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authorBalazs Scheidler <bazsi@balabit.hu>2008-12-07 23:53:46 -0800
committerDavid S. Miller <davem@davemloft.net>2008-12-07 23:53:46 -0800
commitc49b9f295e513753e6d9bb4444ba502f1aa59b29 (patch)
treece46987a31304cf239bd8ee46afbc059cefab5dc
parent0a0755c9fe47dc9f8271935909c66096e43efbfe (diff)
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 <bazsi@balabit.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netfilter/xt_socket.c2
1 files changed, 1 insertions, 1 deletions
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)