Patch "usb: fix cleanup after failure in hub_configure()" has been added to the 3.11-stable tree

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

    usb: fix cleanup after failure in hub_configure()

to the 3.11-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:
     usb-fix-cleanup-after-failure-in-hub_configure.patch
and it can be found in the queue-3.11 subdirectory.

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


>From d0308d4b6b02597f39fc31a9bddf7bb3faad5622 Mon Sep 17 00:00:00 2001
From: Krzysztof Mazur <krzysiek@xxxxxxxxxxxx>
Date: Thu, 22 Aug 2013 14:49:38 +0200
Subject: usb: fix cleanup after failure in hub_configure()

From: Krzysztof Mazur <krzysiek@xxxxxxxxxxxx>

commit d0308d4b6b02597f39fc31a9bddf7bb3faad5622 upstream.

If the hub_configure() fails after setting the hdev->maxchild
the hub->ports might be NULL or point to uninitialized kzallocated
memory causing NULL pointer dereference in hub_quiesce() during cleanup.

Now after such error the hdev->maxchild is set to 0 to avoid cleanup
of uninitialized ports.

Signed-off-by: Krzysztof Mazur <krzysiek@xxxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/usb/core/hub.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1568,6 +1568,7 @@ static int hub_configure(struct usb_hub
 	return 0;
 
 fail:
+	hdev->maxchild = 0;
 	dev_err (hub_dev, "config failed, %s (err %d)\n",
 			message, ret);
 	/* hub_disconnect() frees urb and descriptor */


Patches currently in stable-queue which might be from krzysiek@xxxxxxxxxxxx are

queue-3.11/usb-fail-on-usb_hub_create_port_device-errors.patch
queue-3.11/usb-fix-cleanup-after-failure-in-hub_configure.patch
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