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indeo: Bound-check before applying motion compensation
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC: libav-stable@libav.org
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1dd1b2332e
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25a6666f6c
@ -44,16 +44,22 @@ static VLC ivi_blk_vlc_tabs[8]; ///< static block Huffman tables
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typedef void (*ivi_mc_func) (int16_t *buf, const int16_t *ref_buf,
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uint32_t pitch, int mc_type);
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static int ivi_mc(ivi_mc_func mc, int16_t *buf, const int16_t *ref_buf,
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int offs, int mv_x, int mv_y, uint32_t pitch,
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int mc_type)
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static int ivi_mc(IVIBandDesc *band, ivi_mc_func mc,
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int offs, int mv_x, int mv_y, int mc_type)
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{
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int ref_offs = offs + mv_y * pitch + mv_x;
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int ref_offs = offs + mv_y * band->pitch + mv_x;
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int buf_size = band->pitch * band->aheight;
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int min_size = band->pitch * (band->blk_size - 1) + band->blk_size;
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int ref_size = (mc_type > 1) * band->pitch + (mc_type & 1);
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if (offs < 0 || ref_offs < 0 || !ref_buf)
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if (offs < 0 || ref_offs < 0 || !band->ref_buf)
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return AVERROR_INVALIDDATA;
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if (buf_size - min_size < offs)
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return AVERROR_INVALIDDATA;
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if (buf_size - min_size - ref_size < ref_offs)
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return AVERROR_INVALIDDATA;
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mc(buf + offs, ref_buf + ref_offs, pitch, mc_type);
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mc(band->buf + offs, band->ref_buf + ref_offs, band->pitch, mc_type);
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return 0;
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}
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@ -513,8 +519,7 @@ static int ivi_decode_coded_blocks(GetBitContext *gb, IVIBandDesc *band,
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/* apply motion compensation */
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if (!is_intra)
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return ivi_mc(mc, band->buf, band->ref_buf, offs, mv_x, mv_y,
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band->pitch, mc_type);
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return ivi_mc(band, mc, offs, mv_x, mv_y, mc_type);
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return 0;
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}
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@ -617,8 +622,8 @@ static int ivi_decode_blocks(GetBitContext *gb, IVIBandDesc *band,
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if (ret < 0)
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return ret;
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} else {
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ret = ivi_mc(mc_no_delta_func, band->buf, band->ref_buf,
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buf_offs, mv_x, mv_y, band->pitch, mc_type);
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ret = ivi_mc(band, mc_no_delta_func, buf_offs,
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mv_x, mv_y, mc_type);
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if (ret < 0)
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return ret;
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}
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@ -724,8 +729,8 @@ static int ivi_process_empty_tile(AVCodecContext *avctx, IVIBandDesc *band,
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for (blk = 0; blk < num_blocks; blk++) {
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/* adjust block position in the buffer according with its number */
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offs = mb->buf_offs + band->blk_size * ((blk & 1) + !!(blk & 2) * band->pitch);
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ret = ivi_mc(mc_no_delta_func, band->buf, band->ref_buf,
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offs, mv_x, mv_y, band->pitch, mc_type);
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ret = ivi_mc(band, mc_no_delta_func, offs,
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mv_x, mv_y, mc_type);
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if (ret < 0)
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return ret;
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}
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