Linux v4.2

This is a squashed patch of the history from F22 + the 4.2 rebase

1 files changed, 182 insertions, 0 deletions

diff --git a/MODSIGN-Import-certificates-from-UEFI-Secure-Boot.patch b/MODSIGN-Import-certificates-from-UEFI-Secure-Boot.patch
new file mode 100644
index 000000000..b136acaf0
--- /dev/null
+++ b/MODSIGN-Import-certificates-from-UEFI-Secure-Boot.patch
@@ -0,0 +1,182 @@
+From: Josh Boyer <jwboyer@fedoraproject.org>
+Date: Fri, 26 Oct 2012 12:42:16 -0400
+Subject: [PATCH] MODSIGN: Import certificates from UEFI Secure Boot
+
+Secure Boot stores a list of allowed certificates in the 'db' variable.
+This imports those certificates into the system trusted keyring.  This
+allows for a third party signing certificate to be used in conjunction
+with signed modules.  By importing the public certificate into the 'db'
+variable, a user can allow a module signed with that certificate to
+load.  The shim UEFI bootloader has a similar certificate list stored
+in the 'MokListRT' variable.  We import those as well.
+
+In the opposite case, Secure Boot maintains a list of disallowed
+certificates in the 'dbx' variable.  We load those certificates into
+the newly introduced system blacklist keyring and forbid any module
+signed with those from loading.
+
+Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
+---
+ include/linux/efi.h   |  6 ++++
+ init/Kconfig          |  9 +++++
+ kernel/Makefile       |  3 ++
+ kernel/modsign_uefi.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++
+ 4 files changed, 110 insertions(+)
+ create mode 100644 kernel/modsign_uefi.c
+
+diff --git a/include/linux/efi.h b/include/linux/efi.h
+index 706b16fa6de8..470e8dfcb517 100644
+--- a/include/linux/efi.h
++++ b/include/linux/efi.h
+@@ -595,6 +595,12 @@ void efi_native_runtime_setup(void);
+ #define EFI_CERT_X509_GUID \
+     EFI_GUID(  0xa5c059a1, 0x94e4, 0x4aa7, 0x87, 0xb5, 0xab, 0x15, 0x5c, 0x2b, 0xf0, 0x72 )
+ 
++#define EFI_IMAGE_SECURITY_DATABASE_GUID \
++    EFI_GUID(  0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f )
++
++#define EFI_SHIM_LOCK_GUID \
++    EFI_GUID(  0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23 )
++
+ typedef struct {
+ 	efi_guid_t guid;
+ 	u64 table;
+diff --git a/init/Kconfig b/init/Kconfig
+index eca8ab59ae7f..9a782b02e4d5 100644
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -1888,6 +1888,15 @@ config MODULE_SIG_ALL
+ comment "Do not forget to sign required modules with scripts/sign-file"
+ 	depends on MODULE_SIG_FORCE && !MODULE_SIG_ALL
+ 
++config MODULE_SIG_UEFI
++	bool "Allow modules signed with certs stored in UEFI"
++	depends on MODULE_SIG && SYSTEM_BLACKLIST_KEYRING && EFI
++	select EFI_SIGNATURE_LIST_PARSER
++	help
++	  This will import certificates stored in UEFI and allow modules
++	  signed with those to be loaded.  It will also disallow loading
++	  of modules stored in the UEFI dbx variable.
++
+ choice
+ 	prompt "Which hash algorithm should modules be signed with?"
+ 	depends on MODULE_SIG
+diff --git a/kernel/Makefile b/kernel/Makefile
+index 1408b3353a3c..8a3be67a3a15 100644
+--- a/kernel/Makefile
++++ b/kernel/Makefile
+@@ -46,6 +46,7 @@ obj-$(CONFIG_UID16) += uid16.o
+ obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o
+ obj-$(CONFIG_MODULES) += module.o
