[FFmpeg-devel] [PATCH 2/2] avcodec/mobiclip: set the bitstream size to the input

[Paul B Mahol]

On Sat, Sep 12, 2020 at 04:35:55PM +0200, Michael Niedermayer wrote:
> Fixes: out of array read
> Fixes: 25453/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MOBICLIP_fuzzer-5163575973511168
> 
> 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/mobiclip.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavcodec/mobiclip.c b/libavcodec/mobiclip.c
> index 3ede370bef..08a35218cc 100644
> --- a/libavcodec/mobiclip.c
> +++ b/libavcodec/mobiclip.c
> @@ -1306,7 +1306,7 @@ static int mobiclip_decode(AVCodecContext *avctx, void *data,
>                          (uint16_t *)pkt->data,
>                          (pkt->size + 1) >> 1);
>  
> -    ret = init_get_bits8(gb, s->bitstream, s->bitstream_size);
> +    ret = init_get_bits8(gb, s->bitstream, FFALIGN(pkt->size, 2));
>      if (ret < 0)
>          return ret;

ok.

>  
> -- 
> 2.17.1
> 
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