Commit 4a7876c6 authored by Laurent Aimar's avatar Laurent Aimar Committed by Michael Niedermayer

Check for out of bound writes in the QDM2 decoder.

Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent 491eaf35
......@@ -1800,6 +1800,8 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
avctx->channels = s->nb_channels = s->channels = AV_RB32(extradata);
extradata += 4;
if (s->channels > MPA_MAX_CHANNELS)
return AVERROR_INVALIDDATA;
avctx->sample_rate = AV_RB32(extradata);
extradata += 4;
......@@ -1821,6 +1823,8 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx)
// something like max decodable tones
s->group_order = av_log2(s->group_size) + 1;
s->frame_size = s->group_size / 16; // 16 iterations per super block
if (s->frame_size > FF_ARRAY_ELEMS(s->output_buffer) / 2)
return AVERROR_INVALIDDATA;
s->sub_sampling = s->fft_order - 7;
s->frequency_range = 255 / (1 << (2 - s->sub_sampling));
......
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