selinux: Print 'sclass' as string when unrecognized netlink message occurs

This prints the 'sclass' field as string instead of index in unrecognized netlink message.
The textual representation makes it easier to distinguish the right class.
Signed-off-by: NMarek Milkovic <mmilkovi@redhat.com>
Acked-by: NStephen Smalley <sds@tycho.nsa.gov>
[PM: 80-char width fixes]
Signed-off-by: NPaul Moore <pmoore@redhat.com>

security/selinux/hooks.c

@@ -4713,8 +4713,9 @@ static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
 		if (err == -EINVAL) {
 			printk(KERN_WARNING
 			       "SELinux: unrecognized netlink message:"
-			       " protocol=%hu nlmsg_type=%hu sclass=%hu\n",
-			       sk->sk_protocol, nlh->nlmsg_type, sksec->sclass);
+			       " protocol=%hu nlmsg_type=%hu sclass=%s\n",
+			       sk->sk_protocol, nlh->nlmsg_type,
+			       secclass_map[sksec->sclass - 1].name);
 			if (!selinux_enforcing || security_get_allow_unknown())
 				err = 0;
 		}