From 7304fe4681634a8e0511a5922c972aa132ffb43d Mon Sep 17 00:00:00 2001 From: Duan Jiong Date: Thu, 31 Jul 2014 17:54:32 +0800 Subject: 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 Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/ipv6/icmp.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'net/ipv6/icmp.c') 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); } /* -- cgit v1.2.3-55-g7522