rpc: fix handling of SSH auth failure code

The result of libssh2_userauth_password is being assigned to 'ret' in
one branch and 'rc' in the other branch. Checks are all done against the
'ret' variable, so one branch never does the correct check.
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

src/rpc/virnetsshsession.c

@@ -706,9 +706,9 @@ virNetSSHAuthenticatePassword(virNetSSHSessionPtr sess,
 
     if (priv->password) {
         /* tunelled password authentication */
-        if ((ret = libssh2_userauth_password(sess->session,
-                                             priv->username,
-                                             priv->password)) == 0) {
+        if ((rc = libssh2_userauth_password(sess->session,
+                                            priv->username,
+                                            priv->password)) == 0) {
             ret = 0;
             goto cleanup;
         }
@@ -737,7 +737,7 @@ virNetSSHAuthenticatePassword(virNetSSHSessionPtr sess,
                 goto cleanup;
             }
 
-            if (ret != LIBSSH2_ERROR_AUTHENTICATION_FAILED)
+            if (rc != LIBSSH2_ERROR_AUTHENTICATION_FAILED)
                 break;
 
             VIR_FREE(password);
@@ -750,10 +750,10 @@ virNetSSHAuthenticatePassword(virNetSSHSessionPtr sess,
                    _("authentication failed: %s"), errmsg);
 
     /* determine exist status */
-    if (ret == LIBSSH2_ERROR_AUTHENTICATION_FAILED)
-        return 1;
+    if (rc == LIBSSH2_ERROR_AUTHENTICATION_FAILED)
+        ret = 1;
     else
-        return -1;
+        ret = -1;
 
  cleanup:
     VIR_FREE(password);