libavcodec/h264_parser.c:260: error: Buffer Overrun L3
  Offset: [-1, +oo] Size: 16 by call to `ff_h264_decode_extradata`.

libavcodec/h264_parser.c:260:13: Call
258.             if (!avctx->has_b_frames)
259.                 h->s.low_delay = 1;
260.             ff_h264_decode_extradata(h);
                 ^
261.         }
262.     }

libavcodec/h264.c:1026:1: Parameter `h->s.slice_context_count`
  1024. }
  1025. 
  1026. int ff_h264_decode_extradata(H264Context *h)
        ^
  1027. {
  1028.     AVCodecContext *avctx = h->s.avctx;

libavcodec/h264.c:1074:13: Call
  1072.     } else {
  1073.         h->is_avc = 0;
  1074.         if (decode_nal_units(h, avctx->extradata, avctx->extradata_size, 1) < 0)
                    ^
  1075.             return -1;
  1076.     }

libavcodec/h264.c:3909:9: Assignment
    3907.     for (; pass <= 1; pass++) {
    3908.         buf_index     = 0;
    3909.         context_count = 0;
                  ^
    3910.         next_avc      = h->is_avc ? 0 : buf_size;
    3911.         nal_index     = 0;

libavcodec/h264.c:4151:17: Call
    4149. 
    4150.             if (context_count == h->max_contexts) {
    4151.                 execute_decode_slices(h, context_count);
                          ^
    4152.                 context_count = 0;
    4153.             }

libavcodec/h264.c:3851:1: <Offset trace>
3849.  * @param context_count number of contexts to execute
3850.  */
3851. static int execute_decode_slices(H264Context *h, int context_count)
      ^
3852. {
3853.     MpegEncContext *const s     = &h->s;

libavcodec/h264.c:3851:1: Parameter `context_count`
      3849.  * @param context_count number of contexts to execute
      3850.  */
      3851. static int execute_decode_slices(H264Context *h, int context_count)
            ^
      3852. {
      3853.     MpegEncContext *const s     = &h->s;

libavcodec/h264.c:3851:1: <Length trace>
3849.  * @param context_count number of contexts to execute
3850.  */
3851. static int execute_decode_slices(H264Context *h, int context_count)
      ^
3852. {
3853.     MpegEncContext *const s     = &h->s;

libavcodec/h264.c:3851:1: Parameter `h->thread_context[*]`
      3849.  * @param context_count number of contexts to execute
      3850.  */
      3851. static int execute_decode_slices(H264Context *h, int context_count)
            ^
      3852. {
      3853.     MpegEncContext *const s     = &h->s;

libavcodec/h264.c:3874:32: Array access: Offset: [-1, +oo] Size: 16 by call to `ff_h264_decode_extradata` 
      3872. 
      3873.         /* pull back stuff from slices to master context */
      3874.         hx                   = h->thread_context[context_count - 1];
                                           ^
      3875.         s->mb_x              = hx->s.mb_x;
      3876.         s->mb_y              = hx->s.mb_y;
