[FFmpeg-cvslog] avcodec/pafvideo: Fix assertion failure

[Michael Niedermayer]

ffmpeg | branch: release/3.1 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jun  6 16:21:37 2017 +0200| [fb1d3fb1e5afacafff805a0e948c5cd3a4290ba5] | committer: Michael Niedermayer

avcodec/pafvideo: Fix assertion failure

Fixes: 2100/clusterfuzz-testcase-minimized-4522961547558912

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 c4360559ee2a6c8c624f24fc7e2a1cf00972ba68)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fb1d3fb1e5afacafff805a0e948c5cd3a4290ba5
---

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

diff --git a/libavcodec/pafvideo.c b/libavcodec/pafvideo.c
index 1618a3e7c3..91bfe16376 100644
--- a/libavcodec/pafvideo.c
+++ b/libavcodec/pafvideo.c
@@ -273,7 +273,7 @@ static int paf_video_decode(AVCodecContext *avctx, void *data,
     bytestream2_init(&c->gb, pkt->data, pkt->size);
 
     code = bytestream2_get_byte(&c->gb);
-    if ((code & 0xF) > 4) {
+    if ((code & 0xF) > 4 || (code & 0xF) == 3) {
         avpriv_request_sample(avctx, "unknown/invalid code");
         return AVERROR_INVALIDDATA;
     }