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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