netipsec key_register: check for M_NOWAIT alloc failure

Reviewed by: ae, cem Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D20742
flimberger · Jun 25, 2019 · 1658622 · 1658622
1 parent da919cc
commit 1658622
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/sys/netipsec/key.c b/sys/netipsec/key.c
@@ -7164,7 +7164,7 @@ key_register(struct socket *so, struct mbuf *m, const struct sadb_msghdr *mhp)
 		return key_senderror(so, m, ENOBUFS);
 
 	MGETHDR(n, M_NOWAIT, MT_DATA);
-	if (len > MHLEN) {
+	if (n != NULL && len > MHLEN) {
 		if (!(MCLGET(n, M_NOWAIT))) {
 			m_freem(n);
 			n = NULL;