netdev - Re: [PATCH net 1/1] net: sched: fix ets qdisc OOB Indexing

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Message-ID: <CAM0EoMngnES=EXPz4Ym7JAm3y_SGtnxNu=HeGhuY=-FSMLYFbQ@mail.gmail.com>
Date: Sat, 11 Jan 2025 07:59:56 -0500
From: Jamal Hadi Salim <jhs@...atatu.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: netdev@...r.kernel.org, jiri@...nulli.us, xiyou.wangcong@...il.com, 
	davem@...emloft.net, edumazet@...gle.com, petrm@...lanox.com, 
	security@...nel.org, van fantasy <g1042620637@...il.com>
Subject: Re: [PATCH net 1/1] net: sched: fix ets qdisc OOB Indexing

On Fri, Jan 10, 2025 at 6:50 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Fri, 10 Jan 2025 10:35:46 -0500 Jamal Hadi Salim wrote:
> > Haowei Yan <g1042620637@...il.com> found that ets_class_from_arg() can
> > index an Out-Of-Bound class in ets_class_from_arg() when passed clid of
> > 0. The overflow may cause local privilege escalation.
>
> ets_class_leaf() does not nul-check the result, which crashes
> the kernel during selftests.

Ok, great we have a repro. Looking into it..

cheers,
jamal