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Phonet: refuse to send bigger than MTU packets
author
Rémi Denis-Courmont
<remi.denis-courmont@nokia.com>
Mon, 17 Nov 2008 03:48:49 +0000
(19:48 -0800)
committer
David S. Miller
<davem@davemloft.net>
Mon, 17 Nov 2008 03:48:49 +0000
(19:48 -0800)
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/phonet/af_phonet.c
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diff --git
a/net/phonet/af_phonet.c
b/net/phonet/af_phonet.c
index
defeb7a
..
7ab30f6
100644
(file)
--- a/
net/phonet/af_phonet.c
+++ b/
net/phonet/af_phonet.c
@@
-144,8
+144,8
@@
static int pn_send(struct sk_buff *skb, struct net_device *dev,
struct phonethdr *ph;
int err;
- if (skb->len + 2 > 0xffff
) {
- /* Phonet length field would overflow */
+ if (skb->len + 2 > 0xffff
/* Phonet length field limit */ ||
+ skb->len + sizeof(struct phonethdr) > dev->mtu) {
err = -EMSGSIZE;
goto drop;
}