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-rw-r--r--security/selinux/include/security.h394
1 files changed, 285 insertions, 109 deletions
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h
index 8fd8e18ea340..5d1dad8058b1 100644
--- a/security/selinux/include/security.h
+++ b/security/selinux/include/security.h
@@ -1,96 +1,233 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Security server interface.
*
- * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
+ * Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
*
*/
#ifndef _SELINUX_SECURITY_H_
#define _SELINUX_SECURITY_H_
+#include <linux/compiler.h>
#include <linux/dcache.h>
#include <linux/magic.h>
#include <linux/types.h>
+#include <linux/rcupdate.h>
+#include <linux/refcount.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+#include <linux/printk.h>
#include "flask.h"
+#include "policycap.h"
-#define SECSID_NULL 0x00000000 /* unspecified SID */
-#define SECSID_WILD 0xffffffff /* wildcard SID */
-#define SECCLASS_NULL 0x0000 /* no class */
+#define SECSID_NULL 0x00000000 /* unspecified SID */
+#define SECSID_WILD 0xffffffff /* wildcard SID */
+#define SECCLASS_NULL 0x0000 /* no class */
/* Identify specific policy version changes */
-#define POLICYDB_VERSION_BASE 15
-#define POLICYDB_VERSION_BOOL 16
-#define POLICYDB_VERSION_IPV6 17
-#define POLICYDB_VERSION_NLCLASS 18
-#define POLICYDB_VERSION_VALIDATETRANS 19
-#define POLICYDB_VERSION_MLS 19
-#define POLICYDB_VERSION_AVTAB 20
-#define POLICYDB_VERSION_RANGETRANS 21
-#define POLICYDB_VERSION_POLCAP 22
-#define POLICYDB_VERSION_PERMISSIVE 23
-#define POLICYDB_VERSION_BOUNDARY 24
-#define POLICYDB_VERSION_FILENAME_TRANS 25
-#define POLICYDB_VERSION_ROLETRANS 26
-#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
-#define POLICYDB_VERSION_DEFAULT_TYPE 28
+#define POLICYDB_VERSION_BASE 15
+#define POLICYDB_VERSION_BOOL 16
+#define POLICYDB_VERSION_IPV6 17
+#define POLICYDB_VERSION_NLCLASS 18
+#define POLICYDB_VERSION_VALIDATETRANS 19
+#define POLICYDB_VERSION_MLS 19
+#define POLICYDB_VERSION_AVTAB 20
+#define POLICYDB_VERSION_RANGETRANS 21
+#define POLICYDB_VERSION_POLCAP 22
+#define POLICYDB_VERSION_PERMISSIVE 23
+#define POLICYDB_VERSION_BOUNDARY 24
+#define POLICYDB_VERSION_FILENAME_TRANS 25
+#define POLICYDB_VERSION_ROLETRANS 26
+#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27
+#define POLICYDB_VERSION_DEFAULT_TYPE 28
+#define POLICYDB_VERSION_CONSTRAINT_NAMES 29
+#define POLICYDB_VERSION_XPERMS_IOCTL 30
+#define POLICYDB_VERSION_INFINIBAND 31
+#define POLICYDB_VERSION_GLBLUB 32
+#define POLICYDB_VERSION_COMP_FTRANS 33 /* compressed filename transitions */
+#define POLICYDB_VERSION_COND_XPERMS 34 /* extended permissions in conditional policies */
+#define POLICYDB_VERSION_NEVERAUDIT 35 /* neveraudit types */
/* Range of policy versions we understand*/
-#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
-#ifdef CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX
-#define POLICYDB_VERSION_MAX CONFIG_SECURITY_SELINUX_POLICYDB_VERSION_MAX_VALUE
-#else
-#define POLICYDB_VERSION_MAX POLICYDB_VERSION_DEFAULT_TYPE
-#endif
+#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE
+#define POLICYDB_VERSION_MAX POLICYDB_VERSION_NEVERAUDIT
/* Mask for just the mount related flags */
-#define SE_MNTMASK 0x0f
+#define SE_MNTMASK 0x0f
/* Super block security struct flags for mount options */
+/* BE CAREFUL, these need to be the low order bits for selinux_get_mnt_opts */
#define CONTEXT_MNT 0x01
#define FSCONTEXT_MNT 0x02
-#define ROOTCONTEXT_MNT 0x04
+#define ROOTCONTEXT_MNT 0x04
#define DEFCONTEXT_MNT 0x08
+#define SBLABEL_MNT 0x10
/* Non-mount related flags */
-#define SE_SBINITIALIZED 0x10
-#define SE_SBPROC 0x20
-#define SE_SBLABELSUPP 0x40
-
-#define CONTEXT_STR "context="
-#define FSCONTEXT_STR "fscontext="
-#define ROOTCONTEXT_STR "rootcontext="
-#define DEFCONTEXT_STR "defcontext="
-#define LABELSUPP_STR "seclabel"
+#define SE_SBINITIALIZED 0x0100
+#define SE_SBPROC 0x0200
+#define SE_SBGENFS 0x0400
+#define SE_SBGENFS_XATTR 0x0800
+#define SE_SBNATIVE 0x1000
+
+#define CONTEXT_STR "context"
+#define FSCONTEXT_STR "fscontext"
+#define ROOTCONTEXT_STR "rootcontext"
