netdev - Re: [PATCH][XFRM] Optimize policy dumping

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Message-ID: <45744559.1000108@trash.net>
Date:	Mon, 04 Dec 2006 16:57:13 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	unlisted-recipients:; (no To-header on input)
CC:	hadi@...erus.ca, David Miller <davem@...emloft.net>,
	netdev@...r.kernel.org
Subject: Re: [PATCH][XFRM] Optimize policy dumping

Patrick McHardy wrote:
> jamal wrote:
> 
>>All the way down, you call func with a NULL entry. You could add a check
>>to make sure it only gets invoked when last is not null, but the result
>>is in such a case, you will never send a 0 count element. I am sure
>>there could be other tricky scenarios like this that could be
>>constructed.
>>
>>Thoughts.
> 
> 
> Double sending can't happen, but you're right about potentially
> sending a NULL ptr when after setting it to NULL we don't find
> any other matching elements.
> 
> This patch should fix it (and is even simpler), by moving the
> check for pol->type != type before sending, we make sure that
> last always contains a valid element unless count == 0.
> 
> Also fixed an incorrect gcc warning about last_dir potentially
> being used uninitialized.


And again for SAs ..


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