From: tb <tb@openbsd.org>
Date: Tue, 9 Aug 2022 07:38:25 +0000 (+0000)
Subject: Pull in inflateGetHeader() buffer overflow fix
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=326d7d446d6111cb9e0659996a9a7f2687cfdb1e;p=openbsd

Pull in inflateGetHeader() buffer overflow fix
---

diff --git a/gnu/usr.bin/perl/cpan/Compress-Raw-Zlib/zlib-src/inflate.c b/gnu/usr.bin/perl/cpan/Compress-Raw-Zlib/zlib-src/inflate.c
index d5369c275a2..2060956978a 100644
--- a/gnu/usr.bin/perl/cpan/Compress-Raw-Zlib/zlib-src/inflate.c
+++ b/gnu/usr.bin/perl/cpan/Compress-Raw-Zlib/zlib-src/inflate.c
@@ -761,8 +761,9 @@ int ZEXPORT inflate(
                 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);