From: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Date: Mon, 17 Nov 2008 03:48:49 +0000 (-0800)
Subject: Phonet: refuse to send bigger than MTU packets
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ebfe92ca65c780334bdf847ddc4eca15835bd9c0;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git

Phonet: refuse to send bigger than MTU packets

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/phonet/af_phonet.c b/net/phonet/af_phonet.c
index defeb7a0d50..7ab30f668b5 100644
--- 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;
 	}