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Fail early when trying to identify a pppoe interface softc (from a

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HOST UNIQUE token) and our list of interfaces is empty. Without this
test an unitinalized pointer may be dereferenced.
This commit is contained in:
martin 2001-12-01 18:25:23 +00:00
parent 700b43b275
commit 6e766675c6
1 changed files with 5 additions and 2 deletions
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7
sys/net/if_pppoe.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_pppoe.c,v 1.8 2001/11/13 00:49:35 lukem Exp $ */
/* $NetBSD: if_pppoe.c,v 1.9 2001/12/01 18:25:23 martin Exp $ */
/*
* Copyright (c) 2001 Martin Husemann. All rights reserved.
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_pppoe.c,v 1.8 2001/11/13 00:49:35 lukem Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_pppoe.c,v 1.9 2001/12/01 18:25:23 martin Exp $");
#include "pppoe.h"
#include "bpfilter.h"
@ -276,6 +276,9 @@ static struct pppoe_softc *
pppoe_find_softc_by_hunique(u_int8_t *token, size_t len, struct ifnet *rcvif)
{
struct pppoe_softc *sc, *t;
if (LIST_EMPTY(&pppoe_softc_list)) return NULL;
if (len != sizeof sc) return NULL;
memcpy(&t, token, len);