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Date:	Mon, 26 Nov 2007 16:56:01 +0100
From:	Patrick McHardy <>
To:	Herbert Xu <>
CC:	"David S. Miller" <>,
	Linux Netdev List <>
Subject: Re: [XFRM]: Fix leak of expired xfrm_states

Herbert Xu wrote:
> On Mon, Nov 26, 2007 at 04:51:42PM +0100, Patrick McHardy wrote:
>> It actually won't get freed at all currently since nothing is
>> calling __xfrm_state_destroy(). __xfrm_state_delete() uses
>> __xfrm_state_put(), which only decrements the refcount, but
>> doesn't perform destruction.
>> This is visible when looking at the xfrm[46]_mode_{tunnel,transport}
>> module reference counts, they climb higher and higher over time.
> Oh I see.  How about just removing those double underscores then?

That should work as long as we keep the del_timer_sync to avoid
a use-after-free. It seems a bit fragile though.
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