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Hermes SMTP Server) with ESMTPA ID cee108ccde84a9105dc7ebe9516c7326; Tue, 25 Oct 2022 18:45:26 +0000 (UTC) From: Casey Schaufler To: casey.schaufler@intel.com, paul@paul-moore.com, linux-security-module@vger.kernel.org Cc: casey@schaufler-ca.com, jmorris@namei.org, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, stephen.smalley.work@gmail.com, linux-kernel@vger.kernel.org, linux-api@vger.kernel.org, mic@digikod.net Subject: [PATCH v1 2/8] LSM: Add an LSM identifier for external use Date: Tue, 25 Oct 2022 11:45:13 -0700 Message-Id: <20221025184519.13231-3-casey@schaufler-ca.com> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20221025184519.13231-1-casey@schaufler-ca.com> References: <20221025184519.13231-1-casey@schaufler-ca.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1747686400243372594?= X-GMAIL-MSGID: =?utf-8?q?1747686400243372594?= Add an integer member "id" to the struct lsm_id. This value is a unique identifier associated with each security module. The values are defined in a new UAPI header file. Each existing LSM has been updated to include it's LSMID in the lsm_id. The LSM ID values are sequential, with the oldest module LSM_ID_CAPABILITY being the lowest value and the existing modules numbered in the order they were included in the main line kernel. The first 32 values (0 - 31) are reserved for some as yet unknown but important use. Signed-off-by: Casey Schaufler Nacked-by: Tetsuo Handa --- include/linux/lsm_hooks.h | 1 + include/uapi/linux/lsm.h | 32 ++++++++++++++++++++++++++++++++ security/apparmor/lsm.c | 2 ++ security/bpf/hooks.c | 2 ++ security/commoncap.c | 2 ++ security/landlock/setup.c | 2 ++ security/loadpin/loadpin.c | 2 ++ security/lockdown/lockdown.c | 2 ++ security/safesetid/lsm.c | 2 ++ security/selinux/hooks.c | 2 ++ security/smack/smack_lsm.c | 2 ++ security/tomoyo/tomoyo.c | 2 ++ security/yama/yama_lsm.c | 2 ++ 13 files changed, 55 insertions(+) create mode 100644 include/uapi/linux/lsm.h diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h index e383e468f742..dd4b4d95a172 100644 --- a/include/linux/lsm_hooks.h +++ b/include/linux/lsm_hooks.h @@ -1607,6 +1607,7 @@ struct security_hook_heads { */ struct lsm_id { const char *lsm; /* Name of the LSM */ + int id; /* LSM ID */ }; /* diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h new file mode 100644 index 000000000000..d5bcbb9375df --- /dev/null +++ b/include/uapi/linux/lsm.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Linus Security Modules (LSM) - User space API + * + * Copyright (C) 2022 Casey Schaufler + * Copyright (C) Intel Corporation + */ + +#ifndef _UAPI_LINUX_LSM_H +#define _UAPI_LINUX_LSM_H + +/* + * ID values to identify security modules. + * A system may use more than one security module. + * + * LSM_ID_XXX values 0 - 31 are reserved for future use + */ +#define LSM_ID_INVALID -1 +#define LSM_ID_CAPABILITY 32 +#define LSM_ID_SELINUX 33 +#define LSM_ID_SMACK 34 +#define LSM_ID_TOMOYO 35 +#define LSM_ID_IMA 36 +#define LSM_ID_APPARMOR 37 +#define LSM_ID_YAMA 38 +#define LSM_ID_LOADPIN 39 +#define LSM_ID_SAFESETID 40 +#define LSM_ID_LOCKDOWN 41 +#define LSM_ID_BPF 42 +#define LSM_ID_LANDLOCK 43 + +#endif /* _UAPI_LINUX_LSM_H */ diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index e708c1ad7267..b859b1af6c75 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -24,6 +24,7 @@ #include #include #include +#include #include "include/apparmor.h" #include "include/apparmorfs.h" @@ -1204,6 +1205,7 @@ struct lsm_blob_sizes apparmor_blob_sizes __lsm_ro_after_init = { static struct lsm_id apparmor_lsmid __lsm_ro_after_init = { .lsm = "apparmor", + .id = LSM_ID_APPARMOR, }; static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = { diff --git a/security/bpf/hooks.c b/security/bpf/hooks.c index ef9b1d983665..20983ae8d31f 100644 --- a/security/bpf/hooks.c +++ b/security/bpf/hooks.c @@ -5,6 +5,7 @@ */ #include #include +#include static struct security_hook_list bpf_lsm_hooks[] __lsm_ro_after_init = { #define LSM_HOOK(RET, DEFAULT, NAME, ...) \ @@ -21,6 +22,7 @@ static struct security_hook_list bpf_lsm_hooks[] __lsm_ro_after_init = { */ struct lsm_id bpf_lsmid __lsm_ro_after_init = { .lsm = "bpf", + .id = LSM_ID_BPF, }; static int __init bpf_lsm_init(void) diff --git a/security/commoncap.c b/security/commoncap.c index 986920da0c26..940e36d8503d 