Message ID | 20191108205710.32295-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 47d963335eb2c36c0e6615d7971c762458e813dd |
Headers | show |
On Fri, Nov 08, 2019 at 09:57:07PM +0100, Michael Niedermayer wrote: > 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> > --- > libavcodec/vmdaudio.c | 3 +++ > 1 file changed, 3 insertions(+) will apply [...]
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;
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> --- libavcodec/vmdaudio.c | 3 +++ 1 file changed, 3 insertions(+)