From 088a6ad7b5ab5ea04af356ca8f6bb3183455eb66 Mon Sep 17 00:00:00 2001
From: Pierre Joye <pajoye@php.net>
Date: Wed, 8 Dec 2010 08:45:56 +0000
Subject: [PATCH] - Fix #53492, fix crash if aa steps are invalid

---
 ext/gd/gd.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ext/gd/gd.c b/ext/gd/gd.c
index f56299977e..8c7e6b1164 100644
--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -4290,6 +4290,11 @@ PHP_FUNCTION(imagepstext)
 		return;
 	}
 
+	if (aa_steps != 4 || aa_steps != 16) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "AA steps must be 4 or 16");
+		RETURN_FALSE;
+	}
+
 	ZEND_FETCH_RESOURCE(bg_img, gdImagePtr, &img, -1, "Image", le_gd);
 	ZEND_FETCH_RESOURCE(f_ind, int *, &fnt, -1, "Type 1 font", le_ps_font);
 
-- 
2.50.1