166 строки
4.0 KiB
C
166 строки
4.0 KiB
C
/*
|
|
* AppArmor security module
|
|
*
|
|
* This file contains AppArmor auditing functions
|
|
*
|
|
* Copyright (C) 1998-2008 Novell/SUSE
|
|
* Copyright 2009-2010 Canonical Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation, version 2 of the
|
|
* License.
|
|
*/
|
|
|
|
#include <linux/audit.h>
|
|
#include <linux/socket.h>
|
|
|
|
#include "include/apparmor.h"
|
|
#include "include/audit.h"
|
|
#include "include/policy.h"
|
|
#include "include/policy_ns.h"
|
|
|
|
|
|
const char *const audit_mode_names[] = {
|
|
"normal",
|
|
"quiet_denied",
|
|
"quiet",
|
|
"noquiet",
|
|
"all"
|
|
};
|
|
|
|
static const char *const aa_audit_type[] = {
|
|
"AUDIT",
|
|
"ALLOWED",
|
|
"DENIED",
|
|
"HINT",
|
|
"STATUS",
|
|
"ERROR",
|
|
"KILLED",
|
|
"AUTO"
|
|
};
|
|
|
|
/*
|
|
* Currently AppArmor auditing is fed straight into the audit framework.
|
|
*
|
|
* TODO:
|
|
* netlink interface for complain mode
|
|
* user auditing, - send user auditing to netlink interface
|
|
* system control of whether user audit messages go to system log
|
|
*/
|
|
|
|
/**
|
|
* audit_base - core AppArmor function.
|
|
* @ab: audit buffer to fill (NOT NULL)
|
|
* @ca: audit structure containing data to audit (NOT NULL)
|
|
*
|
|
* Record common AppArmor audit data from @sa
|
|
*/
|
|
static void audit_pre(struct audit_buffer *ab, void *ca)
|
|
{
|
|
struct common_audit_data *sa = ca;
|
|
|
|
if (aa_g_audit_header) {
|
|
audit_log_format(ab, "apparmor=");
|
|
audit_log_string(ab, aa_audit_type[aad(sa)->type]);
|
|
}
|
|
|
|
if (aad(sa)->op) {
|
|
audit_log_format(ab, " operation=");
|
|
audit_log_string(ab, aad(sa)->op);
|
|
}
|
|
|
|
if (aad(sa)->info) {
|
|
audit_log_format(ab, " info=");
|
|
audit_log_string(ab, aad(sa)->info);
|
|
if (aad(sa)->error)
|
|
audit_log_format(ab, " error=%d", aad(sa)->error);
|
|
}
|
|
|
|
if (aad(sa)->label) {
|
|
struct aa_label *label = aad(sa)->label;
|
|
|
|
if (label_isprofile(label)) {
|
|
struct aa_profile *profile = labels_profile(label);
|
|
|
|
if (profile->ns != root_ns) {
|
|
audit_log_format(ab, " namespace=");
|
|
audit_log_untrustedstring(ab,
|
|
profile->ns->base.hname);
|
|
}
|
|
audit_log_format(ab, " profile=");
|
|
audit_log_untrustedstring(ab, profile->base.hname);
|
|
} else {
|
|
audit_log_format(ab, " label=");
|
|
aa_label_xaudit(ab, root_ns, label, FLAG_VIEW_SUBNS,
|
|
GFP_ATOMIC);
|
|
}
|
|
}
|
|
|
|
if (aad(sa)->name) {
|
|
audit_log_format(ab, " name=");
|
|
audit_log_untrustedstring(ab, aad(sa)->name);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* aa_audit_msg - Log a message to the audit subsystem
|
|
* @sa: audit event structure (NOT NULL)
|
|
* @cb: optional callback fn for type specific fields (MAYBE NULL)
|
|
*/
|
|
void aa_audit_msg(int type, struct common_audit_data *sa,
|
|
void (*cb) (struct audit_buffer *, void *))
|
|
{
|
|
aad(sa)->type = type;
|
|
common_lsm_audit(sa, audit_pre, 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)
|
|
* @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 *))
|
|
{
|
|
AA_BUG(!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;
|
|
}
|