libavcodec/sonic.c:422: error: Null Dereference
  pointer `state` last assigned on line 420 could be null and is dereferenced by call to `memcpy()` at line 422, column 5.

libavcodec/sonic.c:416:1: start of procedure modified_levinson_durbin()
414. // actual whitened result as it goes.
415. 
416. static void modified_levinson_durbin(int *window, int window_entries,
     ^
417.         int *out, int out_entries, int channels, int *tap_quant)
418. {

libavcodec/sonic.c:420:5: 
418. {
419.     int i;
420.     int *state = av_mallocz(4* window_entries);
         ^
421. 
422.     memcpy(state, window, 4* window_entries);

libavutil/mem.c:139:1: start of procedure av_mallocz()
  137. }
  138. 
  139. void *av_mallocz(unsigned int size)
       ^
  140. {
  141.     void *ptr = av_malloc(size);

libavutil/mem.c:141:5: 
  139. void *av_mallocz(unsigned int size)
  140. {
  141.     void *ptr = av_malloc(size);
           ^
  142.     if (ptr)
  143.         memset(ptr, 0, size);

libavutil/mem.c:47:1: start of procedure av_malloc()
    45.    linker will do it automatically. */
    46. 
    47. void *av_malloc(unsigned int size)
        ^
    48. {
    49.     void *ptr = NULL;

libavutil/mem.c:49:5: 
    47. void *av_malloc(unsigned int size)
    48. {
    49.     void *ptr = NULL;
            ^
    50. #if CONFIG_MEMALIGN_HACK
    51.     long diff;

libavutil/mem.c:55:8: Taking true branch
    53. 
    54.     /* let's disallow possible ambiguous cases */
    55.     if(size > (INT_MAX-16) )
               ^
    56.         return NULL;
    57. 

libavutil/mem.c:56:9: 
    54.     /* let's disallow possible ambiguous cases */
    55.     if(size > (INT_MAX-16) )
    56.         return NULL;
                ^
    57. 
    58. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:99:1: return from a call to av_malloc
     97. #endif
     98.     return ptr;
     99. }
         ^
    100. 
    101. void *av_realloc(void *ptr, unsigned int size)

libavutil/mem.c:142:9: Taking false branch
  140. {
  141.     void *ptr = av_malloc(size);
  142.     if (ptr)
               ^
  143.         memset(ptr, 0, size);
  144.     return ptr;

libavutil/mem.c:144:5: 
  142.     if (ptr)
  143.         memset(ptr, 0, size);
  144.     return ptr;
           ^
  145. }
  146. 

libavutil/mem.c:145:1: return from a call to av_mallocz
  143.         memset(ptr, 0, size);
  144.     return ptr;
  145. }
       ^
  146. 
  147. char *av_strdup(const char *s)

libavcodec/sonic.c:422:5: 
420.     int *state = av_mallocz(4* window_entries);
421. 
422.     memcpy(state, window, 4* window_entries);
         ^
423. 
424.     for (i = 0; i < out_entries; i++)
