libavformat/nutdec.c:818: error: Null Dereference
  pointer `pkt->data` last assigned on line 817 could be null and is dereferenced by call to `memcpy()` at line 818, column 5.

libavformat/nutdec.c:788:1: start of procedure decode_frame()
786. }
787. 
788. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code)
     ^
789. {
790.     AVFormatContext *s = nut->avf;

libavformat/nutdec.c:790:5: 
788. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code)
789. {
790.     AVFormatContext *s = nut->avf;
         ^
791.     AVIOContext *bc    = s->pb;
792.     int size, stream_id, discard;

libavformat/nutdec.c:791:5: 
789. {
790.     AVFormatContext *s = nut->avf;
791.     AVIOContext *bc    = s->pb;
         ^
792.     int size, stream_id, discard;
793.     int64_t pts, last_IP_pts;

libavformat/nutdec.c:797:5: Skipping decode_frame_header(): empty list of specs
795.     uint8_t header_idx;
796. 
797.     size = decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
         ^
798.     if (size < 0)
799.         return size;

libavformat/nutdec.c:798:9: Taking false branch
796. 
797.     size = decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
798.     if (size < 0)
             ^
799.         return size;
800. 

libavformat/nutdec.c:801:5: 
799.         return size;
800. 
801.     stc = &nut->stream[stream_id];
         ^
802. 
803.     if (stc->last_flags & FLAG_KEY)

libavformat/nutdec.c:803:9: Taking true branch
801.     stc = &nut->stream[stream_id];
802. 
803.     if (stc->last_flags & FLAG_KEY)
             ^
804.         stc->skip_until_key_frame = 0;
805. 

libavformat/nutdec.c:804:9: 
802. 
803.     if (stc->last_flags & FLAG_KEY)
804.         stc->skip_until_key_frame = 0;
             ^
805. 
806.     discard     = s->streams[stream_id]->discard;

libavformat/nutdec.c:806:5: 
804.         stc->skip_until_key_frame = 0;
805. 
806.     discard     = s->streams[stream_id]->discard;
         ^
807.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||

libavformat/nutdec.c:807:5: 
805. 
806.     discard     = s->streams[stream_id]->discard;
807.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
         ^
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&

libavformat/nutdec.c:808:10: Taking false branch
806.     discard     = s->streams[stream_id]->discard;
807.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
              ^
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
810.          last_IP_pts > pts) ||

libavformat/nutdec.c:809:10: Taking true branch
807.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
              ^
810.          last_IP_pts > pts) ||
811.         discard >= AVDISCARD_ALL ||

libavformat/nutdec.c:809:41: Taking true branch
807.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
                                             ^
810.          last_IP_pts > pts) ||
811.         discard >= AVDISCARD_ALL ||

libavformat/nutdec.c:810:10: Taking false branch
808.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
810.          last_IP_pts > pts) ||
              ^
811.         discard >= AVDISCARD_ALL ||
812.         stc->skip_until_key_frame) {

libavformat/nutdec.c:811:9: Taking false branch
809.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
810.          last_IP_pts > pts) ||
811.         discard >= AVDISCARD_ALL ||
             ^
812.         stc->skip_until_key_frame) {
813.         avio_skip(bc, size);

libavformat/nutdec.c:812:9: Taking false branch
810.          last_IP_pts > pts) ||
811.         discard >= AVDISCARD_ALL ||
812.         stc->skip_until_key_frame) {
             ^
813.         avio_skip(bc, size);
814.         return 1;

libavformat/nutdec.c:817:5: 
815.     }
816. 
817.     av_new_packet(pkt, size + nut->header_len[header_idx]);
         ^
818.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
819.     pkt->pos = avio_tell(bc); // FIXME

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

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

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

libavcodec/avpacket.c:65:9: 
  63.     uint8_t *data = NULL;
  64.     if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  65.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
              ^
  66.     if (data) {
  67.         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:72:9: Taking false branch
    70. 
    71.     /* let's disallow possible ambiguous cases */
    72.     if (size > (INT_MAX-32) || !size)
                ^
    73.         return NULL;
    74. 

libavutil/mem.c:72:33: Taking true branch
    70. 
    71.     /* let's disallow possible ambiguous cases */
    72.     if (size > (INT_MAX-32) || !size)
                                        ^
    73.         return NULL;
    74. 

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

libavutil/mem.c:117:1: return from a call to av_malloc
    115. #endif
    116.     return ptr;
    117. }
         ^
    118. 
    119. void *av_realloc(void *ptr, size_t size)

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

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

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

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

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

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

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

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

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

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

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

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

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

libavcodec/avpacket.c:58:5: 
    56.     pkt->destruct             = NULL;
    57.     pkt->side_data            = NULL;
    58.     pkt->side_data_elems      = 0;
            ^
    59. }
    60. 

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

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

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

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

libavcodec/avpacket.c:75:10: Taking true branch
  73.     pkt->size     = size;
  74.     pkt->destruct = av_destruct_packet;
  75.     if (!data)
               ^
  76.         return AVERROR(ENOMEM);
  77.     return 0;

libavcodec/avpacket.c:76:9: 
  74.     pkt->destruct = av_destruct_packet;
  75.     if (!data)
  76.         return AVERROR(ENOMEM);
              ^
  77.     return 0;
  78. }

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

libavformat/nutdec.c:818:5: 
816. 
817.     av_new_packet(pkt, size + nut->header_len[header_idx]);
818.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
         ^
819.     pkt->pos = avio_tell(bc); // FIXME
820.     avio_read(bc, pkt->data + nut->header_len[header_idx], size);
