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LSM: Convert from initcall to struct lsm_info

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In preparation for doing more interesting LSM init probing, this converts
the existing initcall system into an explicit call into a function pointer
from a section-collected struct lsm_info array.

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: James Morris <james.morris@microsoft.com>
Reviewed-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
This commit is contained in:
Kees Cook 2018-10-10 17:18:21 -07:00 • committed by James Morris
parent 6907e3746f
commit 5b89c1bd4c
5 changed files with 18 additions and 12 deletions
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12
include/linux/lsm_hooks.h
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@ -2039,6 +2039,18 @@ extern char *lsm_names;
extern void security_add_hooks(struct security_hook_list *hooks, int count,
char *lsm);
struct lsm_info {
int (*init)(void); /* Required. */
};
extern struct lsm_info __start_lsm_info[], __end_lsm_info[];
#define security_initcall(lsm) \
static struct lsm_info __lsm_##lsm \
__used __section(.lsm_info.init) \
__aligned(sizeof(unsigned long)) \
= { .init = lsm, }
#ifdef CONFIG_SECURITY_SELINUX_DISABLE
/*
* Assuring the safety of deleting a security module is up to