+#define DEFCONTEXT_STR "defcontext"
+#define SECLABEL_STR "seclabel"
struct netlbl_lsm_secattr;
-extern int selinux_enabled;
-
-/* Policy capabilities */
-enum {
- POLICYDB_CAPABILITY_NETPEER,
- POLICYDB_CAPABILITY_OPENPERM,
- __POLICYDB_CAPABILITY_MAX
-};
-#define POLICYDB_CAPABILITY_MAX (__POLICYDB_CAPABILITY_MAX - 1)
-
-extern int selinux_policycap_netpeer;
-extern int selinux_policycap_openperm;
+extern int selinux_enabled_boot;
/*
* type_datum properties
* available at the kernel policy version >= POLICYDB_VERSION_BOUNDARY
*/
-#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
-#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
+#define TYPEDATUM_PROPERTY_PRIMARY 0x0001
+#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002
/* limitation of boundary depth */
-#define POLICYDB_BOUNDS_MAXDEPTH 4
+#define POLICYDB_BOUNDS_MAXDEPTH 4
-int security_mls_enabled(void);
+struct selinux_policy;
-int security_load_policy(void *data, size_t len);
-int security_read_policy(void **data, size_t *len);
-size_t security_policydb_len(void);
+struct selinux_state {
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+ bool enforcing;
+#endif
+ bool initialized;
+ bool policycap[__POLICYDB_CAP_MAX];
+
+ struct page *status_page;
+ struct mutex status_lock;
+
+ struct selinux_policy __rcu *policy;
+ struct mutex policy_mutex;
+} __randomize_layout;
+
+void selinux_avc_init(void);
+
+extern struct selinux_state selinux_state;
+
+static inline bool selinux_initialized(void)
+{
+ /* do a synchronized load to avoid race conditions */
+ return smp_load_acquire(&selinux_state.initialized);
+}
+
+static inline void selinux_mark_initialized(void)
+{
+ /* do a synchronized write to avoid race conditions */
+ smp_store_release(&selinux_state.initialized, true);
+}
+
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+static inline bool enforcing_enabled(void)
+{
+ return READ_ONCE(selinux_state.enforcing);
+}
+
+static inline void enforcing_set(bool value)
+{
+ WRITE_ONCE(selinux_state.enforcing, value);
+}
+#else
+static inline bool enforcing_enabled(void)
+{
+ return true;
+}
+
+static inline void enforcing_set(bool value)
+{
+}
+#endif
+
+static inline bool checkreqprot_get(void)
+{
+ /* non-zero/true checkreqprot values are no longer supported */
+ return 0;
+}
+
+static inline bool selinux_policycap_netpeer(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_NETPEER]);
+}
+
+static inline bool selinux_policycap_openperm(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_OPENPERM]);
+}
+
+static inline bool selinux_policycap_extsockclass(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_EXTSOCKCLASS]);
+}
+
+static inline bool selinux_policycap_alwaysnetwork(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_ALWAYSNETWORK]);
+}
+
+static inline bool selinux_policycap_cgroupseclabel(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_CGROUPSECLABEL]);
+}
+
+static inline bool selinux_policycap_nnp_nosuid_transition(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_NNP_NOSUID_TRANSITION]);
+}
+
+static inline bool selinux_policycap_genfs_seclabel_symlinks(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_GENFS_SECLABEL_SYMLINKS]);
+}
+
+static inline bool selinux_policycap_ioctl_skip_cloexec(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_IOCTL_SKIP_CLOEXEC]);
+}
+
+static inline bool selinux_policycap_userspace_initial_context(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_USERSPACE_INITIAL_CONTEXT]);
+}
+
+static inline bool selinux_policycap_netlink_xperm(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_NETLINK_XPERM]);
+}
+
+static inline bool selinux_policycap_functionfs_seclabel(void)
+{
+ return READ_ONCE(
+ selinux_state.policycap[POLICYDB_CAP_FUNCTIONFS_SECLABEL]);
+}
+
+static inline bool selinux_policycap_memfd_class(void)
+{
+ return READ_ONCE(selinux_state.policycap[POLICYDB_CAP_MEMFD_CLASS]);
+}
+
+struct selinux_policy_convert_data;
+struct selinux_load_state {
+ struct selinux_policy *policy;
+ struct selinux_policy_convert_data *convert_data;
+};
+
+int security_mls_enabled(void);
+int security_load_policy(void *data, size_t len,
+ struct selinux_load_state *load_state);
