From c49b9f295e513753e6d9bb4444ba502f1aa59b29 Mon Sep 17 00:00:00 2001 From: Balazs Scheidler Date: Sun, 7 Dec 2008 23:53:46 -0800 Subject: [PATCH] tproxy: fixe a possible read from an invalid location in the socket match TIME_WAIT sockets need to be handled specially, and the socket match casted inet_timewait_sock instances to inet_sock, which are not compatible. Handle this special case by checking sk->sk_state. Signed-off-by: Balazs Scheidler Signed-off-by: David S. Miller --- net/netfilter/xt_socket.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netfilter/xt_socket.c b/net/netfilter/xt_socket.c index 02a8fed2108..1acc089be7e 100644 --- a/net/netfilter/xt_socket.c +++ b/net/netfilter/xt_socket.c @@ -141,7 +141,7 @@ socket_mt(const struct sk_buff *skb, const struct xt_match_param *par) sk = nf_tproxy_get_sock_v4(dev_net(skb->dev), protocol, saddr, daddr, sport, dport, par->in, false); if (sk != NULL) { - bool wildcard = (inet_sk(sk)->rcv_saddr == 0); + bool wildcard = (sk->sk_state != TCP_TIME_WAIT && inet_sk(sk)->rcv_saddr == 0); nf_tproxy_put_sock(sk); if (wildcard) -- 2.41.0