tcp: two more missing bh disable

percpu_counter only have protection against preemption.

TCP stack uses them possibly from BH, so we need BH protection
in contexts that could be run in process context

Fixes: c10d9310 ("tcp: do not assume TCP code is non preemptible")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/inet_connection_sock.c

@@ -706,7 +706,9 @@ void inet_csk_destroy_sock(struct sock *sk)
 
 	sk_refcnt_debug_release(sk);
 
+	local_bh_disable();
 	percpu_counter_dec(sk->sk_prot->orphan_count);
+	local_bh_enable();
 	sock_put(sk);
 }
 EXPORT_SYMBOL(inet_csk_destroy_sock);

net/ipv4/tcp_ipv4.c

@@ -1839,7 +1839,9 @@ void tcp_v4_destroy_sock(struct sock *sk)
 	tcp_free_fastopen_req(tp);
 	tcp_saved_syn_free(tp);
 
+	local_bh_disable();
 	sk_sockets_allocated_dec(sk);
+	local_bh_enable();
 
 	if (mem_cgroup_sockets_enabled && sk->sk_memcg)
 		sock_release_memcg(sk);