udp: Fix the SNMP counter of UDP_MIB_INERRORS

UDP packets received in udpv6_recvmsg() are not only IPv6 UDP packets, but
also have IPv4 UDP packets, so when do the counter of UDP_MIB_INERRORS in
udpv6_recvmsg(), we should check whether the packet is a IPv6 UDP packet
or a IPv4 UDP packet.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 18696af106d..8b48512ebf6 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -236,8 +236,14 @@ out:
 
 csum_copy_err:
         lock_sock(sk);
-        if (!skb_kill_datagram(sk, skb, flags))
-                UDP6_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
+        if (!skb_kill_datagram(sk, skb, flags)) {
+                if (is_udp4)
+                        UDP_INC_STATS_USER(sock_net(sk),
+                                        UDP_MIB_INERRORS, is_udplite);
+                else
+                        UDP6_INC_STATS_USER(sock_net(sk),
+                                        UDP_MIB_INERRORS, is_udplite);
+        }
         release_sock(sk);
 
         if (flags & MSG_DONTWAIT)