Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934086AbcLAMdV (ORCPT ); Thu, 1 Dec 2016 07:33:21 -0500 Received: from mx1.redhat.com ([209.132.183.28]:43406 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932600AbcLAMdS (ORCPT ); Thu, 1 Dec 2016 07:33:18 -0500 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 27/39] Annotate hardware config module parameters in drivers/scsi/ From: David Howells To: linux-kernel@vger.kernel.org Cc: Michael Schmitz , Achim Leubner , "James E.J. Bottomley" , linux-scsi@vger.kernel.org, "Martin K. Petersen" , gnomes@lxorguk.ukuu.org.uk, Finn Thain , dhowells@redhat.com, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org, minyard@acm.org, "Juergen E. Fischer" , Dario Ballabio Date: Thu, 01 Dec 2016 12:33:13 +0000 Message-ID: <148059559339.31612.16180464424786438715.stgit@warthog.procyon.org.uk> In-Reply-To: <148059537897.31612.9461043954611464597.stgit@warthog.procyon.org.uk> References: <148059537897.31612.9461043954611464597.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 [10.5.110.25]); Thu, 01 Dec 2016 12:33:17 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5160 Lines: 127 When the kernel is running in secure boot mode, we lock down the kernel to prevent userspace from modifying the running kernel image. Whilst this includes prohibiting access to things like /dev/mem, it must also prevent access by means of configuring driver modules in such a way as to cause a device to access or modify the kernel image. To this end, annotate module_param* statements that refer to hardware configuration and indicate for future reference what type of parameter they specify. The parameter parser in the core sees this information and can skip such parameters with an error message if the kernel is locked down. The module initialisation then runs as normal, but just sees whatever the default values for those parameters is. Note that we do still need to do the module initialisation because some drivers have viable defaults set in case parameters aren't specified and some drivers support automatic configuration (e.g. PNP or PCI) in addition to manually coded parameters. This patch annotates drivers in drivers/scsi/. Suggested-by: One Thousand Gnomes Signed-off-by: David Howells cc: "Juergen E. Fischer" cc: "James E.J. Bottomley" cc: "Martin K. Petersen" cc: Dario Ballabio cc: Finn Thain cc: Michael Schmitz cc: Achim Leubner cc: linux-scsi@vger.kernel.org --- drivers/scsi/aha152x.c | 4 ++-- drivers/scsi/aha1542.c | 2 +- drivers/scsi/g_NCR5380.c | 8 ++++---- drivers/scsi/gdth.c | 2 +- drivers/scsi/qlogicfas.c | 4 ++-- 5 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c index f44d0487236e..ce5dc73d85bb 100644 --- a/drivers/scsi/aha152x.c +++ b/drivers/scsi/aha152x.c @@ -331,11 +331,11 @@ MODULE_LICENSE("GPL"); #if !defined(PCMCIA) #if defined(MODULE) static int io[] = {0, 0}; -module_param_array(io, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); MODULE_PARM_DESC(io,"base io address of controller"); static int irq[] = {0, 0}; -module_param_array(irq, int, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); MODULE_PARM_DESC(irq,"interrupt for controller"); static int scsiid[] = {7, 7}; diff --git a/drivers/scsi/aha1542.c b/drivers/scsi/aha1542.c index 7db448ec8beb..a23cc9ac5acd 100644 --- a/drivers/scsi/aha1542.c +++ b/drivers/scsi/aha1542.c @@ -31,7 +31,7 @@ module_param(isapnp, bool, 0); MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)"); static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 }; -module_param_array(io, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)"); /* time AHA spends on the AT-bus during data transfer */ diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c index cbf010324c18..cf4fa7a2e738 100644 --- a/drivers/scsi/g_NCR5380.c +++ b/drivers/scsi/g_NCR5380.c @@ -44,8 +44,8 @@ static int ncr_53c400; static int ncr_53c400a; static int dtc_3181e; static int hp_c2502; -module_param(ncr_irq, int, 0); -module_param(ncr_addr, int, 0); +module_param_hw(ncr_irq, int, irq, 0); +module_param_hw(ncr_addr, int, ioport, 0); module_param(ncr_5380, int, 0); module_param(ncr_53c400, int, 0); module_param(ncr_53c400a, int, 0); @@ -53,11 +53,11 @@ module_param(dtc_3181e, int, 0); module_param(hp_c2502, int, 0); static int irq[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; -module_param_array(irq, int, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); MODULE_PARM_DESC(irq, "IRQ number(s)"); static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; -module_param_array(base, int, NULL, 0); +module_param_hw_array(base, int, ioport, NULL, 0); MODULE_PARM_DESC(base, "base address(es)"); static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 }; diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c index 0a767740bf02..4ec08fb2dfa8 100644 --- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -353,7 +353,7 @@ static int probe_eisa_isa = 0; static int force_dma32 = 0; /* parameters for modprobe/insmod */ -module_param_array(irq, int, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param(disable, int, 0); module_param(reserve_mode, int, 0); module_param_array(reserve_list, int, NULL, 0); diff --git a/drivers/scsi/qlogicfas.c b/drivers/scsi/qlogicfas.c index 61cac87fb86f..840823b99e51 100644 --- a/drivers/scsi/qlogicfas.c +++ b/drivers/scsi/qlogicfas.c @@ -137,8 +137,8 @@ static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host, static struct qlogicfas408_priv *cards; static int iobase[MAX_QLOGICFAS]; static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 }; -module_param_array(iobase, int, NULL, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(iobase, int, ioport, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); MODULE_PARM_DESC(iobase, "I/O address"); MODULE_PARM_DESC(irq, "IRQ");