netdev - Re: boot crash in arp_error

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Message-Id: <20100527.161011.104042698.davem@davemloft.net>
Date:	Thu, 27 May 2010 16:10:11 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	torvalds@...ux-foundation.org, mingo@...e.hu, tglx@...utronix.de,
	akpm@...ux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: boot crash in arp_error_report()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 27 May 2010 22:18:24 +0200

> [PATCH] net: fix __neigh_event_send()
> 
> commit 7fee226ad23 (net: add a noref bit on skb dst) missed one spot
> where an skb is enqueued, with a possibly not refcounted dst entry.
> 
> __neigh_event_send() inserts skb into arp_queue, so we must make sure
> dst entry is refcounted, or dst entry can be freed by garbage collector
> after caller exits from rcu protected section.
> 
> Reported-by: Ingo Molnar <mingo@...e.hu>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks Eric.

Ingo can we get a confirmation that this fixes the bootup crash?

Thanks!
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