netdev - Re: [PATCH net-next] net: ethtool: fix NULL pointer dereference in stats_prepare

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230125005333.dmphl4vuwnh66moa@skbuf>
Date:   Wed, 25 Jan 2023 02:53:33 +0200
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Michal Kubecek <mkubecek@...e.cz>
Subject: Re: [PATCH net-next] net: ethtool: fix NULL pointer dereference in
 stats_prepare_data()

On Tue, Jan 24, 2023 at 04:52:23PM -0800, Jakub Kicinski wrote:
> On Wed, 25 Jan 2023 02:45:17 +0200 Vladimir Oltean wrote:
> > > Choose one:
> > >  - you disagree with my comment on the report
> > >  - you don't think that we should mix the immediate fix with the
> > >    structural change
> > >  - you agree but "don't have the time" to fix this properly  
> > 
> > Yeah, sorry, I shouldn't have left your question unanswered ("should we make
> > a fake struct genl_info * to pass here?") - but I don't think I'm qualified
> > enough to have an opinion, either. Whereas the immediate fix is neutral
> > enough to not be controversial, or so I thought.
> > 
> > The problem is not so much "the time to fix this properly", but rather,
> > I'm not even sure how to trigger the ethtool dumpit() code...
> 
> Ack, makes sense. I just wanted to make sure you weren't disagreeing.

Since we're talking about it, do you know how to exercise that code?