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=ham 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 249CCC3A5A8 for ; Wed, 4 Sep 2019 18:07:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F176B208E4 for ; Wed, 4 Sep 2019 18:07:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620435; bh=YhZYuhnmS9tdig3xXuI3dsas3LT8WuW+r+Q0IcMXP2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xd7/G2bRPglQGoLjK1cHUBx+6dRhxt1N7zilGjg079YSqpXgX7Po2mHPSzgqSrAwI 6qhfNKtmX6sWTWR5Y819BxrPCm8jPbeS7VxbR7VYj3qW29pU/7CKrXHe/lbUTPAyKb NukGyQd/taktOSuNxa0jzmLwSqfzmunCH1eTF3/s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389029AbfIDSHN (ORCPT ); Wed, 4 Sep 2019 14:07:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:49524 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389583AbfIDSHL (ORCPT ); Wed, 4 Sep 2019 14:07:11 -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 B1BF72339E; Wed, 4 Sep 2019 18:07:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567620430; bh=YhZYuhnmS9tdig3xXuI3dsas3LT8WuW+r+Q0IcMXP2k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OvNkWZZTkOIfr8mC8brCEg4jKbSoSSuKtHJCQ6vV3e7QAcHHlx5RUxRRJqP0yFAcN 0kkyW37c2t6w1zQlitEEMDlveHPv/PFUltc6KOC2CB+HXYkeOi1B+ly5fSKSa8kBtG /BLHVFDYT/jHVeSK2cR//5msxR9bcqBm8rMJs8wE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Carsten Schmid , Mathias Nyman Subject: [PATCH 4.19 56/93] usb: hcd: use managed device resources Date: Wed, 4 Sep 2019 19:53:58 +0200 Message-Id: <20190904175307.950136275@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190904175302.845828956@linuxfoundation.org> References: <20190904175302.845828956@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: Schmid, Carsten commit 76da906ad727048a74bb8067031ee99fc070c7da upstream. Using managed device resources in usb_hcd_pci_probe() allows devm usage for resource subranges, such as the mmio resource for the platform device created to control host/device mode mux, which is a xhci extended capability, and sits inside the xhci mmio region. If managed device resources are not used then "parent" resource is released before subrange at driver removal as .remove callback is called before the devres list of resources for this device is walked and released. This has been observed with the xhci extended capability driver causing a use-after-free which is now fixed. An additional nice benefit is that error handling on driver initialisation is simplified much. Signed-off-by: Carsten Schmid Tested-by: Carsten Schmid Reviewed-by: Mathias Nyman Fixes: fa31b3cb2ae1 ("xhci: Add Intel extended cap / otg phy mux handling") Cc: # v4.19+ Link: https://lore.kernel.org/r/1566569488679.31808@mentor.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd-pci.c | 30 ++++++++---------------------- 1 file changed, 8 insertions(+), 22 deletions(-) --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -216,17 +216,18 @@ int usb_hcd_pci_probe(struct pci_dev *de /* EHCI, OHCI */ hcd->rsrc_start = pci_resource_start(dev, 0); hcd->rsrc_len = pci_resource_len(dev, 0); - if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, - driver->description)) { + if (!devm_request_mem_region(&dev->dev, hcd->rsrc_start, + hcd->rsrc_len, driver->description)) { dev_dbg(&dev->dev, "controller already in use\n"); retval = -EBUSY; goto put_hcd; } - hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len); + hcd->regs = devm_ioremap_nocache(&dev->dev, hcd->rsrc_start, + hcd->rsrc_len); if (hcd->regs == NULL) { dev_dbg(&dev->dev, "error mapping memory\n"); retval = -EFAULT; - goto release_mem_region; + goto put_hcd; } } else { @@ -240,8 +241,8 @@ int usb_hcd_pci_probe(struct pci_dev *de hcd->rsrc_start = pci_resource_start(dev, region); hcd->rsrc_len = pci_resource_len(dev, region); - if (request_region(hcd->rsrc_start, hcd->rsrc_len, - driver->description)) + if (devm_request_region(&dev->dev, hcd->rsrc_start, + hcd->rsrc_len, driver->description)) break; } if (region == PCI_ROM_RESOURCE) { @@ -275,20 +276,13 @@ int usb_hcd_pci_probe(struct pci_dev *de } if (retval != 0) - goto unmap_registers; + goto put_hcd; device_wakeup_enable(hcd->self.controller); if (pci_dev_run_wake(dev)) pm_runtime_put_noidle(&dev->dev); return retval; -unmap_registers: - if (driver->flags & HCD_MEMORY) { - iounmap(hcd->regs); -release_mem_region: - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); - } else - release_region(hcd->rsrc_start, hcd->rsrc_len); put_hcd: usb_put_hcd(hcd); disable_pci: @@ -347,14 +341,6 @@ void usb_hcd_pci_remove(struct pci_dev * dev_set_drvdata(&dev->dev, NULL); up_read(&companions_rwsem); } - - if (hcd->driver->flags & HCD_MEMORY) { - iounmap(hcd->regs); - release_mem_region(hcd->rsrc_start, hcd->rsrc_len); - } else { - release_region(hcd->rsrc_start, hcd->rsrc_len); - } - usb_put_hcd(hcd); pci_disable_device(dev); }