From 721b96ef902112c6d41db119ccc3129156714628 Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Mon, 18 Sep 2017 14:23:41 -0500
Subject: [PATCH] [libpng16] zero out memory allocated by png_inflate

---
 pngrutil.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pngrutil.c b/pngrutil.c
index 9dc8825f1..95e2b81c8 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -670,6 +670,10 @@ png_decompress_chunk(png_structrp png_ptr,
                    (terminate != 0);
                png_bytep text = png_voidcast(png_bytep, png_malloc_base(png_ptr,
                    buffer_size));
+               /* attempt to stop an oss-fuzz "use of uninitialized value"
+                * in png_set_text_2()
+                */
+               memset(text, 0, buffer_size);
 
                if (text != NULL)
                {