libavcodec/vc1dec.c:4257: error: Buffer Overrun L2
  Offset: [0, 63] Size: 2.

libavcodec/vc1dec.c:4257:36: <Offset trace>
4255.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
4256.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
4257.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
                                         ^
4258.             off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
4259.             off += v->cur_field_type ? ((i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0]) : 0;

libavcodec/vc1dec.c:4257:36: Assignment
4255.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
4256.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
4257.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
                                         ^
4258.             off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
4259.             off += v->cur_field_type ? ((i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0]) : 0;

libavcodec/vc1dec.c:4254:13: <Length trace>
4252.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
4253. 
4254.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
                  ^
4255.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
4256.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

libavcodec/vc1dec.c:4254:13: Call
4252.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];
4253. 
4254.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
                  ^
4255.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
4256.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);

libavcodec/vc1dec.c:2998:1: Parameter `*block`
  2996.  * @param codingset set of VLC to decode data
  2997.  */
  2998. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
        ^
  2999. {
  3000.     GetBitContext *gb = &v->s.gb;

libavcodec/vc1dec.c:4257:56: Array access: Offset: [0, 63] Size: 2
4255.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;
4256.             v->vc1dsp.vc1_inv_trans_8x8(s->block[i]);
4257.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;
                                                             ^
4258.             off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
4259.             off += v->cur_field_type ? ((i & 4) ? s->current_picture_ptr->f.linesize[1] : s->current_picture_ptr->f.linesize[0]) : 0;
