From 37e14f4fe2991f6089a9c8a3830e3ab634ec7190 Mon Sep 17 00:00:00 2001 From: Sowmini Varadhan Date: Wed, 18 May 2016 10:06:23 -0700 Subject: [PATCH] RDS: TCP: rds_tcp_accept_worker() must exit gracefully when terminating rds-tcp There are two instances where we want to terminate RDS-TCP: when exiting the netns or during module unload. In either case, the termination sequence is to stop the listen socket, mark the rtn->rds_tcp_listen_sock as null, and flush any accept workqs. Thus any workqs that get flushed at this point will encounter a null rds_tcp_listen_sock, and must exit gracefully to allow the RDS-TCP termination to complete successfully. Signed-off-by: Sowmini Varadhan Acked-by: Santosh Shilimkar Signed-off-by: David S. Miller --- net/rds/tcp_listen.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c index 3fa367945105..094a8cae0ef1 100644 --- a/net/rds/tcp_listen.c +++ b/net/rds/tcp_listen.c @@ -80,6 +80,9 @@ int rds_tcp_accept_one(struct socket *sock) int conn_state; struct sock *nsk; + if (!sock) /* module unload or netns delete in progress */ + return -ENETUNREACH; + ret = sock_create_kern(sock_net(sock->sk), sock->sk->sk_family, sock->sk->sk_type, sock->sk->sk_protocol, &new_sock);