+ obj-$(CONFIG_MODULE_SIG) += module_signing.o
++obj-$(CONFIG_MODULE_SIG_UEFI) += modsign_uefi.o
+ obj-$(CONFIG_KALLSYMS) += kallsyms.o
+ obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
+ obj-$(CONFIG_KEXEC) += kexec.o
+@@ -99,6 +100,8 @@ obj-$(CONFIG_TORTURE_TEST) += torture.o
+ 
+ $(obj)/configs.o: $(obj)/config_data.h
+ 
++$(obj)/modsign_uefi.o: KBUILD_CFLAGS += -fshort-wchar
++
+ # config_data.h contains the same information as ikconfig.h but gzipped.
+ # Info from config_data can be extracted from /proc/config*
+ targets += config_data.gz
+diff --git a/kernel/modsign_uefi.c b/kernel/modsign_uefi.c
+new file mode 100644
+index 000000000000..94b0eb38a284
+--- /dev/null
++++ b/kernel/modsign_uefi.c
+@@ -0,0 +1,92 @@
++#include <linux/kernel.h>
++#include <linux/sched.h>
++#include <linux/cred.h>
++#include <linux/err.h>
++#include <linux/efi.h>
++#include <linux/slab.h>
++#include <keys/asymmetric-type.h>
++#include <keys/system_keyring.h>
++#include "module-internal.h"
++
++static __init void *get_cert_list(efi_char16_t *name, efi_guid_t *guid, unsigned long *size)
++{
++	efi_status_t status;
++	unsigned long lsize = 4;
++	unsigned long tmpdb[4];
++	void *db = NULL;
++
++	status = efi.get_variable(name, guid, NULL, &lsize, &tmpdb);
++	if (status != EFI_BUFFER_TOO_SMALL) {
++		pr_err("Couldn't get size: 0x%lx\n", status);
++		return NULL;
++	}
++
++	db = kmalloc(lsize, GFP_KERNEL);
++	if (!db) {
++		pr_err("Couldn't allocate memory for uefi cert list\n");
++		goto out;
++	}
++
++	status = efi.get_variable(name, guid, NULL, &lsize, db);
++	if (status != EFI_SUCCESS) {
++		kfree(db);
++		db = NULL;
++		pr_err("Error reading db var: 0x%lx\n", status);
++	}
++out:
++	*size = lsize;
++	return db;
++}
++
++/*
++ *  * Load the certs contained in the UEFI databases
++ *   */
++static int __init load_uefi_certs(void)
++{
++	efi_guid_t secure_var = EFI_IMAGE_SECURITY_DATABASE_GUID;
++	efi_guid_t mok_var = EFI_SHIM_LOCK_GUID;
++	void *db = NULL, *dbx = NULL, *mok = NULL;
++	unsigned long dbsize = 0, dbxsize = 0, moksize = 0;
++	int rc = 0;
++
++	/* Check if SB is enabled and just return if not */
++	if (!efi_enabled(EFI_SECURE_BOOT))
++		return 0;
++
++	/* Get db, MokListRT, and dbx.  They might not exist, so it isn't
++	 * an error if we can't get them.
++	 */
++	db = get_cert_list(L"db", &secure_var, &dbsize);
++	if (!db) {
++		pr_err("MODSIGN: Couldn't get UEFI db list\n");
++	} else {
++		rc = parse_efi_signature_list(db, dbsize, system_trusted_keyring);
++		if (rc)
++			pr_err("Couldn't parse db signatures: %d\n", rc);
++		kfree(db);
++	}
++
++	mok = get_cert_list(L"MokListRT", &mok_var, &moksize);
++	if (!mok) {
++		pr_info("MODSIGN: Couldn't get UEFI MokListRT\n");
++	} else {
++		rc = parse_efi_signature_list(mok, moksize, system_trusted_keyring);
++		if (rc)
++			pr_err("Couldn't parse MokListRT signatures: %d\n", rc);
++		kfree(mok);
++	}
++
++	dbx = get_cert_list(L"dbx", &secure_var, &dbxsize);
++	if (!dbx) {
++		pr_info("MODSIGN: Couldn't get UEFI dbx list\n");
++	} else {
++		rc = parse_efi_signature_list(dbx, dbxsize,
++			system_blacklist_keyring);
++		if (rc)
++			pr_err("Couldn't parse dbx signatures: %d\n", rc);
++		kfree(dbx);
++	}
++
++	return rc;
++}
++late_initcall(load_uefi_certs);