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Add missing NULL check 

PR kern/52554
This commit is contained in:
ozaki-r 2017-10-05 03:42:14 +00:00
parent 7f18730033
commit 6bf0e671a0
1 changed files with 7 additions and 2 deletions
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9
sys/netinet6/nd6.c
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@ -1,4 +1,4 @@
/* $NetBSD: nd6.c,v 1.235 2017/06/22 09:24:02 ozaki-r Exp $ */
/* $NetBSD: nd6.c,v 1.236 2017/10/05 03:42:14 ozaki-r Exp $ */
/* $KAME: nd6.c,v 1.279 2002/06/08 11:16:51 itojun Exp $ */
/*
@ -31,7 +31,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.235 2017/06/22 09:24:02 ozaki-r Exp $");
__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.236 2017/10/05 03:42:14 ozaki-r Exp $");
#ifdef _KERNEL_OPT
#include "opt_net_mpsafe.h"
@ -2321,6 +2321,11 @@ nd6_resolve(struct ifnet *ifp, const struct rtentry *rt, struct mbuf *m,
created = true;
}
if (ln == NULL) {
m_freem(m);
return ENETDOWN; /* better error? */
}
LLE_WLOCK_ASSERT(ln);
/* We don't have to do link-layer address resolution on a p2p link. */