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -25,6 +25,7 @@ #include #include #include +#include /* * If a non-root user executes a setuid-root binary in @@ -1448,6 +1449,7 @@ int cap_mmap_file(struct file *file, unsigned long reqprot, static struct lsm_id capability_lsmid __lsm_ro_after_init = { .lsm = "capability", + .id = LSM_ID_CAPABILITY, }; static struct security_hook_list capability_hooks[] __lsm_ro_after_init = { diff --git a/security/landlock/setup.c b/security/landlock/setup.c index 4a12666a4090..5b32c087e34b 100644 --- a/security/landlock/setup.c +++ b/security/landlock/setup.c @@ -8,6 +8,7 @@ #include #include +#include #include "common.h" #include "cred.h" @@ -25,6 +26,7 @@ struct lsm_blob_sizes landlock_blob_sizes __lsm_ro_after_init = { struct lsm_id landlock_lsmid __lsm_ro_after_init = { .lsm = LANDLOCK_NAME, + .id = LSM_ID_LANDLOCK, }; static int __init landlock_init(void) diff --git a/security/loadpin/loadpin.c b/security/loadpin/loadpin.c index 24d041a888b8..32bdf7294a6f 100644 --- a/security/loadpin/loadpin.c +++ b/security/loadpin/loadpin.c @@ -20,6 +20,7 @@ #include #include #include +#include #define VERITY_DIGEST_FILE_HEADER "# LOADPIN_TRUSTED_VERITY_ROOT_DIGESTS" @@ -199,6 +200,7 @@ static int loadpin_load_data(enum kernel_load_data_id id, bool contents) static struct lsm_id loadpin_lsmid __lsm_ro_after_init = { .lsm = "loadpin", + .id = LSM_ID_LOADPIN, }; static struct security_hook_list loadpin_hooks[] __lsm_ro_after_init = { diff --git a/security/lockdown/lockdown.c b/security/lockdown/lockdown.c index 2004d67f7201..e8c41a0caf7d 100644 --- a/security/lockdown/lockdown.c +++ b/security/lockdown/lockdown.c @@ -13,6 +13,7 @@ #include #include #include +#include static enum lockdown_reason kernel_locked_down; @@ -77,6 +78,7 @@ static struct security_hook_list lockdown_hooks[] __lsm_ro_after_init = { static struct lsm_id lockdown_lsmid __lsm_ro_after_init = { .lsm = "lockdown", + .id = LSM_ID_LOCKDOWN, }; static int __init lockdown_lsm_init(void) diff --git a/security/safesetid/lsm.c b/security/safesetid/lsm.c index d9af1d04d293..8d0742ba045d 100644 --- a/security/safesetid/lsm.c +++ b/security/safesetid/lsm.c @@ -19,6 +19,7 @@ #include #include #include +#include #include "lsm.h" /* Flag indicating whether initialization completed */ @@ -263,6 +264,7 @@ static int safesetid_task_fix_setgroups(struct cred *new, const struct cred *old static struct lsm_id safesetid_lsmid __lsm_ro_after_init = { .lsm = "safesetid", + .id = LSM_ID_SAFESETID, }; static struct security_hook_list safesetid_security_hooks[] = { diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index aee20bb1778d..5fcce36267bd 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -92,6 +92,7 @@ #include #include #include +#include #include "avc.h" #include "objsec.h" @@ -7016,6 +7017,7 @@ static int selinux_uring_cmd(struct io_uring_cmd *ioucmd) static struct lsm_id selinux_lsmid __lsm_ro_after_init = { .lsm = "selinux", + .id = LSM_ID_SELINUX, }; /* diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 0c0fea933bbd..c7ba80e20b8d 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -43,6 +43,7 @@ #include #include #include +#include #include "smack.h" #define TRANS_TRUE "TRUE" @@ -4789,6 +4790,7 @@ struct lsm_blob_sizes smack_blob_sizes __lsm_ro_after_init = { static struct lsm_id smack_lsmid __lsm_ro_after_init = { .lsm = "smack", + .id = LSM_ID_SMACK, }; static struct security_hook_list smack_hooks[] __lsm_ro_after_init = { diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c index 80fbab5d2d7e..1916eb6216f7 100644 --- a/security/tomoyo/tomoyo.c +++ b/security/tomoyo/tomoyo.c @@ -6,6 +6,7 @@ */ #include +#include #include "common.h" /** @@ -532,6 +533,7 @@ static void tomoyo_task_free(struct task_struct *task) static struct lsm_id tomoyo_lsmid __lsm_ro_after_init = { .lsm = "tomoyo", + .id = LSM_ID_TOMOYO, }; /* diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c index 4f60158850a7..2487b8f847f3 100644 --- a/security/yama/yama_lsm.c +++ b/security/yama/yama_lsm.c @@ -18,6 +18,7 @@ #include #include #include +#include #define YAMA_SCOPE_DISABLED 0 #define YAMA_SCOPE_RELATIONAL 1 @@ -423,6 +424,7 @@ static int yama_ptrace_traceme(struct task_struct *parent) static struct lsm_id yama_lsmid __lsm_ro_after_init = { .lsm = "yama", + .id = LSM_ID_YAMA, }; static struct security_hook_list yama_hooks[] __lsm_ro_after_init = {