[FFmpeg-cvslog] avcodec/ituh263dec: Use 0xffff as error code in h263p_decode_umotion()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Tue Feb 28 22:07:37 2017 +0100| [12c3e120fe8f8d6881001eade390d8a5c185783d] | committer: Michael Niedermayer

avcodec/ituh263dec: Use 0xffff as error code in h263p_decode_umotion()

This matches ff_h263_decode_motion() both functions error codes are interpreted by the same common code

Fixes: 690/clusterfuzz-testcase-4744944981901312

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=12c3e120fe8f8d6881001eade390d8a5c185783d
---

 libavcodec/ituh263dec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index e393388..edb6886 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -305,7 +305,7 @@ static int h263p_decode_umotion(MpegEncContext * s, int pred)
       code += get_bits1(&s->gb);
       if (code >= 32768) {
           avpriv_request_sample(s->avctx, "Huge DMV");
-          return AVERROR_INVALIDDATA;
+          return 0xffff;
       }
    }
    sign = code & 1;