libavformat/rtsp.c:1871: error: Null Dereference
  pointer `content` last assigned on line 1865 could be null and is dereferenced at line 1871, column 5.

libavformat/rtsp.c:1852:1: start of procedure sdp_read_header()
1850. }
1851. 
1852. static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
      ^
1853. {
1854.     RTSPState *rt = s->priv_data;

libavformat/rtsp.c:1854:5: 
1852. static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1853. {
1854.     RTSPState *rt = s->priv_data;
          ^
1855.     RTSPStream *rtsp_st;
1856.     int size, i, err;

libavformat/rtsp.c:1860:10: 
1858.     char url[1024];
1859. 
1860.     if (!ff_network_init())
               ^
1861.         return AVERROR(EIO);
1862. 

libavformat/network.c:124:1: start of procedure ff_network_init()
  122. int ff_network_inited_globally;
  123. 
  124. int ff_network_init(void)
       ^
  125. {
  126. #if HAVE_WINSOCK2_H

libavformat/network.c:130:10: Taking true branch
  128. #endif
  129. 
  130.     if (!ff_network_inited_globally)
                ^
  131.         av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
  132.                                      "network initialization. Please use "

libavformat/network.c:131:9: Skipping av_log(): empty list of specs
  129. 
  130.     if (!ff_network_inited_globally)
  131.         av_log(NULL, AV_LOG_WARNING, "Using network protocols without global "
               ^
  132.                                      "network initialization. Please use "
  133.                                      "avformat_network_init(), this will "

libavformat/network.c:139:5: 
  137.         return 0;
  138. #endif
  139.     return 1;
           ^
  140. }
  141. 

libavformat/network.c:140:1: return from a call to ff_network_init
  138. #endif
  139.     return 1;
  140. }
       ^
  141. 
  142. int ff_network_wait_fd(int fd, int write)

libavformat/rtsp.c:1860:10: Taking false branch
1858.     char url[1024];
1859. 
1860.     if (!ff_network_init())
               ^
1861.         return AVERROR(EIO);
1862. 

libavformat/rtsp.c:1865:5: 
1863.     /* read the whole sdp file */
1864.     /* XXX: better loading */
1865.     content = av_malloc(SDP_MAX_SIZE);
          ^
1866.     size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1867.     if (size <= 0) {

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 false branch
  70. 
  71.     /* let's disallow possible ambiguous cases */
  72.     if(size > (INT_MAX-32) )
             ^
  73.         return NULL;
  74. 

libavutil/mem.c:83:9: Taking true branch
  81.     ((char*)ptr)[-1]= diff;
  82. #elif HAVE_POSIX_MEMALIGN
  83.     if (posix_memalign(&ptr,32,size))
              ^
  84.         ptr = NULL;
  85. #elif HAVE_MEMALIGN

libavutil/mem.c:84:9: 
  82. #elif HAVE_POSIX_MEMALIGN
  83.     if (posix_memalign(&ptr,32,size))
  84.         ptr = NULL;
              ^
  85. #elif HAVE_MEMALIGN
  86.     ptr = memalign(32,size);

libavutil/mem.c:114:5: 
  112.     ptr = malloc(size);
  113. #endif
  114.     return ptr;
           ^
  115. }
  116. 

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)

libavformat/rtsp.c:1866:5: Skipping avio_read(): empty list of specs
1864.     /* XXX: better loading */
1865.     content = av_malloc(SDP_MAX_SIZE);
1866.     size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
          ^
1867.     if (size <= 0) {
1868.         av_free(content);

libavformat/rtsp.c:1867:9: Taking false branch
1865.     content = av_malloc(SDP_MAX_SIZE);
1866.     size = avio_read(s->pb, content, SDP_MAX_SIZE - 1);
1867.     if (size <= 0) {
              ^
1868.         av_free(content);
1869.         return AVERROR_INVALIDDATA;

libavformat/rtsp.c:1871:5: 
1869.         return AVERROR_INVALIDDATA;
1870.     }
1871.     content[size] ='\0';
          ^
1872. 
1873.     err = ff_sdp_parse(s, content);
