Add an integer member "features" to the struct lsm_id which
identifies the API related data associated with each security
module. The initial set of features maps to information that
has traditionaly been available in /proc/self/attr.
Signed-off-by: Casey Schaufler <casey@xxxxxxxxxxxxxxxx>
---
include/linux/lsm_hooks.h | 1 +
include/uapi/linux/lsm.h | 14 ++++++++++++++
security/apparmor/lsm.c | 1 +
security/selinux/hooks.c | 2 ++
security/smack/smack_lsm.c | 1 +
5 files changed, 19 insertions(+)
diff --git a/include/linux/lsm_hooks.h b/include/linux/lsm_hooks.h
index 407f57aaa6ef..ded76db3f523 100644
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
@@ -1604,6 +1604,7 @@ struct security_hook_heads {
struct lsm_id {
const char *lsm; /* Name of the LSM */
int id; /* LSM ID */
+ int features; /* Set of LSM features */
};
/*
diff --git a/include/uapi/linux/lsm.h b/include/uapi/linux/lsm.h
index 5647c3e220c0..4bb692b84a28 100644
--- a/include/uapi/linux/lsm.h
+++ b/include/uapi/linux/lsm.h
@@ -29,4 +29,18 @@
#define LSM_ID_LANDLOCK 43
#define LSM_ID_CAPABILITY 44
+/*
+ * LSM_ATTR_XXX values identify the /proc/.../attr entry that the
+ * context represents. Not all security modules provide all of these
+ * values. Some security modules provide none of them.
+ */
+/* clang-format off */
+#define LSM_ATTR_CURRENT (1UL << 0)
+#define LSM_ATTR_EXEC (1UL << 1)
+#define LSM_ATTR_FSCREATE (1UL << 2)
+#define LSM_ATTR_KEYCREATE (1UL << 3)
+#define LSM_ATTR_PREV (1UL << 4)
+#define LSM_ATTR_SOCKCREATE (1UL << 5)
+/* clang-format on */
+
#endif /* _UAPI_LINUX_LSM_H */
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index fb6c7edd5393..40266cc4866c 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1206,6 +1206,7 @@ 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,
+ .features = LSM_ATTR_CURRENT | LSM_ATTR_PREV | LSM_ATTR_EXEC,
};
static struct security_hook_list apparmor_hooks[] __lsm_ro_after_init = {
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9803bbbc6747..625cc791c440 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -7016,6 +7016,8 @@ 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,
+ .features = LSM_ATTR_CURRENT | LSM_ATTR_EXEC | LSM_ATTR_FSCREATE |
+ LSM_ATTR_KEYCREATE | LSM_ATTR_PREV | LSM_ATTR_SOCKCREATE,
};
/*
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 2a88b4e7669e..e79640a6bfd7 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -4778,6 +4778,7 @@ 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,
+ .features = LSM_ATTR_CURRENT,
};
static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
--
2.37.3
