diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index e51253e5c161..5de4a2f886eb 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -1039,15 +1039,15 @@ static int iso_sock_rebind_bis(struct sock *sk, struct sockaddr_iso *sa,
 		goto done;
 	}
 
-	iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
-
-	for (int i = 0; i < iso_pi(sk)->bc_num_bis; i++)
+	for (int i = 0; i < sa->iso_bc->bc_num_bis; i++)
 		if (sa->iso_bc->bc_bis[i] < 0x01 ||
 		    sa->iso_bc->bc_bis[i] > 0x1f) {
 			err = -EINVAL;
 			goto done;
 		}
 
+	iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
+
 	memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
 	       iso_pi(sk)->bc_num_bis);