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GET /api/1.1/patches/2222352/?format=api
{ "id": 2222352, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2222352/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260411080148.471335-12-kwilczynski@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.1/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/" }, "msgid": "<20260411080148.471335-12-kwilczynski@kernel.org>", "date": "2026-04-11T08:01:35", "name": "[v4,11/24] 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/linuxppc-dev/patch/20260411080148.471335-12-kwilczynski@kernel.org/mbox/", "series": [ { "id": 499538, "url": "http://patchwork.ozlabs.org/api/1.1/series/499538/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499538", "date": "2026-04-11T08:01:24", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/499538/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222352/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222352/checks/", "tags": {}, "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19631-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.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=K7dA5Uu+;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Sat, 11 Apr 2026 18:03:25 +1000 (AEST)", "from boromir.ozlabs.org (localhost [127.0.0.1])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 4ft5kL36ZXz30V0;\n\tSat, 11 Apr 2026 18:02:34 +1000 (AEST)", "from sea.source.kernel.org (sea.source.kernel.org\n [IPv6:2600:3c0a:e001:78e:0:1991:8:25])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519)\n\t(No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 4ft5kK5Ypsz2ypV\n\tfor <linuxppc-dev@lists.ozlabs.org>; Sat, 11 Apr 2026 18:02:33 +1000 (AEST)", "from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n\tby sea.source.kernel.org (Postfix) with ESMTP id 034C54189C;\n\tSat, 11 Apr 2026 08:02:32 +0000 (UTC)", "by smtp.kernel.org (Postfix) with ESMTPSA id C8495C4CEF7;\n\tSat, 11 Apr 2026 08:02:28 +0000 (UTC)" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775894554;\n\tcv=none;\n b=NQ3hr/1FNNgeHbskVFiNga5ponyOd2CQaHcfbo7LO2XXbygmdmH7ErIZ2E8SdftAR1NFGX82f9ShTO5IEJ9JHoT9Ygd6o5GAZlZpEjDlUO02kpTt6tLCb9l8tGXm1E9piD7XxsTCQUdLKBXLPke2RgrS/M/1/XolkpdQ400JA2M6yIIBV5skUZVv66mD9x7hqPJ0yCE5/B+jLBv7N/AbSFt25xojsiOO0IY7cZantfgqpevX+jOlkU0CiLFuAJUSW0Al7yFfFz22UEEO7oH1Vptntr/lGG2eDuVGYrAahgYviq7ouegUnkLD7VIFxSJ6GLDpjabGRKY/ZvppVEJkRw==", "ARC-Message-Signature": "i=1; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775894551;\n\tbh=hnKN8ZM0yGcrm2yNmaVqMKt5Sul3nxMsmvK0n61ign4=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=K7dA5Uu+kcIZ1LR3asshfBY0oE0RRywbGafj10BdAHCu3m7lmUm20cgZkVbN7m5CR\n\t 77UVnfczgyUo3XiAirellX7MXnjNIdx8TWFqhroxl9NVChwlSLNnhuTez3nYEEJIln\n\t sJoXUK6QouEY7wc8jKRJ+GJBQgfVI/McQLbGSusMruJ7ridohWDZrNJLN3Nxh38g+E\n\t fc3vrGAPWuArKL+ML3Q/AgCofeQGCtGrctUaRY1uXUAPMAGAkt4A0v62BH6Ey+3HOH\n\t 26cuelHVDqXOZn24E0uD8kWVn30VkwPNxc6IdE8Bou5ncsHK1n5kSnIiTfPWdQ8MZW\n\t VAf16PnabcDuA==", "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 v4 11/24] alpha/PCI: Add security_locked_down() check to\n pci_mmap_resource()", "Date": "Sat, 11 Apr 2026 08:01:35 +0000", "Message-ID": "<20260411080148.471335-12-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260411080148.471335-1-kwilczynski@kernel.org>", "References": "<20260411080148.471335-1-kwilczynski@kernel.org>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "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\")\nReviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.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": [ "v4", "11/24" ] }