From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.kernel.org ([198.145.29.99]:32908 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755290AbeD3T0z (ORCPT ); Mon, 30 Apr 2018 15:26:55 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shuah Khan Subject: [PATCH 4.14 10/91] usbip: usbip_host: fix to hold parent lock for device_attach() calls Date: Mon, 30 Apr 2018 12:23:52 -0700 Message-Id: <20180430184004.766740270@linuxfoundation.org> In-Reply-To: <20180430184004.216234025@linuxfoundation.org> References: <20180430184004.216234025@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shuah Khan commit 4bfb141bc01312a817d36627cc47c93f801c216d upstream. usbip_host calls device_attach() without holding dev->parent lock. Fix it. Signed-off-by: Shuah Khan Cc: stable Signed-off-by: Greg Kroah-Hartman --- 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 @@ -200,7 +200,12 @@ 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;