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TOMOYO: Add auditing interface.

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Add /sys/kernel/security/tomoyo/audit interface. This interface generates audit
logs in the form of domain policy so that /usr/sbin/tomoyo-auditd can reuse
audit logs for appending to /sys/kernel/security/tomoyo/domain_policy
interface.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa 2011-06-26 23:18:58 +09:00 committed by James Morris
parent d5ca1725ac
commit eadd99cc85
9 changed files with 557 additions and 235 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
security/tomoyo/Makefile
View File

@ -1 +1 @@
obj-y = common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o
obj-y = audit.o common.o domain.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o

300
security/tomoyo/audit.c Normal file
View File

@ -0,0 +1,300 @@
/*
* security/tomoyo/audit.c
*
* Pathname restriction functions.
*
* Copyright (C) 2005-2010 NTT DATA CORPORATION
*/
#include "common.h"
#include <linux/slab.h>
/**
* tomoyo_convert_time - Convert time_t to YYYY/MM/DD hh/mm/ss.
*
* @time: Seconds since 1970/01/01 00:00:00.
* @stamp: Pointer to "struct tomoyo_time".
*
* Returns nothing.
*
* This function does not handle Y2038 problem.
*/
static void tomoyo_convert_time(time_t time, struct tomoyo_time *stamp)
{
static const u16 tomoyo_eom[2][12] = {
{ 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
{ 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
u16 y;
u8 m;
bool r;
stamp->sec = time % 60;
time /= 60;
stamp->min = time % 60;
time /= 60;
stamp->hour = time % 24;
time /= 24;
for (y = 1970; ; y++) {
const unsigned short days = (y & 3) ? 365 : 366;
if (time < days)
break;
time -= days;
}
r = (y & 3) == 0;
for (m = 0; m < 11 && time >= tomoyo_eom[r][m]; m++)
;
if (m)
time -= tomoyo_eom[r][m - 1];
stamp->year = y;
stamp->month = ++m;
stamp->day = ++time;
}
/**
* tomoyo_print_header - Get header line of audit log.
*
* @r: Pointer to "struct tomoyo_request_info".
*
* Returns string representation.
*
* This function uses kmalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
static char *tomoyo_print_header(struct tomoyo_request_info *r)
{
struct tomoyo_time stamp;
const pid_t gpid = task_pid_nr(current);
static const int tomoyo_buffer_len = 4096;
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
pid_t ppid;
if (!buffer)
return NULL;
{
struct timeval tv;
do_gettimeofday(&tv);
tomoyo_convert_time(tv.tv_sec, &stamp);
}
rcu_read_lock();
ppid = task_tgid_vnr(current->real_parent);
rcu_read_unlock();
snprintf(buffer, tomoyo_buffer_len - 1,
"#%04u/%02u/%02u %02u:%02u:%02u# profile=%u mode=%s "
"granted=%s (global-pid=%u) task={ pid=%u ppid=%u "
"uid=%u gid=%u euid=%u egid=%u suid=%u sgid=%u "
"fsuid=%u fsgid=%u }",
stamp.year, stamp.month, stamp.day, stamp.hour,
stamp.min, stamp.sec, r->profile, tomoyo_mode[r->mode],
tomoyo_yesno(r->granted), gpid, task_tgid_vnr(current), ppid,
current_uid(), current_gid(), current_euid(), current_egid(),
current_suid(), current_sgid(), current_fsuid(),
current_fsgid());
return buffer;
}
/**
* tomoyo_init_log - Allocate buffer for audit logs.
*
* @r: Pointer to "struct tomoyo_request_info".
* @len: Buffer size needed for @fmt and @args.
* @fmt: The printf()'s format string.
* @args: va_list structure for @fmt.
*
* Returns pointer to allocated memory.
*
* This function uses kzalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
va_list args)
{
char *buf = NULL;
const char *header = NULL;
int pos;
const char *domainname = tomoyo_domain()->domainname->name;
header = tomoyo_print_header(r);
if (!header)
return NULL;
/* +10 is for '\n' etc. and '\0'. */
len += strlen(domainname) + strlen(header) + 10;
len = tomoyo_round2(len);
buf = kzalloc(len, GFP_NOFS);
if (!buf)
goto out;
len--;
pos = snprintf(buf, len, "%s", header);
pos += snprintf(buf + pos, len - pos, "\n%s\n", domainname);
vsnprintf(buf + pos, len - pos, fmt, args);
out:
kfree(header);
return buf;
}
/* Wait queue for /sys/kernel/security/tomoyo/audit. */
