apparmor: differentiate between error and unconfined profiles

profile_status function was not making any difference between error
cases and unconfined profiles. The problem with this approach is that
dominfo was throwing an error on unconfined domains.

(cherry picked from commit a1bdf04b)

src/security/security_apparmor.c

@@ -66,10 +66,11 @@ struct SDPDOP {
 };
 
 /*
- * profile_status returns '-1' on error, '0' if loaded
+ * profile_status returns '-2' on error, '-1' if not loaded, '0' if loaded
  *
- * If check_enforcing is set to '1', then returns '-1' on error, '0' if
- * loaded in complain mode, and '1' if loaded in enforcing mode.
+ * If check_enforcing is set to '1', then returns '-2' on error, '-1' if
+ * not loaded, '0' if loaded in complain mode, and '1' if loaded in
+ * enforcing mode.
  */
 static int
 profile_status(const char *str, const int check_enforcing)
@@ -77,7 +78,7 @@ profile_status(const char *str, const int check_enforcing)
     char *content = NULL;
     char *tmp = NULL;
     char *etmp = NULL;
-    int rc = -1;
+    int rc = -2;
 
     /* create string that is '<str> \0' for accurate matching */
     if (virAsprintf(&tmp, "%s ", str) == -1)
@@ -100,6 +101,8 @@ profile_status(const char *str, const int check_enforcing)
 
     if (strstr(content, tmp) != NULL)
         rc = 0;
+    else
+        rc = -1; /* return -1 if not loaded */
     if (check_enforcing != 0) {
         if (rc == 0 && strstr(content, etmp) != NULL)
             rc = 1;                 /* return '1' if loaded and enforcing */
@@ -262,6 +265,9 @@ use_apparmor(void)
         goto cleanup;
 
     rc = profile_status(libvirt_daemon, 1);
+    /* Error or unconfined should all result in -1*/
+    if (rc < 0)
+        rc = -1;
 
  cleanup:
     VIR_FREE(libvirt_daemon);
@@ -517,23 +523,29 @@ AppArmorGetSecurityProcessLabel(virSecurityManagerPtr mgr ATTRIBUTE_UNUSED,
                                 virSecurityLabelPtr sec)
 {
     int rc = -1;
+    int status;
     char *profile_name = NULL;
 
     if ((profile_name = get_profile_name(def)) == NULL)
         return rc;
 
-    if (virStrcpy(sec->label, profile_name,
-        VIR_SECURITY_LABEL_BUFLEN) == NULL) {
+    status = profile_status(profile_name, 1);
+    if (status < -1) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       "%s", _("error copying profile name"));
+                       "%s", _("error getting profile status"));
         goto cleanup;
+    } else if (status == -1) {
+        profile_name[0] = '\0';
     }
 
-    if ((sec->enforcing = profile_status(profile_name, 1)) < 0) {
+    if (virStrcpy(sec->label, profile_name,
+        VIR_SECURITY_LABEL_BUFLEN) == NULL) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       "%s", _("error calling profile_status()"));
+                       "%s", _("error copying profile name"));
         goto cleanup;
     }
+
+    sec->enforcing = status == 1;
     rc = 0;
 
  cleanup: