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avcodec/wavarc: Check k in decode_5elp() 

regression since 18b2ecc247

Fixes: assertion failure
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6280165808013312

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 2023-09-21 01:10:11 +02:00
parent dbcf285abd
commit 9cef555bc5
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1 changed files with 2 additions and 0 deletions
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libavcodec/wavarc.c
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@ -539,6 +539,8 @@ static int decode_5elp(AVCodecContext *avctx,
if (block_type >= 0 && block_type <= 7) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
if (k >= 32)
return AVERROR_INVALIDDATA;
}
if (block_type <= 2 || block_type == 6 || block_type == 13 ||