3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Shuah Khan <[email protected]> commit 4bfb141bc01312a817d36627cc47c93f801c216d upstream. usbip_host calls device_attach() without holding dev->parent lock. Fix it. Signed-off-by: Shuah Khan <[email protected]> Cc: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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;
