Index: uspace/app/mkmfs/mkmfs.c
===================================================================
--- uspace/app/mkmfs/mkmfs.c	(revision fc22069bde020238acd12a7eb6194ef878fc7e34)
+++ uspace/app/mkmfs/mkmfs.c	(revision 2f2dd126ebb05a78c169dcb2e64e9f8a9111fde2)
@@ -640,6 +640,8 @@
 	zbmap_buf = malloc(zbmap_nblocks * sb->block_size);
 
-	if (!ibmap_buf || !zbmap_buf)
-		return ENOMEM;
+	if (!ibmap_buf || !zbmap_buf) {
+		rc = ENOMEM;
+		goto exit;
+	}
 
 	memset(ibmap_buf, 0xFF, ibmap_nblocks * sb->block_size);
@@ -671,4 +673,5 @@
 	}
 
+exit:
 	free(ibmap_buf);
 	free(zbmap_buf);