sctp: Make the mib per network namespace

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 6c85564..7c2df9c 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -257,7 +257,7 @@
 	offset = 0;
 
 	if ((whole > 1) || (whole && over))
-		SCTP_INC_STATS_USER(SCTP_MIB_FRAGUSRMSGS);
+		SCTP_INC_STATS_USER(sock_net(asoc->base.sk), SCTP_MIB_FRAGUSRMSGS);
 
 	/* Create chunks for all the full sized DATA chunks. */
 	for (i=0, len=first_len; i < whole; i++) {