netdev - Re: [PATCH][NETNS]: The ip6_fib_timer can work with garbage on net namespace stop.

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Message-Id: <20080424.011406.109706186.yoshfuji@linux-ipv6.org>
Date:	Thu, 24 Apr 2008 01:14:06 +0900 (JST)
From:	YOSHIFUJI Hideaki / 吉藤英明 
	<yoshfuji@...ux-ipv6.org>
To:	xemul@...nvz.org
Cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH][NETNS]: The ip6_fib_timer can work with garbage on net
 namespace stop.

In article <480C912E.70900@...nvz.org> (at Mon, 21 Apr 2008 17:05:50 +0400), Pavel Emelyanov <xemul@...nvz.org> says:

> The del_timer() function doesn't guarantee, that the timer callback
> is not active by the time it exits.
> 
> Thus, the fib6_net_exit() may kfree() all the data, that is required
> by the fib6_run_gc(). The race window is tiny, but slab poisoning can
> trigger this bug.
> 
> Using del_timer_sync() will cure this.
> 
> Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>

Acked-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>

Also suitable for -stable.

--yoshfuji
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