libavcodec/wmv2.c:86: error: Buffer Overrun L1
  Offset: [29, 36] (⇐ [5, 12] + 24) Size: 6 by call to `wmv2_add_block`.

libavcodec/wmv2.c:86:5: Call
84. 
85.     wmv2_add_block(w, block1[4], dest_cb                   , s->uvlinesize, 4);
86.     wmv2_add_block(w, block1[5], dest_cr                   , s->uvlinesize, 5);
        ^
87. }
88. 

libavcodec/wmv2.c:51:1: Parameter `n`
  49. }
  50. 
  51. static void wmv2_add_block(Wmv2Context *w, int16_t *block1, uint8_t *dst, int stride, int n){
      ^
  52.     MpegEncContext * const s= &w->s;
  53. 

libavcodec/wmv2.c:61:9: Call
  59.     case 1:
  60.         ff_simple_idct84_add(dst           , stride, block1);
  61.         ff_simple_idct84_add(dst + 4*stride, stride, w->abt_block2[n]);
              ^
  62.         s->dsp.clear_block(w->abt_block2[n]);
  63.         break;

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

libavcodec/simple_idct.c:188:9: Call
    186.     /* IDCT4 and store */
    187.     for(i=0;i<8;i++) {
    188.         idct4col_add(dest + i, line_size, block + i);
                 ^
    189.     }
    190. }

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

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

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