libavformat/rtpdec_h264.c:192: error: Null Dereference
  pointer `pkt->data` last assigned on line 191 could be null and is dereferenced by call to `memcpy()` at line 192, column 9.

libavformat/rtpdec_h264.c:166:1: start of procedure h264_handle_packet()
164. 
165. // return 0 on packet, no more left, 1 on packet, 1 on partial packet
166. static int h264_handle_packet(AVFormatContext *ctx, PayloadContext *data,
     ^
167.                               AVStream *st, AVPacket *pkt, uint32_t *timestamp,
168.                               const uint8_t *buf, int len, int flags)

libavformat/rtpdec_h264.c:172:5: 
170.     uint8_t nal;
171.     uint8_t type;
172.     int result = 0;
         ^
173. 
174.     if (!len) {

libavformat/rtpdec_h264.c:174:10: Taking false branch
172.     int result = 0;
173. 
174.     if (!len) {
              ^
175.         av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\n");
176.         return AVERROR_INVALIDDATA;

libavformat/rtpdec_h264.c:178:5: 
176.         return AVERROR_INVALIDDATA;
177.     }
178.     nal  = buf[0];
         ^
179.     type = nal & 0x1f;
180. 

libavformat/rtpdec_h264.c:179:5: 
177.     }
178.     nal  = buf[0];
179.     type = nal & 0x1f;
         ^
180. 
181.     assert(data);

libavformat/rtpdec_h264.c:181:5: 
179.     type = nal & 0x1f;
180. 
181.     assert(data);
         ^
182.     assert(buf);
183. 

libavformat/rtpdec_h264.c:182:5: 
180. 
181.     assert(data);
182.     assert(buf);
         ^
183. 
184.     /* Simplify the case (these are all the nal types used internally by

libavformat/rtpdec_h264.c:186:9: Taking true branch
184.     /* Simplify the case (these are all the nal types used internally by
185.      * the h264 codec). */
186.     if (type >= 1 && type <= 23)
             ^
187.         type = 1;
188.     switch (type) {

libavformat/rtpdec_h264.c:186:22: Taking true branch
184.     /* Simplify the case (these are all the nal types used internally by
185.      * the h264 codec). */
186.     if (type >= 1 && type <= 23)
                          ^
187.         type = 1;
188.     switch (type) {

libavformat/rtpdec_h264.c:187:9: 
185.      * the h264 codec). */
186.     if (type >= 1 && type <= 23)
187.         type = 1;
             ^
188.     switch (type) {
189.     case 0:                    // undefined, but pass them through

libavformat/rtpdec_h264.c:188:5: 
186.     if (type >= 1 && type <= 23)
187.         type = 1;
188.     switch (type) {
         ^
189.     case 0:                    // undefined, but pass them through
190.     case 1:

libavformat/rtpdec_h264.c:189:5: Switch condition is false. Skipping switch case
187.         type = 1;
188.     switch (type) {
189.     case 0:                    // undefined, but pass them through
         ^
190.     case 1:
191.         av_new_packet(pkt, len + sizeof(start_sequence));

libavformat/rtpdec_h264.c:190:5: Switch condition is true. Entering switch case
188.     switch (type) {
189.     case 0:                    // undefined, but pass them through
190.     case 1:
         ^
191.         av_new_packet(pkt, len + sizeof(start_sequence));
192.         memcpy(pkt->data, start_sequence, sizeof(start_sequence));

libavformat/rtpdec_h264.c:191:9: 
189.     case 0:                    // undefined, but pass them through
190.     case 1:
191.         av_new_packet(pkt, len + sizeof(start_sequence));
             ^
192.         memcpy(pkt->data, start_sequence, sizeof(start_sequence));
193.         memcpy(pkt->data + sizeof(start_sequence), buf, len);

libavcodec/avpacket.c:56:1: start of procedure av_new_packet()
  54. }
  55. 
  56. int av_new_packet(AVPacket *pkt, int size)
      ^
  57. {
  58.     uint8_t *data = NULL;

libavcodec/avpacket.c:58:5: 
  56. int av_new_packet(AVPacket *pkt, int size)
  57. {
  58.     uint8_t *data = NULL;
          ^
  59.     if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  60.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);

libavcodec/avpacket.c:59:9: Taking true branch
  57. {
  58.     uint8_t *data = NULL;
  59.     if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
              ^
  60.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  61.     if (data) {

libavcodec/avpacket.c:60:9: 
  58.     uint8_t *data = NULL;
  59.     if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  60.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
              ^
  61.     if (data) {
  62.         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 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:61:9: Taking false branch
  59.     if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
  60.         data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
  61.     if (data) {
              ^
  62.         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
  63.     } else

