libavformat/nutdec.c:760: error: Null Dereference
  pointer `pkt->data` last assigned on line 759 could be null and is dereferenced by call to `memcpy()` at line 760, column 5.

libavformat/nutdec.c:732:1: start of procedure decode_frame()
730. }
731. 
732. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
     ^
733.     AVFormatContext *s= nut->avf;
734.     AVIOContext *bc = s->pb;

libavformat/nutdec.c:733:5: 
731. 
732. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
733.     AVFormatContext *s= nut->avf;
         ^
734.     AVIOContext *bc = s->pb;
735.     int size, stream_id, discard;

libavformat/nutdec.c:734:5: 
732. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
733.     AVFormatContext *s= nut->avf;
734.     AVIOContext *bc = s->pb;
         ^
735.     int size, stream_id, discard;
736.     int64_t pts, last_IP_pts;

libavformat/nutdec.c:740:5: Skipping decode_frame_header(): empty list of specs
738.     uint8_t header_idx;
739. 
740.     size= decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
         ^
741.     if(size < 0)
742.         return size;

libavformat/nutdec.c:741:8: Taking false branch
739. 
740.     size= decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
741.     if(size < 0)
            ^
742.         return size;
743. 

libavformat/nutdec.c:744:5: 
742.         return size;
743. 
744.     stc= &nut->stream[stream_id];
         ^
745. 
746.     if (stc->last_flags & FLAG_KEY)

libavformat/nutdec.c:746:9: Taking true branch
744.     stc= &nut->stream[stream_id];
745. 
746.     if (stc->last_flags & FLAG_KEY)
             ^
747.         stc->skip_until_key_frame=0;
748. 

libavformat/nutdec.c:747:9: 
745. 
746.     if (stc->last_flags & FLAG_KEY)
747.         stc->skip_until_key_frame=0;
             ^
748. 
749.     discard= s->streams[ stream_id ]->discard;

libavformat/nutdec.c:749:5: 
747.         stc->skip_until_key_frame=0;
748. 
749.     discard= s->streams[ stream_id ]->discard;
         ^
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))

libavformat/nutdec.c:750:5: 
748. 
749.     discard= s->streams[ stream_id ]->discard;
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
         ^
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)

libavformat/nutdec.c:751:11: Taking false branch
749.     discard= s->streams[ stream_id ]->discard;
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
               ^
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
753.        || discard >= AVDISCARD_ALL

libavformat/nutdec.c:752:11: Taking true branch
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
               ^
753.        || discard >= AVDISCARD_ALL
754.        || stc->skip_until_key_frame){

libavformat/nutdec.c:752:41: Taking true branch
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
                                             ^
753.        || discard >= AVDISCARD_ALL
754.        || stc->skip_until_key_frame){

libavformat/nutdec.c:752:74: Taking false branch
750.     last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
                                                                              ^
753.        || discard >= AVDISCARD_ALL
754.        || stc->skip_until_key_frame){

libavformat/nutdec.c:753:11: Taking false branch
751.     if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
753.        || discard >= AVDISCARD_ALL
               ^
754.        || stc->skip_until_key_frame){
755.         avio_skip(bc, size);

libavformat/nutdec.c:754:11: Taking false branch
752.        ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
753.        || discard >= AVDISCARD_ALL
754.        || stc->skip_until_key_frame){
               ^
755.         avio_skip(bc, size);
756.         return 1;

libavformat/nutdec.c:759:5: 
757.     }
758. 
759.     av_new_packet(pkt, size + nut->header_len[header_idx]);
         ^
760.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
761.     pkt->pos= avio_tell(bc); //FIXME

libavcodec/avpacket.c:60:1: start of procedure av_new_packet()
  58. }
  59. 
  60. int av_new_packet(AVPacket *pkt, int size)
      ^
  61. {
  62.     uint8_t *data= NULL;

libavcodec/avpacket.c:62:5: 
  60. int av_new_packet(AVPacket *pkt, int size)
  61. {
  62.     uint8_t *data= NULL;
          ^
  63.     if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  64.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);

libavcodec/avpacket.c:63:8: Taking true branch
  61. {
  62.     uint8_t *data= NULL;
  63.     if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
             ^
  64.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  65.     if (data){

libavcodec/avpacket.c:64:9: 
  62.     uint8_t *data= NULL;
  63.     if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  64.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
              ^
  65.     if (data){
  66.         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);

libavutil/mem.c:64:1: start of procedure av_malloc()
    62.    linker will do it automatically. */
    63. 
    64. void *av_malloc(size_t size)
        ^
    65. {
    66.     void *ptr = NULL;

libavutil/mem.c:66:5: 
    64. void *av_malloc(size_t size)
    65. {
    66.     void *ptr = NULL;
            ^
    67. #if CONFIG_MEMALIGN_HACK
    68.     long diff;

libavutil/mem.c:72:8: Taking true branch
    70. 
    71.     /* let's disallow possible ambiguous cases */
    72.     if(size > (INT_MAX-32) )
               ^
    73.         return NULL;
    74. 

