[PATCH security-next v4 30/32] capability: Initialize as LSM_ORDER_FIRST
From: Kees Cook <hidden>
Date: 2018-10-02 00:55:43
Also in:
linux-arch, linux-doc, lkml
Subsystem:
capabilities, security subsystem, the rest · Maintainers:
Serge Hallyn, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
This converts capabilities to use the new LSM_ORDER_FIRST position. Signed-off-by: Kees Cook <redacted> Reviewed-by: Casey Schaufler <casey@schaufler-ca.com> --- include/linux/lsm_hooks.h | 2 -- security/commoncap.c | 9 ++++++++- security/security.c | 9 ++++----- 3 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 62bc230826e0..36e7a716fdfe 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h@@ -2092,6 +2092,4 @@ static inline void security_delete_hooks(struct security_hook_list *hooks, #define __lsm_ro_after_init __ro_after_init #endif /* CONFIG_SECURITY_WRITABLE_HOOKS */ -extern void __init capability_add_hooks(void); - #endif /* ! __LINUX_LSM_HOOKS_H */
diff --git a/security/commoncap.c b/security/commoncap.c
index 2e489d6a3ac8..c928eb3fe784 100644
--- a/security/commoncap.c
+++ b/security/commoncap.c@@ -1366,10 +1366,17 @@ struct security_hook_list capability_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(vm_enough_memory, cap_vm_enough_memory), }; -void __init capability_add_hooks(void) +static int __init capability_init(void) { security_add_hooks(capability_hooks, ARRAY_SIZE(capability_hooks), "capability"); + return 0; } +DEFINE_LSM(capability) = { + .name = "capability", + .order = LSM_ORDER_FIRST, + .init = capability_init, +}; + #endif /* CONFIG_SECURITY */
diff --git a/security/security.c b/security/security.c
index dac379518e60..813dab3b5b97 100644
--- a/security/security.c
+++ b/security/security.c@@ -62,6 +62,10 @@ static __initdata bool debug; static bool __init is_enabled(struct lsm_info *lsm) { + /* LSM_ORDER_FIRST is always enabled. */ + if (lsm->order == LSM_ORDER_FIRST) + return true; + if (WARN_ON(!lsm->enabled)) return false;
@@ -306,11 +310,6 @@ int __init security_init(void) /* Figure out which LSMs are enabled and disabled. */ prepare_lsm_enable(); - /* - * Load minor LSMs, with the capability module always first. - */ - capability_add_hooks(); - /* Load LSMs in specified order. */ prepare_lsm_order(); ordered_lsm_init();
--
2.17.1