[FFmpeg-cvslog] avcodec/dxtory: Fix input size check in dxtory_decode_v1_420()

[Michael Niedermayer]

ffmpeg | branch: release/2.5 | Michael Niedermayer <michael at niedermayer.cc> | Sun Nov 15 00:25:11 2015 +0100| [f43b6a094c095a4f30735634e8411920307baa34] | committer: Michael Niedermayer

avcodec/dxtory: Fix input size check in dxtory_decode_v1_420()

Fixes out of array read
Fixes: c50c4aa6cefda71b19a31ea12302980c/asan_heap-oob_12be5fd_7011_33ebd015a74976215934add72b9c8352.avi

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 9caa9414ccf2dcf8aee2695377dee830a5024c82)

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f43b6a094c095a4f30735634e8411920307baa34
---

 libavcodec/dxtory.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/dxtory.c b/libavcodec/dxtory.c
index 91d87f0..bc3e838 100644
--- a/libavcodec/dxtory.c
+++ b/libavcodec/dxtory.c
@@ -108,7 +108,7 @@ static int dxtory_decode_v1_420(AVCodecContext *avctx, AVFrame *pic,
     uint8_t *Y1, *Y2, *U, *V;
     int ret;
 
-    if (src_size < avctx->width * avctx->height * 3LL / 2) {
+    if (src_size < FFALIGN(avctx->width, 2) * FFALIGN(avctx->height, 2) * 3LL / 2) {
         av_log(avctx, AV_LOG_ERROR, "packet too small\n");
         return AVERROR_INVALIDDATA;
     }