netdev - Re: [Patch net-next] net_sched: check NULL in tcf_block

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Date:   Fri, 3 Nov 2017 07:56:19 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     netdev@...r.kernel.org, dave.taht@...il.com,
        Jiri Pirko <jiri@...lanox.com>
Subject: Re: [Patch net-next] net_sched: check NULL in tcf_block_put()

Fri, Nov 03, 2017 at 01:32:08AM CET, xiyou.wangcong@...il.com wrote:
>Callers of tcf_block_put() could pass NULL so
>we can't use block->q before checking if block is
>NULL or not.
>
>tcf_block_put_ext() callers are fine, it is always
>non-NULL.
>
>Fixes: 8c4083b30e56 ("net: sched: add block bind/unbind notif. and extended block_get/put")
>Reported-by: Dave Taht <dave.taht@...il.com>
>Cc: Jiri Pirko <jiri@...lanox.com>
>Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

Reviewed-by: Jiri Pirko <jiri@...lanox.com>