1 files changed, 40 insertions, 10 deletions

diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index c65762823f5e..201cbac2b32c 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -122,7 +122,11 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
 	switch (skb->protocol) {
 	case htons(ETH_P_IP):
 	{
-		const struct iphdr *iph = ip_hdr(skb);
+		const struct iphdr *iph;
+
+		if (!pskb_network_may_pull(skb, sizeof(*iph)))
+			goto err;
+		iph = ip_hdr(skb);
 		h = (__force u32)iph->daddr;
 		h2 = (__force u32)iph->saddr ^ iph->protocol;
 		if (!(iph->frag_off&htons(IP_MF|IP_OFFSET)) &&
@@ -131,25 +135,32 @@ static unsigned sfq_hash(struct sfq_sched_data *q, struct sk_buff *skb)
 		     iph->protocol == IPPROTO_UDPLITE ||
 		     iph->protocol == IPPROTO_SCTP ||
 		     iph->protocol == IPPROTO_DCCP ||
-		     iph->protocol == IPPROTO_ESP))
+		     iph->protocol == IPPROTO_ESP) &&
+		     pskb_network_may_pull(skb, iph->ihl * 4 + 4))
 			h2 ^= *(((u32*)iph) + iph->ihl);
 		break;
 	}
 	case htons(ETH_P_IPV6):
 	{
-		struct ipv6hdr *iph = ipv6_hdr(skb);
+		struct ipv6hdr *iph;
+
+		if (!pskb_network_may_pull(skb, sizeof(*iph)))
+			goto err;
+		iph = ipv6_hdr(skb);
 		h = (__force u32)iph->daddr.s6_addr32[3];
 		h2 = (__force u32)iph->saddr.s6_addr32[3] ^ iph->nexthdr;
-		if (iph->nexthdr == IPPROTO_TCP ||
-		    iph->nexthdr == IPPROTO_UDP ||
-		    iph->nexthdr == IPPROTO_UDPLITE ||
-		    iph->nexthdr == IPPROTO_SCTP ||
-		    iph->nexthdr == IPPROTO_DCCP ||
-		    iph->nexthdr == IPPROTO_ESP)
+		if ((iph->nexthdr == IPPROTO_TCP ||
+		     iph->nexthdr == IPPROTO_UDP ||
+		     iph->nexthdr == IPPROTO_UDPLITE ||
+		     iph->nexthdr == IPPROTO_SCTP ||
+		     iph->nexthdr == IPPROTO_DCCP ||
+		     iph->nexthdr == IPPROTO_ESP) &&
+		    pskb_network_may_pull(skb, sizeof(*iph) + 4))
 			h2 ^= *(u32*)&iph[1];
 		break;
 	}
 	default:
+err:
 		h = (unsigned long)skb_dst(skb) ^ (__force u32)skb->protocol;
 		h2 = (unsigned long)skb->sk;
 	}
@@ -323,7 +334,7 @@ sfq_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 	if (++sch->q.qlen <= q->limit) {
 		sch->bstats.bytes += qdisc_pkt_len(skb);
 		sch->bstats.packets++;
-		return 0;
+		return NET_XMIT_SUCCESS;
 	}
 
 	sfq_drop(sch);
@@ -497,11 +508,26 @@ nla_put_failure:
 	return -1;
 }
 
+static struct Qdisc *sfq_leaf(struct Qdisc *sch, unsigned long arg)
+{
+	return NULL;
+}
+
 static unsigned long sfq_get(struct Qdisc *sch, u32 classid)
 {
 	return 0;
 }
 
+static unsigned long sfq_bind(struct Qdisc *sch, unsigned long parent,
+			      u32 classid)
+{
+	return 0;
+}
+
+static void sfq_put(struct Qdisc *q, unsigned long cl)
+{
+}
+
 static struct tcf_proto **sfq_find_tcf(struct Qdisc *sch, unsigned long cl)
 {
 	struct sfq_sched_data *q = qdisc_priv(sch);
@@ -554,8 +580,12 @@ static void sfq_walk(struct Qdisc *sch, struct qdisc_walker *arg)
 }
 
 static const struct Qdisc_class_ops sfq_class_ops = {
+	.leaf		=	sfq_leaf,
 	.get		=	sfq_get,
+	.put		=	sfq_put,
 	.tcf_chain	=	sfq_find_tcf,
+	.bind_tcf	=	sfq_bind,
+	.unbind_tcf	=	sfq_put,
 	.dump		=	sfq_dump_class,
 	.dump_stats	=	sfq_dump_class_stats,
 	.walk		=	sfq_walk,