Smack: Fix kbuild reported build error

The variable sap is defined under ifdef, but a recently
added use of the variable was not. Put that use under ifdef
as well.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index b5b333d72637..0de725f88bed 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3693,6 +3693,7 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
                         return -EINVAL;
                 rc = smack_netlabel_send(sock->sk, sip);
                 break;
+#if IS_ENABLED(CONFIG_IPV6)
         case AF_INET6:
                 if (msg->msg_namelen < SIN6_LEN_RFC2133 ||
                     sap->sin6_family != AF_INET6)
@@ -3706,6 +3707,7 @@ static int smack_socket_sendmsg(struct socket *sock, struct msghdr *msg,
 #ifdef SMACK_IPV6_PORT_LABELING
                 rc = smk_ipv6_port_check(sock->sk, sap, SMK_SENDING);
 #endif
+#endif /* IS_ENABLED(CONFIG_IPV6) */
                 break;
         }
         return rc;