libblkid: udf: Stop scanning Volume Descriptors after we found Terminating Descriptor

Terminating Descriptor is the last descriptor in Volume Descriptor
Sequence. After it there can be unrecorded or empty sectors which we do not
have to scan.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>

diff --git a/libblkid/src/superblocks/udf.c b/libblkid/src/superblocks/udf.c
index bc7273ca536dca8d0aa183f9baf48f72320c2e3d..7f98a15f831620c664a13418149d3a8d67532788 100644 (file)
--- a/libblkid/src/superblocks/udf.c
+++ b/libblkid/src/superblocks/udf.c
@@ -94,6 +94,7 @@ struct volume_descriptor {
 #define TAG_ID_PVD  1
 #define TAG_ID_AVDP 2
 #define TAG_ID_LVD  6
+#define TAG_ID_TD   8
 #define TAG_ID_LVID 9
 
 struct volume_structure_descriptor {
@@ -290,6 +291,8 @@ real_blksz:
                        break;
                if (le32_to_cpu(vd->tag.location) != loc + b)
                        break;
+               if (type == TAG_ID_TD)
+                       break;
                if (type == TAG_ID_PVD) {
                        if (!have_volid) {
                                int enc = udf_cid_to_enc(vd->type.primary.ident.cid);