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_log_wait);
/* Structure for audit log. */
struct tomoyo_log {
struct list_head list;
char *log;
int size;
};
/* The list for "struct tomoyo_log". */
static LIST_HEAD(tomoyo_log);
/* Lock for "struct list_head tomoyo_log". */
static DEFINE_SPINLOCK(tomoyo_log_lock);
/* Length of "stuct list_head tomoyo_log". */
static unsigned int tomoyo_log_count;
/**
* tomoyo_get_audit - Get audit mode.
*
* @profile: Profile number.
* @index: Index number of functionality.
* @is_granted: True if granted log, false otherwise.
*
* Returns true if this request should be audited, false otherwise.
*/
static bool tomoyo_get_audit(const u8 profile, const u8 index,
const bool is_granted)
{
u8 mode;
const u8 category = TOMOYO_MAC_CATEGORY_FILE + TOMOYO_MAX_MAC_INDEX;
struct tomoyo_profile *p;
if (!tomoyo_policy_loaded)
return false;
p = tomoyo_profile(profile);
if (tomoyo_log_count >= p->pref[TOMOYO_PREF_MAX_AUDIT_LOG])
return false;
mode = p->config[index];
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
mode = p->config[category];
if (mode == TOMOYO_CONFIG_USE_DEFAULT)
mode = p->default_config;
if (is_granted)
return mode & TOMOYO_CONFIG_WANT_GRANT_LOG;
return mode & TOMOYO_CONFIG_WANT_REJECT_LOG;
}
/**
* tomoyo_write_log2 - Write an audit log.
*
* @r: Pointer to "struct tomoyo_request_info".
* @len: Buffer size needed for @fmt and @args.
* @fmt: The printf()'s format string.
* @args: va_list structure for @fmt.
*
* Returns nothing.
*/
void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
va_list args)
{
char *buf;
struct tomoyo_log *entry;
bool quota_exceeded = false;
if (!tomoyo_get_audit(r->profile, r->type, r->granted))
goto out;
buf = tomoyo_init_log(r, len, fmt, args);
if (!buf)
goto out;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
if (!entry) {
kfree(buf);
goto out;
}
entry->log = buf;
len = tomoyo_round2(strlen(buf) + 1);
/*
* The entry->size is used for memory quota checks.
* Don't go beyond strlen(entry->log).
*/
entry->size = len + tomoyo_round2(sizeof(*entry));
spin_lock(&tomoyo_log_lock);
if (tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT] &&
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] + entry->size >=
tomoyo_memory_quota[TOMOYO_MEMORY_AUDIT]) {
quota_exceeded = true;
} else {
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] += entry->size;
list_add_tail(&entry->list, &tomoyo_log);
tomoyo_log_count++;
}
spin_unlock(&tomoyo_log_lock);
if (quota_exceeded) {
kfree(buf);
kfree(entry);
goto out;
}
wake_up(&tomoyo_log_wait);
out:
return;
}
/**
* tomoyo_write_log - Write an audit log.
*
* @r: Pointer to "struct tomoyo_request_info".
* @fmt: The printf()'s format string, followed by parameters.
*
* Returns nothing.
*/
void tomoyo_write_log(struct tomoyo_request_info *r, const char *fmt, ...)
{
va_list args;
int len;
va_start(args, fmt);
len = vsnprintf((char *) &len, 1, fmt, args) + 1;
va_end(args);
va_start(args, fmt);
tomoyo_write_log2(r, len, fmt, args);
va_end(args);
}
/**
* tomoyo_read_log - Read an audit log.
*
* @head: Pointer to "struct tomoyo_io_buffer".
*
* Returns nothing.
*/
void tomoyo_read_log(struct tomoyo_io_buffer *head)
{
struct tomoyo_log *ptr = NULL;
if (head->r.w_pos)
return;
kfree(head->read_buf);
head->read_buf = NULL;
spin_lock(&tomoyo_log_lock);
if (!list_empty(&tomoyo_log)) {
ptr = list_entry(tomoyo_log.next, typeof(*ptr), list);
list_del(&ptr->list);
tomoyo_log_count--;
tomoyo_memory_used[TOMOYO_MEMORY_AUDIT] -= ptr->size;
}
spin_unlock(&tomoyo_log_lock);
if (ptr) {
head->read_buf = ptr->log;
head->r.w[head->r.w_pos++] = head->read_buf;
kfree(ptr);
}
}
/**
* tomoyo_poll_log - Wait for an audit log.
*
* @file: Pointer to "struct file".
* @wait: Pointer to "poll_table".
*
* Returns POLLIN | POLLRDNORM when ready to read an audit log.
*/
int tomoyo_poll_log(struct file *file, poll_table *wait)
{
if (tomoyo_log_count)
return POLLIN | POLLRDNORM;
poll_wait(file, &tomoyo_log_wait, wait);
if (tomoyo_log_count)
return POLLIN | POLLRDNORM;
return 0;
}

