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avcodec/wmavoice: Check sample_rate

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Fixes: left shift of 538976288 by 8 places cannot be represented in type 'int'
Fixes: 18376/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMAVOICE_fuzzer-5741645391200256

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
2019-10-23 22:32:47 +02:00
parent 9ea9973959
commit 55c97a7637
1 changed files with 3 additions and 0 deletions
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3
libavcodec/wmavoice.c
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@ -433,6 +433,9 @@ static av_cold int wmavoice_decode_init(AVCodecContext *ctx)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }
if (ctx->sample_rate >= INT_MAX / (256 * 37))
return AVERROR_INVALIDDATA;
s->min_pitch_val = ((ctx->sample_rate << 8) / 400 + 50) >> 8; s->min_pitch_val = ((ctx->sample_rate << 8) / 400 + 50) >> 8;
s->max_pitch_val = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8; s->max_pitch_val = ((ctx->sample_rate << 8) * 37 / 2000 + 50) >> 8;
pitch_range = s->max_pitch_val - s->min_pitch_val; pitch_range = s->max_pitch_val - s->min_pitch_val;