[Rpm-maint] [rpm-software-management/rpm] Use int64_t for lengths (#1492)

[Demi Marie Obenour]

@DemiMarie commented on this pull request.



> @@ -467,15 +468,14 @@ static int dataLength(rpm_tagtype_t type, rpm_constdata_t p, rpm_count_t count,
 	break;
 
     default:
-	if (typeSizes[type] == -1)
-	    return -1;
-	length = typeSizes[(type & 0xf)] * count;
-	if (length < 0 || (se && (s + length) > se))
+	/* this won’t overflow, since ‘long_count’ is 64-bit */
+	length = typeSizes[type] * long_count;
+	if (length <= 0 || (se && length > se - s))

I went with making `typeSizes` 64-bit, which will help prevent similar problems elsewhere.

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/rpm-software-management/rpm/pull/1492#discussion_r579012812
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rpm.org/pipermail/rpm-maint/attachments/20210219/92de9708/attachment.html>