/**
* aa_apply_modes_to_perms - apply namespace and profile flags to perms
* @profile: that perms where computed from
* @perms: perms to apply mode modifiers to
*
* TODO: split into profile and ns based flags for when accumulating perms
*/
void aa_apply_modes_to_perms(struct aa_profile *profile, struct aa_perms *perms)
{
switch (AUDIT_MODE(profile)) {
case AUDIT_ALL:
perms->audit = ALL_PERMS_MASK;
/* fall through */
case AUDIT_NOQUIET:
perms->quiet = 0;
break;
case AUDIT_QUIET:
perms->audit = 0;
/* fall through */
case AUDIT_QUIET_DENIED:
perms->quiet = ALL_PERMS_MASK;
break;
}
if (KILL_MODE(profile))
perms->kill = ALL_PERMS_MASK;
else if (COMPLAIN_MODE(profile))
perms->complain = ALL_PERMS_MASK;
/* TODO:
else if (PROMPT_MODE(profile))
perms->prompt = ALL_PERMS_MASK;
*/
}
/**
* audit_caps - audit a capability
* @profile: profile confining task (NOT NULL)
* @task: task capability test was performed against (NOT NULL)
* @cap: capability tested
* @error: error code returned by test
*
* Do auditing of capability and handle, audit/complain/kill modes switching
* and duplicate message elimination.
*
* Returns: 0 or sa->error on success, error code on failure
*/
static int audit_caps(struct aa_profile *profile, struct task_struct *task,
int cap, int error)
{
struct audit_cache *ent;
int type = AUDIT_APPARMOR_AUTO;
struct common_audit_data sa;
struct apparmor_audit_data aad = {0,};
COMMON_AUDIT_DATA_INIT(&sa, CAP);
sa.aad = &aad;
sa.tsk = task;
sa.u.cap = cap;
sa.aad->op = OP_CAPABLE;
sa.aad->error = error;
if (likely(!error)) {
/* test if auditing is being forced */
if (likely((AUDIT_MODE(profile) != AUDIT_ALL) &&
!cap_raised(profile->caps.audit, cap)))
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (KILL_MODE(profile) ||
cap_raised(profile->caps.kill, cap)) {
type = AUDIT_APPARMOR_KILL;
} else if (cap_raised(profile->caps.quiet, cap) &&
AUDIT_MODE(profile) != AUDIT_NOQUIET &&
AUDIT_MODE(profile) != AUDIT_ALL) {
/* quiet auditing */
return error;
}
/* Do simple duplicate message elimination */
ent = &get_cpu_var(audit_cache);
if (profile == ent->profile && cap_raised(ent->caps, cap)) {
put_cpu_var(audit_cache);
if (COMPLAIN_MODE(profile))
return complain_error(error);
return error;
} else {
aa_put_profile(ent->profile);
ent->profile = aa_get_profile(profile);
cap_raise(ent->caps, cap);
}
put_cpu_var(audit_cache);
return aa_audit(type, profile, GFP_ATOMIC, &sa, audit_cb);
}
/**
* audit_caps - audit a capability
* @sa: audit data
* @profile: profile being tested for confinement (NOT NULL)
* @cap: capability tested
* @error: error code returned by test
*
* Do auditing of capability and handle, audit/complain/kill modes switching
* and duplicate message elimination.
*
* Returns: 0 or sa->error on success, error code on failure
*/
static int audit_caps(struct common_audit_data *sa, struct aa_profile *profile,
int cap, int error)
{
struct audit_cache *ent;
int type = AUDIT_APPARMOR_AUTO;
aad(sa)->error = error;
if (likely(!error)) {
/* test if auditing is being forced */
if (likely((AUDIT_MODE(profile) != AUDIT_ALL) &&
!cap_raised(profile->caps.audit, cap)))
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (KILL_MODE(profile) ||
cap_raised(profile->caps.kill, cap)) {
type = AUDIT_APPARMOR_KILL;
} else if (cap_raised(profile->caps.quiet, cap) &&
AUDIT_MODE(profile) != AUDIT_NOQUIET &&
AUDIT_MODE(profile) != AUDIT_ALL) {
/* quiet auditing */
return error;
}
/* Do simple duplicate message elimination */
ent = &get_cpu_var(audit_cache);
if (profile == ent->profile && cap_raised(ent->caps, cap)) {
put_cpu_var(audit_cache);
if (COMPLAIN_MODE(profile))
return complain_error(error);
return error;
} else {
aa_put_profile(ent->profile);
ent->profile = aa_get_profile(profile);
cap_raise(ent->caps, cap);
}
put_cpu_var(audit_cache);
return aa_audit(type, profile, sa, audit_cb);
}
/**
* aa_audit - Log a profile based audit event to the audit subsystem
* @type: audit type for the message
* @profile: profile to check against (NOT NULL)
* @gfp: allocation flags to use
* @sa: audit event (NOT NULL)
* @cb: optional callback fn for type specific fields (MAYBE NULL)
*
* Handle default message switching based off of audit mode flags
*
* Returns: error on failure
*/
int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
struct common_audit_data *sa,
void (*cb) (struct audit_buffer *, void *))
{
BUG_ON(!profile);
if (type == AUDIT_APPARMOR_AUTO) {
if (likely(!sa->aad->error)) {
if (AUDIT_MODE(profile) != AUDIT_ALL)
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (COMPLAIN_MODE(profile))
type = AUDIT_APPARMOR_ALLOWED;
else
type = AUDIT_APPARMOR_DENIED;
}
if (AUDIT_MODE(profile) == AUDIT_QUIET ||
(type == AUDIT_APPARMOR_DENIED &&
AUDIT_MODE(profile) == AUDIT_QUIET))
return sa->aad->error;
if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
type = AUDIT_APPARMOR_KILL;
if (!unconfined(profile))
sa->aad->profile = profile;
aa_audit_msg(type, sa, cb);
if (sa->aad->type == AUDIT_APPARMOR_KILL)
(void)send_sig_info(SIGKILL, NULL,
sa->u.tsk ? sa->u.tsk : current);
if (sa->aad->type == AUDIT_APPARMOR_ALLOWED)
return complain_error(sa->aad->error);
return sa->aad->error;
}
/**
* aa_audit - Log a profile based audit event to the audit subsystem
* @type: audit type for the message
* @profile: profile to check against (NOT NULL)
* @sa: audit event (NOT NULL)
* @cb: optional callback fn for type specific fields (MAYBE NULL)
*
* Handle default message switching based off of audit mode flags
*
* Returns: error on failure
*/
int aa_audit(int type, struct aa_profile *profile, struct common_audit_data *sa,
void (*cb) (struct audit_buffer *, void *))
{
BUG_ON(!profile);
if (type == AUDIT_APPARMOR_AUTO) {
if (likely(!aad(sa)->error)) {
if (AUDIT_MODE(profile) != AUDIT_ALL)
return 0;
type = AUDIT_APPARMOR_AUDIT;
} else if (COMPLAIN_MODE(profile))
type = AUDIT_APPARMOR_ALLOWED;
else
type = AUDIT_APPARMOR_DENIED;
}
if (AUDIT_MODE(profile) == AUDIT_QUIET ||
(type == AUDIT_APPARMOR_DENIED &&
AUDIT_MODE(profile) == AUDIT_QUIET))
return aad(sa)->error;
if (KILL_MODE(profile) && type == AUDIT_APPARMOR_DENIED)
type = AUDIT_APPARMOR_KILL;
aad(sa)->label = &profile->label;
aa_audit_msg(type, sa, cb);
if (aad(sa)->type == AUDIT_APPARMOR_KILL)
(void)send_sig_info(SIGKILL, NULL,
sa->type == LSM_AUDIT_DATA_TASK && sa->u.tsk ?
sa->u.tsk : current);
if (aad(sa)->type == AUDIT_APPARMOR_ALLOWED)
return complain_error(aad(sa)->error);
return aad(sa)->error;
}
