libavcodec/opus_celt.c:1770: error: Buffer Overrun L3
  Offset added: 12 Size: [0, +oo].

libavcodec/opus_celt.c:1763:1: <Length trace>
1761. }
1762. 
1763. static void celt_postfilter(CeltContext *s, CeltFrame *frame)
      ^
1764. {
1765.     int len = s->blocksize * s->blocks;

libavcodec/opus_celt.c:1763:1: Parameter `frame->pf_gains[*]`
1761. }
1762. 
1763. static void celt_postfilter(CeltContext *s, CeltFrame *frame)
      ^
1764. {
1765.     int len = s->blocksize * s->blocks;

libavcodec/opus_celt.c:1770:5: Array access: Offset added: 12 Size: [0, +oo]
1768. 
1769.     frame->pf_period_old = frame->pf_period;
1770.     memcpy(frame->pf_gains_old, frame->pf_gains, sizeof(frame->pf_gains));
          ^
1771. 
1772.     frame->pf_period = frame->pf_period_new;
