bridge: fix icmpv6 endian bug and other sparse warnings
Fix the warnings reported by sparse on recent bridge multicast
changes. Mostly just rcu annotation issues but in this case
sparse found a real bug! The ICMPv6 mld2 query mrc
values is in network byte order.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 977c3ee..1093c89 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -622,7 +622,7 @@
struct net_bridge_port_group *br_multicast_new_port_group(
struct net_bridge_port *port,
struct br_ip *group,
- struct net_bridge_port_group *next)
+ struct net_bridge_port_group __rcu *next)
{
struct net_bridge_port_group *p;
@@ -632,7 +632,7 @@
p->addr = *group;
p->port = port;
- p->next = next;
+ rcu_assign_pointer(p->next, next);
hlist_add_head(&p->mglist, &port->mglist);
setup_timer(&p->timer, br_multicast_port_group_expired,
(unsigned long)p);
@@ -1138,7 +1138,7 @@
struct sk_buff *skb)
{
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
- struct mld_msg *mld = (struct mld_msg *) icmp6_hdr(skb);
+ struct mld_msg *mld;
struct net_bridge_mdb_entry *mp;
struct mld2_query *mld2q;
struct net_bridge_port_group *p;
@@ -1165,6 +1165,7 @@
if (max_delay)
group = &mld->mld_mca;
} else if (skb->len >= sizeof(*mld2q)) {
+ u16 mrc;
if (!pskb_may_pull(skb, sizeof(*mld2q))) {
err = -EINVAL;
goto out;
@@ -1172,7 +1173,8 @@
mld2q = (struct mld2_query *)icmp6_hdr(skb);
if (!mld2q->mld2q_nsrcs)
group = &mld2q->mld2q_mca;
- max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(mld2q->mld2q_mrc) : 1;
+ mrc = ntohs(mld2q->mld2q_mrc);
+ max_delay = mrc ? MLDV2_MRC(mrc) : 1;
}
if (!group)