libavformat/nutdec.c:814: error: Null Dereference
  pointer `pkt->data` last assigned on line 813 could be null and is dereferenced by call to `memcpy()` at line 814, column 5.

libavformat/nutdec.c:784:1: start of procedure decode_frame()
782. }
783. 
784. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code)
     ^
785. {
786.     AVFormatContext *s = nut->avf;

libavformat/nutdec.c:786:5: 
784. static int decode_frame(NUTContext *nut, AVPacket *pkt, int frame_code)
785. {
786.     AVFormatContext *s = nut->avf;
         ^
787.     AVIOContext *bc    = s->pb;
788.     int size, stream_id, discard;

libavformat/nutdec.c:787:5: 
785. {
786.     AVFormatContext *s = nut->avf;
787.     AVIOContext *bc    = s->pb;
         ^
788.     int size, stream_id, discard;
789.     int64_t pts, last_IP_pts;

libavformat/nutdec.c:793:5: Skipping decode_frame_header(): empty list of specs
791.     uint8_t header_idx;
792. 
793.     size = decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
         ^
794.     if (size < 0)
795.         return size;

libavformat/nutdec.c:794:9: Taking false branch
792. 
793.     size = decode_frame_header(nut, &pts, &stream_id, &header_idx, frame_code);
794.     if (size < 0)
             ^
795.         return size;
796. 

libavformat/nutdec.c:797:5: 
795.         return size;
796. 
797.     stc = &nut->stream[stream_id];
         ^
798. 
799.     if (stc->last_flags & FLAG_KEY)

libavformat/nutdec.c:799:9: Taking true branch
797.     stc = &nut->stream[stream_id];
798. 
799.     if (stc->last_flags & FLAG_KEY)
             ^
800.         stc->skip_until_key_frame = 0;
801. 

libavformat/nutdec.c:800:9: 
798. 
799.     if (stc->last_flags & FLAG_KEY)
800.         stc->skip_until_key_frame = 0;
             ^
801. 
802.     discard     = s->streams[stream_id]->discard;

libavformat/nutdec.c:802:5: 
800.         stc->skip_until_key_frame = 0;
801. 
802.     discard     = s->streams[stream_id]->discard;
         ^
803.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||

libavformat/nutdec.c:803:5: 
801. 
802.     discard     = s->streams[stream_id]->discard;
803.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
         ^
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&

libavformat/nutdec.c:804:10: Taking false branch
802.     discard     = s->streams[stream_id]->discard;
803.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
              ^
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
806.          last_IP_pts > pts) ||

libavformat/nutdec.c:805:10: Taking true branch
803.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
              ^
806.          last_IP_pts > pts) ||
807.         discard >= AVDISCARD_ALL ||

libavformat/nutdec.c:805:41: Taking true branch
803.     last_IP_pts = s->streams[stream_id]->last_IP_pts;
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
                                             ^
806.          last_IP_pts > pts) ||
807.         discard >= AVDISCARD_ALL ||

libavformat/nutdec.c:806:10: Taking false branch
804.     if ((discard >= AVDISCARD_NONKEY && !(stc->last_flags & FLAG_KEY)) ||
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
806.          last_IP_pts > pts) ||
              ^
807.         discard >= AVDISCARD_ALL ||
808.         stc->skip_until_key_frame) {

libavformat/nutdec.c:807:9: Taking false branch
805.         (discard >= AVDISCARD_BIDIR  && last_IP_pts != AV_NOPTS_VALUE &&
806.          last_IP_pts > pts) ||
807.         discard >= AVDISCARD_ALL ||
             ^
808.         stc->skip_until_key_frame) {
809.         avio_skip(bc, size);

libavformat/nutdec.c:808:9: Taking false branch
806.          last_IP_pts > pts) ||
807.         discard >= AVDISCARD_ALL ||
808.         stc->skip_until_key_frame) {
             ^
809.         avio_skip(bc, size);
810.         return 1;

libavformat/nutdec.c:813:5: 
811.     }
812. 
813.     av_new_packet(pkt, size + nut->header_len[header_idx]);
         ^
814.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
815.     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:71:5: 
    69. #endif
    70. 
    71.     assert(size);
            ^
    72. 
    73.     /* let's disallow possible ambiguous cases */

libavutil/mem.c:74:9: Taking false branch
    72. 
    73.     /* let's disallow possible ambiguous cases */
    74.     if (size > (INT_MAX-32) || !size)
                ^
    75.         return NULL;
    76. 

libavutil/mem.c:74:33: Taking true branch
    72. 
    73.     /* let's disallow possible ambiguous cases */
    74.     if (size > (INT_MAX-32) || !size)
                                        ^
    75.         return NULL;
    76. 

libavutil/mem.c:75:9: 
    73.     /* let's disallow possible ambiguous cases */
    74.     if (size > (INT_MAX-32) || !size)
    75.         return NULL;
                ^
    76. 
    77. #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: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:814:5: 
812. 
813.     av_new_packet(pkt, size + nut->header_len[header_idx]);
814.     memcpy(pkt->data, nut->header[header_idx], nut->header_len[header_idx]);
         ^
815.     pkt->pos = avio_tell(bc); // FIXME
816.     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{\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 &&\n         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    assert(size);\n    if (size > (INT_MAX-32) || !size)\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}']