libavcodec/amrwbdec.c:1013: error: Buffer Overrun L2
  Offset: [5, 20] Size: 20 by call to `ff_celp_lp_synthesis_filterf`.

libavcodec/amrwbdec.c:989:1: Array declaration
987.  * @param[in]     isf_past         Past frame final isf vector
988.  */
989. static void hb_synthesis(AMRWBContext *ctx, int subframe, float *samples,
     ^
990.                          const float *exc, const float *isf, const float *isf_past)
991. {

libavcodec/amrwbdec.c:1013:5: Call
1011.     }
1012. 
1013.     ff_celp_lp_synthesis_filterf(samples, hb_lpc, exc, AMRWB_SFR_SIZE_16k,
          ^
1014.                                  (mode == MODE_6k60) ? LP_ORDER_16k : LP_ORDER);
1015. }

libavcodec/celp_filters.c:83:1: <Offset trace>
81. }
82. 
83. void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
    ^
84.                                   const float* in, int buffer_length,
85.                                   int filter_length)

libavcodec/celp_filters.c:83:1: Parameter `filter_length`
  81. }
  82. 
  83. void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
      ^
  84.                                   const float* in, int buffer_length,
  85.                                   int filter_length)

libavcodec/celp_filters.c:83:1: <Length trace>
81. }
82. 
83. void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
    ^
84.                                   const float* in, int buffer_length,
85.                                   int filter_length)

libavcodec/celp_filters.c:83:1: Parameter `*filter_coeffs`
  81. }
  82. 
  83. void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
      ^
  84.                                   const float* in, int buffer_length,
  85.                                   int filter_length)

libavcodec/celp_filters.c:148:19: Array access: Offset: [5, 20] Size: 20 by call to `ff_celp_lp_synthesis_filterf` 
  146.             old_out2 = out[-i-1];
  147. 
  148.             val = filter_coeffs[i];
                         ^
  149. 
  150.             out0 -= val * old_out2;
