AppArmor: basic auditing infrastructure.
Update lsm_audit for AppArmor specific data, and add the core routines for AppArmor uses for auditing. Signed-off-by: John Johansen <john.johansen@canonical.com> Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
John Johansen
James Morris
parent
cdff264264
commit
67012e8209
@ -98,6 +98,33 @@ struct common_audit_data {
|
||||
struct av_decision *avd;
|
||||
int result;
|
||||
} selinux_audit_data;
|
||||
#endif
|
||||
#ifdef CONFIG_SECURITY_APPARMOR
|
||||
struct {
|
||||
int error;
|
||||
int op;
|
||||
int type;
|
||||
void *profile;
|
||||
const char *name;
|
||||
const char *info;
|
||||
union {
|
||||
void *target;
|
||||
struct {
|
||||
long pos;
|
||||
void *target;
|
||||
} iface;
|
||||
struct {
|
||||
int rlim;
|
||||
unsigned long max;
|
||||
} rlim;
|
||||
struct {
|
||||
const char *target;
|
||||
u32 request;
|
||||
u32 denied;
|
||||
uid_t ouid;
|
||||
} fs;
|
||||
};
|
||||
} apparmor_audit_data;
|
||||
#endif
|
||||
};
|
||||
/* these callback will be implemented by a specific LSM */
|
||||
|
||||
215
security/apparmor/audit.c
Normal file
215
security/apparmor/audit.c
Normal file
@ -0,0 +1,215 @@
|
||||
/*
|
||||
* 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"
|
||||
|
||||
const char *op_table[] = {
|
||||
"null",
|
||||
|
||||
"sysctl",
|
||||
"capable",
|
||||
|
||||
"unlink",
|
||||
"mkdir",
|
||||
"rmdir",
|
||||
"mknod",
|
||||
"truncate",
|
||||
"link",
|
||||
"symlink",
|
||||
"rename_src",
|
||||
"rename_dest",
|
||||
"chmod",
|
||||
"chown",
|
||||
"getattr",
|
||||
"open",
|
||||
|
||||
"file_perm",
|
||||
"file_lock",
|
||||
"file_mmap",
|
||||
"file_mprotect",
|
||||
|
||||
"create",
|
||||
"post_create",
|
||||
"bind",
|
||||
"connect",
|
||||
"listen",
|
||||
"accept",
|
||||
"sendmsg",
|
||||
"recvmsg",
|
||||
"getsockname",
|
||||
"getpeername",
|
||||
"getsockopt",
|
||||
"setsockopt",
|
||||
"socket_shutdown",
|
||||
|
||||
"ptrace",
|
||||
|
||||
"exec",
|
||||
"change_hat",
|
||||
"change_profile",
|
||||
"change_onexec",
|
||||
|
||||
"setprocattr",
|
||||
"setrlimit",
|
||||
|
||||
"profile_replace",
|
||||
"profile_load",
|
||||
"profile_remove"
|
||||
};
|
||||
|
||||
const char *audit_mode_names[] = {
|
||||
"normal",
|
||||
"quiet_denied",
|
||||
"quiet",
|
||||
"noquiet",
|
||||
"all"
|
||||
};
|
||||
|
||||
static char *aa_audit_type[] = {
|
||||
"AUDIT",
|
||||
"ALLOWED",
|
||||
"DENIED",
|
||||
"HINT",
|
||||
"STATUS",
|
||||
"ERROR",
|
||||
"KILLED"
|
||||
};
|
||||
|
||||
/*
|
||||
* 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;
|
||||
struct task_struct *tsk = sa->tsk ? sa->tsk : current;
|
||||
|
||||
if (aa_g_audit_header) {
|
||||
audit_log_format(ab, "apparmor=");
|
||||
audit_log_string(ab, aa_audit_type[sa->aad.type]);
|
||||
}
|
||||
|
||||
if (sa->aad.op) {
|
||||
audit_log_format(ab, " operation=");
|
||||
audit_log_string(ab, op_table[sa->aad.op]);
|
||||
}
|
||||
|
||||
if (sa->aad.info) {
|
||||
audit_log_format(ab, " info=");
|
||||
audit_log_string(ab, sa->aad.info);
|
||||
if (sa->aad.error)
|
||||
audit_log_format(ab, " error=%d", sa->aad.error);
|
||||
}
|
||||
|
||||
if (sa->aad.profile) {
|
||||
struct aa_profile *profile = sa->aad.profile;
|
||||
pid_t pid;
|
||||
rcu_read_lock();
|
||||
pid = tsk->real_parent->pid;
|
||||
rcu_read_unlock();
|
||||
audit_log_format(ab, " parent=%d", pid);
|
||||
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);
|
||||
}
|
||||
|
||||
if (sa->aad.name) {
|
||||
audit_log_format(ab, " name=");
|
||||
audit_log_untrustedstring(ab, sa->aad.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 *))
|
||||
{
|
||||
sa->aad.type = type;
|
||||
sa->lsm_pre_audit = audit_pre;
|
||||
sa->lsm_post_audit = cb;
|
||||
common_lsm_audit(sa);
|
||||
}
|
||||
|
||||
/**
|
||||
* 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->tsk ? sa->tsk : current);
|
||||
|
||||
if (sa->aad.type == AUDIT_APPARMOR_ALLOWED)
|
||||
return complain_error(sa->aad.error);
|
||||
|
||||
return sa->aad.error;
|
||||
}
|
||||
123
security/apparmor/include/audit.h
Normal file
123
security/apparmor/include/audit.h
Normal file
@ -0,0 +1,123 @@
|
||||
/*
|
||||
* AppArmor security module
|
||||
*
|
||||
* This file contains AppArmor auditing function definitions.
|
||||
*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef __AA_AUDIT_H
|
||||
#define __AA_AUDIT_H
|
||||
|
||||
#include <linux/audit.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/lsm_audit.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/slab.h>
|
||||
|
||||
#include "file.h"
|
||||
|
||||
struct aa_profile;
|
||||
|
||||
extern const char *audit_mode_names[];
|
||||
#define AUDIT_MAX_INDEX 5
|
||||
|
||||
#define AUDIT_APPARMOR_AUTO 0 /* auto choose audit message type */
|
||||
|
||||
enum audit_mode {
|
||||
AUDIT_NORMAL, /* follow normal auditing of accesses */
|
||||
AUDIT_QUIET_DENIED, /* quiet all denied access messages */
|
||||
AUDIT_QUIET, /* quiet all messages */
|
||||
AUDIT_NOQUIET, /* do not quiet audit messages */
|
||||
AUDIT_ALL /* audit all accesses */
|
||||
};
|
||||
|
||||
enum audit_type {
|
||||
AUDIT_APPARMOR_AUDIT,
|
||||
AUDIT_APPARMOR_ALLOWED,
|
||||
AUDIT_APPARMOR_DENIED,
|
||||
AUDIT_APPARMOR_HINT,
|
||||
AUDIT_APPARMOR_STATUS,
|
||||
AUDIT_APPARMOR_ERROR,
|
||||
AUDIT_APPARMOR_KILL
|
||||
};
|
||||
|
||||
extern const char *op_table[];
|
||||
enum aa_ops {
|
||||
OP_NULL,
|
||||
|
||||
OP_SYSCTL,
|
||||
OP_CAPABLE,
|
||||
|
||||
OP_UNLINK,
|
||||
OP_MKDIR,
|
||||
OP_RMDIR,
|
||||
OP_MKNOD,
|
||||
OP_TRUNC,
|
||||
OP_LINK,
|
||||
OP_SYMLINK,
|
||||
OP_RENAME_SRC,
|
||||
OP_RENAME_DEST,
|
||||
OP_CHMOD,
|
||||
OP_CHOWN,
|
||||
OP_GETATTR,
|
||||
OP_OPEN,
|
||||
|
||||
OP_FPERM,
|
||||
OP_FLOCK,
|
||||
OP_FMMAP,
|
||||
OP_FMPROT,
|
||||
|
||||
OP_CREATE,
|
||||
OP_POST_CREATE,
|
||||
OP_BIND,
|
||||
OP_CONNECT,
|
||||
OP_LISTEN,
|
||||
OP_ACCEPT,
|
||||
OP_SENDMSG,
|
||||
OP_RECVMSG,
|
||||
OP_GETSOCKNAME,
|
||||
OP_GETPEERNAME,
|
||||
OP_GETSOCKOPT,
|
||||
OP_SETSOCKOPT,
|
||||
OP_SOCK_SHUTDOWN,
|
||||
|
||||
OP_PTRACE,
|
||||
|
||||
OP_EXEC,
|
||||
OP_CHANGE_HAT,
|
||||
OP_CHANGE_PROFILE,
|
||||
OP_CHANGE_ONEXEC,
|
||||
|
||||
OP_SETPROCATTR,
|
||||
OP_SETRLIMIT,
|
||||
|
||||
OP_PROF_REPL,
|
||||
OP_PROF_LOAD,
|
||||
OP_PROF_RM,
|
||||
};
|
||||
|
||||
|
||||
/* define a short hand for apparmor_audit_data portion of common_audit_data */
|
||||
#define aad apparmor_audit_data
|
||||
|
||||
void aa_audit_msg(int type, struct common_audit_data *sa,
|
||||
void (*cb) (struct audit_buffer *, void *));
|
||||
int aa_audit(int type, struct aa_profile *profile, gfp_t gfp,
|
||||
struct common_audit_data *sa,
|
||||
void (*cb) (struct audit_buffer *, void *));
|
||||
|
||||
static inline int complain_error(int error)
|
||||
{
|
||||
if (error == -EPERM || error == -EACCES)
|
||||
return 0;
|
||||
return error;
|
||||
}
|
||||
|
||||
#endif /* __AA_AUDIT_H */
|
||||
Loading…
Reference in New Issue
Block a user