From 1f3b359f1004bd34b7b0bad70b93e3c7af92a37b Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 8 Sep 2017 12:44:47 -0700 Subject: tcp: fix a request socket leak While the cited commit fixed a possible deadlock, it added a leak of the request socket, since reqsk_put() must be called if the BPF filter decided the ACK packet must be dropped. Fixes: d624d276d1dd ("tcp: fix possible deadlock in TCP stack vs BPF filter") Signed-off-by: Eric Dumazet Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- net/ipv6/tcp_ipv6.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'net/ipv6/tcp_ipv6.c') diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 38f76d8b231e..64d94afa427f 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1460,9 +1460,9 @@ process: } sock_hold(sk); refcounted = true; - if (tcp_filter(sk, skb)) - goto discard_and_relse; - nsk = tcp_check_req(sk, skb, req, false); + nsk = NULL; + if (!tcp_filter(sk, skb)) + nsk = tcp_check_req(sk, skb, req, false); if (!nsk) { reqsk_put(req); goto discard_and_relse; -- cgit v1.2.3