libavcodec/avpacket.c:64:9: 
  62.         memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
  63.     } else
  64.         size = 0;
              ^
  65. 
  66.     av_init_packet(pkt);

libavcodec/avpacket.c:66:5: 
  64.         size = 0;
  65. 
  66.     av_init_packet(pkt);
          ^
  67.     pkt->data     = data;
  68.     pkt->size     = size;

libavcodec/avpacket.c:42:1: start of procedure av_init_packet()
    40. }
    41. 
    42. void av_init_packet(AVPacket *pkt)
        ^
    43. {
    44.     pkt->pts                  = AV_NOPTS_VALUE;

libavcodec/avpacket.c:44:5: 
    42. void av_init_packet(AVPacket *pkt)
    43. {
    44.     pkt->pts                  = AV_NOPTS_VALUE;
            ^
    45.     pkt->dts                  = AV_NOPTS_VALUE;
    46.     pkt->pos                  = -1;

libavcodec/avpacket.c:45:5: 
    43. {
    44.     pkt->pts                  = AV_NOPTS_VALUE;
    45.     pkt->dts                  = AV_NOPTS_VALUE;
            ^
    46.     pkt->pos                  = -1;
    47.     pkt->duration             = 0;

libavcodec/avpacket.c:46:5: 
    44.     pkt->pts                  = AV_NOPTS_VALUE;
    45.     pkt->dts                  = AV_NOPTS_VALUE;
    46.     pkt->pos                  = -1;
            ^
    47.     pkt->duration             = 0;
    48.     pkt->convergence_duration = 0;

libavcodec/avpacket.c:47:5: 
    45.     pkt->dts                  = AV_NOPTS_VALUE;
    46.     pkt->pos                  = -1;
    47.     pkt->duration             = 0;
            ^
    48.     pkt->convergence_duration = 0;
    49.     pkt->flags                = 0;

libavcodec/avpacket.c:48:5: 
    46.     pkt->pos                  = -1;
    47.     pkt->duration             = 0;
    48.     pkt->convergence_duration = 0;
            ^
    49.     pkt->flags                = 0;
    50.     pkt->stream_index         = 0;

libavcodec/avpacket.c:49:5: 
    47.     pkt->duration             = 0;
    48.     pkt->convergence_duration = 0;
    49.     pkt->flags                = 0;
            ^
    50.     pkt->stream_index         = 0;
    51.     pkt->destruct             = NULL;

libavcodec/avpacket.c:50:5: 
    48.     pkt->convergence_duration = 0;
    49.     pkt->flags                = 0;
    50.     pkt->stream_index         = 0;
            ^
    51.     pkt->destruct             = NULL;
    52.     pkt->side_data            = NULL;

libavcodec/avpacket.c:51:5: 
    49.     pkt->flags                = 0;
    50.     pkt->stream_index         = 0;
    51.     pkt->destruct             = NULL;
            ^
    52.     pkt->side_data            = NULL;
    53.     pkt->side_data_elems      = 0;

libavcodec/avpacket.c:52:5: 
    50.     pkt->stream_index         = 0;
    51.     pkt->destruct             = NULL;
    52.     pkt->side_data            = NULL;
            ^
    53.     pkt->side_data_elems      = 0;
    54. }

libavcodec/avpacket.c:53:5: 
    51.     pkt->destruct             = NULL;
    52.     pkt->side_data            = NULL;
    53.     pkt->side_data_elems      = 0;
            ^
    54. }
    55. 

libavcodec/avpacket.c:54:1: return from a call to av_init_packet
    52.     pkt->side_data            = NULL;
    53.     pkt->side_data_elems      = 0;
    54. }
        ^
    55. 
    56. int av_new_packet(AVPacket *pkt, int size)

libavcodec/avpacket.c:67:5: 
  65. 
  66.     av_init_packet(pkt);
  67.     pkt->data     = data;
          ^
  68.     pkt->size     = size;
  69.     pkt->destruct = av_destruct_packet;

libavcodec/avpacket.c:68:5: 
  66.     av_init_packet(pkt);
  67.     pkt->data     = data;
  68.     pkt->size     = size;
          ^
  69.     pkt->destruct = av_destruct_packet;
  70.     if (!data)

libavcodec/avpacket.c:69:5: 
  67.     pkt->data     = data;
  68.     pkt->size     = size;
  69.     pkt->destruct = av_destruct_packet;
          ^
  70.     if (!data)
  71.         return AVERROR(ENOMEM);

libavcodec/avpacket.c:70:10: Taking true branch
  68.     pkt->size     = size;
  69.     pkt->destruct = av_destruct_packet;
  70.     if (!data)
               ^
  71.         return AVERROR(ENOMEM);
  72.     return 0;

