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avfilter/af_pan: check nb_output_channels before use

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Fixes: CID1500281 Out-of-bounds write
Fixes: CID1500331 Out-of-bounds write

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5fe8bf4aa5)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2024-06-10 23:41:07 +02:00
parent a1b6a6907b
commit c773ce8435
1 changed files with 8 additions and 0 deletions
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8
libavfilter/af_pan.c
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@ -118,6 +118,14 @@ static av_cold int init(AVFilterContext *ctx)
if (ret < 0) if (ret < 0)
goto fail; goto fail;
if (pan->nb_output_channels > MAX_CHANNELS) {
av_log(ctx, AV_LOG_ERROR,
"af_pan supports a maximum of %d channels. "
"Feel free to ask for a higher limit.\n", MAX_CHANNELS);
ret = AVERROR_PATCHWELCOME;
goto fail;
}
/* parse channel specifications */ /* parse channel specifications */
while ((arg = arg0 = av_strtok(NULL, "|", &tokenizer))) { while ((arg = arg0 = av_strtok(NULL, "|", &tokenizer))) {
int used_in_ch[MAX_CHANNELS] = {0}; int used_in_ch[MAX_CHANNELS] = {0};