libavcodec/wmv2.c:97: error: Buffer Overrun L1
  Offset: [29, 36] (⇐ [5, 12] + 24) Size: 6 by call to `wmv2_add_block`.

libavcodec/wmv2.c:97:5: Call
95. 
96.     wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
97.     wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
        ^
98. }
99. 

libavcodec/wmv2.c:57:1: Parameter `n`
  55. }
  56. 
  57. static void wmv2_add_block(Wmv2Context *w, int16_t *block1,
      ^
  58.                            uint8_t *dst, int stride, int n)
  59. {

libavcodec/wmv2.c:69:13: Call
  67.         case 1:
  68.             ff_simple_idct84_add(dst, stride, block1);
  69.             ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
                  ^
  70.             s->bdsp.clear_block(w->abt_block2[n]);
  71.             break;

libavcodec/simple_idct.c:176:1: Parameter `*block`
    174. }
    175. 
    176. void ff_simple_idct84_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
         ^
    177. {
    178.     int i;

libavcodec/simple_idct.c:187:9: Call
    185.     /* IDCT4 and store */
    186.     for(i=0;i<8;i++) {
    187.         idct4col_add(dest + i, line_size, block + i);
                 ^
    188.     }
    189. }

libavcodec/simple_idct.c:131:1: <Length trace>
129. #define C3 C_FIX(0.5)
130. #define C_SHIFT (4+1+12)
131. static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
     ^
132. {
133.     int c0, c1, c2, c3, a0, a1, a2, a3;

libavcodec/simple_idct.c:131:1: Parameter `*col`
      129. #define C3 C_FIX(0.5)
      130. #define C_SHIFT (4+1+12)
      131. static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
           ^
      132. {
      133.     int c0, c1, c2, c3, a0, a1, a2, a3;

libavcodec/simple_idct.c:138:10: Array access: Offset: [29, 36] (⇐ [5, 12] + 24) Size: 6 by call to `wmv2_add_block` 
      136.     a1 = col[8*1];
      137.     a2 = col[8*2];
      138.     a3 = col[8*3];
                    ^
      139.     c0 = (a0 + a2)*C3 + (1 << (C_SHIFT - 1));
      140.     c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1));
