linux-kernel - Re: sparc oops in ip_fast

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Message-ID: <20080106010358.GA2991@gondor.apana.org.au>
Date:	Sun, 6 Jan 2008 12:03:59 +1100
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Jan Engelhardt <jengelh@...putergmbh.de>
Cc:	Al Viro <viro@...IV.linux.org.uk>, m.kozlowski@...land.pl,
	davem@...emloft.net, sparclinux@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: sparc oops in ip_fast_csum

On Sun, Jan 06, 2008 at 01:57:13AM +0100, Jan Engelhardt wrote:
>
> >@@ -304,7 +305,8 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
> > 		goto error_fault;
> > 
> > 	/* We don't modify invalid header */
> >-	if (length >= sizeof(*iph) && iph->ihl * 4U <= length) {
> >+	iphlen = iph->ihl * 4;
> >+	if (iphlen >= sizeof(*iph) && iphlen <= length) {
> 
> Humm, this could use ip_hdrlen(skb) :-)

That would not necessarily be an improvement since we'd have to reload
the values from skb.

Cheers,
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