diff options
Diffstat (limited to 'security/selinux/include/avc.h')
| -rw-r--r-- | security/selinux/include/avc.h | 79 |
1 files changed, 32 insertions, 47 deletions
diff --git a/security/selinux/include/avc.h b/security/selinux/include/avc.h index 92d0ab561db8..01b5167fee1a 100644 --- a/security/selinux/include/avc.h +++ b/security/selinux/include/avc.h @@ -1,8 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Access vector cache interface for object managers. * - * Author : Stephen Smalley, <sds@epoch.ncsc.mil> + * Author : Stephen Smalley, <stephen.smalley.work@gmail.com> */ + #ifndef _SELINUX_AVC_H_ #define _SELINUX_AVC_H_ @@ -19,12 +21,6 @@ #include "av_permissions.h" #include "security.h" -#ifdef CONFIG_SECURITY_SELINUX_DEVELOP -extern int selinux_enforcing; -#else -#define selinux_enforcing 1 -#endif - /* * An entry in the AVC. */ @@ -57,7 +53,7 @@ struct selinux_audit_data { u32 audited; u32 denied; int result; -}; +} __randomize_layout; /* * AVC operations @@ -65,13 +61,14 @@ struct selinux_audit_data { void __init avc_init(void); -static inline u32 avc_audit_required(u32 requested, - struct av_decision *avd, - int result, - u32 auditdeny, - u32 *deniedp) +static inline u32 avc_audit_required(u32 requested, struct av_decision *avd, + int result, u32 auditdeny, u32 *deniedp) { u32 denied, audited; + + if (avd->flags & AVD_FLAGS_NEVERAUDIT) + return 0; + denied = requested & ~avd->allowed; if (unlikely(denied)) { audited = denied & avd->auditdeny; @@ -101,10 +98,8 @@ static inline u32 avc_audit_required(u32 requested, return audited; } -int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass, - u32 requested, u32 audited, u32 denied, - struct common_audit_data *a, - unsigned flags); +int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass, u32 requested, u32 audited, + u32 denied, int result, struct common_audit_data *a); /** * avc_audit - Audit the granting or denial of permissions. @@ -115,7 +110,6 @@ int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass, * @avd: access vector decisions * @result: result from avc_has_perm_noaudit * @a: auxiliary audit data - * @flags: VFS walk flags * * Audit the granting or denial of permissions in accordance * with the policy. This function is typically called by @@ -126,38 +120,31 @@ int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass, * be performed under a lock, to allow the lock to be released * before calling the auditing code. */ -static inline int avc_audit(u32 ssid, u32 tsid, - u16 tclass, u32 requested, - struct av_decision *avd, - int result, - struct common_audit_data *a, unsigned flags) +static inline int avc_audit(u32 ssid, u32 tsid, u16 tclass, u32 requested, + struct av_decision *avd, int result, + struct common_audit_data *a) { u32 audited, denied; audited = avc_audit_required(requested, avd, result, 0, &denied); if (likely(!audited)) return 0; - return slow_avc_audit(ssid, tsid, tclass, - requested, audited, denied, - a, flags); + return slow_avc_audit(ssid, tsid, tclass, requested, audited, denied, + result, a); } -#define AVC_STRICT 1 /* Ignore permissive mode. */ -int avc_has_perm_noaudit(u32 ssid, u32 tsid, - u16 tclass, u32 requested, - unsigned flags, - struct av_decision *avd); +#define AVC_STRICT 1 /* Ignore permissive mode. */ +#define AVC_EXTENDED_PERMS 2 /* update extended permissions */ +int avc_has_perm_noaudit(u32 ssid, u32 tsid, u16 tclass, u32 requested, + unsigned int flags, struct av_decision *avd); -int avc_has_perm_flags(u32 ssid, u32 tsid, - u16 tclass, u32 requested, - struct common_audit_data *auditdata, - unsigned); +int avc_has_perm(u32 ssid, u32 tsid, u16 tclass, u32 requested, + struct common_audit_data *auditdata); -static inline int avc_has_perm(u32 ssid, u32 tsid, - u16 tclass, u32 requested, - struct common_audit_data *auditdata) -{ - return avc_has_perm_flags(ssid, tsid, tclass, requested, auditdata, 0); -} +#define AVC_EXT_IOCTL (1 << 0) /* Cache entry for an ioctl extended permission */ +#define AVC_EXT_NLMSG (1 << 1) /* Cache entry for an nlmsg extended permission */ +int avc_has_extended_perms(u32 ssid, u32 tsid, u16 tclass, u32 requested, + u8 driver, u8 base_perm, u8 perm, + struct common_audit_data *ad); u32 avc_policy_seqno(void); @@ -166,22 +153,20 @@ u32 avc_policy_seqno(void); #define AVC_CALLBACK_REVOKE 4 #define AVC_CALLBACK_RESET 8 #define AVC_CALLBACK_AUDITALLOW_ENABLE 16 -#define AVC_CALLBACK_AUDITALLOW_DISABLE 32 +#define AVC_CALLBACK_AUDITALLOW_DISABLE 32 #define AVC_CALLBACK_AUDITDENY_ENABLE 64 #define AVC_CALLBACK_AUDITDENY_DISABLE 128 +#define AVC_CALLBACK_ADD_XPERMS 256 int avc_add_callback(int (*callback)(u32 event), u32 events); /* Exported to selinuxfs */ int avc_get_hash_stats(char *page); -extern unsigned int avc_cache_threshold; - -/* Attempt to free avc node cache */ -void avc_disable(void); +unsigned int avc_get_cache_threshold(void); +void avc_set_cache_threshold(unsigned int cache_threshold); #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS DECLARE_PER_CPU(struct avc_cache_stats, avc_cache_stats); #endif #endif /* _SELINUX_AVC_H_ */ - |