Commit ec2603b for zlib

commit ec2603b32d4d3ff9f681d4fb0fb03059ab935dc5
Author: Girma Metaferia <samuelgirmatgt@gmail.com>
Date:   Mon Aug 31 05:01:27 2026 -0400

    Reject a null dictionary in inflateSetDictionary().

diff --git a/inflate.c b/inflate.c
index d8bcab8..b9c3949 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1191,7 +1191,8 @@ int ZEXPORT inflateSetDictionary(z_streamp strm, const Bytef *dictionary,
     int ret;

     /* check state */
-    if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
+    if (inflateStateCheck(strm) || dictionary == Z_NULL)
+        return Z_STREAM_ERROR;
     state = (struct inflate_state FAR *)strm->state;
     if (state->wrap != 0 && state->mode != DICT)
         return Z_STREAM_ERROR;
diff --git a/test/infcover.c b/test/infcover.c
index f1ad0f9..d21257f 100644
--- a/test/infcover.c
+++ b/test/infcover.c
@@ -361,6 +361,9 @@ local void cover_support(void)
     ret = inflatePrime(&strm, -1, 0);           assert(ret == Z_OK);
     ret = inflateSetDictionary(&strm, Z_NULL, 0);
                                                 assert(ret == Z_STREAM_ERROR);
+    ret = inflateReset2(&strm, -15);            assert(ret == Z_OK);
+    ret = inflateSetDictionary(&strm, Z_NULL, 1);
+                                                assert(ret == Z_STREAM_ERROR);
     ret = inflateEnd(&strm);                    assert(ret == Z_OK);
     mem_done(&strm, "prime");