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rds: tcp: use sock_create_lite() to create the accept socket

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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@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>
This commit is contained in:
Sowmini Varadhan 2017-07-06 08:15:06 -07:00 committed by Greg Kroah-Hartman
parent e6577f1ef3
commit 181dda46a3
1 changed files with 1 additions and 1 deletions
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2
net/rds/tcp_listen.c
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@ -129,7 +129,7 @@ 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)