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lavfi/ashowinfo: check plane value before deferencing.
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@ -53,7 +53,7 @@ static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
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if (!av_sample_fmt_is_planar(samplesref->format))
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linesize *= av_get_channel_layout_nb_channels(samplesref->audio->channel_layout);
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for (plane = 0; samplesref->data[plane] && plane < 8; plane++) {
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for (plane = 0; plane < 8 && samplesref->data[plane]; plane++) {
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uint8_t *data = samplesref->data[plane];
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plane_checksum[plane] = av_adler32_update(plane_checksum[plane],
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@ -78,7 +78,7 @@ static int filter_samples(AVFilterLink *inlink, AVFilterBufferRef *samplesref)
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checksum,
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plane_checksum[0]);
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for (plane = 1; samplesref->data[plane] && plane < 8; plane++)
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for (plane = 1; plane < 8 && samplesref->data[plane]; plane++)
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av_log(ctx, AV_LOG_INFO, " %08X", plane_checksum[plane]);
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av_log(ctx, AV_LOG_INFO, "]\n");
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