From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF0F5C18E5A for ; Tue, 10 Mar 2020 13:36:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B9E8E2468D for ; Tue, 10 Mar 2020 13:36:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583847381; bh=xTqSnR399JVMFNmpt5zBo18NEw/dj/k7g0k+HzivNv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IbambTe6sfw9HltuR9tul7qAmv1Kvi2JCIOBRo9jOlS42sCHJNr+tq5tMfKnXbA8M gWgfBGes+C8W24JKyITQdTj7X84U1Y/M5GpVGDqFhEB1CzNHbIpiA55RKp4rpU16v1 VzT5hqRNyHerAYYlohMT8dpMc2ofIxxIMn9O8ttU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727498AbgCJMnF (ORCPT ); Tue, 10 Mar 2020 08:43:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:43246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727473AbgCJMnB (ORCPT ); Tue, 10 Mar 2020 08:43:01 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5836A24686; Tue, 10 Mar 2020 12:43:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583844180; bh=xTqSnR399JVMFNmpt5zBo18NEw/dj/k7g0k+HzivNv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o5+cY8S0bMLHfMRjl1uBIo6hLg7uVFmr1/ZYZzP3LSZaykqFHYSITg7mQQ0qXTKeX WoaKLT0GKyxN9KJjfCurDh3uOCtlR/RGbue2zPUaSGh0/K30y3UcJZasS0jrx97Qb+ 1EZ4Wzskwuh+cUD6JRuRnHVMzKXPh91Q1CF4y5zA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alan Stern , Eugeniu Rosca Subject: [PATCH 4.4 53/72] usb: core: hub: do error out if usb_autopm_get_interface() fails Date: Tue, 10 Mar 2020 13:39:06 +0100 Message-Id: <20200310123614.358200850@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200310123601.053680753@linuxfoundation.org> References: <20200310123601.053680753@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eugeniu Rosca commit 60e3f6e4ac5b0fda43dad01c32e09409ec710045 upstream. Reviewing a fresh portion of coverity defects in USB core (specifically CID 1458999), Alan Stern noted below in [1]: On Tue, Feb 25, 2020 at 02:39:23PM -0500, Alan Stern wrote: > A revised search finds line 997 in drivers/usb/core/hub.c and lines > 216, 269 in drivers/usb/core/port.c. (I didn't try looking in any > other directories.) AFAICT all three of these should check the > return value, although a error message in the kernel log probably > isn't needed. Factor out the usb_remove_device() change into a standalone patch to allow conflict-free integration on top of the earliest stable branches. [1] https://lore.kernel.org/lkml/Pine.LNX.4.44L0.2002251419120.1485-100000@iolanthe.rowland.org Fixes: 253e05724f9230 ("USB: add a "remove hardware" sysfs attribute") Cc: stable@vger.kernel.org # v2.6.33+ Suggested-by: Alan Stern Signed-off-by: Eugeniu Rosca Acked-by: Alan Stern Link: https://lore.kernel.org/r/20200226175036.14946-2-erosca@de.adit-jv.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -938,13 +938,17 @@ int usb_remove_device(struct usb_device { struct usb_hub *hub; struct usb_interface *intf; + int ret; if (!udev->parent) /* Can't remove a root hub */ return -EINVAL; hub = usb_hub_to_struct_hub(udev->parent); intf = to_usb_interface(hub->intfdev); - usb_autopm_get_interface(intf); + ret = usb_autopm_get_interface(intf); + if (ret < 0) + return ret; + set_bit(udev->portnum, hub->removed_bits); hub_port_logical_disconnect(hub, udev->portnum); usb_autopm_put_interface(intf);