netdev - Re: [PATCH] OOPS with NETLINK_FIB

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Message-Id: <20071221.013321.164620125.davem@davemloft.net>
Date:	Fri, 21 Dec 2007 01:33:21 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	den@...nvz.org
Cc:	devel@...nvz.org, netdev@...r.kernel.org, kaber@...sh.net,
	kuznet@....inr.ac.ru
Subject: Re: [PATCH] OOPS with NETLINK_FIB_LOOKUP netlink socket

From: "Denis V. Lunev" <den@...nvz.org>
Date: Fri, 21 Dec 2007 12:00:43 +0300

> nl_fib_input re-reuses incoming skb to send the reply. This means that this
> packet will be freed twice, namely in:
> - netlink_unicast_kernel
> - on receive path
> Use clone to send as a cure, the caller is responsible for kfree_skb on error.
> 
> Thanks to Alexey Dobryan, who originally found the problem.
> 
> Signed-off-by: Denis V. Lunev <den@...nvz.org>

What introduced this bug?  This code didn't have this
problem previously.
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