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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-08 17:28:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-31 19:51:56 +0100 |
| commit | e0f9f529385a49da3e7422e7d3f77e88a25aebd3 (patch) | |
| tree | f0f80f717a5b46801a4af05b6c1a260e5ba6e802 | |
| parent | 3266d05538f3573a5aa7eddbbe8663c78e66f6af (diff) | |
| download | ffmpeg-e0f9f529385a49da3e7422e7d3f77e88a25aebd3.tar.gz | |
avcodec/vmdaudio: Check chunk counts to avoid integer overflow
Fixes: signed integer overflow: 4 * 538976288 cannot be represented in type 'int'
Fixes: 18622/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMDAUDIO_fuzzer-5092166174507008
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 47d963335eb2c36c0e6615d7971c762458e813dd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vmdaudio.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/vmdaudio.c b/libavcodec/vmdaudio.c index e8c8a064c7..c7826fa3ce 100644 --- a/libavcodec/vmdaudio.c +++ b/libavcodec/vmdaudio.c @@ -179,6 +179,9 @@ static int vmdaudio_decode_frame(AVCodecContext *avctx, void *data, /* drop incomplete chunks */ buf_size = audio_chunks * s->chunk_size; + if (silent_chunks + audio_chunks >= INT_MAX / avctx->block_align) + return AVERROR_INVALIDDATA; + /* get output buffer */ frame->nb_samples = ((silent_chunks + audio_chunks) * avctx->block_align) / avctx->channels; |