--- mpg123/layer2.c.orig	2004-09-14 17:15:48.000000000 -0400
+++ mpg123/layer2.c	2004-09-14 17:18:49.000000000 -0400
@@ -287,6 +287,12 @@
   fr->jsbound = (fr->mode == MPG_MD_JOINT_STEREO) ?
      (fr->mode_ext<<2)+4 : fr->II_sblimit;
 
+  /* security fix. */
+  if (fr->jsbound > fr->II_sblimit) {
+    fprintf(stderr, "Truncating stereo boundary to sideband limit.\n");
+    fr->jsbound=fr->II_sblimit;
+  }
+
   if(stereo == 1 || single == 3)
     single = 0;