[FFmpeg-cvslog] avcodec/mjpegdec: Check for rgb before flipping

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 31 03:08:33 2016 +0100| [d5948243f51efea08bf27ac8f68845df79d55f57] | committer: Michael Niedermayer

avcodec/mjpegdec: Check for rgb before flipping

Fixes assertion failure due to unsupported case

Fixes: 356/fuzz-1-ffmpeg_VIDEO_AV_CODEC_ID_MJPEG_fuzzer
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 25d9643f1172ae6a210c671195ba3135895abaf3)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d5948243f51efea08bf27ac8f68845df79d55f57
---

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

diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 0645a1d..059c1c6 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -2383,7 +2383,7 @@ the_end:
             }
         }
     }
-    if (s->flipped) {
+    if (s->flipped && !s->rgb) {
         int j;
         avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
         av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));