+void selinux_policy_commit(struct selinux_load_state *load_state);
+void selinux_policy_cancel(struct selinux_load_state *load_state);
+int security_read_policy(void **data, size_t *len);
+int security_read_state_kernel(void **data, size_t *len);
int security_policycap_supported(unsigned int req_cap);
#define SEL_VEC_MAX 32
@@ -102,14 +239,45 @@ struct av_decision {
u32 flags;
};
+#define XPERMS_ALLOWED 1
+#define XPERMS_AUDITALLOW 2
+#define XPERMS_DONTAUDIT 4
+
+#define security_xperm_set(perms, x) ((perms)[(x) >> 5] |= 1 << ((x)&0x1f))
+#define security_xperm_test(perms, x) (1 & ((perms)[(x) >> 5] >> ((x)&0x1f)))
+struct extended_perms_data {
+ u32 p[8];
+};
+
+struct extended_perms_decision {
+ u8 used;
+ u8 driver;
+ u8 base_perm;
+ struct extended_perms_data *allowed;
+ struct extended_perms_data *auditallow;
+ struct extended_perms_data *dontaudit;
+};
+
+struct extended_perms {
+ u16 len; /* length associated decision chain */
+ u8 base_perms; /* which base permissions are covered */
+ struct extended_perms_data drivers; /* flag drivers that are used */
+};
+
/* definitions of av_decision.flags */
-#define AVD_FLAGS_PERMISSIVE 0x0001
+#define AVD_FLAGS_PERMISSIVE 0x0001
+#define AVD_FLAGS_NEVERAUDIT 0x0002
+
+void security_compute_av(u32 ssid, u32 tsid, u16 tclass,
+ struct av_decision *avd,
+ struct extended_perms *xperms);
-void security_compute_av(u32 ssid, u32 tsid,
- u16 tclass, struct av_decision *avd);
+void security_compute_xperms_decision(u32 ssid, u32 tsid, u16 tclass, u8 driver,
+ u8 base_perm,
+ struct extended_perms_decision *xpermd);
-void security_compute_av_user(u32 ssid, u32 tsid,
- u16 tclass, struct av_decision *avd);
+void security_compute_av_user(u32 ssid, u32 tsid, u16 tclass,
+ struct av_decision *avd);
int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
const struct qstr *qstr, u32 *out_sid);
@@ -117,19 +285,20 @@ int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
const char *objname, u32 *out_sid);
-int security_member_sid(u32 ssid, u32 tsid,
- u16 tclass, u32 *out_sid);
+int security_member_sid(u32 ssid, u32 tsid, u16 tclass, u32 *out_sid);
-int security_change_sid(u32 ssid, u32 tsid,
- u16 tclass, u32 *out_sid);
+int security_change_sid(u32 ssid, u32 tsid, u16 tclass, u32 *out_sid);
-int security_sid_to_context(u32 sid, char **scontext,
- u32 *scontext_len);
+int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len);
int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len);
+int security_sid_to_context_inval(u32 sid, char **scontext, u32 *scontext_len);
+
int security_context_to_sid(const char *scontext, u32 scontext_len,
- u32 *out_sid);
+ u32 *out_sid, gfp_t gfp);
+
+int security_context_str_to_sid(const char *scontext, u32 *out_sid, gfp_t gfp);
int security_context_to_sid_default(const char *scontext, u32 scontext_len,
u32 *out_sid, u32 def_sid, gfp_t gfp_flags);
@@ -137,63 +306,69 @@ int security_context_to_sid_default(const char *scontext, u32 scontext_len,
int security_context_to_sid_force(const char *scontext, u32 scontext_len,
u32 *sid);
-int security_get_user_sids(u32 callsid, char *username,
- u32 **sids, u32 *nel);
+int security_get_user_sids(u32 fromsid, const char *username, u32 **sids, u32 *nel);
int security_port_sid(u8 protocol, u16 port, u32 *out_sid);
-int security_netif_sid(char *name, u32 *if_sid);
+int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid);
+
+int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid);
-int security_node_sid(u16 domain, void *addr, u32 addrlen,
- u32 *out_sid);
+int security_netif_sid(const char *name, u32 *if_sid);
+
+int security_node_sid(u16 domain, const void *addr, u32 addrlen, u32 *out_sid);
int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid,
u16 tclass);
-int security_bounded_transition(u32 oldsid, u32 newsid);
+int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid,
+ u16 tclass);
+
+int security_bounded_transition(u32 old_sid, u32 new_sid);
int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid);
-int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type,
- u32 xfrm_sid,
+int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, u32 xfrm_sid,
u32 *peer_sid);
