netdev - Re: [Patch net] net_sched: fix backward compatibility for TCA_ACT

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Message-ID: <20191008164022.2317271e@cakuba.netronome.com>
Date:   Tue, 8 Oct 2019 16:40:22 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     netdev@...r.kernel.org,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Jiri Pirko <jiri@...nulli.us>
Subject: Re: [Patch net] net_sched: fix backward compatibility for
 TCA_ACT_KIND

On Mon,  7 Oct 2019 13:26:29 -0700, Cong Wang wrote:
> For TCA_ACT_KIND, we have to keep the backward compatibility too,
> and rely on nla_strlcpy() to check and terminate the string with
> a NUL.
> 
> Note for TC actions, nla_strcmp() is already used to compare kind
> strings, so we don't need to fix other places.
> 
> Fixes: 199ce850ce11 ("net_sched: add policy validation for action attributes")
> Reported-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
> Cc: Jamal Hadi Salim <jhs@...atatu.com>
> Cc: Jiri Pirko <jiri@...nulli.us>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

Applied, queued for 4.14+ as well.