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avcodec/hcadec: do not allow code to continue after failed init 

Fixes: 62285/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HCA_fuzzer-6247136417087488
Fixes: out of array write

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 48eeb198a5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-03-26 01:46:02 +01:00
parent 30fe9d3511
commit aa4cf7a584
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1 changed files with 3 additions and 1 deletions
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libavcodec/hcadec.c
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@ -538,8 +538,10 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
return AVERROR_INVALIDDATA;
} else if (AV_RB16(avpkt->data + 6) <= avpkt->size) {
ret = init_hca(avctx, avpkt->data, AV_RB16(avpkt->data + 6));
if (ret < 0)
if (ret < 0) {
c->crc_table = NULL; // signal that init has not finished
return ret;
}
offset = AV_RB16(avpkt->data + 6);
if (offset == avpkt->size)
return avpkt->size;