libavcodec/aac_parser.c:40: error: Null Dereference
  pointer `&bits->buffer` last assigned on line 38 could be null and is dereferenced by call to `get_bits()` at line 40, column 8.

libavcodec/aac_parser.c:30:1: start of procedure aac_sync()
28. #define AAC_HEADER_SIZE 7
29. 
30. static int aac_sync(uint64_t state, AACAC3ParseContext *hdr_info,
    ^
31.         int *need_next_header, int *new_frame_start)
32. {

libavcodec/aac_parser.c:37:5: Loop condition is false. Leaving loop
35.     uint8_t tmp[8];
36. 
37.     AV_WB64(tmp, state);
        ^
38.     init_get_bits(&bits, tmp+8-AAC_HEADER_SIZE, AAC_HEADER_SIZE * 8);
39. 

libavcodec/aac_parser.c:38:5: 
36. 
37.     AV_WB64(tmp, state);
38.     init_get_bits(&bits, tmp+8-AAC_HEADER_SIZE, AAC_HEADER_SIZE * 8);
        ^
39. 
40.     if(get_bits(&bits, 12) != 0xfff)

libavcodec/bitstream.h:745:1: start of procedure init_get_bits()
  743.  * @param bit_size the size of the buffer in bits
  744.  */
  745. static inline void init_get_bits(GetBitContext *s,
       ^
  746.                    const uint8_t *buffer, int bit_size)
  747. {

libavcodec/bitstream.h:748:5: 
  746.                    const uint8_t *buffer, int bit_size)
  747. {
  748.     int buffer_size= (bit_size+7)>>3;
           ^
  749.     if(buffer_size < 0 || bit_size < 0) {
  750.         buffer_size = bit_size = 0;

libavcodec/bitstream.h:749:8: Taking true branch
  747. {
  748.     int buffer_size= (bit_size+7)>>3;
  749.     if(buffer_size < 0 || bit_size < 0) {
              ^
  750.         buffer_size = bit_size = 0;
  751.         buffer = NULL;

libavcodec/bitstream.h:750:9: 
  748.     int buffer_size= (bit_size+7)>>3;
  749.     if(buffer_size < 0 || bit_size < 0) {
  750.         buffer_size = bit_size = 0;
               ^
  751.         buffer = NULL;
  752.     }

libavcodec/bitstream.h:751:9: 
  749.     if(buffer_size < 0 || bit_size < 0) {
  750.         buffer_size = bit_size = 0;
  751.         buffer = NULL;
               ^
  752.     }
  753. 

libavcodec/bitstream.h:754:5: 
  752.     }
  753. 
  754.     s->buffer= buffer;
           ^
  755.     s->size_in_bits= bit_size;
  756.     s->buffer_end= buffer + buffer_size;

libavcodec/bitstream.h:755:5: 
  753. 
  754.     s->buffer= buffer;
  755.     s->size_in_bits= bit_size;
           ^
  756.     s->buffer_end= buffer + buffer_size;
  757. #ifdef ALT_BITSTREAM_READER

libavcodec/bitstream.h:756:5: 
  754.     s->buffer= buffer;
  755.     s->size_in_bits= bit_size;
  756.     s->buffer_end= buffer + buffer_size;
           ^
  757. #ifdef ALT_BITSTREAM_READER
  758.     s->index=0;

libavcodec/bitstream.h:758:5: 
  756.     s->buffer_end= buffer + buffer_size;
  757. #ifdef ALT_BITSTREAM_READER
  758.     s->index=0;
           ^
  759. #elif defined LIBMPEG2_BITSTREAM_READER
  760.     s->buffer_ptr = (uint8_t*)((intptr_t)buffer&(~1));

libavcodec/bitstream.h:768:1: return from a call to init_get_bits
  766.     skip_bits_long(s, 0);
  767. #endif
  768. }
       ^
  769. 
  770. static inline void align_get_bits(GetBitContext *s)

libavcodec/aac_parser.c:40:8: 
38.     init_get_bits(&bits, tmp+8-AAC_HEADER_SIZE, AAC_HEADER_SIZE * 8);
39. 
40.     if(get_bits(&bits, 12) != 0xfff)
           ^
41.         return 0;
42. 

libavcodec/bitstream.h:642:1: start of procedure get_bits()
  640.  * Note, the alt bitstream reader can read up to 25 bits, but the libmpeg2 reader can't
  641.  */
  642. static inline unsigned int get_bits(GetBitContext *s, int n){
       ^
  643.     register int tmp;
  644.     OPEN_READER(re, s)

libavcodec/bitstream.h:644:5: 
  642. static inline unsigned int get_bits(GetBitContext *s, int n){
  643.     register int tmp;
  644.     OPEN_READER(re, s)
           ^
  645.     UPDATE_CACHE(re, s)
  646.     tmp= SHOW_UBITS(re, s, n);

libavcodec/bitstream.h:645:5: 
  643.     register int tmp;
  644.     OPEN_READER(re, s)
  645.     UPDATE_CACHE(re, s)
           ^
  646.     tmp= SHOW_UBITS(re, s, n);
  647.     LAST_SKIP_BITS(re, s, n)
