Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751515AbaK1W32 (ORCPT ); Fri, 28 Nov 2014 17:29:28 -0500 Received: from mail.ispras.ru ([83.149.199.45]:58035 "EHLO mail.ispras.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751176AbaK1W31 (ORCPT ); Fri, 28 Nov 2014 17:29:27 -0500 From: Alexey Khoroshilov To: Valentina Manea , Shuah Khan Cc: Alexey Khoroshilov , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org Subject: [PATCH] usbip: fix error handling in stub_probe() Date: Sat, 29 Nov 2014 01:29:10 +0300 Message-Id: <1417213750-8856-1-git-send-email-khoroshilov@ispras.ru> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If usb_hub_claim_port() fails, no resources are deallocated and if stub_add_files() fails, port is not released. The patch fixes these issues and rearranges error handling code. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov --- drivers/usb/usbip/stub_dev.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c index fac20e0434c0..a3ec49bdc1e6 100644 --- a/drivers/usb/usbip/stub_dev.c +++ b/drivers/usb/usbip/stub_dev.c @@ -311,7 +311,6 @@ static int stub_probe(struct usb_device *udev) { struct stub_device *sdev = NULL; const char *udev_busid = dev_name(&udev->dev); - int err = 0; struct bus_id_priv *busid_priv; int rc; @@ -372,23 +371,28 @@ static int stub_probe(struct usb_device *udev) (struct usb_dev_state *) udev); if (rc) { dev_dbg(&udev->dev, "unable to claim port\n"); - return rc; + goto err_port; } - err = stub_add_files(&udev->dev); - if (err) { + rc = stub_add_files(&udev->dev); + if (rc) { dev_err(&udev->dev, "stub_add_files for %s\n", udev_busid); - dev_set_drvdata(&udev->dev, NULL); - usb_put_dev(udev); - kthread_stop_put(sdev->ud.eh); - - busid_priv->sdev = NULL; - stub_device_free(sdev); - return err; + goto err_files; } busid_priv->status = STUB_BUSID_ALLOC; return 0; +err_files: + usb_hub_release_port(udev->parent, udev->portnum, + (struct usb_dev_state *) udev); +err_port: + dev_set_drvdata(&udev->dev, NULL); + usb_put_dev(udev); + kthread_stop_put(sdev->ud.eh); + + busid_priv->sdev = NULL; + stub_device_free(sdev); + return rc; } static void shutdown_busid(struct bus_id_priv *busid_priv) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/