From 7ace008f969df177efa9e6abc7437e2ac1ea2e50 Mon Sep 17 00:00:00 2001
From: Suzy Wang <suzy.wang@ibm.com>
Date: Mon, 6 Jun 2022 13:04:13 -0700
Subject: [PATCH] Zlib patch: prevent uninitialized use of state->check

---
 inflate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/inflate.c b/inflate.c
index 5777dbb7e7..03d92b43a5 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1295,6 +1295,8 @@ int32_t Z_EXPORT PREFIX(inflateSync)(PREFIX3(stream) *strm) {
     /* return no joy or set up to restart inflate() on a new block */
     if (state->have != 4)
         return Z_DATA_ERROR;
+    if (state->mode == HEAD)
+        state->wrap = 0;
     if (state->flags == -1)
         state->wrap = 0;    /* if no header yet, treat as raw */
     else