[FFmpeg-cvslog] avcodec/mjpegdec: Limit bayer to single plane outputting format

[Michael Niedermayer]

ffmpeg | branch: release/4.3 | Michael Niedermayer <michael at niedermayer.cc> | Sat Jul  4 14:15:01 2020 +0200| [11a10e30a92986a4666ea831976c44f9ebb4de71] | committer: Michael Niedermayer

avcodec/mjpegdec: Limit bayer to single plane outputting format

This reduces the number of paths reachable with DNG and should
improve security

Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 865a34970e73b9c23e33fd6dc6ba046d4e821519)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=11a10e30a92986a4666ea831976c44f9ebb4de71
---

 libavcodec/mjpegdec.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index cb5e2a9b9b..e7a4e08c1c 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -499,6 +499,11 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
             }
         }
 
+        if (s->bayer) {
+            if (pix_fmt_id != 0x11110000 && pix_fmt_id != 0x11000000)
+                goto unk_pixfmt;
+        }
+
         switch (pix_fmt_id) {
         case 0x11110000: /* for bayer-encoded huffman lossless JPEGs embedded in DNGs */
             if (!s->bayer)