-int security_get_classes(char ***classes, int *nclasses);
-int security_get_permissions(char *class, char ***perms, int *nperms);
+int security_get_classes(struct selinux_policy *policy, char ***classes,
+ u32 *nclasses);
+int security_get_permissions(struct selinux_policy *policy, const char *class,
+ char ***perms, u32 *nperms);
int security_get_reject_unknown(void);
int security_get_allow_unknown(void);
-#define SECURITY_FS_USE_XATTR 1 /* use xattr */
-#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
-#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
-#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
-#define SECURITY_FS_USE_NONE 5 /* no labeling support */
-#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
-#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
-#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
+#define SECURITY_FS_USE_XATTR 1 /* use xattr */
+#define SECURITY_FS_USE_TRANS 2 /* use transition SIDs, e.g. devpts/tmpfs */
+#define SECURITY_FS_USE_TASK 3 /* use task SIDs, e.g. pipefs/sockfs */
+#define SECURITY_FS_USE_GENFS 4 /* use the genfs support */
+#define SECURITY_FS_USE_NONE 5 /* no labeling support */
+#define SECURITY_FS_USE_MNTPOINT 6 /* use mountpoint labeling */
+#define SECURITY_FS_USE_NATIVE 7 /* use native label support */
+#define SECURITY_FS_USE_MAX 7 /* Highest SECURITY_FS_USE_XXX */
+
+int security_fs_use(struct super_block *sb);
-int security_fs_use(const char *fstype, unsigned int *behavior,
- u32 *sid);
+int security_genfs_sid(const char *fstype, const char *path, u16 sclass,
+ u32 *sid);
-int security_genfs_sid(const char *fstype, char *name, u16 sclass,
- u32 *sid);
+int selinux_policy_genfs_sid(struct selinux_policy *policy, const char *fstype,
+ const char *path, u16 sclass, u32 *sid);
#ifdef CONFIG_NETLABEL
int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr,
u32 *sid);
-int security_netlbl_sid_to_secattr(u32 sid,
- struct netlbl_lsm_secattr *secattr);
+int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr);
#else
-static inline int security_netlbl_secattr_to_sid(
- struct netlbl_lsm_secattr *secattr,
- u32 *sid)
+static inline int
+security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, u32 *sid)
{
return -EIDRM;
}
-static inline int security_netlbl_sid_to_secattr(u32 sid,
- struct netlbl_lsm_secattr *secattr)
+static inline int
+security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
{
return -ENOENT;
}
@@ -206,28 +381,29 @@ const char *security_get_initial_sid_context(u32 sid);
*/
extern struct page *selinux_kernel_status_page(void);
-#define SELINUX_KERNEL_STATUS_VERSION 1
+#define SELINUX_KERNEL_STATUS_VERSION 1
struct selinux_kernel_status {
- u32 version; /* version number of thie structure */
- u32 sequence; /* sequence number of seqlock logic */
- u32 enforcing; /* current setting of enforcing mode */
- u32 policyload; /* times of policy reloaded */
- u32 deny_unknown; /* current setting of deny_unknown */
+ u32 version; /* version number of the structure */
+ u32 sequence; /* sequence number of seqlock logic */
+ u32 enforcing; /* current setting of enforcing mode */
+ u32 policyload; /* times of policy reloaded */
+ u32 deny_unknown; /* current setting of deny_unknown */
/*
* The version > 0 supports above members.
*/
-} __attribute__((packed));
+} __packed;
-extern void selinux_status_update_setenforce(int enforcing);
-extern void selinux_status_update_policyload(int seqno);
+extern void selinux_status_update_setenforce(bool enforcing);
+extern void selinux_status_update_policyload(u32 seqno);
extern void selinux_complete_init(void);
-extern int selinux_disable(void);
-extern void exit_sel_fs(void);
extern struct path selinux_null;
-extern struct vfsmount *selinuxfs_mount;
extern void selnl_notify_setenforce(int val);
extern void selnl_notify_policyload(u32 seqno);
extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
-#endif /* _SELINUX_SECURITY_H_ */
+extern void avtab_cache_init(void);
+extern void ebitmap_cache_init(void);
+extern void hashtab_cache_init(void);
+extern int security_sidtab_hash_stats(char *page);
+#endif /* _SELINUX_SECURITY_H_ */
generated by cgit (git 2.34.1) at 2025-12-21 21:12:19 +0000