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authorDuan Jiong <duanj.fnst@cn.fujitsu.com>2014-07-31 13:54:32 +0400
committerDavid S. Miller <davem@davemloft.net>2014-08-01 09:04:18 +0400
commit7304fe4681634a8e0511a5922c972aa132ffb43d (patch)
tree97d39043b738e7cd135efcd242dc2430919da2da /net/ipv6
parent299ee123e19889d511092347f5fc14db0f10e3a6 (diff)
downloadlinux-7304fe4681634a8e0511a5922c972aa132ffb43d.tar.xz
net: fix the counter ICMP_MIB_INERRORS/ICMP6_MIB_INERRORS
When dealing with ICMPv[46] Error Message, function icmp_socket_deliver() and icmpv6_notify() do some valid checks on packet's length, but then some protocols check packet's length redaudantly. So remove those duplicated statements, and increase counter ICMP_MIB_INERRORS/ICMP6_MIB_INERRORS in function icmp_socket_deliver() and icmpv6_notify() respectively. In addition, add missed counter in udp6/udplite6 when socket is NULL. Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/icmp.c13
-rw-r--r--net/ipv6/udp.c8
2 files changed, 14 insertions, 7 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index f6c84a6eb238..06ba3e58320b 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -626,9 +626,10 @@ void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
int inner_offset;
__be16 frag_off;
u8 nexthdr;
+ struct net *net = dev_net(skb->dev);
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
- return;
+ goto out;
nexthdr = ((struct ipv6hdr *)skb->data)->nexthdr;
if (ipv6_ext_hdr(nexthdr)) {
@@ -636,14 +637,14 @@ void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
inner_offset = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
&nexthdr, &frag_off);
if (inner_offset<0)
- return;
+ goto out;
} else {
inner_offset = sizeof(struct ipv6hdr);
}
/* Checkin header including 8 bytes of inner protocol header. */
if (!pskb_may_pull(skb, inner_offset+8))
- return;
+ goto out;
/* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
Without this we will not able f.e. to make source routed
@@ -652,13 +653,15 @@ void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
--ANK (980726)
*/
- rcu_read_lock();
ipprot = rcu_dereference(inet6_protos[nexthdr]);
if (ipprot && ipprot->err_handler)
ipprot->err_handler(skb, NULL, type, code, inner_offset, info);
- rcu_read_unlock();
raw6_icmp_error(skb, nexthdr, type, code, inner_offset, info);
+ return;
+
+out:
+ ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
}
/*
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 5b6091de5868..c6941a1ac977 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -533,11 +533,15 @@ void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
struct udphdr *uh = (struct udphdr*)(skb->data+offset);
struct sock *sk;
int err;
+ struct net *net = dev_net(skb->dev);
- sk = __udp6_lib_lookup(dev_net(skb->dev), daddr, uh->dest,
+ sk = __udp6_lib_lookup(net, daddr, uh->dest,
saddr, uh->source, inet6_iif(skb), udptable);
- if (sk == NULL)
+ if (sk == NULL) {
+ ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),
+ ICMP6_MIB_INERRORS);
return;
+ }
if (type == ICMPV6_PKT_TOOBIG) {
if (!ip6_sk_accept_pmtu(sk))