311
security/tomoyo/common.c
View File

@ -17,9 +17,12 @@ static unsigned int tomoyo_profile_version;
/* Profile table. Memory is allocated as needed. */
static struct tomoyo_profile *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
/* String table for functionality that takes 4 modes. */
static const char *tomoyo_mode[4] = {
"disabled", "learning", "permissive", "enforcing"
/* String table for operation mode. */
const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE] = {
[TOMOYO_CONFIG_DISABLED] = "disabled",
[TOMOYO_CONFIG_LEARNING] = "learning",
[TOMOYO_CONFIG_PERMISSIVE] = "permissive",
[TOMOYO_CONFIG_ENFORCING] = "enforcing"
};
/* String table for /sys/kernel/security/tomoyo/profile */
@ -53,6 +56,7 @@ static const char *tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
/* String table for PREFERENCE keyword. */
static const char * const tomoyo_pref_keywords[TOMOYO_MAX_PREF] = {
[TOMOYO_PREF_MAX_AUDIT_LOG] = "max_audit_log",
[TOMOYO_PREF_MAX_LEARNING_ENTRY] = "max_learning_entry",
};
@ -66,12 +70,10 @@ static bool tomoyo_manage_by_non_root;
*
* @value: Bool value.
*/
/*
static const char *tomoyo_yesno(const unsigned int value)
const char *tomoyo_yesno(const unsigned int value)
{
return value ? "yes" : "no";
}
*/
/**
* tomoyo_addprintf - strncat()-like-snprintf().
@ -117,7 +119,7 @@ static bool tomoyo_flush(struct tomoyo_io_buffer *head)
head->r.w[0] = w;
if (*w)
return false;
/* Add '\0' for query. */
/* Add '\0' for audit logs and query. */
if (head->poll) {
if (!head->read_user_buf_avail ||
copy_to_user(head->read_user_buf, "", 1))
@ -300,9 +302,12 @@ static struct tomoyo_profile *tomoyo_assign_profile(const unsigned int profile)
ptr = tomoyo_profile_ptr[profile];
if (!ptr && tomoyo_memory_ok(entry)) {
ptr = entry;
ptr->default_config = TOMOYO_CONFIG_DISABLED;
ptr->default_config = TOMOYO_CONFIG_DISABLED |
TOMOYO_CONFIG_WANT_GRANT_LOG |
TOMOYO_CONFIG_WANT_REJECT_LOG;
memset(ptr->config, TOMOYO_CONFIG_USE_DEFAULT,
sizeof(ptr->config));
ptr->pref[TOMOYO_PREF_MAX_AUDIT_LOG] = 1024;
ptr->pref[TOMOYO_PREF_MAX_LEARNING_ENTRY] = 2048;
mb(); /* Avoid out-of-order execution. */
tomoyo_profile_ptr[profile] = ptr;
@ -338,7 +343,6 @@ struct tomoyo_profile *tomoyo_profile(const u8 profile)
*
* Returns 1 if "@find=yes" was found, 0 if "@find=no" was found, -1 otherwise.
*/
/*
static s8 tomoyo_find_yesno(const char *string, const char *find)
{
const char *cp = strstr(string, find);
@ -351,7 +355,6 @@ static s8 tomoyo_find_yesno(const char *string, const char *find)
}
return -1;
}
*/
/**
* tomoyo_set_uint - Set value for specified preference.
@ -412,6 +415,24 @@ static int tomoyo_set_mode(char *name, const char *value,
* 'config' from 'TOMOYO_CONFIG_USE_DEAFULT'.
*/
config = (config & ~7) | mode;
if (config != TOMOYO_CONFIG_USE_DEFAULT) {
switch (tomoyo_find_yesno(value, "grant_log")) {
case 1:
config |= TOMOYO_CONFIG_WANT_GRANT_LOG;
break;
case 0:
config &= ~TOMOYO_CONFIG_WANT_GRANT_LOG;
break;
}
switch (tomoyo_find_yesno(value, "reject_log")) {
case 1:
config |= TOMOYO_CONFIG_WANT_REJECT_LOG;
break;
case 0:
config &= ~TOMOYO_CONFIG_WANT_REJECT_LOG;
break;
}
}
}
if (i < TOMOYO_MAX_MAC_INDEX + TOMOYO_MAX_MAC_CATEGORY_INDEX)
profile->config[i] = config;
@ -469,15 +490,30 @@ static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
return tomoyo_set_mode(data, cp, profile);
}
/**
* tomoyo_print_config - Print mode for specified functionality.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @config: Mode for that functionality.
*
* Returns nothing.
*
* Caller prints functionality's name.
*/
static void tomoyo_print_config(struct tomoyo_io_buffer *head, const u8 config)
{
tomoyo_io_printf(head, "={ mode=%s }\n", tomoyo_mode[config & 3]);
tomoyo_io_printf(head, "={ mode=%s grant_log=%s reject_log=%s }\n",
tomoyo_mode[config & 3],
tomoyo_yesno(config & TOMOYO_CONFIG_WANT_GRANT_LOG),
tomoyo_yesno(config & TOMOYO_CONFIG_WANT_REJECT_LOG));
}
/**
* tomoyo_read_profile - Read profile table.
*
* @head: Pointer to "struct tomoyo_io_buffer".
*
* Returns nothing.
*/
static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
{
@ -488,7 +524,7 @@ static void tomoyo_read_profile(struct tomoyo_io_buffer *head)
profile = tomoyo_profile_ptr[index];
switch (head->r.step) {
case 0:
tomoyo_io_printf(head, "PROFILE_VERSION=%s\n", "20090903");
tomoyo_io_printf(head, "PROFILE_VERSION=%u\n", 20090903);
head->r.step++;
break;
case 1:
@ -1359,103 +1395,68 @@ static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
head->r.eof = true;
}
/**
* tomoyo_print_header - Get header line of audit log.
*
* @r: Pointer to "struct tomoyo_request_info".
*
* Returns string representation.
*
* This function uses kmalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
static char *tomoyo_print_header(struct tomoyo_request_info *r)
{
struct timeval tv;
const pid_t gpid = task_pid_nr(current);
static const int tomoyo_buffer_len = 4096;
char *buffer = kmalloc(tomoyo_buffer_len, GFP_NOFS);
pid_t ppid;
if (!buffer)
return NULL;
do_gettimeofday(&tv);
rcu_read_lock();
ppid = task_tgid_vnr(current->real_parent);
rcu_read_unlock();
snprintf(buffer, tomoyo_buffer_len - 1,
"#timestamp=%lu profile=%u mode=%s (global-pid=%u)"
" task={ pid=%u ppid=%u uid=%u gid=%u euid=%u"
" egid=%u suid=%u sgid=%u fsuid=%u fsgid=%u }",
tv.tv_sec, r->profile, tomoyo_mode[r->mode], gpid,
task_tgid_vnr(current), ppid,
current_uid(), current_gid(), current_euid(),
current_egid(), current_suid(), current_sgid(),
current_fsuid(), current_fsgid());
return buffer;
}
/**
* tomoyo_init_audit_log - Allocate buffer for audit logs.
*
* @len: Required size.
* @r: Pointer to "struct tomoyo_request_info".
*
* Returns pointer to allocated memory.
*
* The @len is updated to add the header lines' size on success.
*
* This function uses kzalloc(), so caller must kfree() if this function
* didn't return NULL.
*/
static char *tomoyo_init_audit_log(int *len, struct tomoyo_request_info *r)
{
char *buf = NULL;
const char *header;
const char *domainname;
if (!r->domain)
r->domain = tomoyo_domain();
domainname = r->domain->domainname->name;
header = tomoyo_print_header(r);
if (!header)
return NULL;
*len += strlen(domainname) + strlen(header) + 10;
buf = kzalloc(*len, GFP_NOFS);
if (buf)
snprintf(buf, (*len) - 1, "%s\n%s\n", header, domainname);
kfree(header);
return buf;
}
/* Wait queue for tomoyo_query_list. */
/* Wait queue for kernel -> userspace notification. */
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_query_wait);
/* Lock for manipulating tomoyo_query_list. */
static DEFINE_SPINLOCK(tomoyo_query_list_lock);
/* Wait queue for userspace -> kernel notification. */
static DECLARE_WAIT_QUEUE_HEAD(tomoyo_answer_wait);
/* Structure for query. */
struct tomoyo_query {
struct list_head list;
char *query;
int query_len;
size_t query_len;
unsigned int serial;
int timer;
int answer;
u8 timer;
u8 answer;
u8 retry;
};
/* The list for "struct tomoyo_query". */
static LIST_HEAD(tomoyo_query_list);
/* Lock for manipulating tomoyo_query_list. */
static DEFINE_SPINLOCK(tomoyo_query_list_lock);
/*
* Number of "struct file" referring /sys/kernel/security/tomoyo/query
* interface.
*/
static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
/**
* tomoyo_add_entry - Add an ACL to current thread's domain. Used by learning mode.
*
* @domain: Pointer to "struct tomoyo_domain_info".
* @header: Lines containing ACL.
*
* Returns nothing.
*/
static void tomoyo_add_entry(struct tomoyo_domain_info *domain, char *header)
{
char *buffer;
char *cp = strchr(header, '\n');
int len;
if (!cp)
return;
cp = strchr(cp + 1, '\n');
if (!cp)
return;
*cp++ = '\0';
len = strlen(cp) + 1;
buffer = kmalloc(len, GFP_NOFS);
if (!buffer)
return;
snprintf(buffer, len - 1, "%s", cp);
tomoyo_normalize_line(buffer);
tomoyo_write_domain2(&domain->acl_info_list, buffer, false);
kfree(buffer);
}
/**
* tomoyo_supervisor - Ask for the supervisor's decision.
*
* @r: Pointer to "struct tomoyo_request_info".
* @fmt: The printf()'s format string, followed by parameters.
* @r: Pointer to "struct tomoyo_request_info".
* @fmt: The printf()'s format string, followed by parameters.
*
* Returns 0 if the supervisor decided to permit the access request which
* violated the policy in enforcing mode, TOMOYO_RETRY_REQUEST if the
@ -1465,88 +1466,77 @@ static atomic_t tomoyo_query_observers = ATOMIC_INIT(0);
int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
{
va_list args;
int error = -EPERM;
int pos;
int error;
int len;
static unsigned int tomoyo_serial;
struct tomoyo_query *entry = NULL;
struct tomoyo_query entry = { };
bool quota_exceeded = false;
char *header;
va_start(args, fmt);
len = vsnprintf((char *) &len, 1, fmt, args) + 1;
va_end(args);
/* Write /sys/kernel/security/tomoyo/audit. */
va_start(args, fmt);
tomoyo_write_log2(r, len, fmt, args);
va_end(args);
/* Nothing more to do if granted. */
if (r->granted)
return 0;
switch (r->mode) {
char *buffer;
case TOMOYO_CONFIG_ENFORCING:
error = -EPERM;
if (atomic_read(&tomoyo_query_observers))
break;
goto out;
case TOMOYO_CONFIG_LEARNING:
if (!tomoyo_domain_quota_is_ok(r))
return 0;
va_start(args, fmt);
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4;
va_end(args);
buffer = kmalloc(len, GFP_NOFS);
if (!buffer)
return 0;
va_start(args, fmt);
vsnprintf(buffer, len - 1, fmt, args);
va_end(args);
tomoyo_normalize_line(buffer);
tomoyo_write_domain2(&r->domain->acl_info_list, buffer, false);
kfree(buffer);
error = 0;
/* Check max_learning_entry parameter. */
if (tomoyo_domain_quota_is_ok(r))
break;
/* fall through */
case TOMOYO_CONFIG_PERMISSIVE:
default:
return 0;
}
if (!r->domain)
r->domain = tomoyo_domain();
if (!atomic_read(&tomoyo_query_observers))
return -EPERM;
/* Get message. */
va_start(args, fmt);
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32;
entry.query = tomoyo_init_log(r, len, fmt, args);
va_end(args);
header = tomoyo_init_audit_log(&len, r);
if (!header)
if (!entry.query)
goto out;
entry = kzalloc(sizeof(*entry), GFP_NOFS);
if (!entry)
entry.query_len = strlen(entry.query) + 1;
if (!error) {
tomoyo_add_entry(r->domain, entry.query);
goto out;
entry->query = kzalloc(len, GFP_NOFS);
if (!entry->query)
goto out;
len = ksize(entry->query);
}
len = tomoyo_round2(entry.query_len);
spin_lock(&tomoyo_query_list_lock);
if (tomoyo_quota_for_query && tomoyo_query_memory_size + len +
sizeof(*entry) >= tomoyo_quota_for_query) {
if (tomoyo_memory_quota[TOMOYO_MEMORY_QUERY] &&
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] + len
>= tomoyo_memory_quota[TOMOYO_MEMORY_QUERY]) {
quota_exceeded = true;
} else {
tomoyo_query_memory_size += len + sizeof(*entry);
entry->serial = tomoyo_serial++;
entry.serial = tomoyo_serial++;
entry.retry = r->retry;
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] += len;
list_add_tail(&entry.list, &tomoyo_query_list);
}
spin_unlock(&tomoyo_query_list_lock);
if (quota_exceeded)
goto out;
pos = snprintf(entry->query, len - 1, "Q%u-%hu\n%s",
entry->serial, r->retry, header);
kfree(header);
header = NULL;
va_start(args, fmt);
vsnprintf(entry->query + pos, len - 1 - pos, fmt, args);
entry->query_len = strlen(entry->query) + 1;
va_end(args);
spin_lock(&tomoyo_query_list_lock);
list_add_tail(&entry->list, &tomoyo_query_list);
spin_unlock(&tomoyo_query_list_lock);
/* Give 10 seconds for supervisor's opinion. */
for (entry->timer = 0;
atomic_read(&tomoyo_query_observers) && entry->timer < 100;
entry->timer++) {
wake_up(&tomoyo_query_wait);
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ / 10);
if (entry->answer)
while (entry.timer < 10) {
wake_up_all(&tomoyo_query_wait);
if (wait_event_interruptible_timeout
(tomoyo_answer_wait, entry.answer ||
!atomic_read(&tomoyo_query_observers), HZ))
break;
else
entry.timer++;
}
spin_lock(&tomoyo_query_list_lock);
list_del(&entry->list);
tomoyo_query_memory_size -= len + sizeof(*entry);
list_del(&entry.list);
tomoyo_memory_used[TOMOYO_MEMORY_QUERY] -= len;
spin_unlock(&tomoyo_query_list_lock);
switch (entry->answer) {
switch (entry.answer) {
case 3: /* Asked to retry by administrator. */
error = TOMOYO_RETRY_REQUEST;
r->retry++;
@ -1555,18 +1545,12 @@ int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
/* Granted by administrator. */
error = 0;
break;
case 0:
/* Timed out. */
break;
default:
/* Rejected by administrator. */
/* Timed out or rejected by administrator. */
break;
}
out:
if (entry)
kfree(entry->query);
kfree(entry);
kfree(header);
out:
kfree(entry.query);
return error;
}
@ -1637,7 +1621,7 @@ static void tomoyo_read_query(struct tomoyo_io_buffer *head)
head->r.query_index = 0;
return;
}
buf = kzalloc(len, GFP_NOFS);
buf = kzalloc(len + 32, GFP_NOFS);
if (!buf)
return;
pos = 0;
@ -1653,7 +1637,8 @@ static void tomoyo_read_query(struct tomoyo_io_buffer *head)
* can change, but I don't care.
*/
if (len == ptr->query_len)
memmove(buf, ptr->query, len);
snprintf(buf, len + 31, "Q%u-%hu\n%s", ptr->serial,
ptr->retry, ptr->query);
break;
}
spin_unlock(&tomoyo_query_list_lock);
@ -1764,6 +1749,11 @@ int tomoyo_open_control(const u8 type, struct file *file)
head->write = tomoyo_write_exception;
head->read = tomoyo_read_exception;
break;
case TOMOYO_AUDIT:
/* /sys/kernel/security/tomoyo/audit */
head->poll = tomoyo_poll_log;
head->read = tomoyo_read_log;
break;
case TOMOYO_SELFDOMAIN:
/* /sys/kernel/security/tomoyo/self_domain */
head->read = tomoyo_read_self_domain;
@ -1837,7 +1827,7 @@ int tomoyo_open_control(const u8 type, struct file *file)
return -ENOMEM;
}
}
if (type != TOMOYO_QUERY)
if (type != TOMOYO_QUERY && type != TOMOYO_AUDIT)
head->reader_idx = tomoyo_read_lock();
file->private_data = head;
/*
@ -1858,7 +1848,8 @@ int tomoyo_open_control(const u8 type, struct file *file)
* @wait: Pointer to "poll_table".
*
* Waits for read readiness.
* /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd .
* /sys/kernel/security/tomoyo/query is handled by /usr/sbin/tomoyo-queryd and
* /sys/kernel/security/tomoyo/audit is handled by /usr/sbin/tomoyo-auditd.
*/
int tomoyo_poll_control(struct file *file, poll_table *wait)
{
@ -1970,7 +1961,7 @@ int tomoyo_close_control(struct tomoyo_io_buffer *head)
*/
if (head->type == TOMOYO_QUERY)
atomic_dec(&tomoyo_query_observers);
else
else if (head->type != TOMOYO_AUDIT)
tomoyo_read_unlock(head->reader_idx);
/* Release memory used for policy I/O. */
kfree(head->read_buf);

83
security/tomoyo/common.h
View File

@ -44,7 +44,10 @@ enum tomoyo_mode_index {
TOMOYO_CONFIG_LEARNING,
TOMOYO_CONFIG_PERMISSIVE,
TOMOYO_CONFIG_ENFORCING,
TOMOYO_CONFIG_USE_DEFAULT = 255
TOMOYO_CONFIG_MAX_MODE,
TOMOYO_CONFIG_WANT_REJECT_LOG = 64,
TOMOYO_CONFIG_WANT_GRANT_LOG = 128,
TOMOYO_CONFIG_USE_DEFAULT = 255,
};
/* Index numbers for entry type. */
@ -115,6 +118,13 @@ enum tomoyo_path_acl_index {
TOMOYO_MAX_PATH_OPERATION
};
enum tomoyo_memory_stat_type {
TOMOYO_MEMORY_POLICY,
TOMOYO_MEMORY_AUDIT,
TOMOYO_MEMORY_QUERY,
TOMOYO_MAX_MEMORY_STAT
};
enum tomoyo_mkdev_acl_index {
TOMOYO_TYPE_MKBLOCK,
TOMOYO_TYPE_MKCHAR,
@ -150,6 +160,7 @@ enum tomoyo_securityfs_interface_index {
TOMOYO_PROCESS_STATUS,
TOMOYO_MEMINFO,
TOMOYO_SELFDOMAIN,
TOMOYO_AUDIT,
TOMOYO_VERSION,
TOMOYO_PROFILE,
TOMOYO_QUERY,
@ -213,6 +224,7 @@ enum tomoyo_mac_category_index {
/* Index numbers for profile's PREFERENCE values. */
enum tomoyo_pref_index {
TOMOYO_PREF_MAX_AUDIT_LOG,
TOMOYO_PREF_MAX_LEARNING_ENTRY,
TOMOYO_MAX_PREF
};
@ -506,13 +518,21 @@ struct tomoyo_profile {
unsigned int pref[TOMOYO_MAX_PREF];
};
/* Structure for representing YYYY/MM/DD hh/mm/ss. */
struct tomoyo_time {
u16 year;
u8 month;
u8 day;
u8 hour;
u8 min;
u8 sec;
};
/********** Function prototypes. **********/
bool tomoyo_str_starts(char **src, const char *find);
const char *tomoyo_get_exe(void);
void tomoyo_normalize_line(unsigned char *buffer);
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
void tomoyo_check_profile(void);
int tomoyo_open_control(const u8 type, struct file *file);
int tomoyo_close_control(struct tomoyo_io_buffer *head);
@ -620,6 +640,14 @@ void tomoyo_check_acl(struct tomoyo_request_info *r,
char *tomoyo_read_token(struct tomoyo_acl_param *param);
bool tomoyo_permstr(const char *string, const char *keyword);
const char *tomoyo_yesno(const unsigned int value);
void tomoyo_write_log2(struct tomoyo_request_info *r, int len, const char *fmt,
va_list args);
void tomoyo_read_log(struct tomoyo_io_buffer *head);
int tomoyo_poll_log(struct file *file, poll_table *wait);
char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
va_list args);
/********** External variable definitions. **********/
/* Lock for GC. */
@ -650,8 +678,9 @@ extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
extern const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION];
extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
extern unsigned int tomoyo_quota_for_query;
extern unsigned int tomoyo_query_memory_size;
extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
extern unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
extern unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
/********** Inlined functions. **********/
@ -773,6 +802,50 @@ static inline bool tomoyo_same_number_union
a->value_type[1] == b->value_type[1];
}
#if defined(CONFIG_SLOB)
/**
* tomoyo_round2 - Round up to power of 2 for calculating memory usage.
*
* @size: Size to be rounded up.
*
* Returns @size.
*
* Since SLOB does not round up, this function simply returns @size.
*/
static inline int tomoyo_round2(size_t size)
{
return size;
}
#else
/**
* tomoyo_round2 - Round up to power of 2 for calculating memory usage.
*
* @size: Size to be rounded up.
*
* Returns rounded size.
*
* Strictly speaking, SLAB may be able to allocate (e.g.) 96 bytes instead of
* (e.g.) 128 bytes.
*/
static inline int tomoyo_round2(size_t size)
{
#if PAGE_SIZE == 4096
size_t bsize = 32;
#else
size_t bsize = 64;
#endif
if (!size)
return 0;
while (size > bsize)
bsize <<= 1;
return bsize;
}
#endif
/**
* list_for_each_cookie - iterate over a list with cookie.
* @pos: the &struct list_head to use as a loop cursor.

49
security/tomoyo/file.c
View File

@ -206,12 +206,9 @@ static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, struct path *path)
*/
static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
{
const char *operation = tomoyo_path_keyword[r->param.path.operation];
const struct tomoyo_path_info *filename = r->param.path.filename;
if (r->granted)
return 0;
tomoyo_warn_log(r, "%s %s", operation, filename->name);
return tomoyo_supervisor(r, "file %s %s\n", operation, filename->name);
return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword
[r->param.path.operation],
r->param.path.filename->name);
}
/**
@ -223,15 +220,10 @@ static int tomoyo_audit_path_log(struct tomoyo_request_info *r)
*/
static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
{
const char *operation = tomoyo_path2_keyword[r->param.path2.operation];
const struct tomoyo_path_info *filename1 = r->param.path2.filename1;
const struct tomoyo_path_info *filename2 = r->param.path2.filename2;
if (r->granted)
return 0;
tomoyo_warn_log(r, "%s %s %s", operation, filename1->name,
filename2->name);
return tomoyo_supervisor(r, "file %s %s %s\n", operation,
filename1->name, filename2->name);
return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_path2_keyword
[r->param.path2.operation],
r->param.path2.filename1->name,
r->param.path2.filename2->name);
}
/**
@ -243,17 +235,12 @@ static int tomoyo_audit_path2_log(struct tomoyo_request_info *r)
*/
static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r)
{
const char *operation = tomoyo_mkdev_keyword[r->param.mkdev.operation];
const struct tomoyo_path_info *filename = r->param.mkdev.filename;
const unsigned int major = r->param.mkdev.major;
const unsigned int minor = r->param.mkdev.minor;
const unsigned int mode = r->param.mkdev.mode;
if (r->granted)
return 0;
tomoyo_warn_log(r, "%s %s 0%o %u %u", operation, filename->name, mode,
major, minor);
return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", operation,
filename->name, mode, major, minor);
return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n",
tomoyo_mkdev_keyword
[r->param.mkdev.operation],
r->param.mkdev.filename->name,
r->param.mkdev.mode, r->param.mkdev.major,
r->param.mkdev.minor);
}
/**
@ -267,11 +254,7 @@ static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
{
const u8 type = r->param.path_number.operation;
u8 radix;
const struct tomoyo_path_info *filename = r->param.path_number.filename;
const char *operation = tomoyo_path_number_keyword[type];
char buffer[64];
if (r->granted)
return 0;
switch (type) {
case TOMOYO_TYPE_CREATE:
case TOMOYO_TYPE_MKDIR:
@ -289,9 +272,9 @@ static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r)
}
tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number,
radix);
tomoyo_warn_log(r, "%s %s %s", operation, filename->name, buffer);
return tomoyo_supervisor(r, "file %s %s %s\n", operation,
filename->name, buffer);
return tomoyo_supervisor(r, "file %s %s %s\n",
tomoyo_path_number_keyword[type],
r->param.path_number.filename->name, buffer);
}
/**

