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avcodec/indeo4: Check for end of bitstream in decode_mb_info()

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Fixes: Timeout
Fixes: 8776/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_INDEO4_fuzzer-5361788798369792

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 267ba2aa96)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-07-02 01:26:44 +02:00
parent 4ca95e64db
commit 78aa78410b
1 changed files with 5 additions and 0 deletions
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5
libavcodec/indeo4.c
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@ -492,6 +492,11 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
mb->b_mv_x =
mb->b_mv_y = 0;
if (get_bits_left(&ctx->gb) < 1) {
av_log(avctx, AV_LOG_ERROR, "Insufficient input for mb info\n");
return AVERROR_INVALIDDATA;
}
if (get_bits1(&ctx->gb)) {
if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");