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avcodec/wavarc: Check order before using it to write the list

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Fixes: out of array access
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6247711015043072
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6487578428964864
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6651587794960384
Fixes: 45982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-6686265824378880

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
2023-04-16 17:51:02 +02:00
parent 957106a24d
commit e2e34c7731
1 changed files with 2 additions and 0 deletions
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2
libavcodec/wavarc.c
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@@ -343,6 +343,8 @@ static int decode_2slp(AVCodecContext *avctx,
break; break;
case 0: case 0:
order = get_urice(gb, 2); order = get_urice(gb, 2);
if ((unsigned)order >= FF_ARRAY_ELEMS(s->filter[ch]))
return AVERROR_INVALIDDATA;
for (int o = 0; o < order; o++) for (int o = 0; o < order; o++)
s->filter[ch][o] = get_srice(gb, 2); s->filter[ch][o] = get_srice(gb, 2);
for (int n = 0; n < s->nb_samples; n++) { for (int n = 0; n < s->nb_samples; n++) {