1 files changed, 2 insertions, 0 deletions
diff --git a/filter/filter.c b/filter/filter.c
index 3df0f0c6..9617482a 100644
--- a/filter/filter.c
+++ b/filter/filter.c
@@ -702,6 +702,8 @@ interpret(struct f_inst *what)
     ONEARG;
     if (v1.type != T_INT)
       runtime( "Can't set preference to non-integer" );
+    if ((v1.val.i < 0) || (v1.val.i > 0xFFFF))
+      runtime( "Setting preference value out of bounds" );
     *f_rte = rte_cow(*f_rte);
     (*f_rte)->pref = v1.val.i;
     break;