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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-25 19:19:54 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-02 14:18:21 +0100 |
| commit | e7001f7b3ca321261a9aa1a17178d06ef46d2ca2 (patch) | |
| tree | ad4b8e4e27696c96faa6e5f660b5328ab89385fa | |
| parent | 30aadcc78b2f6dc635e436fd7873dcd933c8c22f (diff) | |
| download | ffmpeg-e7001f7b3ca321261a9aa1a17178d06ef46d2ca2.tar.gz | |
avcodec/utils: Check bitrate for overflow in get_bit_rate()
Fixes: signed integer overflow: 617890810133996544 * 16 cannot be represented in type 'long'
Fixes: 26565/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5092054700654592
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 8aadae670f28b88e94770262cd1136562bdb2f45)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/utils.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/libavcodec/utils.c b/libavcodec/utils.c index 2e99e2fce7..236cdf1feb 100644 --- a/libavcodec/utils.c +++ b/libavcodec/utils.c @@ -511,7 +511,14 @@ static int64_t get_bit_rate(AVCodecContext *ctx) break; case AVMEDIA_TYPE_AUDIO: bits_per_sample = av_get_bits_per_sample(ctx->codec_id); - bit_rate = bits_per_sample ? ctx->sample_rate * (int64_t)ctx->channels * bits_per_sample : ctx->bit_rate; + if (bits_per_sample) { + bit_rate = ctx->sample_rate * (int64_t)ctx->channels; + if (bit_rate > INT64_MAX / bits_per_sample) { + bit_rate = 0; + } else + bit_rate *= bits_per_sample; + } else + bit_rate = ctx->bit_rate; break; default: bit_rate = 0; |