libavutil/mem.c:73:9: 
    71.     /* let's disallow possible ambiguous cases */
    72.     if(size > (INT_MAX-32) )
    73.         return NULL;
                ^
    74. 
    75. #if CONFIG_MEMALIGN_HACK

libavutil/mem.c:115:1: return from a call to av_malloc
    113. #endif
    114.     return ptr;
    115. }
         ^
    116. 
    117. void *av_realloc(void *ptr, size_t size)

libavcodec/avpacket.c:65:9: Taking false branch
  63.     if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  64.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  65.     if (data){
              ^
  66.         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
  67.     }else

libavcodec/avpacket.c:68:9: 
  66.         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
  67.     }else
  68.         size=0;
              ^
  69. 
  70.     av_init_packet(pkt);

libavcodec/avpacket.c:70:5: 
  68.         size=0;
  69. 
  70.     av_init_packet(pkt);
          ^
  71.     pkt->data = data;
  72.     pkt->size = size;

libavcodec/avpacket.c:46:1: start of procedure av_init_packet()
    44. }
    45. 
    46. void av_init_packet(AVPacket *pkt)
        ^
    47. {
    48.     pkt->pts   = AV_NOPTS_VALUE;

libavcodec/avpacket.c:48:5: 
    46. void av_init_packet(AVPacket *pkt)
    47. {
    48.     pkt->pts   = AV_NOPTS_VALUE;
            ^
    49.     pkt->dts   = AV_NOPTS_VALUE;
    50.     pkt->pos   = -1;

libavcodec/avpacket.c:49:5: 
    47. {
    48.     pkt->pts   = AV_NOPTS_VALUE;
    49.     pkt->dts   = AV_NOPTS_VALUE;
            ^
    50.     pkt->pos   = -1;
    51.     pkt->duration = 0;

libavcodec/avpacket.c:50:5: 
    48.     pkt->pts   = AV_NOPTS_VALUE;
    49.     pkt->dts   = AV_NOPTS_VALUE;
    50.     pkt->pos   = -1;
            ^
    51.     pkt->duration = 0;
    52.     pkt->convergence_duration = 0;

libavcodec/avpacket.c:51:5: 
    49.     pkt->dts   = AV_NOPTS_VALUE;
    50.     pkt->pos   = -1;
    51.     pkt->duration = 0;
            ^
    52.     pkt->convergence_duration = 0;
    53.     pkt->flags = 0;

libavcodec/avpacket.c:52:5: 
    50.     pkt->pos   = -1;
    51.     pkt->duration = 0;
    52.     pkt->convergence_duration = 0;
            ^
    53.     pkt->flags = 0;
    54.     pkt->stream_index = 0;

libavcodec/avpacket.c:53:5: 
    51.     pkt->duration = 0;
    52.     pkt->convergence_duration = 0;
    53.     pkt->flags = 0;
            ^
    54.     pkt->stream_index = 0;
    55.     pkt->destruct= NULL;

libavcodec/avpacket.c:54:5: 
    52.     pkt->convergence_duration = 0;
    53.     pkt->flags = 0;
    54.     pkt->stream_index = 0;
            ^
    55.     pkt->destruct= NULL;
    56.     pkt->side_data       = NULL;

libavcodec/avpacket.c:55:5: 
    53.     pkt->flags = 0;
    54.     pkt->stream_index = 0;
    55.     pkt->destruct= NULL;
            ^
    56.     pkt->side_data       = NULL;
    57.     pkt->side_data_elems = 0;

libavcodec/avpacket.c:56:5: 
    54.     pkt->stream_index = 0;
    55.     pkt->destruct= NULL;
    56.     pkt->side_data       = NULL;
            ^
    57.     pkt->side_data_elems = 0;
    58. }

libavcodec/avpacket.c:57:5: 
    55.     pkt->destruct= NULL;
    56.     pkt->side_data       = NULL;
    57.     pkt->side_data_elems = 0;
            ^
    58. }
    59. 

libavcodec/avpacket.c:58:1: return from a call to av_init_packet
    56.     pkt->side_data       = NULL;
    57.     pkt->side_data_elems = 0;
    58. }
        ^
    59. 
    60. int av_new_packet(AVPacket *pkt, int size)

libavcodec/avpacket.c:71:5: 
  69. 
  70.     av_init_packet(pkt);
  71.     pkt->data = data;
          ^
  72.     pkt->size = size;
  73.     pkt->destruct = av_destruct_packet;

libavcodec/avpacket.c:72:5: 
  70.     av_init_packet(pkt);
  71.     pkt->data = data;
  72.     pkt->size = size;
          ^
  73.     pkt->destruct = av_destruct_packet;
  74.     if(!data)

libavcodec/avpacket.c:73:5: 
  71.     pkt->data = data;
  72.     pkt->size = size;
  73.     pkt->destruct = av_destruct_packet;
          ^
  74.     if(!data)
  75.         return AVERROR(ENOMEM);

libavcodec/avpacket.c:74:9: Taking true branch
  72.     pkt->size = size;
  73.     pkt->destruct = av_destruct_packet;
  74.     if(!data)
              ^
  75.         return AVERROR(ENOMEM);
  76.     return 0;

