From 39f3b9505feed0bc0b04396810b23b2ae3732571 Mon Sep 17 00:00:00 2001
From: npt-1707 <npthanh132@gmail.com>
Date: Thu, 8 May 2025 03:23:44 +0800
Subject: [PATCH] assimp/contrib/zlib/inflate.c: Fix a bug when getting a gzip
 header extra field with inflate().

---
 assimp/contrib/zlib/inflate.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/assimp/contrib/zlib/inflate.c b/assimp/contrib/zlib/inflate.c
index 575fcdf8..82abd377 100644
--- a/assimp/contrib/zlib/inflate.c
+++ b/assimp/contrib/zlib/inflate.c
@@ -758,9 +758,10 @@ int flush;
                 copy = state->length;
                 if (copy > have) copy = have;
                 if (copy) {
+                    len = state->head->extra_len - state->length;
                     if (state->head != Z_NULL &&
-                        state->head->extra != Z_NULL) {
-                        len = state->head->extra_len - state->length;
+                        state->head->extra != Z_NULL &&
+                        len < state->head->extra_max) {
                         zmemcpy(state->head->extra + len, next,
                                 len + copy > state->head->extra_max ?
                                 state->head->extra_max - len : copy);