From: Nikita Popov <nikita.ppv@gmail.com>
Date: Wed, 19 Jun 2019 13:41:45 +0000 (+0200)
Subject: Fix buffer underflow in gd_gif_in.c
X-Git-Tag: php-7.4.0alpha2~51^2~4
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2a9fc310211eb0ed5ee2b2954a57c49c17c7e6a7;p=php

Fix buffer underflow in gd_gif_in.c

This has been fixed upstream in
https://github.com/libgd/libgd/commit/939d49a3a9d1cbcd2a37cea9eac9f9e5e9f9de78.
---

diff --git a/ext/gd/libgd/gd_gif_in.c b/ext/gd/libgd/gd_gif_in.c
index ee987e8199..1f69723610 100644
--- a/ext/gd/libgd/gd_gif_in.c
+++ b/ext/gd/libgd/gd_gif_in.c
@@ -381,7 +381,7 @@ GetCode_(gdIOCtx *fd, CODE_STATIC_DATA *scd, int code_size, int flag, int *ZeroD
 	if (flag) {
 		scd->curbit = 0;
 		scd->lastbit = 0;
-		scd->last_byte = 0;
+		scd->last_byte = 2;
 		scd->done = FALSE;
 		return 0;
 	}