Patch "tty: vt, return error when con_startup fails" has been added to the 4.4-stable tree

Patch "tty: vt, return error when con_startup fails" 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

    tty: vt, return error when con_startup fails

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:
     tty-vt-return-error-when-con_startup-fails.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 6798df4c5fe0a7e6d2065cf79649a794e5ba7114 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@suse.cz>
Date: Tue, 3 May 2016 17:05:54 +0200
Subject: tty: vt, return error when con_startup fails

From: Jiri Slaby <jslaby@suse.cz>

commit 6798df4c5fe0a7e6d2065cf79649a794e5ba7114 upstream.

When csw->con_startup() fails in do_register_con_driver, we return no
error (i.e. 0). This was changed back in 2006 by commit 3e795de763.
Before that we used to return -ENODEV.

So fix the return value to be -ENODEV in that case again.

Fixes: 3e795de763 ("VT binding: Add binding/unbinding support for the VT console")
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Reported-by: "Dan Carpenter" <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/vt.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3583,9 +3583,10 @@ static int do_register_con_driver(const
 		goto err;
 
 	desc = csw->con_startup();
-
-	if (!desc)
+	if (!desc) {
+		retval = -ENODEV;
 		goto err;
+	}
 
 	retval = -EINVAL;
 


Patches currently in stable-queue which might be from jslaby@suse.cz are

queue-4.4/bluetooth-vhci-purge-unhandled-skbs.patch
queue-4.4/tty-n_gsm-fix-false-positive-warn_on.patch
queue-4.4/bluetooth-vhci-fix-open_timeout-vs.-hdev-race.patch
queue-4.4/tty-vt-return-error-when-con_startup-fails.patch