libavcodec/avpacket.c:75:9: 
  73.     pkt->destruct = av_destruct_packet;
  74.     if(!data)
  75.         return AVERROR(ENOMEM);
              ^
  76.     return 0;
  77. }

libavcodec/avpacket.c:77:1: return from a call to av_new_packet
  75.         return AVERROR(ENOMEM);
  76.     return 0;
  77. }
      ^
  78. 
  79. void av_shrink_packet(AVPacket *pkt, int size)

libavformat/nutdec.c:760:5: 
758. 
759.     av_new_packet(pkt, size + nut->header_len[header_idx]);
760.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
         ^
761.     pkt->pos= avio_tell(bc); //FIXME
762.     avio_read(bc, pkt->data + nut->header_len[header_idx], size);

static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){
    AVFormatContext *s= nut->avf;
    AVIOContext *bc = s->pb;
    int size, stream_id, discard;
    int64_t pts, last_IP_pts;
    StreamContext *stc;
    uint8_t header_idx;
    size= decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
    if(size < 0)
        return size;
    stc= &nut->stream[stream_id];
    if (stc->last_flags & FLAG_KEY)
        stc->skip_until_key_frame=0;
    discard= s->streams[ stream_id ]->discard;
    last_IP_pts= s->streams[ stream_id ]->last_IP_pts;
    if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))
       ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)
       || discard >= AVDISCARD_ALL
       || stc->skip_until_key_frame){
        avio_skip(bc, size);
        return 1;
    }
    av_new_packet(pkt, size + nut->header_len[header_idx]);
    memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
    pkt->pos= avio_tell(bc);
    avio_read(bc, pkt->data + nut->header_len[header_idx], size);
    pkt->stream_index = stream_id;
    if (stc->last_flags & FLAG_KEY)
        pkt->flags |= AV_PKT_FLAG_KEY;
    pkt->pts = pts;
    return 0;
}
['static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code){\n    AVFormatContext *s= nut->avf;\n    AVIOContext *bc = s->pb;\n    int size, stream_id, discard;\n    int64_t pts, last_IP_pts;\n    StreamContext *stc;\n    uint8_t header_idx;\n    size= decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);\n    if(size < 0)\n        return size;\n    stc= &nut->stream[stream_id];\n    if (stc->last_flags & FLAG_KEY)\n        stc->skip_until_key_frame=0;\n    discard= s->streams[ stream_id ]->discard;\n    last_IP_pts= s->streams[ stream_id ]->last_IP_pts;\n    if(  (discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY))\n       ||(discard >= AVDISCARD_BIDIR && last_IP_pts != AV_NOPTS_VALUE && last_IP_pts > pts)\n       || discard >= AVDISCARD_ALL\n       || stc->skip_until_key_frame){\n        avio_skip(bc, size);\n        return 1;\n    }\n    av_new_packet(pkt, size + nut->header_len[header_idx]);\n    memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);\n    pkt->pos= avio_tell(bc);\n    avio_read(bc, pkt->data + nut->header_len[header_idx], size);\n    pkt->stream_index = stream_id;\n    if (stc->last_flags & FLAG_KEY)\n        pkt->flags |= AV_PKT_FLAG_KEY;\n    pkt->pts = pts;\n    return 0;\n}', 'int av_new_packet(AVPacket *pkt, int size)\n{\n    uint8_t *data= NULL;\n    if((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)\n        data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);\n    if (data){\n        memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);\n    }else\n        size=0;\n    av_init_packet(pkt);\n    pkt->data = data;\n    pkt->size = size;\n    pkt->destruct = av_destruct_packet;\n    if(!data)\n        return AVERROR(ENOMEM);\n    return 0;\n}', 'void *av_malloc(size_t size)\n{\n    void *ptr = NULL;\n#if CONFIG_MEMALIGN_HACK\n    long diff;\n#endif\n    if(size > (INT_MAX-32) )\n        return NULL;\n#if CONFIG_MEMALIGN_HACK\n    ptr = malloc(size+32);\n    if(!ptr)\n        return ptr;\n    diff= ((-(long)ptr - 1)&31) + 1;\n    ptr = (char*)ptr + diff;\n    ((char*)ptr)[-1]= diff;\n#elif HAVE_POSIX_MEMALIGN\n    if (posix_memalign(&ptr,32,size))\n        ptr = NULL;\n#elif HAVE_MEMALIGN\n    ptr = memalign(32,size);\n#else\n    ptr = malloc(size);\n#endif\n    return ptr;\n}', 'void av_init_packet(AVPacket *pkt)\n{\n    pkt->pts   = AV_NOPTS_VALUE;\n    pkt->dts   = AV_NOPTS_VALUE;\n    pkt->pos   = -1;\n    pkt->duration = 0;\n    pkt->convergence_duration = 0;\n    pkt->flags = 0;\n    pkt->stream_index = 0;\n    pkt->destruct= NULL;\n    pkt->side_data       = NULL;\n    pkt->side_data_elems = 0;\n}']