libavcodec/bitstream_filter.c:41: error: Null Dereference
  pointer `bsfc` last assigned on line 40 could be null and is dereferenced at line 41, column 13.

libavcodec/bitstream_filter.c:35:1: start of procedure av_bitstream_filter_init()
33. }
34. 
35. AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
    ^
36.     AVBitStreamFilter *bsf= first_bitstream_filter;
37. 

libavcodec/bitstream_filter.c:36:5: 
34. 
35. AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
36.     AVBitStreamFilter *bsf= first_bitstream_filter;
        ^
37. 
38.     while(bsf){

libavcodec/bitstream_filter.c:38:11: Loop condition is true. Entering loop body
36.     AVBitStreamFilter *bsf= first_bitstream_filter;
37. 
38.     while(bsf){
              ^
39.         if(!strcmp(name, bsf->name)){
40.             AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));

libavcodec/bitstream_filter.c:39:13: Taking true branch
37. 
38.     while(bsf){
39.         if(!strcmp(name, bsf->name)){
                ^
40.             AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
41.             bsfc->filter= bsf;

libavcodec/bitstream_filter.c:40:13: 
38.     while(bsf){
39.         if(!strcmp(name, bsf->name)){
40.             AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
                ^
41.             bsfc->filter= bsf;
42.             bsfc->priv_data= av_mallocz(bsf->priv_data_size);

libavutil/mem.c:132:1: start of procedure av_mallocz()
  130. }
  131. 
  132. void *av_mallocz(unsigned int size)
       ^
  133. {
  134.     void *ptr = av_malloc(size);

libavutil/mem.c:134:5: 
  132. void *av_mallocz(unsigned int size)
  133. {
  134.     void *ptr = av_malloc(size);
           ^
  135.     if (ptr)
  136.         memset(ptr, 0, size);

libavutil/mem.c:42:1: start of procedure av_malloc()
    40.    linker will do it automatically */
    41. 
    42. void *av_malloc(unsigned int size)
        ^
    43. {
    44.     void *ptr;

libavutil/mem.c:50:8: Taking false branch
    48. 
    49.     /* let's disallow possible ambiguous cases */
    50.     if(size > (INT_MAX-16) )
               ^
    51.         return NULL;
    52. 

libavutil/mem.c:61:5: Skipping memalign(): method has no implementation
    59.     ((char*)ptr)[-1]= diff;
    60. #elif defined (HAVE_MEMALIGN)
    61.     ptr = memalign(16,size);
            ^
    62.     /* Why 64?
    63.        Indeed, we should align it:

libavutil/mem.c:91:5: 
    89.     ptr = malloc(size);
    90. #endif
    91.     return ptr;
            ^
    92. }
    93. 

libavutil/mem.c:92:1: return from a call to av_malloc
    90. #endif
    91.     return ptr;
    92. }
        ^
    93. 
    94. void *av_realloc(void *ptr, unsigned int size)

libavutil/mem.c:135:9: Taking false branch
  133. {
  134.     void *ptr = av_malloc(size);
  135.     if (ptr)
               ^
  136.         memset(ptr, 0, size);
  137.     return ptr;

libavutil/mem.c:137:5: 
  135.     if (ptr)
  136.         memset(ptr, 0, size);
  137.     return ptr;
           ^
  138. }
  139. 

libavutil/mem.c:138:1: return from a call to av_mallocz
  136.         memset(ptr, 0, size);
  137.     return ptr;
  138. }
       ^
  139. 
  140. char *av_strdup(const char *s)

libavcodec/bitstream_filter.c:41:13: 
39.         if(!strcmp(name, bsf->name)){
40.             AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
41.             bsfc->filter= bsf;
                ^
42.             bsfc->priv_data= av_mallocz(bsf->priv_data_size);
43.             return bsfc;

AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){
    AVBitStreamFilter *bsf= first_bitstream_filter;
    while(bsf){
        if(!strcmp(name, bsf->name)){
            AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));
            bsfc->filter= bsf;
            bsfc->priv_data= av_mallocz(bsf->priv_data_size);
            return bsfc;
        }
        bsf= bsf->next;
    }
    return NULL;
}
['AVBitStreamFilterContext *av_bitstream_filter_init(const char *name){\n    AVBitStreamFilter *bsf= first_bitstream_filter;\n    while(bsf){\n        if(!strcmp(name, bsf->name)){\n            AVBitStreamFilterContext *bsfc= av_mallocz(sizeof(AVBitStreamFilterContext));\n            bsfc->filter= bsf;\n            bsfc->priv_data= av_mallocz(bsf->priv_data_size);\n            return bsfc;\n        }\n        bsf= bsf->next;\n    }\n    return NULL;\n}', 'void *av_mallocz(unsigned int size)\n{\n    void *ptr = av_malloc(size);\n    if (ptr)\n        memset(ptr, 0, size);\n    return ptr;\n}', 'void *av_malloc(unsigned int size)\n{\n    void *ptr;\n#ifdef CONFIG_MEMALIGN_HACK\n    long diff;\n#endif\n    if(size > (INT_MAX-16) )\n        return NULL;\n#ifdef CONFIG_MEMALIGN_HACK\n    ptr = malloc(size+16);\n    if(!ptr)\n        return ptr;\n    diff= ((-(long)ptr - 1)&15) + 1;\n    ptr = (char*)ptr + diff;\n    ((char*)ptr)[-1]= diff;\n#elif defined (HAVE_MEMALIGN)\n    ptr = memalign(16,size);\n#else\n    ptr = malloc(size);\n#endif\n    return ptr;\n}']