Re: [-mm PATCH][4/4] net: signed vs unsigned cleanup in net/ipv4/raw.c

[Jesper Juhl <juhl-lkml@xxxxxx>]

On Wed, 15 Jun 2005, David S. Miller wrote:

> From: Jesper Juhl <juhl-lkml@xxxxxx>
> Date: Wed, 15 Jun 2005 23:32:22 +0200 (CEST)
> 
> > -   if (length >= sizeof(*iph) && iph->ihl * 4 <= length) {
> > +   if (length >= sizeof(*iph) && (size_t)(iph->ihl * 4) <= length) {
> 
> Would changing the "4" into "4U" kill this warning just the same?
> 
It would.

> I think I'd prefer that.
> 
No problem. Here's a replacement patch nr. 4 : 


Signed-off-by: Jesper Juhl <juhl-lkml@xxxxxx>
---

 net/ipv4/raw.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

--- linux-2.6.12-rc6-mm1/net/ipv4/raw.c.with_patch-3    2005-06-15 
23:17:23.000000000 +0200
+++ linux-2.6.12-rc6-mm1/net/ipv4/raw.c 2005-06-15 23:37:11.000000000 +0200
@@ -259,7 +259,7 @@ int raw_rcv(struct sock *sk, struct sk_b
        return 0;
 }
 
-static int raw_send_hdrinc(struct sock *sk, void *from, int length,
+static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
                        struct rtable *rt, 
                        unsigned int flags)
 {
@@ -298,7 +298,7 @@ static int raw_send_hdrinc(struct sock *
                goto error_fault;
 
        /* We don't modify invalid header */
-       if (length >= sizeof(*iph) && iph->ihl * 4 <= length) {
+       if (length >= sizeof(*iph) && iph->ihl * 4U <= length) {
                if (!iph->saddr)
                        iph->saddr = rt->rt_src;
                iph->check   = 0;