From: Eric Biggers <ebiggers3@gmail.com>
Date: Sat, 24 Oct 2015 20:38:04 +0000 (-0500)
Subject: write.c: correctly handle no existing blob table during overwrite
X-Git-Tag: v1.8.3~25
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=73a7d1f3f221e03a3c244a0fd91042c7b5bd8245

write.c: correctly handle no existing blob table during overwrite
---

diff --git a/src/write.c b/src/write.c
index 930c61b1..f3308a24 100644
--- a/src/write.c
+++ b/src/write.c
@@ -3110,8 +3110,11 @@ overwrite_wim_inplace(WIMStruct *wim, int write_flags, unsigned num_threads)
 		 * this data would be overwritten.  */
 		old_xml_begin = wim->hdr.xml_data_reshdr.offset_in_wim;
 		old_xml_end = old_xml_begin + wim->hdr.xml_data_reshdr.size_in_wim;
-		old_blob_table_end = wim->hdr.blob_table_reshdr.offset_in_wim +
-				     wim->hdr.blob_table_reshdr.size_in_wim;
+		if (wim->hdr.blob_table_reshdr.offset_in_wim == 0)
+			old_blob_table_end = WIM_HEADER_DISK_SIZE;
+		else
+			old_blob_table_end = wim->hdr.blob_table_reshdr.offset_in_wim +
+					     wim->hdr.blob_table_reshdr.size_in_wim;
 		if (wim_has_integrity_table(wim) &&
 		    wim->hdr.integrity_table_reshdr.offset_in_wim < old_xml_end) {
 			WARNING("Didn't expect the integrity table to be "