{"id":2224070,"url":"http://patchwork.ozlabs.org/api/patches/2224070/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260416180107.777065-12-kwilczynski@kernel.org/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/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/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<20260416180107.777065-12-kwilczynski@kernel.org>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260416180107.777065-12-kwilczynski@kernel.org/","date":"2026-04-16T18:00:55","name":"[v5,11/23] alpha/PCI: Add security_locked_down() check to pci_mmap_resource()","commit_ref":null,"pull_url":null,"state":"handled-elsewhere","archived":false,"hash":"85e255e201157199e03ea2f72ba06095bcdd518e","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260416180107.777065-12-kwilczynski@kernel.org/mbox/","series":[{"id":500194,"url":"http://patchwork.ozlabs.org/api/series/500194/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=500194","date":"2026-04-16T18:00:44","name":"PCI: Convert all dynamic sysfs attributes to static","version":5,"mbox":"http://patchwork.ozlabs.org/series/500194/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2224070/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2224070/checks/","tags":{},"related":[],"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=vRS/mQhV;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; helo=lists.ozlabs.org;\n envelope-from=linuxppc-dev+bounces-19802-incoming=patchwork.ozlabs.org@lists.ozlabs.org;\n receiver=patchwork.ozlabs.org)","lists.ozlabs.org;\n arc=none smtp.remote-ip=\"2600:3c0a:e001:78e:0:1991:8:25\"","lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org","lists.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=vRS/mQhV;\n\tdkim-atps=neutral","lists.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org\n (client-ip=2600:3c0a:e001:78e:0:1991:8:25; helo=sea.source.kernel.org;\n envelope-from=kwilczynski@kernel.org; receiver=lists.ozlabs.org)"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117])\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 legolas.ozlabs.org (Postfix) with ESMTPS id 4fxQpT4fwbz1yD3\n\tfor ; Fri, 17 Apr 2026 04:02:41 +1000 (AEST)","from boromir.ozlabs.org (localhost [127.0.0.1])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 4fxQnY1FdSz3bcb;\n\tFri, 17 Apr 2026 04:01:53 +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 4fxQnX3XdMz2xmX\n\tfor ; Fri, 17 Apr 2026 04:01:52 +1000 (AEST)","from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58])\n\tby sea.source.kernel.org (Postfix) with ESMTP id D59FF419C8;\n\tThu, 16 Apr 2026 18:01:50 +0000 (UTC)","by smtp.kernel.org (Postfix) with ESMTPSA id 8A12AC2BCAF;\n\tThu, 16 Apr 2026 18:01:47 +0000 (UTC)"],"ARC-Seal":"i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1776362513;\n\tcv=none;\n b=clUfTAdb4/ggFFDU88yqqZBUgsFNsQEQfdz8STF4mbhGdu+eh1SCjlM+4NzLPo5mGvTHYUjexBnhEQSQ+JVrQ2SvbXsI+arL+aDDczhfD0/D8qMiehdVxxX/3Tj0KzNu4XbimegHDXgMMQGD7JNXZxXqfvmYF/MZ7c1v5EnCGHYWhNEnSheCDZGpZJkIofuPXQsO7cPqs2g4eaaOwJNy2qL4VzD/cmcJG9mfxks0/j1XiSoaiaD+3rN3/h8S3F9tdUlfNq9OR3XjEjc0IsYFQuk4FXMuUP5IvxmsgnpBuurzmMwllFGy/hb1x0u0bfhAalLmnHcCOZo5EYQwrwHsmw==","ARC-Message-Signature":"i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1776362513; c=relaxed/relaxed;\n\tbh=dmKrlGku+qVgZfPpsLskaZgkhTvxKdm51xS6hJbhb70=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=dDCjcA8y9L3jJfG2Opp/SBlMM3vwNusosEbh3a+WHERPOOonriFAk1Cmur0a+l7HJpWgxqDpJYdNXUYekSFD96UnJaCeYMP+Ye9r3QpFqEeLWwReM/PRVxXeJcnXb+s0fKXjsLq2cnd6QJ0hA4iuve9hN6jN0lhwYas6o9mnnAPXw/g4DkacyTbC3FHeU/Z3mEg4Kw5PYGBNcLPVBgdpBlEdYc8t6cEttsLO9wQOl4Ltb4DXvus8KkbTJo0NOZe+hYKxEbXlyRoDga4v9ez9wlxBci5t56nCdGy2SN0OhJbw07BqDb6X/55E1SpNGeOyJZez0t4wW62Z+T8PqE1X1w==","ARC-Authentication-Results":"i=1; lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=kernel.org;\n dkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=vRS/mQhV; dkim-atps=neutral;\n spf=pass (client-ip=2600:3c0a:e001:78e:0:1991:8:25;\n helo=sea.source.kernel.org; envelope-from=kwilczynski@kernel.org;\n receiver=lists.ozlabs.org) smtp.mailfrom=kernel.org","DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1776362510;\n\tbh=ynGnSMSFqOAAKmLZRmEyMAZNgYryMwxIuUv1xLlXFbQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=vRS/mQhVt4v6pbbwRuRp+3xi/wnp2uYmhsRaYhN4EMQyiIPjz7f1U8eTl4xhkqjt8\n\t KlF2dtVGTSMrztvuWx0t2NhJD1N+THTMSRMwESPQTtgxODKTWrX9qkhuagqpgZRfoW\n\t mwXSliJWA6X0ArMLDMA5p0wCcCMaD9AAbOcf6VTtJeGoK+ZqgKVW3zsRzn0Y3Y4WzF\n\t DePodAHWOLMKDqCW/IiMI8SyvahzGh0dDt53HjVpwwPjTar4AGqmXLEXJBacNyvymd\n\t pppmWG9/19Earg7BHtBunVuN50FU/lXGZs2wXdyTbtWC6FFDhXoVWJu2QaXheZXKZZ\n\t 2YVPFFVbfCD/Q==","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 v5 11/23] alpha/PCI: Add security_locked_down() check to\n pci_mmap_resource()","Date":"Thu, 16 Apr 2026 18:00:55 +0000","Message-ID":"<20260416180107.777065-12-kwilczynski@kernel.org>","X-Mailer":"git-send-email 2.53.0","In-Reply-To":"<20260416180107.777065-1-kwilczynski@kernel.org>","References":"<20260416180107.777065-1-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\")\nTested-by: Magnus Lindholm \nReviewed-by: Ilpo Järvinen \nAcked-by: Magnus Lindholm \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":["v5","11/23"]}