From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Thu, 6 Jul 2017 08:15:06 -0700
Subject: [PATCH] rds: tcp: use sock_create_lite() to create the accept socket
References: bnc#1060662
Patch-mainline: v4.12.3
Git-commit: 0933a578cd55b02dc80f219dc8f2efb17ec61c9a
[ Upstream commit 0933a578cd55b02dc80f219dc8f2efb17ec61c9a ]
There are two problems with calling sock_create_kern() from
rds_tcp_accept_one()
1. it sets up a new_sock->sk that is wasteful, because this ->sk
is going to get replaced by inet_accept() in the subsequent ->accept()
2. The new_sock->sk is a leaked reference in sock_graft() which
expects to find a null parent->sk
Avoid these problems by calling sock_create_lite().
Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
net/rds/tcp_listen.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index 507678853e6c..9a1798d6ae94 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -125,7 +125,7 @@ int rds_tcp_accept_one(struct socket *sock)
if (!sock) /* module unload or netns delete in progress */
return -ENETUNREACH;
- ret = sock_create_kern(sock_net(sock->sk), sock->sk->sk_family,
+ ret = sock_create_lite(sock->sk->sk_family,
sock->sk->sk_type, sock->sk->sk_protocol,
&new_sock);
if (ret)
--
2.14.2