From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1162231AbdEWVDV (ORCPT ); Tue, 23 May 2017 17:03:21 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:56994 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161690AbdEWVDR (ORCPT ); Tue, 23 May 2017 17:03:17 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Woodhouse , Bjorn Helgaas Subject: [PATCH 3.18 56/59] PCI: Fix pci_mmap_fits() for HAVE_PCI_RESOURCE_TO_USER platforms Date: Tue, 23 May 2017 22:10:24 +0200 Message-Id: <20170523200854.085176613@linuxfoundation.org> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170523200849.241966497@linuxfoundation.org> References: <20170523200849.241966497@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: David Woodhouse commit 6bccc7f426abd640f08d8c75fb22f99483f201b4 upstream. In the PCI_MMAP_PROCFS case when the address being passed by the user is a 'user visible' resource address based on the bus window, and not the actual contents of the resource, that's what we need to be checking it against. Signed-off-by: David Woodhouse Signed-off-by: Bjorn Helgaas Signed-off-by: Greg Kroah-Hartman --- drivers/pci/pci-sysfs.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -964,15 +964,19 @@ void pci_remove_legacy_files(struct pci_ int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vma, enum pci_mmap_api mmap_api) { - unsigned long nr, start, size, pci_start; + unsigned long nr, start, size; + resource_size_t pci_start = 0, pci_end; if (pci_resource_len(pdev, resno) == 0) return 0; nr = vma_pages(vma); start = vma->vm_pgoff; size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1; - pci_start = (mmap_api == PCI_MMAP_PROCFS) ? - pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0; + if (mmap_api == PCI_MMAP_PROCFS) { + pci_resource_to_user(pdev, resno, &pdev->resource[resno], + &pci_start, &pci_end); + pci_start >>= PAGE_SHIFT; + } if (start >= pci_start && start < pci_start + size && start + nr <= pci_start + size) return 1;