libavresample/audio_mix.c:404: error: Buffer Overrun L3
  Offset added: 256 Size: [0, +oo].

libavresample/audio_mix.c:392:1: <Length trace>
390. }
391. 
392. void ff_audio_mix_free(AudioMix **am_p)
     ^
393. {
394.     AudioMix *am;

libavresample/audio_mix.c:392:1: Parameter `(*am_p)->matrix_q8[*]`
390. }
391. 
392. void ff_audio_mix_free(AudioMix **am_p)
     ^
393. {
394.     AudioMix *am;

libavresample/audio_mix.c:404:5: Array access: Offset added: 256 Size: [0, +oo]
402.         am->matrix = NULL;
403.     }
404.     memset(am->matrix_q8,  0, sizeof(am->matrix_q8 ));
         ^
405.     memset(am->matrix_q15, 0, sizeof(am->matrix_q15));
406.     memset(am->matrix_flt, 0, sizeof(am->matrix_flt));
