--- branches/mit-integ/krb5/src/lib/krb5/keytab/kt_file.c	2006/07/06 13:47:57	573
+++ branches/mit-integ/krb5/src/lib/krb5/keytab/kt_file.c	2006/07/25 12:40:18	928
@@ -460,6 +460,10 @@
     kerror = KTLOCK(id);
     if (kerror)
 	return kerror;
+    if (KTFILEP(id) == NULL) {
+	KTUNLOCK(id);
+	return KRB5_KT_IOERR;
+    }
     if (fseek(KTFILEP(id), *fileoff, 0) == -1) {
 	KTUNLOCK(id);
 	return KRB5_KT_END;