Subject: FAILED: patch "[PATCH] SUNRPC fix regression in umount of a secure mount" failed to apply to 4.9-stable tree
To:     kolga@netapp.com, Anna.Schumaker@Netapp.com
Cc:     <stable@vger.kernel.org>
From:   <gregkh@linuxfoundation.org>
Date:   Sun, 09 Jun 2019 11:44:39 +0200
Message-ID: <1560073479242@kroah.com>
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The patch below does not apply to the 4.9-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: