libavformat/mxfdec.c:560: error: Null Dereference
  pointer `mxf->metadata_sets` last assigned on line 555 could be null and is dereferenced at line 560, column 5.

libavformat/mxfdec.c:549:1: start of procedure mxf_add_metadata_set()
547. }
548. 
549. static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
     ^
550. {
551.     int err;

libavformat/mxfdec.c:553:9: Taking false branch
551.     int err;
552. 
553.     if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
             ^
554.         return AVERROR(ENOMEM);
555.     if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,

libavformat/mxfdec.c:555:9: 
553.     if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
554.         return AVERROR(ENOMEM);
555.     if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
             ^
556.                                  sizeof(*mxf->metadata_sets))) < 0) {
557.         mxf->metadata_sets_count = 0;

libavutil/mem.c:146:1: start of procedure av_reallocp_array()
  144. }
  145. 
  146. int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
       ^
  147. {
  148.     void **ptrptr = ptr;

libavutil/mem.c:148:5: 
  146. int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
  147. {
  148.     void **ptrptr = ptr;
           ^
  149.     void *ret;
  150.     if (!size || nmemb >= INT_MAX / size)

libavutil/mem.c:150:10: Taking false branch
  148.     void **ptrptr = ptr;
  149.     void *ret;
  150.     if (!size || nmemb >= INT_MAX / size)
                ^
  151.         return AVERROR(ENOMEM);
  152.     if (!nmemb) {

libavutil/mem.c:150:18: Taking false branch
  148.     void **ptrptr = ptr;
  149.     void *ret;
  150.     if (!size || nmemb >= INT_MAX / size)
                        ^
  151.         return AVERROR(ENOMEM);
  152.     if (!nmemb) {

libavutil/mem.c:152:10: Taking true branch
  150.     if (!size || nmemb >= INT_MAX / size)
  151.         return AVERROR(ENOMEM);
  152.     if (!nmemb) {
                ^
  153.         av_freep(ptr);
  154.         return 0;

libavutil/mem.c:153:9: 
  151.         return AVERROR(ENOMEM);
  152.     if (!nmemb) {
  153.         av_freep(ptr);
               ^
  154.         return 0;
  155.     }

libavutil/mem.c:177:1: start of procedure av_freep()
    175. }
    176. 
    177. void av_freep(void *arg)
         ^
    178. {
    179.     void **ptr = (void **)arg;

libavutil/mem.c:179:5: 
    177. void av_freep(void *arg)
    178. {
    179.     void **ptr = (void **)arg;
             ^
    180.     av_free(*ptr);
    181.     *ptr = NULL;

libavutil/mem.c:180:5: 
    178. {
    179.     void **ptr = (void **)arg;
    180.     av_free(*ptr);
             ^
    181.     *ptr = NULL;
    182. }

libavutil/mem.c:165:1: start of procedure av_free()
      163. }
      164. 
      165. void av_free(void *ptr)
           ^
      166. {
      167. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:173:5: 
      171.     _aligned_free(ptr);
      172. #else
      173.     free(ptr);
               ^
      174. #endif
      175. }

libavutil/mem.c:175:1: return from a call to av_free
      173.     free(ptr);
      174. #endif
      175. }
           ^
      176. 
      177. void av_freep(void *arg)

libavutil/mem.c:181:5: 
    179.     void **ptr = (void **)arg;
    180.     av_free(*ptr);
    181.     *ptr = NULL;
             ^
    182. }
    183. 

libavutil/mem.c:182:1: return from a call to av_freep
    180.     av_free(*ptr);
    181.     *ptr = NULL;
    182. }
         ^
    183. 
    184. void *av_mallocz(size_t size)

libavutil/mem.c:154:9: 
  152.     if (!nmemb) {
  153.         av_freep(ptr);
  154.         return 0;
               ^
  155.     }
  156.     ret = av_realloc(*ptrptr, nmemb * size);

libavutil/mem.c:163:1: return from a call to av_reallocp_array
  161.     *ptrptr = ret;
  162.     return 0;
  163. }
       ^
  164. 
  165. void av_free(void *ptr)

libavformat/mxfdec.c:555:9: Taking false branch
553.     if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
554.         return AVERROR(ENOMEM);
555.     if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
             ^
556.                                  sizeof(*mxf->metadata_sets))) < 0) {
557.         mxf->metadata_sets_count = 0;

libavformat/mxfdec.c:560:5: 
558.         return err;
559.     }
560.     mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
         ^
561.     mxf->metadata_sets_count++;
562.     return 0;

static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
{
    int err;
    if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))
        return AVERROR(ENOMEM);
    if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,
                                 sizeof(*mxf->metadata_sets))) < 0) {
        mxf->metadata_sets_count = 0;
        return err;
    }
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
    mxf->metadata_sets_count++;
    return 0;
}
['static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)\n{\n    int err;\n    if (mxf->metadata_sets_count+1 >= UINT_MAX / sizeof(*mxf->metadata_sets))\n        return AVERROR(ENOMEM);\n    if ((err = av_reallocp_array(&mxf->metadata_sets, mxf->metadata_sets_count + 1,\n                                 sizeof(*mxf->metadata_sets))) < 0) {\n        mxf->metadata_sets_count = 0;\n        return err;\n    }\n    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;\n    mxf->metadata_sets_count++;\n    return 0;\n}', 'int av_reallocp_array(void *ptr, size_t nmemb, size_t size)\n{\n    void **ptrptr = ptr;\n    void *ret;\n    if (!size || nmemb >= INT_MAX / size)\n        return AVERROR(ENOMEM);\n    if (!nmemb) {\n        av_freep(ptr);\n        return 0;\n    }\n    ret = av_realloc(*ptrptr, nmemb * size);\n    if (!ret) {\n        av_freep(ptr);\n        return AVERROR(ENOMEM);\n    }\n    *ptrptr = ret;\n    return 0;\n}', 'void av_freep(void *arg)\n{\n    void **ptr = (void **)arg;\n    av_free(*ptr);\n    *ptr = NULL;\n}', 'void av_free(void *ptr)\n{\n#if CONFIG_MEMALIGN_HACK\n    if (ptr)\n        free((char *)ptr - ((char *)ptr)[-1]);\n#elif HAVE_ALIGNED_MALLOC\n    _aligned_free(ptr);\n#else\n    free(ptr);\n#endif\n}']