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From:   trondmy@kernel.org
To:     wanghai <wanghai38@huawei.com>, linux-nfs@vger.kernel.org
Subject: [PATCH 1/2] SUNRPC: Don't leak sockets in xs_local_connect()
Date:   Thu, 28 Apr 2022 11:30:00 -0400
Message-Id: <20220428153001.9545-1-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

If there is still a closed socket associated with the transport, then we
need to trigger an autoclose before we can set up a new connection.

Reported-by: wanghai (M) <wanghai38@huawei.com>
Fixes: f00432063db1 ("SUNRPC: Ensure we flush any closed sockets before xs_xprt_free()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 net/sunrpc/xprtsock.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 8ab64ea46870..f9849b297ea3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1950,6 +1950,9 @@ static void xs_local_connect(struct rpc_xprt *xprt, struct rpc_task *task)
 	struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
 	int ret;
 
+	if (transport->file)
+		goto force_disconnect;
+
 	if (RPC_IS_ASYNC(task)) {
 		/*
 		 * We want the AF_LOCAL connect to be resolved in the
@@ -1962,11 +1965,17 @@ static void xs_local_connect(struct rpc_xprt *xprt, struct rpc_task *task)
 		 */
 		task->tk_rpc_status = -ENOTCONN;
 		rpc_exit(task, -ENOTCONN);
-		return;
+		goto out_wake;
 	}
 	ret = xs_local_setup_socket(transport);
 	if (ret && !RPC_IS_SOFTCONN(task))
 		msleep_interruptible(15000);
+	return;
+force_disconnect:
+	xprt_force_disconnect(xprt);
+out_wake:
+	xprt_clear_connecting(xprt);
+	xprt_wake_pending_tasks(xprt, -ENOTCONN);
 }
 
 #if IS_ENABLED(CONFIG_SUNRPC_SWAP)
-- 
2.35.1