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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 01:38:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-07 02:49:54 +0100 |
| commit | 06f6857b54a7fbbd087b0803f75bed44abed50d9 (patch) | |
| tree | dcb097915d81aa23ba5ec692dffe1f435e435891 | |
| parent | d31a1266a789584d7de4a6c2f5d7f862003ad7ad (diff) | |
avcodec/vmdaudio: Check block_align more
Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 19788/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMDAUDIO_fuzzer-5743379690553344
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vmdaudio.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c index c7826fa3ce..dfbd49fd84 100644 --- a/libavcodec/vmdaudio.c +++ b/libavcodec/vmdaudio.c @@ -76,7 +76,9 @@ static av_cold int vmdaudio_decode_init(AVCodecContext *avctx) av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n"); return AVERROR(EINVAL); } - if (avctx->block_align < 1 || avctx->block_align % avctx->channels) { + if (avctx->block_align < 1 || avctx->block_align % avctx->channels || + avctx->block_align > INT_MAX - avctx->channels + ) { av_log(avctx, AV_LOG_ERROR, "invalid block align\n"); return AVERROR(EINVAL); } |