{"id":2222352,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2222352/?format=json","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=json","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=json","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=json","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 ","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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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?= ","To":"Bjorn Helgaas ","Cc":"Bjorn Helgaas ,\n Manivannan Sadhasivam ,\n Lorenzo Pieralisi ,\n Magnus Lindholm , Matt Turner ,\n Richard Henderson ,\n Christophe Leroy ,\n Madhavan Srinivasan ,\n Michael Ellerman , Nicholas Piggin ,\n Dexuan Cui ,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= ,\n Lukas Wunner , \"Oliver O'Halloran\" ,\n Saurabh Singh Sengar ,\n Shuan He , Srivatsa Bhat ,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= ,\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":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","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 \nSigned-off-by: Krzysztof Wilczyński \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 \n+#include \n #include \n #include \n #include \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"]}