4.4-stable review patch. If anyone has any objections, please let me know.
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From: Shuah Khan shuahkh@osg.samsung.com
commit 4bfb141bc01312a817d36627cc47c93f801c216d upstream.
usbip_host calls device_attach() without holding dev->parent lock. Fix it.
Signed-off-by: Shuah Khan shuahkh@osg.samsung.com Cc: stable stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/usbip/stub_main.c | 5 +++++ 1 file changed, 5 insertions(+)
--- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -201,7 +201,12 @@ static ssize_t rebind_store(struct devic if (!bid) return -ENODEV;
+ /* device_attach() callers should hold parent lock for USB */ + if (bid->udev->dev.parent) + device_lock(bid->udev->dev.parent); ret = device_attach(&bid->udev->dev); + if (bid->udev->dev.parent) + device_unlock(bid->udev->dev.parent); if (ret < 0) { dev_err(&bid->udev->dev, "rebind failed\n"); return ret;