libavcodec/sipr.c:332: error: Buffer Overrun L3
  Offset: [-1, +oo] (⇐ [10, +oo] + [-11, -6]) Size: 58 by call to `ff_celp_lp_synthesis_filterf`.

libavcodec/sipr.c:316:1: Array declaration
314.  * Apply postfilter, very similar to AMR one.
315.  */
316. static void postfilter_5k0(SiprContext *ctx, const float *lpc, float *samples)
     ^
317. {
318.     float buf[SUBFR_SIZE + LP_FILTER_ORDER];

libavcodec/sipr.c:319:5: Assignment
317. {
318.     float buf[SUBFR_SIZE + LP_FILTER_ORDER];
319.     float *pole_out = buf + LP_FILTER_ORDER;
         ^
320.     float lpc_n[LP_FILTER_ORDER];
321.     float lpc_d[LP_FILTER_ORDER];

libavcodec/sipr.c:332:5: Call
330.            LP_FILTER_ORDER*sizeof(float));
331. 
332.     ff_celp_lp_synthesis_filterf(pole_out, lpc_d, samples, SUBFR_SIZE,
         ^
333.                                  LP_FILTER_ORDER);
334. 

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 `*out`
  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:139:24: Array access: Offset: [-1, +oo] (⇐ [10, +oo] + [-11, -6]) Size: 58 by call to `ff_celp_lp_synthesis_filterf` 
  137.             out3 -= val * old_out2;
  138. 
  139.             old_out2 = out[-i-1];
                              ^
  140. 
  141.             val = filter_coeffs[i];
