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avcodec/atrac9dec: Check block_align 

Fixes: Infinite loop
Fixes: 16260/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC9_fuzzer-5676365617037312
Fixes: 16260/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ATRAC9_fuzzer-5768093879500800

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 dead949a1f)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-08-19 01:03:59 +02:00
parent 95e414dc5d
commit 14616c63df
1 changed files with 5 additions and 0 deletions
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5
libavcodec/atrac9dec.c
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@ -842,6 +842,11 @@ static av_cold int atrac9_decode_init(AVCodecContext *avctx)
av_lfg_init(&s->lfg, 0xFBADF00D);
if (avctx->block_align <= 0) {
av_log(avctx, AV_LOG_ERROR, "Invalid block align\n");
return AVERROR_INVALIDDATA;
}
if (avctx->extradata_size != 12) {
av_log(avctx, AV_LOG_ERROR, "Invalid extradata length!\n");
return AVERROR_INVALIDDATA;