libavcodec/wmv2.c:70: error: Buffer Overrun L1
  Offset: [29, 36] (⇐ [5, 12] + 24) Size: 6 by call to `wmv2_add_block`.

libavcodec/wmv2.c:70:5: Call
68. 
69.     wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
70.     wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
        ^
71. }
72. 

libavcodec/wmv2.c:35:1: Parameter `n`
  33. }
  34. 
  35. static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
      ^
  36.     MpegEncContext * const s= &w->s;
  37. 

libavcodec/wmv2.c:45:9: Call
  43.     case 1:
  44.         ff_simple_idct84_add(dst           , stride, block1);
  45.         ff_simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
              ^
  46.         s->dsp.clear_block(w->abt_block2[n]);
  47.         break;

libavcodec/simple_idct.c:558:1: Parameter `*block`
    556. }
    557. 
    558. void ff_simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block)
         ^
    559. {
    560.     int i;

libavcodec/simple_idct.c:569:9: Call
    567.     /* IDCT4 and store */
    568.     for(i=0;i<8;i++) {
    569.         idct4col_add(dest + i, line_size, block + i);
                 ^
    570.     }
    571. }

libavcodec/simple_idct.c:511:1: <Length trace>
509. #define C3 C_FIX(0.5)
510. #define C_SHIFT (4+1+12)
511. static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col)
     ^
512. {
513.     int c0, c1, c2, c3, a0, a1, a2, a3;

libavcodec/simple_idct.c:511:1: Parameter `*col`
      509. #define C3 C_FIX(0.5)
      510. #define C_SHIFT (4+1+12)
      511. static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col)
           ^
      512. {
      513.     int c0, c1, c2, c3, a0, a1, a2, a3;

libavcodec/simple_idct.c:519:10: Array access: Offset: [29, 36] (⇐ [5, 12] + 24) Size: 6 by call to `wmv2_add_block` 
      517.     a1 = col[8*1];
      518.     a2 = col[8*2];
      519.     a3 = col[8*3];
                    ^
      520.     c0 = (a0 + a2)*C3 + (1 << (C_SHIFT - 1));
      521.     c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1));
