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avcodec/vp8: Check for the bitstream end per MB in decode_mb_row_no_filter()

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Fixes: timeout in 730/clusterfuzz-testcase-5265113739165696 (part 2 of 2)

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Reviewed-by: BBB
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-03-07 19:09:39 +01:00
parent 55d7371fe0
commit 1afd246960
1 changed files with 2 additions and 0 deletions
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2
libavcodec/vp8.c
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@ -2330,6 +2330,8 @@ static av_always_inline int decode_mb_row_no_filter(AVCodecContext *avctx, void
s->mv_max.x = ((s->mb_width - 1) << 6) + MARGIN;
for (mb_x = 0; mb_x < s->mb_width; mb_x++, mb_xy++, mb++) {
if (c->end <= c->buffer && c->bits >= 0)
return AVERROR_INVALIDDATA;
// Wait for previous thread to read mb_x+2, and reach mb_y-1.
if (prev_td != td) {
if (threadnr != 0) {