[INET]: Fix incorrect "inet_sock->is_icsk" assignment.

The inet_create() and inet6_create() functions incorrectly set the
inet_sock->is_icsk field.  Both functions assume that the is_icsk field is
large enough to hold at least a INET_PROTOSW_ICSK value when it is actually
only a single bit.  This patch corrects the assignment by doing a boolean
comparison whose result will safely fit into a single bit field.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/af_inet.c

@@ -305,7 +305,7 @@ lookup_protocol:
 		sk->sk_reuse = 1;
 
 	inet = inet_sk(sk);
-	inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
+	inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) == INET_PROTOSW_ICSK;
 
 	if (SOCK_RAW == sock->type) {
 		inet->num = protocol;

net/ipv6/af_inet6.c

@@ -171,7 +171,7 @@ lookup_protocol:
 		sk->sk_reuse = 1;
 
 	inet = inet_sk(sk);
-	inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
+	inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) == INET_PROTOSW_ICSK;
 
 	if (SOCK_RAW == sock->type) {
 		inet->num = protocol;