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[209.132.180.67]) by mx.google.com with ESMTP id w13si14966661pgj.177.2019.04.03.17.34.43; Wed, 03 Apr 2019 17:34:58 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=Crz5pwAh; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727431AbfDDAdk (ORCPT + 99 others); Wed, 3 Apr 2019 20:33:40 -0400 Received: from mail-vk1-f202.google.com ([209.85.221.202]:48575 "EHLO mail-vk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727259AbfDDAdi (ORCPT ); Wed, 3 Apr 2019 20:33:38 -0400 Received: by mail-vk1-f202.google.com with SMTP id l85so431991vke.15 for ; Wed, 03 Apr 2019 17:33:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=4G8m95jwtwdfjA5z7EFk9aUl9ztD0RqYosPZp4xmjEc=; b=Crz5pwAhhGfJ0QYGLtrhjgTwc28guJi6H/Id0SKwWnJIKYGPPm2VUMcicPe48h/eOT UcmCpUt3C0UrJ4X77h+cvV41W2pqvyneD2rLGVq1W8zMb6190GtxQWQ3ncoa3Vx+D5HJ mgC7r5/geCa4OpN5ejJlsGjspfTd0+y6LC4AE7j9RvCqR2HKzcRq18fSSnEagdIIAEad 0yVCAn6iJ70IVGzVf7QUDOATfxcDtENqwBx1POTRzmWqsvLuikbJYNFT6+TJyiLOgo0Z DdQ1SjRYn09pSaYBc8g+Slk8tipFCdyY/lz7hBqGwUaED4rQA2H1saWZEAXRPPFV3INX N5uA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=4G8m95jwtwdfjA5z7EFk9aUl9ztD0RqYosPZp4xmjEc=; b=jl5Wx2xxFD3Q2x7MNZv19zKigaOH/9yNJdQ/Zj8ocwSZMNgx0BUN1Tt910hCdeSEkH XYfJH9J9g19lNroQH14tHb90LNeD7EPMqq2PRjgT3Uc6chHMroVpDVFqr/EGGFyIFuM2 Orxpu3Fygd+NhGrL91XxpPVhXN3iyA0qBiJ8++im7gC7XQvurtebtevts1qtRLXM1kUy VwaU5IbWS+tIwK1A3LcVUDQ8ZfljQKythWj4Y8031fFkk6UgUG8JcXJyfqpBciCzt551 YienpilJ6WROF7S+huQ5RWow5NDWbw4gCozLutQH3dQTH4ZOE8LDNb9ivqF6J0gXvHq1 Umfw== X-Gm-Message-State: APjAAAWbuMhDNc7GNyW7p7RGHQxPVZsI8+vQJHFkQE9v3rnOtxrDCd81 xjakxN6rlAqkIi7lEwGg1+SBMnM/mwXUZd6Cvn/6Cw== X-Received: by 2002:a1f:3c0a:: with SMTP id j10mr367978vka.17.1554338017457; Wed, 03 Apr 2019 17:33:37 -0700 (PDT) Date: Wed, 3 Apr 2019 17:32:38 -0700 In-Reply-To: <20190404003249.14356-1-matthewgarrett@google.com> Message-Id: <20190404003249.14356-17-matthewgarrett@google.com> Mime-Version: 1.0 References: <20190404003249.14356-1-matthewgarrett@google.com> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog Subject: [PATCH V32 16/27] Prohibit PCMCIA CIS storage when the kernel is locked down From: Matthew Garrett To: jmorris@namei.org Cc: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, dhowells@redhat.com, linux-api@vger.kernel.org, luto@kernel.org, Dominik Brodowski , Matthew Garrett Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Howells Prohibit replacement of the PCMCIA Card Information Structure when the kernel is locked down. Suggested-by: Dominik Brodowski Signed-off-by: David Howells Signed-off-by: Matthew Garrett --- drivers/pcmcia/cistpl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c index ac0672b8dfca..9e23300a55e5 100644 --- a/drivers/pcmcia/cistpl.c +++ b/drivers/pcmcia/cistpl.c @@ -1578,6 +1578,10 @@ static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj, struct pcmcia_socket *s; int error; + if (kernel_is_locked_down("Direct PCMCIA CIS storage", + LOCKDOWN_INTEGRITY)) + return -EPERM; + s = to_socket(container_of(kobj, struct device, kobj)); if (off) -- 2.21.0.392.gf8f6787159e-goog