[FFmpeg-devel] [PATCH 1/2] avcodec/siren: Fix integer overflow in get_dw()

Paul B Mahol onemda at gmail.com
Wed Mar 18 21:31:02 EET 2020


probably ok

On 3/18/20, Michael Niedermayer <michael at niedermayer.cc> wrote:
> Fixes: signed integer overflow: 685813396 + 1803454769 cannot be represented
> in type 'int'
> Fixes:
> 21073/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SIREN_fuzzer-5744900508483584
>
> 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/siren.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavcodec/siren.c b/libavcodec/siren.c
> index 76dfe62843..1c17d4505d 100644
> --- a/libavcodec/siren.c
> +++ b/libavcodec/siren.c
> @@ -363,7 +363,7 @@ typedef struct SirenContext {
>      int sample_rate_bits;
>      int region_size;
>
> -    int dw1, dw2, dw3, dw4;
> +    unsigned dw1, dw2, dw3, dw4;
>
>      int absolute_region_power_index[32];
>      float decoder_standard_deviation[32];
> --
> 2.17.1
>
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