diff options
Diffstat (limited to 'security/landlock/cred.h')
| -rw-r--r-- | security/landlock/cred.h | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/security/landlock/cred.h b/security/landlock/cred.h index eb691130dd67..3bf18551d7b8 100644 --- a/security/landlock/cred.h +++ b/security/landlock/cred.h @@ -10,17 +10,47 @@ #ifndef _SECURITY_LANDLOCK_CRED_H #define _SECURITY_LANDLOCK_CRED_H +#include <linux/container_of.h> #include <linux/cred.h> #include <linux/init.h> #include <linux/rcupdate.h> #include "access.h" +#include "limits.h" #include "ruleset.h" #include "setup.h" +/** + * struct landlock_cred_security - Credential security blob + * + * This structure is packed to minimize the size of struct + * landlock_file_security. However, it is always aligned in the LSM cred blob, + * see lsm_set_blob_size(). + */ struct landlock_cred_security { + /** + * @domain: Immutable ruleset enforced on a task. + */ struct landlock_ruleset *domain; -}; + +#ifdef CONFIG_AUDIT + /** + * @domain_exec: Bitmask identifying the domain layers that were enforced by + * the current task's executed file (i.e. no new execve(2) since + * landlock_restrict_self(2)). + */ + u16 domain_exec; +#endif /* CONFIG_AUDIT */ +} __packed; + +#ifdef CONFIG_AUDIT + +/* Makes sure all layer executions can be stored. */ +static_assert(BITS_PER_TYPE(typeof_member(struct landlock_cred_security, + domain_exec)) >= + LANDLOCK_MAX_NUM_LAYERS); + +#endif /* CONFIG_AUDIT */ static inline struct landlock_cred_security * landlock_cred(const struct cred *cred) |