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avcodec/sonic: Check num_taps

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The encoder uses max 128 taps, which is quiet a lot already
If work is done to improve sonic, it will be more radical than changing the taps

Fixes: Timeout
Fixes: 402539974/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-6122944271286272

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
2025-05-11 01:08:06 +02:00
parent d28bec8c4d
commit fd0a792766
1 changed files with 3 additions and 0 deletions
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3
libavcodec/sonic.c
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@ -924,6 +924,9 @@ static av_cold int sonic_decode_init(AVCodecContext *avctx)
if (get_bits1(&gb)) // XXX FIXME if (get_bits1(&gb)) // XXX FIXME
av_log(avctx, AV_LOG_INFO, "Custom quant table\n"); av_log(avctx, AV_LOG_INFO, "Custom quant table\n");
if (s->num_taps > 128)
return AVERROR_INVALIDDATA;
s->block_align = 2048LL*s->samplerate/(44100*s->downsampling); s->block_align = 2048LL*s->samplerate/(44100*s->downsampling);
s->frame_size = s->channels*s->block_align*s->downsampling; s->frame_size = s->channels*s->block_align*s->downsampling;
// avctx->frame_size = s->block_align; // avctx->frame_size = s->block_align;