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avcodec/dcaenc: fill the LFE history from the LFE channel

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Fixes: out of array read
Fixes: HBKKtIKDkJ9e
Found-by: Zheng Yu @ Depthfirst
This commit is contained in:
Michael Niedermayer
2026-09-15 06:13:53 +02:00
committed by michaelni
parent e723ebf0e2
commit f391d256fd
1 changed files with 2 additions and 1 deletions
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libavcodec/dcaenc.c
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@@ -969,7 +969,8 @@ static void shift_history(DCAEncContext *c, const int32_t *input)
for (k = 0; k < 512; k++)
for (ch = 0; ch < c->channels; ch++) {
const int chi = c->channel_order_tab[ch];
const int chi = ch < c->fullband_channels ? c->channel_order_tab[ch]
: lfe_index[c->channel_config];
c->history[ch][k] = input[k * c->channels + chi];
}