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

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Sat Dec 31 03:08:33 2016 +0100| [8be687a81f9beb818f0ddf44491ba259f1dcca1b] | 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=8be687a81f9beb818f0ddf44491ba259f1dcca1b
---

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

diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index adc2597..6587931 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -2308,7 +2308,7 @@ the_end:
             }
         }
     }
-    if (s->flipped) {
+    if (s->flipped && !s->rgb) {
         int j;
         avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
         for (index=0; index<4; index++) {