libavformat/rtsp.c:1752: error: Null Dereference
  pointer `content` last assigned on line 1746 could be null and is dereferenced at line 1752, column 5.

libavformat/rtsp.c:1735:1: start of procedure sdp_read_header()
1733. #define SDP_MAX_SIZE 8192
1734. 
1735. static int sdp_read_header(AVFormatContext *s,
      ^
1736.                            AVFormatParameters *ap)
1737. {

libavformat/rtsp.c:1738:5: 
1736.                            AVFormatParameters *ap)
1737. {
1738.     RTSPState *rt = s->priv_data;
          ^
1739.     RTSPStream *rtsp_st;
1740.     int size, i, err;

libavformat/rtsp.c:1746:5: 
1744.     /* read the whole sdp file */
1745.     /* XXX: better loading */
1746.     content = av_malloc(SDP_MAX_SIZE);
          ^
1747.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1748.     if (size <= 0) {

libavutil/mem.c:47:1: start of procedure av_malloc()
  45.    linker will do it automatically. */
  46. 
  47. void *av_malloc(unsigned int size)
      ^
  48. {
  49.     void *ptr = NULL;

libavutil/mem.c:49:5: 
  47. void *av_malloc(unsigned int size)
  48. {
  49.     void *ptr = NULL;
          ^
  50. #if CONFIG_MEMALIGN_HACK
  51.     long diff;

libavutil/mem.c:55:8: Taking false branch
  53. 
  54.     /* let's disallow possible ambiguous cases */
  55.     if(size > (INT_MAX-16) )
             ^
  56.         return NULL;
  57. 

libavutil/mem.c:66:9: Taking true branch
  64.     ((char*)ptr)[-1]= diff;
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
              ^
  67.         ptr = NULL;
  68. #elif HAVE_MEMALIGN

libavutil/mem.c:67:9: 
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
  67.         ptr = NULL;
              ^
  68. #elif HAVE_MEMALIGN
  69.     ptr = memalign(16,size);

libavutil/mem.c:99:5: 
   97.     ptr = malloc(size);
   98. #endif
   99.     return ptr;
           ^
  100. }
  101. 

libavutil/mem.c:100:1: return from a call to av_malloc
   98. #endif
   99.     return ptr;
  100. }
       ^
  101. 
  102. void *av_realloc(void *ptr, unsigned int size)

libavformat/rtsp.c:1747:5: Skipping get_buffer(): empty list of specs
1745.     /* XXX: better loading */
1746.     content = av_malloc(SDP_MAX_SIZE);
1747.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
          ^
1748.     if (size <= 0) {
1749.         av_free(content);

libavformat/rtsp.c:1748:9: Taking false branch
1746.     content = av_malloc(SDP_MAX_SIZE);
1747.     size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1748.     if (size <= 0) {
              ^
1749.         av_free(content);
1750.         return AVERROR_INVALIDDATA;

libavformat/rtsp.c:1752:5: 
1750.         return AVERROR_INVALIDDATA;
1751.     }
1752.     content[size] ='\0';
          ^
1753. 
1754.     sdp_parse(s, content);
