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Merge commit 'cd78e934c246d1b2510f8fba0abfe40bb75795f6'

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* commit 'cd78e934c246d1b2510f8fba0abfe40bb75795f6':
  indeo4: Validate scantable dimension

See: 92f7f1db42
Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-14 12:48:13 +02:00
commit ccb422a697
1 changed files with 10 additions and 4 deletions
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14
libavcodec/indeo4.c
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@ -355,14 +355,20 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
band->transform_size= (transform_id < 10) ? 8 : 4; band->transform_size= (transform_id < 10) ? 8 : 4;
scan_indx = get_bits(&ctx->gb, 4); scan_indx = get_bits(&ctx->gb, 4);
if ((scan_indx>4 && scan_indx<10) != (band->blk_size==4)) {
av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
return AVERROR_INVALIDDATA;
}
if (scan_indx == 15) { if (scan_indx == 15) {
av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n"); av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
} }
if (scan_indx > 4 && scan_indx < 10) {
if (band->blk_size != 4) {
av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
return AVERROR_INVALIDDATA;
}
} else if (band->blk_size != 8) {
av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
return AVERROR_INVALIDDATA;
}
band->scan = scan_index_to_tab[scan_indx]; band->scan = scan_index_to_tab[scan_indx];
band->scan_size = band->blk_size; band->scan_size = band->blk_size;