Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933976AbcLAMjL (ORCPT ); Thu, 1 Dec 2016 07:39:11 -0500 Received: from mx1.redhat.com ([209.132.183.28]:51912 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933722AbcLAMcn (ORCPT ); Thu, 1 Dec 2016 07:32:43 -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 19/39] Annotate hardware config module parameters in drivers/net/ethernet/ From: David Howells To: linux-kernel@vger.kernel.org Cc: minyard@acm.org, gnomes@lxorguk.ukuu.org.uk, Steffen Klassert , linux-parisc@vger.kernel.org, netdev@vger.kernel.org, Jaroslav Kysela , dhowells@redhat.com, linux-security-module@vger.kernel.org, keyrings@vger.kernel.org Date: Thu, 01 Dec 2016 12:32:09 +0000 Message-ID: <148059552991.31612.15441447924877381412.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 [10.5.110.39]); Thu, 01 Dec 2016 12:32:14 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 10247 Lines: 229 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/net/ethernet/. Suggested-by: One Thousand Gnomes Signed-off-by: David Howells cc: Steffen Klassert cc: Jaroslav Kysela cc: netdev@vger.kernel.org cc: linux-parisc@vger.kernel.org --- drivers/net/ethernet/3com/3c509.c | 2 +- drivers/net/ethernet/3com/3c59x.c | 4 ++-- drivers/net/ethernet/8390/ne.c | 4 ++-- drivers/net/ethernet/8390/smc-ultra.c | 4 ++-- drivers/net/ethernet/8390/wd.c | 8 ++++---- drivers/net/ethernet/amd/lance.c | 6 +++--- drivers/net/ethernet/amd/ni65.c | 6 +++--- drivers/net/ethernet/cirrus/cs89x0.c | 6 +++--- drivers/net/ethernet/dec/tulip/de4x5.c | 2 +- drivers/net/ethernet/hp/hp100.c | 2 +- drivers/net/ethernet/realtek/atp.c | 4 ++-- drivers/net/ethernet/smsc/smc9194.c | 4 ++-- 12 files changed, 26 insertions(+), 26 deletions(-) diff --git a/drivers/net/ethernet/3com/3c509.c b/drivers/net/ethernet/3com/3c509.c index 91ada52f776b..33a6d67ee182 100644 --- a/drivers/net/ethernet/3com/3c509.c +++ b/drivers/net/ethernet/3com/3c509.c @@ -1369,7 +1369,7 @@ el3_resume(struct device *pdev) #endif /* CONFIG_PM */ module_param(debug,int, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param(max_interrupt_work, int, 0); MODULE_PARM_DESC(debug, "debug level (0-6)"); MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c index 9133e7926da5..d041e3c7c3e6 100644 --- a/drivers/net/ethernet/3com/3c59x.c +++ b/drivers/net/ethernet/3com/3c59x.c @@ -813,8 +813,8 @@ module_param(global_enable_wol, int, 0); module_param_array(enable_wol, int, NULL, 0); module_param(rx_copybreak, int, 0); module_param(max_interrupt_work, int, 0); -module_param(compaq_ioaddr, int, 0); -module_param(compaq_irq, int, 0); +module_param_hw(compaq_ioaddr, int, ioport, 0); +module_param_hw(compaq_irq, int, irq, 0); module_param(compaq_device_id, int, 0); module_param(watchdog, int, 0); module_param(global_use_mmio, int, 0); diff --git a/drivers/net/ethernet/8390/ne.c b/drivers/net/ethernet/8390/ne.c index c063b410a163..66f47987e2a2 100644 --- a/drivers/net/ethernet/8390/ne.c +++ b/drivers/net/ethernet/8390/ne.c @@ -74,8 +74,8 @@ static int bad[MAX_NE_CARDS]; static u32 ne_msg_enable; #ifdef MODULE -module_param_array(io, int, NULL, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param_array(bad, int, NULL, 0); module_param_named(msg_enable, ne_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH)); MODULE_PARM_DESC(io, "I/O base address(es),required"); diff --git a/drivers/net/ethernet/8390/smc-ultra.c b/drivers/net/ethernet/8390/smc-ultra.c index 139385dcdaa7..c5dbf6938a4e 100644 --- a/drivers/net/ethernet/8390/smc-ultra.c +++ b/drivers/net/ethernet/8390/smc-ultra.c @@ -562,8 +562,8 @@ static struct net_device *dev_ultra[MAX_ULTRA_CARDS]; static int io[MAX_ULTRA_CARDS]; static int irq[MAX_ULTRA_CARDS]; -module_param_array(io, int, NULL, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param_named(msg_enable, ultra_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH)); MODULE_PARM_DESC(io, "I/O base address(es)"); MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)"); diff --git a/drivers/net/ethernet/8390/wd.c b/drivers/net/ethernet/8390/wd.c index dd7d816bde52..e16deef661e3 100644 --- a/drivers/net/ethernet/8390/wd.c +++ b/drivers/net/ethernet/8390/wd.c @@ -504,10 +504,10 @@ static int irq[MAX_WD_CARDS]; static int mem[MAX_WD_CARDS]; static int mem_end[MAX_WD_CARDS]; /* for non std. mem size */ -module_param_array(io, int, NULL, 0); -module_param_array(irq, int, NULL, 0); -module_param_array(mem, int, NULL, 0); -module_param_array(mem_end, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); +module_param_hw_array(mem, int, iomem, NULL, 0); +module_param_hw_array(mem_end, int, iomem, NULL, 0); module_param_named(msg_enable, wd_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH)); MODULE_PARM_DESC(io, "I/O