From: Mika Lindqvist <postmaster@raasu.org>
Date: Wed, 26 Apr 2023 16:28:43 +0000 (+0300)
Subject: Fix potential overflow before widening in makecrtc.
X-Git-Tag: 2.1.0-beta1~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d5d0a2bafb4314b4310577824b5a949058db404;p=thirdparty%2Fzlib-ng.git

Fix potential overflow before widening in makecrtc.
---

diff --git a/tools/makecrct.c b/tools/makecrct.c
index b5469b7d3..5c3ba58a1 100644
--- a/tools/makecrct.c
+++ b/tools/makecrct.c
@@ -93,7 +93,7 @@ static void braid(uint32_t ltl[][256], z_word_t big[][256], int n, int w) {
     int k;
     uint32_t i, p, q;
     for (k = 0; k < w; k++) {
-        p = x2nmodp((n * w + 3 - k) << 3, 0);
+        p = x2nmodp(((z_off64_t)n * w + 3 - k) << 3, 0);
         ltl[k][0] = 0;
         big[w - 1 - k][0] = 0;
         for (i = 1; i < 256; i++) {