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

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Message-ID: <20191008164001.7c07fa9a@cakuba.netronome.com>
Date:   Tue, 8 Oct 2019 16:40:01 -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_KIND

On Mon,  7 Oct 2019 13:26:28 -0700, Cong Wang wrote:
> Marcelo noticed a backward compatibility issue of TCA_KIND
> after we move from NLA_STRING to NLA_NUL_STRING, so it is probably
> too late to change it.
> 
> Instead, to make everyone happy, we can just insert a NUL to
> terminate the string with nla_strlcpy() like we do for TC actions.
> 
> Fixes: 62794fc4fbf5 ("net_sched: add max len check for TCA_KIND")
> 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+, thanks!