libavcodec/avpacket.c:71:9: 
  69.     pkt->destruct = av_destruct_packet;
  70.     if (!data)
  71.         return AVERROR(ENOMEM);
              ^
  72.     return 0;
  73. }

libavcodec/avpacket.c:73:1: return from a call to av_new_packet
  71.         return AVERROR(ENOMEM);
  72.     return 0;
  73. }
      ^
  74. 
  75. void av_shrink_packet(AVPacket *pkt, int size)

libavformat/rtpdec_h264.c:192:9: 
190.     case 1:
191.         av_new_packet(pkt, len + sizeof(start_sequence));
192.         memcpy(pkt->data, start_sequence, sizeof(start_sequence));
             ^
193.         memcpy(pkt->data + sizeof(start_sequence), buf, len);
194.         COUNT_NAL_TYPE(data, nal);

static int h264_handle_packet(AVFormatContext *ctx, PayloadContext *data,
                              AVStream *st, AVPacket *pkt, uint32_t *timestamp,
                              const uint8_t *buf, int len, int flags)
{
    uint8_t nal;
    uint8_t type;
    int result = 0;
    if (!len) {
        av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\n");
        return AVERROR_INVALIDDATA;
    }
    nal  = buf[0];
    type = nal & 0x1f;
    assert(data);
    assert(buf);
    if (type >= 1 && type <= 23)
        type = 1;
    switch (type) {
    case 0:
    case 1:
        av_new_packet(pkt, len + sizeof(start_sequence));
        memcpy(pkt->data, start_sequence, sizeof(start_sequence));
        memcpy(pkt->data + sizeof(start_sequence), buf, len);
        COUNT_NAL_TYPE(data, nal);
        break;
    case 24:
        buf++;
        len--;
        {
            int pass         = 0;
            int total_length = 0;
            uint8_t *dst     = NULL;
            for (pass = 0; pass < 2; pass++) {
                const uint8_t *src = buf;
                int src_len        = len;
                while (src_len > 2) {
                    uint16_t nal_size = AV_RB16(src);
                    src     += 2;
                    src_len -= 2;
                    if (nal_size <= src_len) {
                        if (pass == 0) {
                            total_length += sizeof(start_sequence) + nal_size;
                        } else {
                            assert(dst);
                            memcpy(dst, start_sequence, sizeof(start_sequence));
                            dst += sizeof(start_sequence);
                            memcpy(dst, src, nal_size);
                            COUNT_NAL_TYPE(data, *src);
                            dst += nal_size;
                        }
                    } else {
                        av_log(ctx, AV_LOG_ERROR,
                               "nal size exceeds length: %d %d\n", nal_size, src_len);
                    }
                    src     += nal_size;
                    src_len -= nal_size;
                    if (src_len < 0)
                        av_log(ctx, AV_LOG_ERROR,
                               "Consumed more bytes than we got! (%d)\n", src_len);
                }
                if (pass == 0) {
                    av_new_packet(pkt, total_length);
                    dst = pkt->data;
                } else {
                    assert(dst - pkt->data == total_length);
                }
            }
        }
        break;
    case 25:
    case 26:
    case 27:
    case 29:
        av_log(ctx, AV_LOG_ERROR,
               "Unhandled type (%d) (See RFC for implementation details\n",
               type);
        result = AVERROR(ENOSYS);
        break;
    case 28:
        buf++;
        len--;
        if (len > 1) {
            uint8_t fu_indicator      = nal;
            uint8_t fu_header         = *buf;
            uint8_t start_bit         = fu_header >> 7;
            uint8_t av_unused end_bit = (fu_header & 0x40) >> 6;
            uint8_t nal_type          = fu_header & 0x1f;
            uint8_t reconstructed_nal;
            reconstructed_nal  = fu_indicator & 0xe0;
            reconstructed_nal |= nal_type;
            buf++;
            len--;
            if (start_bit)
                COUNT_NAL_TYPE(data, nal_type);
            if (start_bit) {
                av_new_packet(pkt, sizeof(start_sequence) + sizeof(nal) + len);
                memcpy(pkt->data, start_sequence, sizeof(start_sequence));
                pkt->data[sizeof(start_sequence)] = reconstructed_nal;
                memcpy(pkt->data + sizeof(start_sequence) + sizeof(nal), buf, len);
            } else {
                av_new_packet(pkt, len);
                memcpy(pkt->data, buf, len);
            }
        } else {
            av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H264 RTP packet\n");
            result = AVERROR_INVALIDDATA;
        }
        break;
    case 30:
    case 31:
    default:
