inet: Sanitize inet{,6} protocol demux.
Don't pretend that inet_protos[] and inet6_protos[] are hashes, thay
are just a straight arrays. Remove all unnecessary hash masking.
Document MAX_INET_PROTOS.
Use RAW_HTABLE_SIZE when appropriate.
Reported-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index e1caa1a..49a74cc 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -637,12 +637,12 @@
static void icmp_unreach(struct sk_buff *skb)
{
+ const struct net_protocol *ipprot;
const struct iphdr *iph;
struct icmphdr *icmph;
- int hash, protocol;
- const struct net_protocol *ipprot;
- u32 info = 0;
struct net *net;
+ u32 info = 0;
+ int protocol;
net = dev_net(skb_dst(skb)->dev);
@@ -731,9 +731,8 @@
*/
raw_icmp_error(skb, protocol, info);
- hash = protocol & (MAX_INET_PROTOS - 1);
rcu_read_lock();
- ipprot = rcu_dereference(inet_protos[hash]);
+ ipprot = rcu_dereference(inet_protos[protocol]);
if (ipprot && ipprot->err_handler)
ipprot->err_handler(skb, info);
rcu_read_unlock();