This is a note to let you know that I've just added the patch titled
USB: prevent buggy hubs from crashing the USB stack
to the 2.6.37-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-prevent-buggy-hubs-from-crashing-the-usb-stack.patch
and it can be found in the queue-2.6.37 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From d199c96d41d80a567493e12b8e96ea056a1350c1 Mon Sep 17 00:00:00 2001
From: Alan Stern <[email protected]>
Date: Mon, 31 Jan 2011 10:56:37 -0500
Subject: USB: prevent buggy hubs from crashing the USB stack
From: Alan Stern <[email protected]>
commit d199c96d41d80a567493e12b8e96ea056a1350c1 upstream.
If anyone comes across a high-speed hub that (by mistake or by design)
claims to have no Transaction Translators, plugging a full- or
low-speed device into it will cause the USB stack to crash. This
patch (as1446) prevents the problem by ignoring such devices, since
the kernel has no way to communicate with them.
Signed-off-by: Alan Stern <[email protected]>
Tested-by: Perry Neben <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/usb/core/hub.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2723,6 +2723,11 @@ hub_port_init (struct usb_hub *hub, stru
udev->ttport = hdev->ttport;
} else if (udev->speed != USB_SPEED_HIGH
&& hdev->speed == USB_SPEED_HIGH) {
+ if (!hub->tt.hub) {
+ dev_err(&udev->dev, "parent hub has no TT\n");
+ retval = -EINVAL;
+ goto fail;
+ }
udev->tt = &hub->tt;
udev->ttport = port1;
}
Patches currently in stable-queue which might be from [email protected]
are
queue-2.6.37/usb-prevent-buggy-hubs-from-crashing-the-usb-stack.patch
queue-2.6.37/usb-ehci-fix-scheduling-while-atomic-during-suspend.patch
queue-2.6.37/usb-usb-storage-unusual_devs-entry-for-coby-mp3-player.patch
queue-2.6.37/usb-fix-race-between-root-hub-resume-and-wakeup-requests.patch
queue-2.6.37/usb-g_printer-fix-bug-in-unregistration.patch
queue-2.6.37/usb-usb-storage-unusual_devs-entry-for-camsport-evo.patch
queue-2.6.37/usb-ehci-fix-dma-deallocation-bug.patch
queue-2.6.37/usb-g_printer-fix-bug-in-module-parameter-definitions.patch
queue-2.6.37/usb-serial-add-missing-.usb_driver-field-in-serial-drivers.patch
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