diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index 332ac8a80cf5b62c77bff350f6a92698d76a8e0f..2df7b900e25965828ed91e3bd376340a672d9c0f 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -17,6 +17,7 @@
 #include <linux/inet_diag.h>
 #include <linux/xfrm.h>
 #include <linux/audit.h>
+#include <linux/sock_diag.h>
 
 #include "flask.h"
 #include "av_permissions.h"
@@ -78,6 +79,7 @@ static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
 {
 	{ TCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 	{ DCCPDIAG_GETSOCK,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
+	{ SOCK_DIAG_BY_FAMILY,	NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
 };
 
 static struct nlmsg_perm nlmsg_xfrm_perms[] =
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index c93c21127f0cc5b6bc55c2930fdfe2441dc2a19c..5d0144ee8ed6d58e1f75043edcd7995cf1ca3a0e 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -1232,6 +1232,10 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
 	struct context context;
 	int rc = 0;
 
+	/* An empty security context is never valid. */
+	if (!scontext_len)
+		return -EINVAL;
+
 	if (!ss_initialized) {
 		int i;