[FFmpeg-cvslog] avcodec/msrle: use av_image_get_linesize() to calculate the linesize

[Michael Niedermayer]

ffmpeg | branch: release/1.0 | Michael Niedermayer <michaelni at gmx.at> | Sun Feb 16 23:08:52 2014 +0100| [54b61181ed55ab38034520eb27d18cf8a2d3732e] | committer: Michael Niedermayer

avcodec/msrle: use av_image_get_linesize() to calculate the linesize

Fixes out of array access
Fixes: 14a74a0a2dc67ede543f0e35d834fbbe-asan_heap-oob_49572c_556_cov_215466444_44_001_engine_room.mov
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit c919e1ca2ecfc47d796382973ba0e48b8f6f92a2)

Conflicts:

	libavcodec/msrle.c
(cherry picked from commit bc1c8ec5e65098fd2ccd8456f667151dfc9cda42)

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=54b61181ed55ab38034520eb27d18cf8a2d3732e
---

 libavcodec/msrle.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/msrle.c b/libavcodec/msrle.c
index 7c965d2..4f2d753 100644
--- a/libavcodec/msrle.c
+++ b/libavcodec/msrle.c
@@ -35,6 +35,7 @@
 #include "avcodec.h"
 #include "dsputil.h"
 #include "msrledec.h"
+#include "libavutil/imgutils.h"
 
 typedef struct MsrleContext {
     AVCodecContext *avctx;
@@ -112,7 +113,7 @@ static int msrle_decode_frame(AVCodecContext *avctx,
 
     /* FIXME how to correctly detect RLE ??? */
     if (avctx->height * istride == avpkt->size) { /* assume uncompressed */
-        int linesize = (avctx->width * avctx->bits_per_coded_sample + 7) / 8;
+        int linesize = av_image_get_linesize(avctx->pix_fmt, avctx->width, 0);
         uint8_t *ptr = s->frame.data[0];
         uint8_t *buf = avpkt->data + (avctx->height-1)*istride;
         int i, j;