[FFmpeg-devel] [PATCH 1/5] avcodec/wmaprodec: Check if there is a stream
Paul B Mahol
onemda at gmail.com
Thu Oct 3 09:52:49 EEST 2019
ok
On 10/2/19, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes: null pointer dereference
> Fixes: signed integer overflow: 512 * 2147483647 cannot be represented in
> type 'int'
> Fixes:
> 17809/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XMA1_fuzzer-5634409947987968
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
> libavcodec/wmaprodec.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
> index d0fa974c80..6ce2dd4adb 100644
> --- a/libavcodec/wmaprodec.c
> +++ b/libavcodec/wmaprodec.c
> @@ -1902,7 +1902,9 @@ static av_cold int xma_decode_init(AVCodecContext
> *avctx)
> }
>
> /* encoder supports up to 64 streams / 64*2 channels (would have to
> alloc arrays) */
> - if (avctx->channels > XMA_MAX_CHANNELS || s->num_streams >
> XMA_MAX_STREAMS) {
> + if (avctx->channels > XMA_MAX_CHANNELS || s->num_streams >
> XMA_MAX_STREAMS ||
> + s->num_streams <= 0
> + ) {
> avpriv_request_sample(avctx, "More than %d channels in %d streams",
> XMA_MAX_CHANNELS, s->num_streams);
> return AVERROR_PATCHWELCOME;
> }
> --
> 2.23.0
>
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