5
security/tomoyo/memory.c
View File

@ -29,6 +29,11 @@ void tomoyo_warn_oom(const char *function)
panic("MAC Initialization failed.\n");
}
/* Memoy currently used by policy/audit log/query. */
unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
/* Memory quota for "policy"/"audit log"/"query". */
unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
/* Memory allocated for policy. */
static atomic_t tomoyo_policy_memory_size;
/* Quota for holding policy. */

26
security/tomoyo/mount.c
View File

@ -27,29 +27,11 @@ static const char * const tomoyo_mounts[TOMOYO_MAX_SPECIAL_MOUNT] = {
*/
static int tomoyo_audit_mount_log(struct tomoyo_request_info *r)
{
const char *dev = r->param.mount.dev->name;
const char *dir = r->param.mount.dir->name;
const char *type = r->param.mount.type->name;
const unsigned long flags = r->param.mount.flags;
if (r->granted)
return 0;
if (type == tomoyo_mounts[TOMOYO_MOUNT_REMOUNT])
tomoyo_warn_log(r, "mount -o remount %s 0x%lX", dir, flags);
else if (type == tomoyo_mounts[TOMOYO_MOUNT_BIND]
|| type == tomoyo_mounts[TOMOYO_MOUNT_MOVE])
tomoyo_warn_log(r, "mount %s %s %s 0x%lX", type, dev, dir,
flags);
else if (type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_UNBINDABLE] ||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_PRIVATE] ||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SLAVE] ||
type == tomoyo_mounts[TOMOYO_MOUNT_MAKE_SHARED])
tomoyo_warn_log(r, "mount %s %s 0x%lX", type, dir, flags);
else
tomoyo_warn_log(r, "mount -t %s %s %s 0x%lX", type, dev, dir,
flags);
return tomoyo_supervisor(r, "allow_mount %s %s %s 0x%lX\n",
return tomoyo_supervisor(r, "file mount %s %s %s 0x%lX\n",
r->param.mount.dev->name,
r->param.mount.dir->name, type, flags);
r->param.mount.dir->name,
r->param.mount.type->name,
r->param.mount.flags);
}
/**

2
security/tomoyo/securityfs_if.c
View File

@ -135,6 +135,8 @@ static int __init tomoyo_initerface_init(void)
TOMOYO_DOMAINPOLICY);
tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
TOMOYO_EXCEPTIONPOLICY);
tomoyo_create_entry("audit", 0400, tomoyo_dir,
TOMOYO_AUDIT);
tomoyo_create_entry("self_domain", 0400, tomoyo_dir,
TOMOYO_SELFDOMAIN);
tomoyo_create_entry(".domain_status", 0600, tomoyo_dir,

14
security/tomoyo/util.c
View File

@ -891,20 +891,6 @@ const char *tomoyo_last_word(const char *name)
return name;
}
/**
* tomoyo_warn_log - Print warning or error message on console.
*
* @r: Pointer to "struct tomoyo_request_info".
* @fmt: The printf()'s format string, followed by parameters.
*/
void tomoyo_warn_log(struct tomoyo_request_info *r, const char *fmt, ...)
{
/*
* Temporarily disabled.
* Will be replaced with /sys/kernel/security/tomoyo/audit interface.
*/
}
/**
* tomoyo_domain_quota_is_ok - Check for domain's quota.
*