base address(es)"); MODULE_PARM_DESC(irq, "IRQ number(s) (ignored for PureData boards)"); diff --git a/drivers/net/ethernet/amd/lance.c b/drivers/net/ethernet/amd/lance.c index abb1ba228b26..1b5603c30bd2 100644 --- a/drivers/net/ethernet/amd/lance.c +++ b/drivers/net/ethernet/amd/lance.c @@ -318,9 +318,9 @@ static int io[MAX_CARDS]; static int dma[MAX_CARDS]; static int irq[MAX_CARDS]; -module_param_array(io, int, NULL, 0); -module_param_array(dma, int, NULL, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); +module_param_hw_array(dma, int, dma, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param(lance_debug, int, 0); MODULE_PARM_DESC(io, "LANCE/PCnet I/O base address(es),required"); MODULE_PARM_DESC(dma, "LANCE/PCnet ISA DMA channel (ignored for some devices)"); diff --git a/drivers/net/ethernet/amd/ni65.c b/drivers/net/ethernet/amd/ni65.c index cda53db75f17..8b2e4deefdd4 100644 --- a/drivers/net/ethernet/amd/ni65.c +++ b/drivers/net/ethernet/amd/ni65.c @@ -1228,9 +1228,9 @@ static void set_multicast_list(struct net_device *dev) #ifdef MODULE static struct net_device *dev_ni65; -module_param(irq, int, 0); -module_param(io, int, 0); -module_param(dma, int, 0); +module_param_hw(irq, int, irq, 0); +module_param_hw(io, int, ioport, 0); +module_param_hw(dma, int, dma, 0); MODULE_PARM_DESC(irq, "ni6510 IRQ number (ignored for some cards)"); MODULE_PARM_DESC(io, "ni6510 I/O base address"); MODULE_PARM_DESC(dma, "ni6510 ISA DMA channel (ignored for some cards)"); diff --git a/drivers/net/ethernet/cirrus/cs89x0.c b/drivers/net/ethernet/cirrus/cs89x0.c index c363b58552e9..424f62b28c63 100644 --- a/drivers/net/ethernet/cirrus/cs89x0.c +++ b/drivers/net/ethernet/cirrus/cs89x0.c @@ -1705,12 +1705,12 @@ static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */ static int dma; static int dmasize = 16; /* or 64 */ -module_param(io, int, 0); -module_param(irq, int, 0); +module_param_hw(io, int, ioport, 0); +module_param_hw(irq, int, irq, 0); module_param(debug, int, 0); module_param_string(media, media, sizeof(media), 0); module_param(duplex, int, 0); -module_param(dma , int, 0); +module_param_hw(dma , int, dma, 0); module_param(dmasize , int, 0); module_param(use_dma , int, 0); MODULE_PARM_DESC(io, "cs89x0 I/O base address"); diff --git a/drivers/net/ethernet/dec/tulip/de4x5.c b/drivers/net/ethernet/dec/tulip/de4x5.c index 6620fc861c47..9ba1a318916d 100644 --- a/drivers/net/ethernet/dec/tulip/de4x5.c +++ b/drivers/net/ethernet/dec/tulip/de4x5.c @@ -1015,7 +1015,7 @@ static int compact_infoblock(struct net_device *dev, u_char count, u_char *p static int io=0x0;/* EDIT THIS LINE FOR YOUR CONFIGURATION IF NEEDED */ -module_param(io, int, 0); +module_param_hw(io, int, ioport, 0); module_param(de4x5_debug, int, 0); module_param(dec_only, int, 0); module_param(args, charp, 0); diff --git a/drivers/net/ethernet/hp/hp100.c b/drivers/net/ethernet/hp/hp100.c index 631dbc7b4dbb..eab44abb24ba 100644 --- a/drivers/net/ethernet/hp/hp100.c +++ b/drivers/net/ethernet/hp/hp100.c @@ -2968,7 +2968,7 @@ MODULE_DESCRIPTION("HP CASCADE Architecture Driver for 100VG-AnyLan Network Adap #define HP100_DEVICES 5 /* Parameters set by insmod */ static int hp100_port[HP100_DEVICES] = { 0, [1 ... (HP100_DEVICES-1)] = -1 }; -module_param_array(hp100_port, int, NULL, 0); +module_param_hw_array(hp100_port, int, ioport, NULL, 0); /* List of devices */ static struct net_device *hp100_devlist[HP100_DEVICES]; diff --git a/drivers/net/ethernet/realtek/atp.c b/drivers/net/ethernet/realtek/atp.c index 5cb96785fb63..619938322915 100644 --- a/drivers/net/ethernet/realtek/atp.c +++ b/drivers/net/ethernet/realtek/atp.c @@ -151,8 +151,8 @@ MODULE_LICENSE("GPL"); module_param(max_interrupt_work, int, 0); module_param(debug, int, 0); -module_param_array(io, int, NULL, 0); -module_param_array(irq, int, NULL, 0); +module_param_hw_array(io, int, ioport, NULL, 0); +module_param_hw_array(irq, int, irq, NULL, 0); module_param_array(xcvr, int, NULL, 0); MODULE_PARM_DESC(max_interrupt_work, "ATP maximum events handled per interrupt"); MODULE_PARM_DESC(debug, "ATP debug level (0-7)"); diff --git a/drivers/net/ethernet/smsc/smc9194.c b/drivers/net/ethernet/smsc/smc9194.c index d496888b85d3..1bfae24066ce 100644 --- a/drivers/net/ethernet/smsc/smc9194.c +++ b/drivers/net/ethernet/smsc/smc9194.c @@ -1502,8 +1502,8 @@ static void smc_set_multicast_list(struct net_device *dev) static struct net_device *devSMC9194; MODULE_LICENSE("GPL"); -module_param(io, int, 0); -module_param(irq, int, 0); +module_param_hw(io, int, ioport, 0); +module_param_hw(irq, int, irq, 0); module_param(ifport, int, 0); MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");