From 252746d052652b48f7bc0652e7c1601b1e997d9c Mon Sep 17 00:00:00 2001
From: Stefano Sabatini <stefasab@gmail.com>
Date: Sat, 8 Sep 2012 00:31:41 +0200
Subject: lavu/imgutils: add consistency checks to av_image_copy_plane()

Add assertions and abort in case of invalid |dst_linesize| < bytewidth or
|src_linesize| < bytewidth.

Avoid to silently corrupt memory.
---
 libavutil/imgutils.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libavutil/imgutils.c')

diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index 8595ba1bbf..3060b0705f 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -21,6 +21,7 @@
  * misc image utilities
  */
 
+#include "avassert.h"
 #include "common.h"
 #include "imgutils.h"
 #include "internal.h"
@@ -244,6 +245,8 @@ void av_image_copy_plane(uint8_t       *dst, int dst_linesize,
 {
     if (!dst || !src)
         return;
+    av_assert0(abs(src_linesize) >= bytewidth);
+    av_assert0(abs(dst_linesize) >= bytewidth);
     for (;height > 0; height--) {
         memcpy(dst, src, bytewidth);
         dst += dst_linesize;
-- 
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