diff -ru libvorbis-1.3.5.orig/lib/info.c libvorbis-1.3.5/lib/info.c

--- libvorbis-1.3.5.orig/lib/info.c	2015-02-26 22:58:19.000000000 +0100

+++ libvorbis-1.3.5/lib/info.c	2018-02-27 16:47:27.373883142 +0100

@@ -583,7 +583,8 @@

   oggpack_buffer opb;

   private_state *b=v->backend_state;

-  if(!b||vi->channels<=0){

+  if(!b||vi->channels<=0||vi->channels>256){

+    b = NULL;

     ret=OV_EFAULT;

     goto err_out;

   }

diff -ru libvorbis-1.3.5.orig/lib/psy.c libvorbis-1.3.5/lib/psy.c

--- libvorbis-1.3.5.orig/lib/psy.c	2013-11-12 05:01:54.000000000 +0100

+++ libvorbis-1.3.5/lib/psy.c	2018-02-27 16:47:58.285637422 +0100

@@ -600,7 +600,7 @@

     XY[i] = tXY;

   }

-  for (i = 0, x = 0.f;; i++, x += 1.f) {

+  for (i = 0, x = 0.f; i < n; i++, x += 1.f) {

     lo = b[i] >> 16;

     if( lo>=0 ) break;

@@ -622,12 +622,11 @@

     noise[i] = R - offset;

   }

-  for ( ;; i++, x += 1.f) {

+  for ( ; i < n; i++, x += 1.f) {

     lo = b[i] >> 16;

     hi = b[i] & 0xffff;

     if(hi>=n)break;

-

     tN = N[hi] - N[lo];

     tX = X[hi] - X[lo];

     tXX = XX[hi] - XX[lo];

@@ -652,7 +651,7 @@

   if (fixed <= 0) return;

-  for (i = 0, x = 0.f;; i++, x += 1.f) {

+  for (i = 0, x = 0.f; i < n; i++, x += 1.f) {

     hi = i + fixed / 2;

     lo = hi - fixed;

     if(lo>=0)break;

@@ -671,7 +670,7 @@

     if (R - offset < noise[i]) noise[i] = R - offset;

   }

-  for ( ;; i++, x += 1.f) {

+  for ( ; i < n; i++, x += 1.f) {

     hi = i + fixed / 2;

     lo = hi - fixed;