[FFmpeg-cvslog] avcodec/m101: Fix off be 2 error

[Michael Niedermayer]

ffmpeg | branch: release/4.1 | Michael Niedermayer <michael at niedermayer.cc> | Mon Jun 17 21:13:17 2019 +0200| [f3bfb0717982992959ac4ecd40f4d2ddcab25eb1] | committer: Michael Niedermayer

avcodec/m101: Fix off be 2 error

Fixes: out of array read
Fixes: 15263/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_M101_fuzzer-5728999453491200

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 89b96900fa7c17d0770c9af26af7c3ae36ae0253)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=f3bfb0717982992959ac4ecd40f4d2ddcab25eb1
---

 libavcodec/m101.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/m101.c b/libavcodec/m101.c
index d2549668fd..70f1da4f45 100644
--- a/libavcodec/m101.c
+++ b/libavcodec/m101.c
@@ -61,7 +61,7 @@ static int m101_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
     stride = AV_RL32(avctx->extradata + 5*4);
 
     if (avctx->pix_fmt == AV_PIX_FMT_YUV422P10)
-        min_stride = (avctx->width + 15) / 16 * 20;
+        min_stride = (avctx->width + 15) / 16 * 40;
 
     if (stride < min_stride || avpkt->size < stride * (uint64_t)avctx->height) {
         av_log(avctx, AV_LOG_ERROR, "stride (%d) is invalid for packet sized %d\n",