1 files changed, 6 insertions, 6 deletions

diff --git a/sys/net/if_ethersubr.c b/sys/net/if_ethersubr.c
index 8dfb5fbdcea1..bb2bbd654291 100644
--- a/sys/net/if_ethersubr.c
+++ b/sys/net/if_ethersubr.c
@@ -281,13 +281,13 @@ ether_output(ifp, m, dst, rt0)
 
 		if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
 			struct mbuf *n;
-			n = m_copy(m, 0, (int)M_COPYALL);
 
-			n->m_pkthdr.csum_flags |= csum_flags;
-			if (csum_flags & CSUM_DATA_VALID)
-				n->m_pkthdr.csum_data = 0xffff;
-
-			(void) if_simloop(ifp, n, dst->sa_family, hlen);
+			if ((n = m_copy(m, 0, (int)M_COPYALL)) != NULL) {
+				n->m_pkthdr.csum_flags |= csum_flags;
+				if (csum_flags & CSUM_DATA_VALID)
+					n->m_pkthdr.csum_data = 0xffff;
+				(void)if_simloop(ifp, n, dst->sa_family, hlen);
+			}
 		} else if (bcmp(eh->ether_dhost, eh->ether_shost,
 				ETHER_ADDR_LEN) == 0) {
 			m->m_pkthdr.csum_flags |= csum_flags;