netdev - Re: [IPSEC] flow: Cache negative results

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Date:	Wed, 10 Jan 2007 01:24:29 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	herbert.xu@...hat.com
Cc:	jmorris@...hat.com, netdev@...r.kernel.org
Subject: Re: [IPSEC] flow: Cache negative results

From: Herbert Xu <herbert.xu@...hat.com>
Date: Wed, 10 Jan 2007 18:22:51 +1100

> This patch also happens to fix a nasty bug where if an expiring
> flow entry that's not at the head happens to trigger a security
> denial, all entries before it are removed from the cache and
> leaked.

Nasty, this is because "fle != NULL" can occur in the
'nocache' path for two reasons.  New entry, or the case
that's buggy here, existing entry with out-of-date generation
ID.

Thanks Herbert, I'll look this over some more and apply it some
time tomorrow.

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