From: Mark Adler <madler@alumni.caltech.edu>
Date: Mon, 29 Jan 2024 03:26:17 +0000 (-0800)
Subject: Fix bug in inflateSync() for data held in bit buffer.
X-Git-Tag: 2.2.0~97
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4c236c4f0eb23ebf58da6786c43e1a60a30443a;p=thirdparty%2Fzlib-ng.git

Fix bug in inflateSync() for data held in bit buffer.

madler/zlib#5af7cef45eeef86ddf6ab00b4e363c1eecaf47b6
---

diff --git a/inflate.c b/inflate.c
index 37104e6e..0b86cc1d 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1269,7 +1269,7 @@ int32_t Z_EXPORT PREFIX(inflateSync)(PREFIX3(stream) *strm) {
     /* if first time, start search in bit buffer */
     if (state->mode != SYNC) {
         state->mode = SYNC;
-        state->hold <<= state->bits & 7;
+        state->hold >>= state->bits & 7;
         state->bits -= state->bits & 7;
         len = 0;
         while (state->bits >= 8) {