PERFORCE change 19932 for review

[Brian Feldman]

http://perforce.freebsd.org/chv.cgi?CH=19932

Change 19932 by green at green_laptop_2 on 2002/10/22 14:11:53

	* Improve commenting.
	* Allow a process to relabel itself as long as it maintains the
	  same SEBSD label.

Affected files ...

.. //depot/projects/trustedbsd/mac/sys/security/sebsd/sebsd.c#49 edit

Differences ...

==== //depot/projects/trustedbsd/mac/sys/security/sebsd/sebsd.c#49 (text+ko) ====

@@ -232,11 +232,20 @@
 	return;
 }
 
+/*
+ * SEBSD does not support the relabeling of processes without
+ * transitioning.
+ */
 static int
 sebsd_check_cred_relabel(struct ucred *cred, struct label *newlabel)
 {
-	printf("sebsd_check_cred_relabel:: This does nothing\n");
-	return EPERM;
+	struct task_security_struct *nsec, *tsec;
+
+	nsec = SLOT(newlabel);
+	tsec = SLOT(&cred->cr_label);
+	if (nsec != NULL && nsec->sid != tsec->sid)
+		return EPERM;
+	return 0;
 }
 
 static void
@@ -898,7 +907,7 @@
 	if (rc)
 		return (rc);
 	if (old_file->sclass == 0) {
-		printf("vnode_relabel_from:: ERROR, sid=%d, sclass=0, "
+		printf("vnode_rename_from:: ERROR, sid=%d, sclass=0, "
 		       "v_type=%d\n", old_file->sid, vp->v_type);
 		return 0; /* TBD: debugging */
 	}
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