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rtpdec_jpeg: Disallow using the reserved q values

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Signed-off-by: Martin Storsjö <martin@martin.st>
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Martin Storsjö 2012-09-11 14:41:42 +03:00
parent 1de9317bd0
commit 1743938df1
1 changed files with 4 additions and 0 deletions
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libavformat/rtpdec_jpeg.c
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@ -304,6 +304,10 @@ static int jpeg_parse_packet(AVFormatContext *ctx, PayloadContext *jpeg,
qtable_len = jpeg->qtables_len[q - 128]; qtable_len = jpeg->qtables_len[q - 128];
} }
} else { /* q <= 127 */ } else { /* q <= 127 */
if (q == 0 || q > 99) {
av_log(ctx, AV_LOG_ERROR, "Reserved q value %d\n", q);
return AVERROR_INVALIDDATA;
}
create_default_qtables(new_qtables, q); create_default_qtables(new_qtables, q);
qtables = new_qtables; qtables = new_qtables;
qtable_len = sizeof(new_qtables); qtable_len = sizeof(new_qtables);