This is a note to let you know that I've just added the patch titled
rds: tcp: use sock_create_lite() to create the accept socket
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rds-tcp-use-sock_create_lite-to-create-the-accept-socket.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0933a578cd55b02dc80f219dc8f2efb17ec61c9a Mon Sep 17 00:00:00 2001
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
Date: Thu, 6 Jul 2017 08:15:06 -0700
Subject: rds: tcp: use sock_create_lite() to create the accept socket
From: Sowmini Varadhan <sowmini.varadhan@xxxxxxxxxx>
commit 0933a578cd55b02dc80f219dc8f2efb17ec61c9a upstream.
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@xxxxxxxxxx>
Acked-by: Santosh Shilimkar <santosh.shilimkar@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/rds/tcp_listen.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -129,7 +129,7 @@ int rds_tcp_accept_one(struct socket *so
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)
Patches currently in stable-queue which might be from sowmini.varadhan@xxxxxxxxxx are
queue-4.9/rds-tcp-use-sock_create_lite-to-create-the-accept-socket.patch