On 11/3/16, Michael Niedermayer <mich...@niedermayer.cc> wrote:
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
> libavcodec/ac3dec.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
> index a95c204..499971a 100644
> --- a/libavcodec/ac3dec.c
> +++ b/libavcodec/ac3dec.c
> @@ -426,6 +426,10 @@ static int decode_exponents(AC3DecodeContext *s,
> group_size = exp_strategy + (exp_strategy == EXP_D45);
> for (grp = 0, i = 0; grp < ngrps; grp++) {
> expacc = get_bits(gbc, 7);
> + if (expacc >= 125) {
> + av_log(s->avctx, AV_LOG_ERROR, "expacc %d is out-of-range\n",
> expacc);
> + return AVERROR_INVALIDDATA;
> + }
> dexp[i++] = ungroup_3_in_7_bits_tab[expacc][0];
> dexp[i++] = ungroup_3_in_7_bits_tab[expacc][1];
> dexp[i++] = ungroup_3_in_7_bits_tab[expacc][2];
> --
Please revert this ASAP. It breaks decoding valid files.
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