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avcodec/msmpeg4dec: Check for input end in msmpeg4v34_decode_mb()

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Fixes: Timeout
Fixes: 6276/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV1_fuzzer-5881196690014208

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-02-26 16:44:50 +01:00
parent 8b5c29b6c2
commit f9cb17f988
1 changed files with 3 additions and 0 deletions
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3
libavcodec/msmpeg4dec.c
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@ -208,6 +208,9 @@ static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64])
uint8_t *coded_val;
uint32_t * const mb_type_ptr = &s->current_picture.mb_type[s->mb_x + s->mb_y*s->mb_stride];
if (get_bits_left(&s->gb) <= 0)
return AVERROR_INVALIDDATA;
if (s->pict_type == AV_PICTURE_TYPE_P) {
if (s->use_skip_mb_code) {
if (get_bits1(&s->gb)) {