The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From ec6017d9035986a36de064f48a63245930bfad6f Mon Sep 17 00:00:00 2001
From: Olga Kornievskaia kolga@netapp.com Date: Wed, 29 May 2019 10:46:00 -0400 Subject: [PATCH] SUNRPC fix regression in umount of a secure mount
If call_status returns ENOTCONN, we need to re-establish the connection state after. Otherwise the client goes into an infinite loop of call_encode, call_transmit, call_status (ENOTCONN), call_encode.
Fixes: c8485e4d63 ("SUNRPC: Handle ECONNREFUSED correctly in xprt_transmit()") Signed-off-by: Olga Kornievskaia kolga@netapp.com Cc: stable@vger.kernel.org # v2.6.29+ Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index d6e57da56c94..94a653be8e25 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -2288,13 +2288,13 @@ call_status(struct rpc_task *task) case -ECONNREFUSED: case -ECONNRESET: case -ECONNABORTED: + case -ENOTCONN: rpc_force_rebind(clnt); /* fall through */ case -EADDRINUSE: rpc_delay(task, 3*HZ); /* fall through */ case -EPIPE: - case -ENOTCONN: case -EAGAIN: break; case -EIO: