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-rw-r--r--src/3rdparty/zlib/src/inflate.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/3rdparty/zlib/src/inflate.c b/src/3rdparty/zlib/src/inflate.c
index 7be8c63662..2a3c4fe984 100644
--- a/src/3rdparty/zlib/src/inflate.c
+++ b/src/3rdparty/zlib/src/inflate.c
@@ -764,8 +764,9 @@ int flush;
if (copy > have) copy = have;
if (copy) {
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_len - state->length) <
+ state->head->extra_max) {
zmemcpy(state->head->extra + len, next,
len + copy > state->head->extra_max ?
state->head->extra_max - len : copy);