linux-kernel - Re: [PATCH v3] audit: log nftables configuration change events once per table

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Message-ID: <20210323213631.GA27244@breakpoint.cc>
Date:   Tue, 23 Mar 2021 22:36:31 +0100
From:   Florian Westphal <fw@...len.de>
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 v3] audit: log nftables configuration change events once
 per table

Richard Guy Briggs <rgb@...hat.com> wrote:
>  	nft_commit_notify(net, NETLINK_CB(skb).portid);
>  	nf_tables_gen_notify(net, skb, NFT_MSG_NEWGEN);
>  	nf_tables_commit_release(net);
>  
> +	nf_tables_commit_audit_log(&adl, net->nft.base_seq);

This meeds to be before nf_tables_commit_release() call, afaics this function
dereferences data structures that might be free'd already here.