331202230.GA4109@salvia>
Date:   Wed, 31 Mar 2021 22:22:30 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Richard Guy Briggs <rgb@...hat.com>
Cc:     Linux-Audit Mailing List <linux-audit@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        netfilter-devel@...r.kernel.org, Paul Moore <paul@...l-moore.com>,
        Eric Paris <eparis@...isplace.org>,
        Steve Grubb <sgrubb@...hat.com>,
        Florian Westphal <fw@...len.de>, Phil Sutter <phil@....cc>,
        twoerner@...hat.com, tgraf@...radead.org, dan.carpenter@...cle.com,
        Jones Desougi <jones.desougi+netfilter@...il.com>
Subject: Re: [PATCH v5] audit: log nftables configuration change events once
 per table

On Fri, Mar 26, 2021 at 01:38:59PM -0400, Richard Guy Briggs wrote:
> Reduce logging of nftables events to a level similar to iptables.
> Restore the table field to list the table, adding the generation.
> 
> Indicate the op as the most significant operation in the event.

There's a UAF, Florian reported. I'm attaching an incremental fix.

nf_tables_commit_audit_collect() refers to the trans object which
might have been already released.

View attachment "fix-uaf.patch" of type "text/x-diff" (1080 bytes)