Patch "SUNRPC: Handle EADDRNOTAVAIL on connection failures" has been added to the 4.4-stable tree

Patch "SUNRPC: Handle EADDRNOTAVAIL on connection failures" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    SUNRPC: Handle EADDRNOTAVAIL on connection failures

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sunrpc-handle-eaddrnotavail-on-connection-failures.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1f4c17a03ba7f430d63dba8c8e08ff1e2712581d Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Mon, 1 Aug 2016 13:36:08 -0400
Subject: SUNRPC: Handle EADDRNOTAVAIL on connection failures

From: Trond Myklebust <trond.myklebust@primarydata.com>

commit 1f4c17a03ba7f430d63dba8c8e08ff1e2712581d upstream.

If the connect attempt immediately fails with an EADDRNOTAVAIL error, then
that means our choice of source port number was bad.
This error is expected when we set the SO_REUSEPORT socket option and we
have 2 sockets sharing the same source and destination address and port
combinations.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Fixes: 402e23b4ed9ed ("SUNRPC: Fix stupid typo in xs_sock_set_reuseport")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/sunrpc/xprtsock.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2286,6 +2286,10 @@ static int xs_tcp_finish_connecting(stru
 		/* SYN_SENT! */
 		if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
 			xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
+		break;
+	case -EADDRNOTAVAIL:
+		/* Source port number is unavailable. Try a new one! */
+		transport->srcport = 0;
 	}
 out:
 	return ret;


Patches currently in stable-queue which might be from trond.myklebust@primarydata.com are

queue-4.4/sunrpc-handle-eaddrnotavail-on-connection-failures.patch
queue-4.4/sunrpc-allow-for-upcalls-for-same-uid-but-different-gss-service.patch