commit 1707cc914729121d784b444ce64cbea791f8c2e8
Author: root <root@rhel6.(none)>
Date:   Thu Apr 29 09:56:51 2010 -0400

    linux-2.6-524-peercred.patch

diff --git a/include/linux/socket.h b/include/linux/socket.h
index 3273a0c..251b1b1 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -292,6 +292,8 @@ struct ucred {
 #define SOL_RDS		276
 #define SOL_IUCV	277
 
+#define SO_SETXID	SO_PEERCRED
+
 /* IPX options */
 #define IPX_TYPE	1
 
diff --git a/net/core/sock.c b/net/core/sock.c
index ac135b9..3d808cc 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -542,6 +542,7 @@ set_sndbuf:
 		}
 		sk->sk_xid = val;
 		sk->sk_nid = val;
+		sk->sk_peercred.uid = sk->sk_peercred.gid = val;
 		break;
 
 	case SO_RCVBUF: