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-rw-r--r--security/selinux/avc.c130
1 files changed, 24 insertions, 106 deletions
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 8ee42b2a5f19..68d82daed257 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -65,14 +65,8 @@ struct avc_cache {
};
struct avc_callback_node {
- int (*callback) (u32 event, u32 ssid, u32 tsid,
- u16 tclass, u32 perms,
- u32 *out_retained);
+ int (*callback) (u32 event);
u32 events;
- u32 ssid;
- u32 tsid;
- u16 tclass;
- u32 perms;
struct avc_callback_node *next;
};
@@ -436,9 +430,9 @@ static void avc_audit_pre_callback(struct audit_buffer *ab, void *a)
{
struct common_audit_data *ad = a;
audit_log_format(ab, "avc: %s ",
- ad->selinux_audit_data->slad->denied ? "denied" : "granted");
- avc_dump_av(ab, ad->selinux_audit_data->slad->tclass,
- ad->selinux_audit_data->slad->audited);
+ ad->selinux_audit_data->denied ? "denied" : "granted");
+ avc_dump_av(ab, ad->selinux_audit_data->tclass,
+ ad->selinux_audit_data->audited);
audit_log_format(ab, " for ");
}
@@ -452,25 +446,23 @@ static void avc_audit_post_callback(struct audit_buffer *ab, void *a)
{
struct common_audit_data *ad = a;
audit_log_format(ab, " ");
- avc_dump_query(ab, ad->selinux_audit_data->slad->ssid,
- ad->selinux_audit_data->slad->tsid,
- ad->selinux_audit_data->slad->tclass);
+ avc_dump_query(ab, ad->selinux_audit_data->ssid,
+ ad->selinux_audit_data->tsid,
+ ad->selinux_audit_data->tclass);
}
/* This is the slow part of avc audit with big stack footprint */
-static noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
+noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
u32 requested, u32 audited, u32 denied,
struct common_audit_data *a,
unsigned flags)
{
struct common_audit_data stack_data;
- struct selinux_audit_data sad = {0,};
- struct selinux_late_audit_data slad;
+ struct selinux_audit_data sad;
if (!a) {
a = &stack_data;
- COMMON_AUDIT_DATA_INIT(a, NONE);
- a->selinux_audit_data = &sad;
+ a->type = LSM_AUDIT_DATA_NONE;
}
/*
@@ -484,104 +476,34 @@ static noinline int slow_avc_audit(u32 ssid, u32 tsid, u16 tclass,
(flags & MAY_NOT_BLOCK))
return -ECHILD;
- slad.tclass = tclass;
- slad.requested = requested;
- slad.ssid = ssid;
- slad.tsid = tsid;
- slad.audited = audited;
- slad.denied = denied;
+ sad.tclass = tclass;
+ sad.requested = requested;
+ sad.ssid = ssid;
+ sad.tsid = tsid;
+ sad.audited = audited;
+ sad.denied = denied;
+
+ a->selinux_audit_data = &sad;
- a->selinux_audit_data->slad = &slad;
common_lsm_audit(a, avc_audit_pre_callback, avc_audit_post_callback);
return 0;
}
/**
- * avc_audit - Audit the granting or denial of permissions.
- * @ssid: source security identifier
- * @tsid: target security identifier
- * @tclass: target security class
- * @requested: requested permissions
- * @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
- * avc_has_perm() after a permission check, but can also be
- * called directly by callers who use avc_has_perm_noaudit()
- * in order to separate the permission check from the auditing.
- * For example, this separation is useful when the permission check must
- * be performed under a lock, to allow the lock to be released
- * before calling the auditing code.
- */
-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)
-{
- u32 denied, audited;
- denied = requested & ~avd->allowed;
- if (unlikely(denied)) {
- audited = denied & avd->auditdeny;
- /*
- * a->selinux_audit_data->auditdeny is TRICKY! Setting a bit in
- * this field means that ANY denials should NOT be audited if
- * the policy contains an explicit dontaudit rule for that
- * permission. Take notice that this is unrelated to the
- * actual permissions that were denied. As an example lets
- * assume:
- *
- * denied == READ
- * avd.auditdeny & ACCESS == 0 (not set means explicit rule)
- * selinux_audit_data->auditdeny & ACCESS == 1
- *
- * We will NOT audit the denial even though the denied
- * permission was READ and the auditdeny checks were for
- * ACCESS
- */
- if (a &&
- a->selinux_audit_data->auditdeny &&
- !(a->selinux_audit_data->auditdeny & avd->auditdeny))
- audited = 0;
- } else if (result)
- audited = denied = requested;
- else
- audited = requested & avd->auditallow;
- if (likely(!audited))
- return 0;
-
- return slow_avc_audit(ssid, tsid, tclass,
- requested, audited, denied,
- a, flags);
-}
-
-/**
* avc_add_callback - Register a callback for security events.
* @callback: callback function
* @events: security events
- * @ssid: source security identifier or %SECSID_WILD
- * @tsid: target security identifier or %SECSID_WILD
- * @tclass: target security class
- * @perms: permissions
*
- * Register a callback function for events in the set @events
- * related to the SID pair (@ssid, @tsid)
- * and the permissions @perms, interpreting
- * @perms based on @tclass. Returns %0 on success or
- * -%ENOMEM if insufficient memory exists to add the callback.
+ * Register a callback function for events in the set @events.
+ * Returns %0 on success or -%ENOMEM if insufficient memory
+ * exists to add the callback.
*/
-int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
- u16 tclass, u32 perms,
- u32 *out_retained),
- u32 events, u32 ssid, u32 tsid,
- u16 tclass, u32 perms)
+int __init avc_add_callback(int (*callback)(u32 event), u32 events)
{
struct avc_callback_node *c;
int rc = 0;
- c = kmalloc(sizeof(*c), GFP_ATOMIC);
+ c = kmalloc(sizeof(*c), GFP_KERNEL);
if (!c) {
rc = -ENOMEM;
goto out;
@@ -589,9 +511,6 @@ int avc_add_callback(int (*callback)(u32 event, u32 ssid, u32 tsid,
c->callback = callback;
c->events = events;
- c->ssid = ssid;
- c->tsid = tsid;
- c->perms = perms;
c->next = avc_callbacks;
avc_callbacks = c;
out:
@@ -731,8 +650,7 @@ int avc_ss_reset(u32 seqno)
for (c = avc_callbacks; c; c = c->next) {
if (c->events & AVC_CALLBACK_RESET) {
- tmprc = c->callback(AVC_CALLBACK_RESET,
- 0, 0, 0, 0, NULL);
+ tmprc = c->callback(AVC_CALLBACK_RESET);
/* save the first error encountered for the return
value and continue processing the callbacks */
if (!rc)