netdev - Re: [PATCH] Prevent reading uninitialized memory with socketfilters

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Message-Id: <20101110.103234.183039029.davem@davemloft.net>
Date:	Wed, 10 Nov 2010 10:32:34 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	penguin-kernel@...ove.SAKURA.ne.jp
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH] Prevent reading uninitialized memory with socketfilters

From: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Date: Wed, 10 Nov 2010 23:25:08 +0900

> Just I thought...
> 
>> unsigned int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int flen)
>> {
>> 	struct sock_filter *fentry;     /* We walk down these */
> Can't this be "const struct sock_filter *"?
>> (...snipped...)
>> 	for (pc = 0; pc < flen; pc++) {
>> 		fentry = &filter[pc];
> Can't we do
> 		u32 f_k = fentry->k;
> and replace 27 repetition of fentry->k with f_k?

Yes, this feedback seems reasonable, I'll make these changes when I
apply Eric's patch, thanks!
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