From 5705dc527687fd84d94c934169b6bd753459744f Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sat, 28 Feb 2015 21:57:11 +0100
Subject: [PATCH] avutil/imgutils: correctly check for negative SAR components

These could trigger assert failures previously

Found-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavutil/imgutils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index 07b494c38a..a8bc18d025 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -245,7 +245,7 @@ int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar)
 {
     int64_t scaled_dim;
 
-    if (!sar.den)
+    if (sar.den <= 0 || sar.num < 0)
         return AVERROR(EINVAL);
 
     if (!sar.num || sar.num == sar.den)