commit 3a4141add108097fa548b196f5950c6663e1578e
Author: Tomas Korbar <tkorbar@redhat.com>
Date:   Thu Mar 3 13:50:20 2022 +0100

    CVE-2022-25315

diff --git a/lib/xmlparse.c b/lib/xmlparse.c
index f0061c8..45fda00 100644
--- a/lib/xmlparse.c
+++ b/lib/xmlparse.c
@@ -2508,6 +2508,7 @@ storeRawNames(XML_Parser parser)
   while (tag) {
     int bufSize;
     int nameLen = sizeof(XML_Char) * (tag->name.strLen + 1);
+    size_t rawNameLen;
     char *rawNameBuf = tag->buf + nameLen;
     /* Stop if already stored.  Since m_tagStack is a stack, we can stop
        at the first entry that has already been copied; everything
@@ -2519,7 +2520,11 @@ storeRawNames(XML_Parser parser)
     /* For re-use purposes we need to ensure that the
        size of tag->buf is a multiple of sizeof(XML_Char).
     */
-    bufSize = nameLen + ROUND_UP(tag->rawNameLength, sizeof(XML_Char));
+    rawNameLen = ROUND_UP(tag->rawNameLength, sizeof(XML_Char));
+    /* Detect and prevent integer overflow. */
+    if (rawNameLen > (size_t)INT_MAX - nameLen)
+      return XML_FALSE;
+    bufSize = nameLen + (int)rawNameLen;
     if (bufSize > tag->bufEnd - tag->buf) {
       char *temp = (char *)REALLOC(parser, tag->buf, bufSize);
       if (temp == NULL)