From 3e2b745020c2dbf0201fe7df3dad9e7e0b2e1bb6 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Fri, 3 Oct 2014 17:35:58 +0200
Subject: [PATCH] avcodec/pngdec: Check bits per pixel before setting
 monoblack pixel format

(Upstream commit 3e2b745020c2dbf0201fe7df3dad9e7e0b2e1bb6)

Fixes out of array accesses
Fixes: asan_heap-oob_14dbfcf_4_asan_heap-oob_1ce5767_179_add_method_small.png

Upstream-Status: Backport

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Yue Tao <yue.tao@windriver.com>
---
 libavcodec/pngdec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index da91aab..f3603b3 100644
--- a/gst-libs/ext/libav/libavcodec/pngdec.c
+++ b/gst-libs/ext/libav/libavcodec/pngdec.c
@@ -481,7 +481,7 @@ static int decode_frame(AVCodecContext *avctx,
                 } else if (s->bit_depth == 16 &&
                            s->color_type == PNG_COLOR_TYPE_RGB) {
                     avctx->pix_fmt = PIX_FMT_RGB48BE;
-                } else if (s->bit_depth == 1 &&
+                } else if (s->bit_depth == 1 && s->bits_per_pixel == 1 &&
                            s->color_type == PNG_COLOR_TYPE_GRAY) {
                     avctx->pix_fmt = PIX_FMT_MONOBLACK;
                 } else if (s->color_type == PNG_COLOR_TYPE_PALETTE) {
-- 
1.7.9.5