Patch "usb: fail on usb_hub_create_port_device() errors" 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: fail on usb_hub_create_port_device() errors

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-fail-on-usb_hub_create_port_device-errors.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 e58547eb9561a8a72d46e2d411090a614d33ac0e Mon Sep 17 00:00:00 2001
From: Krzysztof Mazur <krzysiek@xxxxxxxxxxxx>
Date: Thu, 22 Aug 2013 14:49:39 +0200
Subject: usb: fail on usb_hub_create_port_device() errors

From: Krzysztof Mazur <krzysiek@xxxxxxxxxxxx>

commit e58547eb9561a8a72d46e2d411090a614d33ac0e upstream.

Ignoring usb_hub_create_port_device() errors cause later NULL pointer
deference when uninitialized hub->ports[i] entries are dereferenced
after port memory allocation error.

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 |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1557,10 +1557,15 @@ static int hub_configure(struct usb_hub
 	if (hub->has_indicators && blinkenlights)
 		hub->indicator [0] = INDICATOR_CYCLE;
 
-	for (i = 0; i < hdev->maxchild; i++)
-		if (usb_hub_create_port_device(hub, i + 1) < 0)
+	for (i = 0; i < hdev->maxchild; i++) {
+		ret = usb_hub_create_port_device(hub, i + 1);
+		if (ret < 0) {
 			dev_err(hub->intfdev,
 				"couldn't create port%d device.\n", i + 1);
+			hdev->maxchild = i;
+			goto fail_keep_maxchild;
+		}
+	}
 
 	usb_hub_adjust_deviceremovable(hdev, hub->descriptor);
 
@@ -1569,6 +1574,7 @@ static int hub_configure(struct usb_hub
 
 fail:
 	hdev->maxchild = 0;
+fail_keep_maxchild:
 	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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