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From: Matthew Garrett <matthewgarrett@google.com>
To: jmorris@namei.org
Cc: linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
	David Howells <dhowells@redhat.com>,
	Dominik Brodowski <linux@dominikbrodowski.net>,
	Matthew Garrett <mjg59@google.com>
Subject: [PATCH V34 17/29] Prohibit PCMCIA CIS storage when the kernel is locked down
Date: Fri, 21 Jun 2019 17:03:46 -0700	[thread overview]
Message-ID: <20190622000358.19895-18-matthewgarrett@google.com> (raw)
In-Reply-To: <20190622000358.19895-1-matthewgarrett@google.com>

From: David Howells <dhowells@redhat.com>

Prohibit replacement of the PCMCIA Card Information Structure when the
kernel is locked down.

Suggested-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Garrett <mjg59@google.com>
---
 drivers/pcmcia/cistpl.c      | 5 +++++
 include/linux/security.h     | 1 +
 security/lockdown/lockdown.c | 1 +
 3 files changed, 7 insertions(+)

diff --git a/drivers/pcmcia/cistpl.c b/drivers/pcmcia/cistpl.c
index ac0672b8dfca..379c53610102 100644
--- a/drivers/pcmcia/cistpl.c
+++ b/drivers/pcmcia/cistpl.c
@@ -24,6 +24,7 @@
 #include <linux/pci.h>
 #include <linux/ioport.h>
 #include <linux/io.h>
+#include <linux/security.h>
 #include <asm/byteorder.h>
 #include <asm/unaligned.h>
 
@@ -1578,6 +1579,10 @@ static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj,
 	struct pcmcia_socket *s;
 	int error;
 
+	error = security_locked_down(LOCKDOWN_PCMCIA_CIS);
+	if (error)
+		return error;
+
 	s = to_socket(container_of(kobj, struct device, kobj));
 
 	if (off)
diff --git a/include/linux/security.h b/include/linux/security.h
index cc2b5ee4cadd..03c125b277ca 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -90,6 +90,7 @@ enum lockdown_reason {
 	LOCKDOWN_IOPORT,
 	LOCKDOWN_MSR,
 	LOCKDOWN_ACPI_TABLES,
+	LOCKDOWN_PCMCIA_CIS,
 	LOCKDOWN_INTEGRITY_MAX,
 	LOCKDOWN_CONFIDENTIALITY_MAX,
 };
diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c
index 1725224f0024..7be3e8fb5847 100644
--- a/security/lockdown/lockdown.c
+++ b/security/lockdown/lockdown.c
@@ -26,6 +26,7 @@ static char *lockdown_reasons[LOCKDOWN_CONFIDENTIALITY_MAX+1] = {
 	[LOCKDOWN_IOPORT] = "raw io port access",
 	[LOCKDOWN_MSR] = "raw MSR access",
 	[LOCKDOWN_ACPI_TABLES] = "modified ACPI tables",
+	[LOCKDOWN_PCMCIA_CIS] = "direct PCMCIA CIS storage",
 	[LOCKDOWN_INTEGRITY_MAX] = "integrity",
 	[LOCKDOWN_CONFIDENTIALITY_MAX] = "confidentiality",
 };
-- 
2.22.0.410.gd8fdbe21b5-goog


  parent reply	other threads:[~2019-06-22  0:04 UTC|newest]

