netdev - Re: [PATCH net-next-2.6] netlink: netlink

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Message-ID: <1281939753.3683.5.camel@jlt3.sipsolutions.net>
Date:	Mon, 16 Aug 2010 08:22:33 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6] netlink: netlink_recvmsg() fix

On Mon, 2010-08-16 at 08:10 +0200, Eric Dumazet wrote:

> We'll find another way to address the problem.

For my understanding: The problem is that the save/restore of the
frag_list skb can race so a second reader will not see the frag_list skb
because it gets there while it's NULL. This happens with MSG_PEEK, or
with clones of the SKB since skb_shared_info is invariant across clones.

Correct?

johannes

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