libblkid: Don't keep reading same sector of ISO

We were reading the same sector over and over again when parsing ISO9660.
This patches fixes it.

diff --git a/libblkid/src/superblocks/iso9660.c b/libblkid/src/superblocks/iso9660.c
index f7d2b760ab6952d3cb1ae60b1dca8f27665f81d4..33a8597ed6f1fa92ff92c51215ef7c11a7f3f77f 100644 (file)
--- a/libblkid/src/superblocks/iso9660.c
+++ b/libblkid/src/superblocks/iso9660.c
@@ -167,8 +167,10 @@ static int probe_iso9660(blkid_probe pr, const struct blkid_idmag *mag)
 
                if (iso == NULL || iso->vd_type == ISO_VD_END)
                        break;
-               if (iso->vd_type != ISO_VD_SUPPLEMENTARY)
+               if (iso->vd_type != ISO_VD_SUPPLEMENTARY) {
+                       off += ISO_SECTOR_SIZE;
                        continue;
+      }
 
                if (memcmp(iso->escape_sequences, "%/@", 3) == 0 ||
                    memcmp(iso->escape_sequences, "%/C", 3) == 0 ||