Thread overview: 97+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-22  0:03 [PATCH V34 00/29] Lockdown as an LSM Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 01/29] security: Support early LSMs Matthew Garrett
2019-06-22 23:36   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 02/29] security: Add a "locked down" LSM hook Matthew Garrett
2019-06-22 23:37   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 03/29] security: Add a static lockdown policy LSM Matthew Garrett
2019-06-22 23:37   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 04/29] Enforce module signatures if the kernel is locked down Matthew Garrett
2019-06-22 23:48   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 05/29] Restrict /dev/{mem,kmem,port} when " Matthew Garrett
2019-06-22 23:52   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 06/29] kexec_load: Disable at runtime if " Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-22 23:52   ` Kees Cook
2019-06-22 23:52     ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 07/29] Copy secure_boot flag in boot params across kexec reboot Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-22 23:53   ` Kees Cook
2019-06-22 23:53     ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 08/29] kexec_file: split KEXEC_VERIFY_SIG into KEXEC_SIG and KEXEC_SIG_FORCE Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-24  2:01   ` Dave Young
2019-06-24  2:01     ` Dave Young
2019-06-25  2:35     ` Dave Young
2019-06-25  2:35       ` Dave Young
2019-06-22  0:03 ` [PATCH V34 09/29] kexec_file: Restrict at runtime if the kernel is locked down Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-22 23:54   ` Kees Cook
2019-06-22 23:54     ` Kees Cook
2019-06-27  4:59   ` James Morris
2019-06-27  4:59     ` James Morris
2019-06-27 15:28     ` Matthew Garrett
2019-06-27 15:28       ` Matthew Garrett
2019-06-27 18:14       ` James Morris
2019-06-27 18:14         ` James Morris
2019-06-27 18:14         ` James Morris
2019-06-27 23:17         ` Matthew Garrett
2019-06-27 23:17           ` Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 10/29] hibernate: Disable when " Matthew Garrett
2019-06-22 17:52   ` Pavel Machek
2019-06-24 13:21     ` Jiri Kosina
2019-07-10 15:26       ` Joey Lee
2019-07-10 15:26         ` Joey Lee
2019-07-11  4:11       ` joeyli
2019-06-22 23:55   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 11/29] PCI: Lock down BAR access " Matthew Garrett
2019-06-22 23:55   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 12/29] x86: Lock down IO port " Matthew Garrett
2019-06-22 23:58   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 13/29] x86/msr: Restrict MSR " Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 14/29] ACPI: Limit access to custom_method " Matthew Garrett
2019-06-22 23:59   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 15/29] acpi: Ignore acpi_rsdp kernel param when the kernel has been " Matthew Garrett
2019-06-22 23:59   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 16/29] acpi: Disable ACPI table override if the kernel is " Matthew Garrett
2019-06-22  0:03   ` Matthew Garrett
2019-06-23  0:00   ` Kees Cook
2019-06-22  0:03 ` Matthew Garrett [this message]
2019-06-23  0:00   ` [PATCH V34 17/29] Prohibit PCMCIA CIS storage when " Kees Cook
2019-06-22  0:03 ` [PATCH V34 18/29] Lock down TIOCSSERIAL Matthew Garrett
2019-06-23  0:01   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 19/29] Lock down module params that specify hardware parameters (eg. ioport) Matthew Garrett
2019-06-23  0:04   ` Kees Cook
2019-06-27  1:49   ` Daniel Axtens
2019-06-27 15:30     ` Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 20/29] x86/mmiotrace: Lock down the testmmiotrace module Matthew Garrett
2019-06-23  0:04   ` Kees Cook
2019-06-23 11:08   ` Thomas Gleixner
2019-06-22  0:03 ` [PATCH V34 21/29] Lock down /proc/kcore Matthew Garrett
2019-06-23  0:05   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 22/29] Lock down tracing and perf kprobes when in confidentiality mode Matthew Garrett
2019-06-23  0:09   ` Kees Cook
2019-06-23  1:57   ` Masami Hiramatsu
2019-06-22  0:03 ` [PATCH V34 23/29] bpf: Restrict bpf when kernel lockdown is " Matthew Garrett
2019-06-23  0:09   ` Kees Cook
2019-06-24 15:15   ` Daniel Borkmann
2019-06-24 19:54     ` Matthew Garrett
2019-06-24 20:08       ` Andy Lutomirski
2019-06-24 20:15         ` Matthew Garrett
2019-06-24 20:59         ` Daniel Borkmann
2019-06-24 21:30           ` Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 24/29] Lock down perf when " Matthew Garrett
2019-06-23  0:12   ` Kees Cook
2019-06-22  0:03 ` [PATCH V34 25/29] kexec: Allow kexec_file() with appropriate IMA policy when locked down Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 26/29] debugfs: Restrict debugfs when the kernel is " Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 27/29] tracefs: Restrict tracefs " Matthew Garrett
2019-06-22  0:03 ` [PATCH V34 28/29] efi: Restrict efivar_ssdt_load " Matthew Garrett
2019-06-23  0:14   ` Kees Cook
2019-06-25 15:00   ` Ard Biesheuvel
2019-06-22  0:03 ` [PATCH V34 29/29] lockdown: Print current->comm in restriction messages Matthew Garrett
2019-06-23  0:25   ` Kees Cook
2019-06-24 23:01 ` [PATCH V34 00/29] Lockdown as an LSM James Morris
2019-06-24 23:47   ` Casey Schaufler
2019-06-24 23:56   ` Matthew Garrett
2019-06-25  6:04     ` James Morris
2019-06-25  8:16   ` John Johansen

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