From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Tue, 2 Jun 2020 16:02:07 +0000 (-0700)
Subject: Cast distance code to uint64_t before shifting in zng_emit_dist.
X-Git-Tag: 1.9.9-b1~236
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2473943ecc07068ce31542f9dbcf3d099ef4700b;p=thirdparty%2Fzlib-ng.git

Cast distance code to uint64_t before shifting in zng_emit_dist.
---

diff --git a/trees_emit.h b/trees_emit.h
index 30613f70..4cb17db8 100644
--- a/trees_emit.h
+++ b/trees_emit.h
@@ -144,7 +144,7 @@ static inline uint32_t zng_emit_dist(deflate_state *s, const ct_data *ltree, con
     send_code_trace(s, code);
 
     /* Send the distance code */
-    match_bits |= (dtree[code].Code << match_bits_len);
+    match_bits |= ((uint64_t)dtree[code].Code << match_bits_len);
     match_bits_len += dtree[code].Len;
     extra = extra_dbits[code];
     if (extra != 0) {