Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933801AbdDEUS0 (ORCPT ); Wed, 5 Apr 2017 16:18:26 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49892 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934139AbdDEURz (ORCPT ); Wed, 5 Apr 2017 16:17:55 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com C23CE80F9A Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=dhowells@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com C23CE80F9A Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 22/24] Prohibit PCMCIA CIS storage when the kernel is locked down From: David Howells To: linux-kernel@vger.kernel.org Cc: gnomes@lxorguk.ukuu.org.uk, linux-efi@vger.kernel.org, matthew.garrett@nebula.com, gregkh@linuxfoundation.org, linux-pcmcia@lists.infradead.org, dhowells@redhat.com, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org Date: Wed, 05 Apr 2017 21:17:45 +0100 Message-ID: <149142346534.5101.3176119517193928628.stgit@warthog.procyon.org.uk> In-Reply-To: <149142326734.5101.4596394505987813763.stgit@warthog.procyon.org.uk> References: <149142326734.5101.4596394505987813763.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Wed, 05 Apr 2017 20:17:50 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 832 Lines: 27 Prohibit replacement of the PCMCIA Card Information Structure when the kernel is locked down. Suggested-by: Dominik Brodowski Signed-off-by: David Howells cc: linux-pcmcia@lists.infradead.org --- drivers/pcmcia/cistpl.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c index 55ef7d1fd8da..193e4f7b73b1 100644 --- a/drivers/pcmcia/cistpl.c +++ b/drivers/pcmcia/cistpl.c @@ -1578,6 +1578,11 @@ static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj, struct pcmcia_socket *s; int error; + if (kernel_is_locked_down()) { + pr_err("Direct CIS storage isn't permitted when the kernel is locked down\n"); + return -EPERM; + } + s = to_socket(container_of(kobj, struct device, kobj)); if (off)