        av_log(ctx, AV_LOG_ERROR, "Undefined type (%d)\n", type);
        result = AVERROR_INVALIDDATA;
        break;
    }
    pkt->stream_index = st->index;
    return result;
}
['static int h264_handle_packet(AVFormatContext *ctx, PayloadContext *data,\n                              AVStream *st, AVPacket *pkt, uint32_t *timestamp,\n                              const uint8_t *buf, int len, int flags)\n{\n    uint8_t nal;\n    uint8_t type;\n    int result = 0;\n    if (!len) {\n        av_log(ctx, AV_LOG_ERROR, "Empty H264 RTP packet\\n");\n        return AVERROR_INVALIDDATA;\n    }\n    nal  = buf[0];\n    type = nal & 0x1f;\n    assert(data);\n    assert(buf);\n    if (type >= 1 && type <= 23)\n        type = 1;\n    switch (type) {\n    case 0:\n    case 1:\n        av_new_packet(pkt, len + sizeof(start_sequence));\n        memcpy(pkt->data, start_sequence, sizeof(start_sequence));\n        memcpy(pkt->data + sizeof(start_sequence), buf, len);\n        COUNT_NAL_TYPE(data, nal);\n        break;\n    case 24:\n        buf++;\n        len--;\n        {\n            int pass         = 0;\n            int total_length = 0;\n            uint8_t *dst     = NULL;\n            for (pass = 0; pass < 2; pass++) {\n                const uint8_t *src = buf;\n                int src_len        = len;\n                while (src_len > 2) {\n                    uint16_t nal_size = AV_RB16(src);\n                    src     += 2;\n                    src_len -= 2;\n                    if (nal_size <= src_len) {\n                        if (pass == 0) {\n                            total_length += sizeof(start_sequence) + nal_size;\n                        } else {\n                            assert(dst);\n                            memcpy(dst, start_sequence, sizeof(start_sequence));\n                            dst += sizeof(start_sequence);\n                            memcpy(dst, src, nal_size);\n                            COUNT_NAL_TYPE(data, *src);\n                            dst += nal_size;\n                        }\n                    } else {\n                        av_log(ctx, AV_LOG_ERROR,\n                               "nal size exceeds length: %d %d\\n", nal_size, src_len);\n                    }\n                    src     += nal_size;\n                    src_len -= nal_size;\n                    if (src_len < 0)\n                        av_log(ctx, AV_LOG_ERROR,\n                               "Consumed more bytes than we got! (%d)\\n", src_len);\n                }\n                if (pass == 0) {\n                    av_new_packet(pkt, total_length);\n                    dst = pkt->data;\n                } else {\n                    assert(dst - pkt->data == total_length);\n                }\n            }\n        }\n        break;\n    case 25:\n    case 26:\n    case 27:\n    case 29:\n        av_log(ctx, AV_LOG_ERROR,\n               "Unhandled type (%d) (See RFC for implementation details\\n",\n               type);\n        result = AVERROR(ENOSYS);\n        break;\n    case 28:\n        buf++;\n        len--;\n        if (len > 1) {\n            uint8_t fu_indicator      = nal;\n            uint8_t fu_header         = *buf;\n            uint8_t start_bit         = fu_header >> 7;\n            uint8_t av_unused end_bit = (fu_header & 0x40) >> 6;\n            uint8_t nal_type          = fu_header & 0x1f;\n            uint8_t reconstructed_nal;\n            reconstructed_nal  = fu_indicator & 0xe0;\n            reconstructed_nal |= nal_type;\n            buf++;\n            len--;\n            if (start_bit)\n                COUNT_NAL_TYPE(data, nal_type);\n            if (start_bit) {\n                av_new_packet(pkt, sizeof(start_sequence) + sizeof(nal) + len);\n                memcpy(pkt->data, start_sequence, sizeof(start_sequence));\n                pkt->data[sizeof(start_sequence)] = reconstructed_nal;\n                memcpy(pkt->data + sizeof(start_sequence) + sizeof(nal), buf, len);\n            } else {\n                av_new_packet(pkt, len);\n                memcpy(pkt->data, buf, len);\n            }\n        } else {\n            av_log(ctx, AV_LOG_ERROR, "Too short data for FU-A H264 RTP packet\\n");\n            result = AVERROR_INVALIDDATA;\n        }\n        break;\n    case 30:\n    case 31:\n    default:\n        av_log(ctx, AV_LOG_ERROR, "Undefined type (%d)\\n", type);\n        result = AVERROR_INVALIDDATA;\n        break;\n    }\n    pkt->stream_index = st->index;\n    return result;\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) || !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_ALIGNED_MALLOC\n    ptr = _aligned_malloc(size, 32);\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}']