netdev - Re: [patch net] net: sched: fix p_filter_chain check in tcf_chain

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Message-Id: <20170818.101941.1615431063902854741.davem@davemloft.net>
Date:   Fri, 18 Aug 2017 10:19:41 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     jiri@...nulli.us
Cc:     netdev@...r.kernel.org, jhs@...atatu.com, xiyou.wangcong@...il.com,
        mlxsw@...lanox.com
Subject: Re: [patch net] net: sched: fix p_filter_chain check in
 tcf_chain_flush

From: Jiri Pirko <jiri@...nulli.us>
Date: Fri, 18 Aug 2017 10:10:43 +0200

> From: Jiri Pirko <jiri@...lanox.com>
> 
> The dereference before check is wrong and leads to an oops when
> p_filter_chain is NULL. The check needs to be done on the pointer to
> prevent NULL dereference.
> 
> Fixes: f93e1cdcf42c ("net/sched: fix filter flushing")
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>

Applied, thanks Jiri.