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GET /api/1.1/patches/2226607/?format=api
{ "id": 2226607, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2226607/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260422161407.118748-12-kwilczynski@kernel.org/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.1/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<20260422161407.118748-12-kwilczynski@kernel.org>", "date": "2026-04-22T16:13:54", "name": "[v6,11/24] alpha/PCI: Add security_locked_down() check to pci_mmap_resource()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "85e255e201157199e03ea2f72ba06095bcdd518e", "submitter": { "id": 86709, "url": "http://patchwork.ozlabs.org/api/1.1/people/86709/?format=api", "name": "Krzysztof Wilczyński", "email": "kwilczynski@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260422161407.118748-12-kwilczynski@kernel.org/mbox/", "series": [ { "id": 501041, "url": "http://patchwork.ozlabs.org/api/1.1/series/501041/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=501041", "date": "2026-04-22T16:13:46", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 6, "mbox": "http://patchwork.ozlabs.org/series/501041/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226607/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226607/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-52997-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=GhKrrLTT;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-pci+bounces-52997-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)", "smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=\"GhKrrLTT\"", "smtp.subspace.kernel.org;\n arc=none smtp.client-ip=10.30.226.201" ], "Received": [ "from tor.lore.kernel.org (tor.lore.kernel.org [172.105.105.114])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g14Hh5FsGz1yCv\n\tfor <incoming@patchwork.ozlabs.org>; Thu, 23 Apr 2026 02:22:08 +1000 (AEST)", "from smtp.subspace.kernel.org (conduit.subspace.kernel.org\n [100.90.174.1])\n\tby tor.lore.kernel.org (Postfix) with ESMTP id AF0B330886D0\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 16:14:50 +0000 (UTC)", "from localhost.localdomain (localhost.localdomain [127.0.0.1])\n\tby smtp.subspace.kernel.org (Postfix) with ESMTP id 776681A3164;\n\tWed, 22 Apr 2026 16:14:50 +0000 (UTC)", "from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org\n [10.30.226.201])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C54937700B;\n\tWed, 22 Apr 2026 16:14:50 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id 10EDAC2BCAF;\n\tWed, 22 Apr 2026 16:14:46 +0000 (UTC)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776874490; cv=none;\n b=QCGPOlqmGxr/6LSeHKv1xDpL/HD4fatpg9xOUxIYbZB3S43dG/Jdr3lZfpsAmZFeNcm47Ld1RdoGa88eusNErhhpHk19hYMSXNs6X1EAXntIjsrEXPSLKqowm31m1cawd/xmyejdjNuQ3x7twx9o4GcMpw21K3vvC6uWb/6D85A=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776874490; c=relaxed/simple;\n\tbh=G9J13TW73xutdYdnp+hqNnYui77KfP+Wzlkm8iI4IbM=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=qD7k/77PIeDkfUE+szn7s9YjdzsYOmXi32Ki7kIf0sVhDJ6MB3WnyS12coVN92e4TJiHzB+gpr6XUFVFJylsuIrJTA/7BqCe85M7k25pbSBCXq83KAQjZ9UPM74bcNyPEyKqCIAifcpV6+UcYJ/cNKluwWR9VdBCfNDF6p5jwug=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.b=GhKrrLTT; arc=none smtp.client-ip=10.30.226.201", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1776874490;\n\tbh=G9J13TW73xutdYdnp+hqNnYui77KfP+Wzlkm8iI4IbM=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=GhKrrLTTQzUJd8oryNF9cvyIUBhElsLD4y/1HGPKupzEibiJ5WObIQimuKDXqgUdE\n\t hiZE/Nmbt9b5ligXi1K0HzJlcrclXWh2v9xIYCvtR1Qc2G0hvky1RG06yjEN/Kd2VA\n\t uuQOV2f7fNJE9ysHJyOsYSejRC5SdRa6BNOew0+8iodDX52QTTSrtQZ7wYSfhU5gpU\n\t 7owy4FcH4+VGzkbBVsLMkLaCPnH1vvxf4fqzZaueYwS2FTYFJ85C3bJe/b3N+AYC0h\n\t aD9ImRlkz6ojbok6thc3YuoguRrChzW/5HrJX9wGEy+XGuJ+QHSjBhahQ9mzV3A2Em\n\t 5+S4vv/DvRv4g==", "From": "=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kwilczynski@kernel.org>", "To": "Bjorn Helgaas <bhelgaas@google.com>", "Cc": "Bjorn Helgaas <helgaas@kernel.org>,\n Manivannan Sadhasivam <mani@kernel.org>,\n Lorenzo Pieralisi <lpieralisi@kernel.org>,\n Magnus Lindholm <linmag7@gmail.com>, Matt Turner <mattst88@gmail.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n Christophe Leroy <chleroy@kernel.org>,\n Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>,\n Dexuan Cui <decui@microsoft.com>,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= <khalasa@piap.pl>,\n Lukas Wunner <lukas@wunner.de>, \"Oliver O'Halloran\" <oohall@gmail.com>,\n Saurabh Singh Sengar <ssengar@microsoft.com>,\n Shuan He <heshuan@bytedance.com>, Srivatsa Bhat <srivatsabhat@microsoft.com>,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH v6 11/24] alpha/PCI: Add security_locked_down() check to\n pci_mmap_resource()", "Date": "Wed, 22 Apr 2026 16:13:54 +0000", "Message-ID": "<20260422161407.118748-12-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.54.0", "In-Reply-To": "<20260422161407.118748-1-kwilczynski@kernel.org>", "References": "<20260422161407.118748-1-kwilczynski@kernel.org>", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "content": "Currently, Alpha's pci_mmap_resource() does not check\nsecurity_locked_down(LOCKDOWN_PCI_ACCESS) before allowing\nuserspace to mmap PCI BARs.\n\nThe generic version has had this check since commit eb627e17727e\n(\"PCI: Lock down BAR access when the kernel is locked down\") to\nprevent DMA attacks when the kernel is locked down.\n\nAdd the same check to Alpha's pci_mmap_resource().\n\nFixes: eb627e17727e (\"PCI: Lock down BAR access when the kernel is locked down\")\nTested-by: Magnus Lindholm <linmag7@gmail.com>\nReviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>\nAcked-by: Magnus Lindholm <linmag7@gmail.com>\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\n---\n arch/alpha/kernel/pci-sysfs.c | 7 ++++++-\n 1 file changed, 6 insertions(+), 1 deletion(-)", "diff": "diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 3048758304b5..2324720c3e83 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -11,6 +11,7 @@\n */\n \n #include <linux/sched.h>\n+#include <linux/security.h>\n #include <linux/stat.h>\n #include <linux/slab.h>\n #include <linux/pci.h>\n@@ -71,7 +72,11 @@ static int pci_mmap_resource(struct kobject *kobj,\n \tstruct resource *res = attr->private;\n \tenum pci_mmap_state mmap_type;\n \tstruct pci_bus_region bar;\n-\tint i;\n+\tint i, ret;\n+\n+\tret = security_locked_down(LOCKDOWN_PCI_ACCESS);\n+\tif (ret)\n+\t\treturn ret;\n \n \tfor (i = 0; i < PCI_STD_NUM_BARS; i++)\n \t\tif (res == &pdev->resource[i])\n", "prefixes": [ "v6", "11/24" ] }