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avcodec/binkaudio: Fix 2Ghz sample_rate 

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 19950/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_BINKAUDIO_DCT_fuzzer-5765514337189888

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Suggested-by: Paul
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f603d10b1e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-04-19 17:05:53 +02:00
parent 2f747b2d82
commit 36786f54e7
1 changed files with 1 additions and 1 deletions
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2
libavcodec/binkaudio.c
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@ -109,7 +109,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
s->frame_len = 1 << frame_len_bits; s->frame_len = 1 << frame_len_bits;
s->overlap_len = s->frame_len / 16; s->overlap_len = s->frame_len / 16;
s->block_size = (s->frame_len - s->overlap_len) * s->channels; s->block_size = (s->frame_len - s->overlap_len) * s->channels;
sample_rate_half = (sample_rate + 1) / 2; sample_rate_half = (sample_rate + 1LL) / 2;
if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT) if (avctx->codec->id == AV_CODEC_ID_BINKAUDIO_RDFT)
s->root = 2.0 / (sqrt(s->frame_len) * 32768.0); s->root = 2.0 / (sqrt(s->frame_len) * 32768.0);
else else