netdev - Re: [PATCH nf] netfilter: nf_tables: move dumper state alloation into ->start

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Message-Id: <20180723.094734.1171302416140052925.davem@davemloft.net>
Date:   Mon, 23 Jul 2018 09:47:34 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     fw@...len.de
Cc:     netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
        cscnull@...il.com
Subject: Re: [PATCH nf] netfilter: nf_tables: move dumper state alloation
 into ->start

From: Florian Westphal <fw@...len.de>
Date: Mon, 23 Jul 2018 12:47:14 +0200

> Shaochun Chen points out we leak dumper filter state allocations
> stored in dump_control->data in case there is an error before netlink sets
> cb_running (after which ->done will be called at some point).
> 
> In order to fix this, add .start functions and do the allocations
> there.
> 
> ->done is going to clean up, and in case error occurs before
> ->start invocation no cleanups need to be done anymore.
> 
> Reported-by: shaochun chen <cscnull@...il.com>
> Signed-off-by: Florian Westphal <fw@...len.de>

Acked-by: David S. Miller <davem@...emloft.net>