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Fix panic on receiving an ARP request

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The panic happened if an ARP request has a spa (i.e., IP address) whose
ARP entry already exists in the table as a static ARP entry.
This commit is contained in:
ozaki-r 2016-04-18 02:24:42 +00:00
parent 4ace575dc7
commit 805fe96546
1 changed files with 6 additions and 5 deletions
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11
sys/netinet/if_arp.c
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@ -1,4 +1,4 @@
/* $NetBSD: if_arp.c,v 1.206 2016/04/13 00:47:01 ozaki-r Exp $ */
/* $NetBSD: if_arp.c,v 1.207 2016/04/18 02:24:42 ozaki-r Exp $ */
/*-
* Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@ -68,7 +68,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.206 2016/04/13 00:47:01 ozaki-r Exp $");
__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.207 2016/04/18 02:24:42 ozaki-r Exp $");
#ifdef _KERNEL_OPT
#include "opt_ddb.h"
@ -1223,10 +1223,11 @@ in_arpinput(struct mbuf *m)
KASSERT(sizeof(la->ll_addr) >= ifp->if_addrlen);
(void)memcpy(&la->ll_addr, ar_sha(ah), ifp->if_addrlen);
la->la_flags |= LLE_VALID;
la->la_expire = time_uptime + arpt_keep;
if ((la->la_flags & LLE_STATIC) == 0) {
la->la_expire = time_uptime + arpt_keep;
arp_settimer(la, arpt_keep);
}
la->la_asked = 0;
KASSERT((la->la_flags & LLE_STATIC) == 0);
arp_settimer(la, arpt_keep);
/* rt->rt_flags &= ~RTF_REJECT; */
if (la->la_hold != NULL) {