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lavu/imgutils: add consistency checks to av_image_copy_plane()

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

Avoid to silently corrupt memory.
This commit is contained in:
Stefano Sabatini
2012-09-08 00:31:41 +02:00
parent 26c531cc22
commit 252746d052
3 changed files with 7 additions and 1 deletions
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3
libavutil/imgutils.c
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@@ -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;

3
libavutil/imgutils.h
View File

@@ -99,6 +99,9 @@ int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
* The first byte of each successive line is separated by *_linesize
* bytes.
*
* bytewidth must be contained by both absolute values of dst_linesize
* and src_linesize, otherwise the function behavior is undefined.
*
* @param dst_linesize linesize for the image plane in dst
* @param src_linesize linesize for the image plane in src
*/

2
libavutil/version.h
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@@ -76,7 +76,7 @@
#define LIBAVUTIL_VERSION_MAJOR 52
#define LIBAVUTIL_VERSION_MINOR 9
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_MICRO 101
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \