3 |
* |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
* Implementation of the Domain-Based Mandatory Access Control. |
5 |
* |
* |
6 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
7 |
* |
* |
8 |
* Version: 1.6.5-pre 2008/10/11 |
* Version: 1.6.8-pre 2009/05/08 |
9 |
* |
* |
10 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
11 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
16 |
#include <linux/tomoyo.h> |
#include <linux/tomoyo.h> |
17 |
#include <linux/realpath.h> |
#include <linux/realpath.h> |
18 |
#include <linux/highmem.h> |
#include <linux/highmem.h> |
|
#include <linux/binfmts.h> |
|
19 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
20 |
#include <linux/namei.h> |
#include <linux/namei.h> |
21 |
#include <linux/mount.h> |
#include <linux/mount.h> |
22 |
#endif |
#endif |
23 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30) |
24 |
|
#include <linux/fs_struct.h> |
25 |
|
#endif |
26 |
|
|
27 |
/* For compatibility with older kernels. */ |
/* For compatibility with older kernels. */ |
28 |
#ifndef for_each_process |
#ifndef for_each_process |
32 |
/* Variables definitions.*/ |
/* Variables definitions.*/ |
33 |
|
|
34 |
/* The initial domain. */ |
/* The initial domain. */ |
35 |
struct domain_info KERNEL_DOMAIN; |
struct ccs_domain_info ccs_kernel_domain; |
36 |
|
|
37 |
/* The list for "struct domain_info". */ |
/* The list for "struct ccs_domain_info". */ |
38 |
LIST1_HEAD(domain_list); |
LIST1_HEAD(ccs_domain_list); |
39 |
|
|
40 |
#ifdef CONFIG_TOMOYO |
#ifdef CONFIG_TOMOYO |
41 |
|
|
42 |
/* Domain creation lock. */ |
/* Domain creation lock. */ |
43 |
static DEFINE_MUTEX(domain_list_lock); |
static DEFINE_MUTEX(ccs_domain_list_lock); |
44 |
|
|
45 |
/* Structure for "initialize_domain" and "no_initialize_domain" keyword. */ |
/* Structure for "initialize_domain" and "no_initialize_domain" keyword. */ |
46 |
struct domain_initializer_entry { |
struct ccs_domain_initializer_entry { |
47 |
struct list1_head list; |
struct list1_head list; |
48 |
const struct path_info *domainname; /* This may be NULL */ |
const struct ccs_path_info *domainname; /* This may be NULL */ |
49 |
const struct path_info *program; |
const struct ccs_path_info *program; |
50 |
bool is_deleted; |
bool is_deleted; |
51 |
bool is_not; /* True if this entry is "no_initialize_domain". */ |
bool is_not; /* True if this entry is "no_initialize_domain". */ |
52 |
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
53 |
}; |
}; |
54 |
|
|
55 |
/* Structure for "keep_domain" and "no_keep_domain" keyword. */ |
/* Structure for "keep_domain" and "no_keep_domain" keyword. */ |
56 |
struct domain_keeper_entry { |
struct ccs_domain_keeper_entry { |
57 |
struct list1_head list; |
struct list1_head list; |
58 |
const struct path_info *domainname; |
const struct ccs_path_info *domainname; |
59 |
const struct path_info *program; /* This may be NULL */ |
const struct ccs_path_info *program; /* This may be NULL */ |
60 |
bool is_deleted; |
bool is_deleted; |
61 |
bool is_not; /* True if this entry is "no_keep_domain". */ |
bool is_not; /* True if this entry is "no_keep_domain". */ |
62 |
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
63 |
}; |
}; |
64 |
|
|
65 |
/* Structure for "aggregator" keyword. */ |
/* Structure for "aggregator" keyword. */ |
66 |
struct aggregator_entry { |
struct ccs_aggregator_entry { |
67 |
struct list1_head list; |
struct list1_head list; |
68 |
const struct path_info *original_name; |
const struct ccs_path_info *original_name; |
69 |
const struct path_info *aggregated_name; |
const struct ccs_path_info *aggregated_name; |
70 |
bool is_deleted; |
bool is_deleted; |
71 |
}; |
}; |
72 |
|
|
73 |
/* Structure for "alias" keyword. */ |
/* Structure for "alias" keyword. */ |
74 |
struct alias_entry { |
struct ccs_alias_entry { |
75 |
struct list1_head list; |
struct list1_head list; |
76 |
const struct path_info *original_name; |
const struct ccs_path_info *original_name; |
77 |
const struct path_info *aliased_name; |
const struct ccs_path_info *aliased_name; |
78 |
bool is_deleted; |
bool is_deleted; |
79 |
}; |
}; |
80 |
|
|
81 |
/** |
/** |
82 |
* ccs_set_domain_flag - Set or clear domain's attribute flags. |
* ccs_set_domain_flag - Set or clear domain's attribute flags. |
83 |
* |
* |
84 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
85 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
86 |
* @flags: Flags to set or clear. |
* @flags: Flags to set or clear. |
87 |
* |
* |
88 |
* Returns nothing. |
* Returns nothing. |
89 |
*/ |
*/ |
90 |
void ccs_set_domain_flag(struct domain_info *domain, const bool is_delete, |
void ccs_set_domain_flag(struct ccs_domain_info *domain, const bool is_delete, |
91 |
const u8 flags) |
const u8 flags) |
92 |
{ |
{ |
93 |
/* We need to serialize because this is bitfield operation. */ |
/* We need to serialize because this is bitfield operation. */ |
105 |
/** |
/** |
106 |
* ccs_get_last_name - Get last component of a domainname. |
* ccs_get_last_name - Get last component of a domainname. |
107 |
* |
* |
108 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
109 |
* |
* |
110 |
* Returns the last component of the domainname. |
* Returns the last component of the domainname. |
111 |
*/ |
*/ |
112 |
const char *ccs_get_last_name(const struct domain_info *domain) |
const char *ccs_get_last_name(const struct ccs_domain_info *domain) |
113 |
{ |
{ |
114 |
const char *cp0 = domain->domainname->name; |
const char *cp0 = domain->domainname->name; |
115 |
const char *cp1 = strrchr(cp0, ' '); |
const char *cp1 = strrchr(cp0, ' '); |
121 |
/** |
/** |
122 |
* ccs_add_domain_acl - Add the given ACL to the given domain. |
* ccs_add_domain_acl - Add the given ACL to the given domain. |
123 |
* |
* |
124 |
* @domain: Pointer to "struct domain_info". May be NULL. |
* @domain: Pointer to "struct ccs_domain_info". May be NULL. |
125 |
* @acl: Pointer to "struct acl_info". |
* @acl: Pointer to "struct ccs_acl_info". |
126 |
* |
* |
127 |
* Returns 0. |
* Returns 0. |
128 |
*/ |
*/ |
129 |
int ccs_add_domain_acl(struct domain_info *domain, struct acl_info *acl) |
int ccs_add_domain_acl(struct ccs_domain_info *domain, struct ccs_acl_info *acl) |
130 |
{ |
{ |
131 |
if (domain) { |
if (domain) { |
132 |
/* |
/* |
149 |
/** |
/** |
150 |
* ccs_del_domain_acl - Delete the given ACL from the domain. |
* ccs_del_domain_acl - Delete the given ACL from the domain. |
151 |
* |
* |
152 |
* @acl: Pointer to "struct acl_info". May be NULL. |
* @acl: Pointer to "struct ccs_acl_info". May be NULL. |
153 |
* |
* |
154 |
* Returns 0. |
* Returns 0. |
155 |
*/ |
*/ |
156 |
int ccs_del_domain_acl(struct acl_info *acl) |
int ccs_del_domain_acl(struct ccs_acl_info *acl) |
157 |
{ |
{ |
158 |
if (acl) |
if (acl) |
159 |
acl->type |= ACL_DELETED; |
acl->type |= ACL_DELETED; |
162 |
} |
} |
163 |
|
|
164 |
/** |
/** |
165 |
* audit_execute_handler_log - Audit execute_handler log. |
* ccs_audit_execute_handler_log - Audit execute_handler log. |
166 |
* |
* |
167 |
|
* @ee: Pointer to "struct ccs_execve_entry". |
168 |
* @is_default: True if it is "execute_handler" log. |
* @is_default: True if it is "execute_handler" log. |
|
* @handler: The realpath of the handler. |
|
|
* @bprm: Pointer to "struct linux_binprm". |
|
169 |
* |
* |
170 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
171 |
*/ |
*/ |
172 |
static int audit_execute_handler_log(const bool is_default, |
static int ccs_audit_execute_handler_log(struct ccs_execve_entry *ee, |
173 |
const char *handler, |
const bool is_default) |
|
struct linux_binprm *bprm) |
|
174 |
{ |
{ |
175 |
struct ccs_request_info r; |
struct ccs_request_info *r = &ee->r; |
176 |
ccs_init_request_info(&r, NULL, CCS_TOMOYO_MAC_FOR_FILE); |
const char *handler = ee->handler->name; |
177 |
r.bprm = bprm; |
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_FILE); |
178 |
return ccs_write_audit_log(true, &r, "%s %s\n", |
return ccs_write_audit_log(true, r, "%s %s\n", |
179 |
is_default ? KEYWORD_EXECUTE_HANDLER : |
is_default ? KEYWORD_EXECUTE_HANDLER : |
180 |
KEYWORD_DENIED_EXECUTE_HANDLER, handler); |
KEYWORD_DENIED_EXECUTE_HANDLER, handler); |
181 |
} |
} |
182 |
|
|
183 |
/** |
/** |
184 |
* audit_domain_creation_log - Audit domain creation log. |
* ccs_audit_domain_creation_log - Audit domain creation log. |
185 |
* |
* |
186 |
* @domain: Pointer to "struct domain_info". |
* @domain: Pointer to "struct ccs_domain_info". |
187 |
* |
* |
188 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
189 |
*/ |
*/ |
190 |
static int audit_domain_creation_log(struct domain_info *domain) |
static int ccs_audit_domain_creation_log(struct ccs_domain_info *domain) |
191 |
{ |
{ |
192 |
struct ccs_request_info r; |
struct ccs_request_info r; |
193 |
ccs_init_request_info(&r, domain, CCS_TOMOYO_MAC_FOR_FILE); |
ccs_init_request_info(&r, domain, CCS_MAC_FOR_FILE); |
194 |
return ccs_write_audit_log(false, &r, "use_profile %u\n", r.profile); |
return ccs_write_audit_log(false, &r, "use_profile %u\n", r.profile); |
195 |
} |
} |
196 |
|
|
197 |
/* The list for "struct domain_initializer_entry". */ |
/* The list for "struct ccs_domain_initializer_entry". */ |
198 |
static LIST1_HEAD(domain_initializer_list); |
static LIST1_HEAD(ccs_domain_initializer_list); |
199 |
|
|
200 |
/** |
/** |
201 |
* update_domain_initializer_entry - Update "struct domain_initializer_entry" list. |
* ccs_update_domain_initializer_entry - Update "struct ccs_domain_initializer_entry" list. |
202 |
* |
* |
203 |
* @domainname: The name of domain. May be NULL. |
* @domainname: The name of domain. May be NULL. |
204 |
* @program: The name of program. |
* @program: The name of program. |
207 |
* |
* |
208 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
209 |
*/ |
*/ |
210 |
static int update_domain_initializer_entry(const char *domainname, |
static int ccs_update_domain_initializer_entry(const char *domainname, |
211 |
const char *program, |
const char *program, |
212 |
const bool is_not, |
const bool is_not, |
213 |
const bool is_delete) |
const bool is_delete) |
214 |
{ |
{ |
215 |
struct domain_initializer_entry *new_entry; |
struct ccs_domain_initializer_entry *new_entry; |
216 |
struct domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
217 |
static DEFINE_MUTEX(lock); |
static DEFINE_MUTEX(lock); |
218 |
const struct path_info *saved_program; |
const struct ccs_path_info *saved_program; |
219 |
const struct path_info *saved_domainname = NULL; |
const struct ccs_path_info *saved_domainname = NULL; |
220 |
int error = -ENOMEM; |
int error = -ENOMEM; |
221 |
bool is_last_name = false; |
bool is_last_name = false; |
222 |
if (!ccs_is_correct_path(program, 1, -1, -1, __func__)) |
if (!ccs_is_correct_path(program, 1, -1, -1, __func__)) |
235 |
if (!saved_program) |
if (!saved_program) |
236 |
return -ENOMEM; |
return -ENOMEM; |
237 |
mutex_lock(&lock); |
mutex_lock(&lock); |
238 |
list1_for_each_entry(ptr, &domain_initializer_list, list) { |
list1_for_each_entry(ptr, &ccs_domain_initializer_list, list) { |
239 |
if (ptr->is_not != is_not || |
if (ptr->is_not != is_not || |
240 |
ptr->domainname != saved_domainname || |
ptr->domainname != saved_domainname || |
241 |
ptr->program != saved_program) |
ptr->program != saved_program) |
255 |
new_entry->program = saved_program; |
new_entry->program = saved_program; |
256 |
new_entry->is_not = is_not; |
new_entry->is_not = is_not; |
257 |
new_entry->is_last_name = is_last_name; |
new_entry->is_last_name = is_last_name; |
258 |
list1_add_tail_mb(&new_entry->list, &domain_initializer_list); |
list1_add_tail_mb(&new_entry->list, &ccs_domain_initializer_list); |
259 |
error = 0; |
error = 0; |
260 |
out: |
out: |
261 |
mutex_unlock(&lock); |
mutex_unlock(&lock); |
264 |
} |
} |
265 |
|
|
266 |
/** |
/** |
267 |
* ccs_read_domain_initializer_policy - Read "struct domain_initializer_entry" list. |
* ccs_read_domain_initializer_policy - Read "struct ccs_domain_initializer_entry" list. |
268 |
* |
* |
269 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
270 |
* |
* |
273 |
bool ccs_read_domain_initializer_policy(struct ccs_io_buffer *head) |
bool ccs_read_domain_initializer_policy(struct ccs_io_buffer *head) |
274 |
{ |
{ |
275 |
struct list1_head *pos; |
struct list1_head *pos; |
276 |
list1_for_each_cookie(pos, head->read_var2, &domain_initializer_list) { |
list1_for_each_cookie(pos, head->read_var2, |
277 |
|
&ccs_domain_initializer_list) { |
278 |
const char *no; |
const char *no; |
279 |
const char *from = ""; |
const char *from = ""; |
280 |
const char *domain = ""; |
const char *domain = ""; |
281 |
struct domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
282 |
ptr = list1_entry(pos, struct domain_initializer_entry, list); |
ptr = list1_entry(pos, struct ccs_domain_initializer_entry, |
283 |
|
list); |
284 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
285 |
continue; |
continue; |
286 |
no = ptr->is_not ? "no_" : ""; |
no = ptr->is_not ? "no_" : ""; |
291 |
if (!ccs_io_printf(head, |
if (!ccs_io_printf(head, |
292 |
"%s" KEYWORD_INITIALIZE_DOMAIN "%s%s%s\n", |
"%s" KEYWORD_INITIALIZE_DOMAIN "%s%s%s\n", |
293 |
no, ptr->program->name, from, domain)) |
no, ptr->program->name, from, domain)) |
294 |
goto out; |
goto out; |
295 |
} |
} |
296 |
return true; |
return true; |
297 |
out: |
out: |
299 |
} |
} |
300 |
|
|
301 |
/** |
/** |
302 |
* ccs_write_domain_initializer_policy - Write "struct domain_initializer_entry" list. |
* ccs_write_domain_initializer_policy - Write "struct ccs_domain_initializer_entry" list. |
303 |
* |
* |
304 |
* @data: String to parse. |
* @data: String to parse. |
305 |
* @is_not: True if it is "no_initialize_domain" entry. |
* @is_not: True if it is "no_initialize_domain" entry. |
313 |
char *cp = strstr(data, " from "); |
char *cp = strstr(data, " from "); |
314 |
if (cp) { |
if (cp) { |
315 |
*cp = '\0'; |
*cp = '\0'; |
316 |
return update_domain_initializer_entry(cp + 6, data, is_not, |
return ccs_update_domain_initializer_entry(cp + 6, data, |
317 |
is_delete); |
is_not, is_delete); |
318 |
} |
} |
319 |
return update_domain_initializer_entry(NULL, data, is_not, is_delete); |
return ccs_update_domain_initializer_entry(NULL, data, is_not, |
320 |
|
is_delete); |
321 |
} |
} |
322 |
|
|
323 |
/** |
/** |
324 |
* is_domain_initializer - Check whether the given program causes domainname reinitialization. |
* ccs_is_domain_initializer - Check whether the given program causes domainname reinitialization. |
325 |
* |
* |
326 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
327 |
* @program: The name of program. |
* @program: The name of program. |
330 |
* Returns true if executing @program reinitializes domain transition, |
* Returns true if executing @program reinitializes domain transition, |
331 |
* false otherwise. |
* false otherwise. |
332 |
*/ |
*/ |
333 |
static bool is_domain_initializer(const struct path_info *domainname, |
static bool ccs_is_domain_initializer(const struct ccs_path_info *domainname, |
334 |
const struct path_info *program, |
const struct ccs_path_info *program, |
335 |
const struct path_info *last_name) |
const struct ccs_path_info *last_name) |
336 |
{ |
{ |
337 |
struct domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
338 |
bool flag = false; |
bool flag = false; |
339 |
list1_for_each_entry(ptr, &domain_initializer_list, list) { |
list1_for_each_entry(ptr, &ccs_domain_initializer_list, list) { |
340 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
341 |
continue; |
continue; |
342 |
if (ptr->domainname) { |
if (ptr->domainname) { |
357 |
return flag; |
return flag; |
358 |
} |
} |
359 |
|
|
360 |
/* The list for "struct domain_keeper_entry". */ |
/* The list for "struct ccs_domain_keeper_entry". */ |
361 |
static LIST1_HEAD(domain_keeper_list); |
static LIST1_HEAD(ccs_domain_keeper_list); |
362 |
|
|
363 |
/** |
/** |
364 |
* update_domain_keeper_entry - Update "struct domain_keeper_entry" list. |
* ccs_update_domain_keeper_entry - Update "struct ccs_domain_keeper_entry" list. |
365 |
* |
* |
366 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
367 |
* @program: The name of program. May be NULL. |
* @program: The name of program. May be NULL. |
370 |
* |
* |
371 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
372 |
*/ |
*/ |
373 |
static int update_domain_keeper_entry(const char *domainname, |
static int ccs_update_domain_keeper_entry(const char *domainname, |
374 |
const char *program, |
const char *program, |
375 |
const bool is_not, const bool is_delete) |
const bool is_not, |
376 |
{ |
const bool is_delete) |
377 |
struct domain_keeper_entry *new_entry; |
{ |
378 |
struct domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *new_entry; |
379 |
const struct path_info *saved_domainname; |
struct ccs_domain_keeper_entry *ptr; |
380 |
const struct path_info *saved_program = NULL; |
const struct ccs_path_info *saved_domainname; |
381 |
|
const struct ccs_path_info *saved_program = NULL; |
382 |
static DEFINE_MUTEX(lock); |
static DEFINE_MUTEX(lock); |
383 |
int error = -ENOMEM; |
int error = -ENOMEM; |
384 |
bool is_last_name = false; |
bool is_last_name = false; |
398 |
if (!saved_domainname) |
if (!saved_domainname) |
399 |
return -ENOMEM; |
return -ENOMEM; |
400 |
mutex_lock(&lock); |
mutex_lock(&lock); |
401 |
list1_for_each_entry(ptr, &domain_keeper_list, list) { |
list1_for_each_entry(ptr, &ccs_domain_keeper_list, list) { |
402 |
if (ptr->is_not != is_not || |
if (ptr->is_not != is_not || |
403 |
ptr->domainname != saved_domainname || |
ptr->domainname != saved_domainname || |
404 |
ptr->program != saved_program) |
ptr->program != saved_program) |
418 |
new_entry->program = saved_program; |
new_entry->program = saved_program; |
419 |
new_entry->is_not = is_not; |
new_entry->is_not = is_not; |
420 |
new_entry->is_last_name = is_last_name; |
new_entry->is_last_name = is_last_name; |
421 |
list1_add_tail_mb(&new_entry->list, &domain_keeper_list); |
list1_add_tail_mb(&new_entry->list, &ccs_domain_keeper_list); |
422 |
error = 0; |
error = 0; |
423 |
out: |
out: |
424 |
mutex_unlock(&lock); |
mutex_unlock(&lock); |
427 |
} |
} |
428 |
|
|
429 |
/** |
/** |
430 |
* ccs_write_domain_keeper_policy - Write "struct domain_keeper_entry" list. |
* ccs_write_domain_keeper_policy - Write "struct ccs_domain_keeper_entry" list. |
431 |
* |
* |
432 |
* @data: String to parse. |
* @data: String to parse. |
433 |
* @is_not: True if it is "no_keep_domain" entry. |
* @is_not: True if it is "no_keep_domain" entry. |
440 |
char *cp = strstr(data, " from "); |
char *cp = strstr(data, " from "); |
441 |
if (cp) { |
if (cp) { |
442 |
*cp = '\0'; |
*cp = '\0'; |
443 |
return update_domain_keeper_entry(cp + 6, data, |
return ccs_update_domain_keeper_entry(cp + 6, data, |
444 |
is_not, is_delete); |
is_not, is_delete); |
445 |
} |
} |
446 |
return update_domain_keeper_entry(data, NULL, is_not, is_delete); |
return ccs_update_domain_keeper_entry(data, NULL, is_not, is_delete); |
447 |
} |
} |
448 |
|
|
449 |
/** |
/** |
450 |
* ccs_read_domain_keeper_policy - Read "struct domain_keeper_entry" list. |
* ccs_read_domain_keeper_policy - Read "struct ccs_domain_keeper_entry" list. |
451 |
* |
* |
452 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
453 |
* |
* |
456 |
bool ccs_read_domain_keeper_policy(struct ccs_io_buffer *head) |
bool ccs_read_domain_keeper_policy(struct ccs_io_buffer *head) |
457 |
{ |
{ |
458 |
struct list1_head *pos; |
struct list1_head *pos; |
459 |
list1_for_each_cookie(pos, head->read_var2, &domain_keeper_list) { |
list1_for_each_cookie(pos, head->read_var2, &ccs_domain_keeper_list) { |
460 |
struct domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *ptr; |
461 |
const char *no; |
const char *no; |
462 |
const char *from = ""; |
const char *from = ""; |
463 |
const char *program = ""; |
const char *program = ""; |
464 |
ptr = list1_entry(pos, struct domain_keeper_entry, list); |
ptr = list1_entry(pos, struct ccs_domain_keeper_entry, list); |
465 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
466 |
continue; |
continue; |
467 |
no = ptr->is_not ? "no_" : ""; |
no = ptr->is_not ? "no_" : ""; |
472 |
if (!ccs_io_printf(head, |
if (!ccs_io_printf(head, |
473 |
"%s" KEYWORD_KEEP_DOMAIN "%s%s%s\n", no, |
"%s" KEYWORD_KEEP_DOMAIN "%s%s%s\n", no, |
474 |
program, from, ptr->domainname->name)) |
program, from, ptr->domainname->name)) |
475 |
goto out; |
goto out; |
476 |
} |
} |
477 |
return true; |
return true; |
478 |
out: |
out: |
480 |
} |
} |
481 |
|
|
482 |
/** |
/** |
483 |
* is_domain_keeper - Check whether the given program causes domain transition suppression. |
* ccs_is_domain_keeper - Check whether the given program causes domain transition suppression. |
484 |
* |
* |
485 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
486 |
* @program: The name of program. |
* @program: The name of program. |
489 |
* Returns true if executing @program supresses domain transition, |
* Returns true if executing @program supresses domain transition, |
490 |
* false otherwise. |
* false otherwise. |
491 |
*/ |
*/ |
492 |
static bool is_domain_keeper(const struct path_info *domainname, |
static bool ccs_is_domain_keeper(const struct ccs_path_info *domainname, |
493 |
const struct path_info *program, |
const struct ccs_path_info *program, |
494 |
const struct path_info *last_name) |
const struct ccs_path_info *last_name) |
495 |
{ |
{ |
496 |
struct domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *ptr; |
497 |
bool flag = false; |
bool flag = false; |
498 |
list1_for_each_entry(ptr, &domain_keeper_list, list) { |
list1_for_each_entry(ptr, &ccs_domain_keeper_list, list) { |
499 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
500 |
continue; |
continue; |
501 |
if (!ptr->is_last_name) { |
if (!ptr->is_last_name) { |
514 |
return flag; |
return flag; |
515 |
} |
} |
516 |
|
|
517 |
/* The list for "struct alias_entry". */ |
/* The list for "struct ccs_alias_entry". */ |
518 |
static LIST1_HEAD(alias_list); |
static LIST1_HEAD(ccs_alias_list); |
519 |
|
|
520 |
/** |
/** |
521 |
* update_alias_entry - Update "struct alias_entry" list. |
* ccs_update_alias_entry - Update "struct ccs_alias_entry" list. |
522 |
* |
* |
523 |
* @original_name: The original program's real name. |
* @original_name: The original program's real name. |
524 |
* @aliased_name: The symbolic program's symbolic link's name. |
* @aliased_name: The symbolic program's symbolic link's name. |
526 |
* |
* |
527 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
528 |
*/ |
*/ |
529 |
static int update_alias_entry(const char *original_name, |
static int ccs_update_alias_entry(const char *original_name, |
530 |
const char *aliased_name, |
const char *aliased_name, |
531 |
const bool is_delete) |
const bool is_delete) |
532 |
{ |
{ |
533 |
struct alias_entry *new_entry; |
struct ccs_alias_entry *new_entry; |
534 |
struct alias_entry *ptr; |
struct ccs_alias_entry *ptr; |
535 |
static DEFINE_MUTEX(lock); |
static DEFINE_MUTEX(lock); |
536 |
const struct path_info *saved_original_name; |
const struct ccs_path_info *saved_original_name; |
537 |
const struct path_info *saved_aliased_name; |
const struct ccs_path_info *saved_aliased_name; |
538 |
int error = -ENOMEM; |
int error = -ENOMEM; |
539 |
if (!ccs_is_correct_path(original_name, 1, -1, -1, __func__) || |
if (!ccs_is_correct_path(original_name, 1, -1, -1, __func__) || |
540 |
!ccs_is_correct_path(aliased_name, 1, -1, -1, __func__)) |
!ccs_is_correct_path(aliased_name, 1, -1, -1, __func__)) |
544 |
if (!saved_original_name || !saved_aliased_name) |
if (!saved_original_name || !saved_aliased_name) |
545 |
return -ENOMEM; |
return -ENOMEM; |
546 |
mutex_lock(&lock); |
mutex_lock(&lock); |
547 |
list1_for_each_entry(ptr, &alias_list, list) { |
list1_for_each_entry(ptr, &ccs_alias_list, list) { |
548 |
if (ptr->original_name != saved_original_name || |
if (ptr->original_name != saved_original_name || |
549 |
ptr->aliased_name != saved_aliased_name) |
ptr->aliased_name != saved_aliased_name) |
550 |
continue; |
continue; |
561 |
goto out; |
goto out; |
562 |
new_entry->original_name = saved_original_name; |
new_entry->original_name = saved_original_name; |
563 |
new_entry->aliased_name = saved_aliased_name; |
new_entry->aliased_name = saved_aliased_name; |
564 |
list1_add_tail_mb(&new_entry->list, &alias_list); |
list1_add_tail_mb(&new_entry->list, &ccs_alias_list); |
565 |
error = 0; |
error = 0; |
566 |
out: |
out: |
567 |
mutex_unlock(&lock); |
mutex_unlock(&lock); |
570 |
} |
} |
571 |
|
|
572 |
/** |
/** |
573 |
* ccs_read_alias_policy - Read "struct alias_entry" list. |
* ccs_read_alias_policy - Read "struct ccs_alias_entry" list. |
574 |
* |
* |
575 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
576 |
* |
* |
579 |
bool ccs_read_alias_policy(struct ccs_io_buffer *head) |
bool ccs_read_alias_policy(struct ccs_io_buffer *head) |
580 |
{ |
{ |
581 |
struct list1_head *pos; |
struct list1_head *pos; |
582 |
list1_for_each_cookie(pos, head->read_var2, &alias_list) { |
list1_for_each_cookie(pos, head->read_var2, &ccs_alias_list) { |
583 |
struct alias_entry *ptr; |
struct ccs_alias_entry *ptr; |
584 |
ptr = list1_entry(pos, struct alias_entry, list); |
ptr = list1_entry(pos, struct ccs_alias_entry, list); |
585 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
586 |
continue; |
continue; |
587 |
if (!ccs_io_printf(head, KEYWORD_ALIAS "%s %s\n", |
if (!ccs_io_printf(head, KEYWORD_ALIAS "%s %s\n", |
595 |
} |
} |
596 |
|
|
597 |
/** |
/** |
598 |
* ccs_write_alias_policy - Write "struct alias_entry" list. |
* ccs_write_alias_policy - Write "struct ccs_alias_entry" list. |
599 |
* |
* |
600 |
* @data: String to parse. |
* @data: String to parse. |
601 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
608 |
if (!cp) |
if (!cp) |
609 |
return -EINVAL; |
return -EINVAL; |
610 |
*cp++ = '\0'; |
*cp++ = '\0'; |
611 |
return update_alias_entry(data, cp, is_delete); |
return ccs_update_alias_entry(data, cp, is_delete); |
612 |
} |
} |
613 |
|
|
614 |
/* The list for "struct aggregator_entry". */ |
/* The list for "struct ccs_aggregator_entry". */ |
615 |
static LIST1_HEAD(aggregator_list); |
static LIST1_HEAD(ccs_aggregator_list); |
616 |
|
|
617 |
/** |
/** |
618 |
* update_aggregator_entry - Update "struct aggregator_entry" list. |
* ccs_update_aggregator_entry - Update "struct ccs_aggregator_entry" list. |
619 |
* |
* |
620 |
* @original_name: The original program's name. |
* @original_name: The original program's name. |
621 |
* @aggregated_name: The aggregated program's name. |
* @aggregated_name: The aggregated program's name. |
623 |
* |
* |
624 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
625 |
*/ |
*/ |
626 |
static int update_aggregator_entry(const char *original_name, |
static int ccs_update_aggregator_entry(const char *original_name, |
627 |
const char *aggregated_name, |
const char *aggregated_name, |
628 |
const bool is_delete) |
const bool is_delete) |
629 |
{ |
{ |
630 |
struct aggregator_entry *new_entry; |
struct ccs_aggregator_entry *new_entry; |
631 |
struct aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
632 |
static DEFINE_MUTEX(lock); |
static DEFINE_MUTEX(lock); |
633 |
const struct path_info *saved_original_name; |
const struct ccs_path_info *saved_original_name; |
634 |
const struct path_info *saved_aggregated_name; |
const struct ccs_path_info *saved_aggregated_name; |
635 |
int error = -ENOMEM; |
int error = -ENOMEM; |
636 |
if (!ccs_is_correct_path(original_name, 1, 0, -1, __func__) || |
if (!ccs_is_correct_path(original_name, 1, 0, -1, __func__) || |
637 |
!ccs_is_correct_path(aggregated_name, 1, -1, -1, __func__)) |
!ccs_is_correct_path(aggregated_name, 1, -1, -1, __func__)) |
641 |
if (!saved_original_name || !saved_aggregated_name) |
if (!saved_original_name || !saved_aggregated_name) |
642 |
return -ENOMEM; |
return -ENOMEM; |
643 |
mutex_lock(&lock); |
mutex_lock(&lock); |
644 |
list1_for_each_entry(ptr, &aggregator_list, list) { |
list1_for_each_entry(ptr, &ccs_aggregator_list, list) { |
645 |
if (ptr->original_name != saved_original_name || |
if (ptr->original_name != saved_original_name || |
646 |
ptr->aggregated_name != saved_aggregated_name) |
ptr->aggregated_name != saved_aggregated_name) |
647 |
continue; |
continue; |
658 |
goto out; |
goto out; |
659 |
new_entry->original_name = saved_original_name; |
new_entry->original_name = saved_original_name; |
660 |
new_entry->aggregated_name = saved_aggregated_name; |
new_entry->aggregated_name = saved_aggregated_name; |
661 |
list1_add_tail_mb(&new_entry->list, &aggregator_list); |
list1_add_tail_mb(&new_entry->list, &ccs_aggregator_list); |
662 |
error = 0; |
error = 0; |
663 |
out: |
out: |
664 |
mutex_unlock(&lock); |
mutex_unlock(&lock); |
667 |
} |
} |
668 |
|
|
669 |
/** |
/** |
670 |
* ccs_read_aggregator_policy - Read "struct aggregator_entry" list. |
* ccs_read_aggregator_policy - Read "struct ccs_aggregator_entry" list. |
671 |
* |
* |
672 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
673 |
* |
* |
676 |
bool ccs_read_aggregator_policy(struct ccs_io_buffer *head) |
bool ccs_read_aggregator_policy(struct ccs_io_buffer *head) |
677 |
{ |
{ |
678 |
struct list1_head *pos; |
struct list1_head *pos; |
679 |
list1_for_each_cookie(pos, head->read_var2, &aggregator_list) { |
list1_for_each_cookie(pos, head->read_var2, &ccs_aggregator_list) { |
680 |
struct aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
681 |
ptr = list1_entry(pos, struct aggregator_entry, list); |
ptr = list1_entry(pos, struct ccs_aggregator_entry, list); |
682 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
683 |
continue; |
continue; |
684 |
if (!ccs_io_printf(head, KEYWORD_AGGREGATOR "%s %s\n", |
if (!ccs_io_printf(head, KEYWORD_AGGREGATOR "%s %s\n", |
692 |
} |
} |
693 |
|
|
694 |
/** |
/** |
695 |
* ccs_write_aggregator_policy - Write "struct aggregator_entry" list. |
* ccs_write_aggregator_policy - Write "struct ccs_aggregator_entry" list. |
696 |
* |
* |
697 |
* @data: String to parse. |
* @data: String to parse. |
698 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
705 |
if (!cp) |
if (!cp) |
706 |
return -EINVAL; |
return -EINVAL; |
707 |
*cp++ = '\0'; |
*cp++ = '\0'; |
708 |
return update_aggregator_entry(data, cp, is_delete); |
return ccs_update_aggregator_entry(data, cp, is_delete); |
709 |
} |
} |
710 |
|
|
711 |
/* Domain create/delete/undelete handler. */ |
/* Domain create/delete handler. */ |
|
|
|
|
/* #define DEBUG_DOMAIN_UNDELETE */ |
|
712 |
|
|
713 |
/** |
/** |
714 |
* ccs_delete_domain - Delete a domain. |
* ccs_delete_domain - Delete a domain. |
719 |
*/ |
*/ |
720 |
int ccs_delete_domain(char *domainname) |
int ccs_delete_domain(char *domainname) |
721 |
{ |
{ |
722 |
struct domain_info *domain; |
struct ccs_domain_info *domain; |
723 |
struct path_info name; |
struct ccs_path_info name; |
724 |
name.name = domainname; |
name.name = domainname; |
725 |
ccs_fill_path_info(&name); |
ccs_fill_path_info(&name); |
726 |
mutex_lock(&domain_list_lock); |
mutex_lock(&ccs_domain_list_lock); |
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "ccs_delete_domain %s\n", domainname); |
|
|
list1_for_each_entry(domain, &domain_list, list) { |
|
|
if (ccs_pathcmp(domain->domainname, &name)) |
|
|
continue; |
|
|
printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted); |
|
|
} |
|
|
#endif |
|
727 |
/* Is there an active domain? */ |
/* Is there an active domain? */ |
728 |
list1_for_each_entry(domain, &domain_list, list) { |
list1_for_each_entry(domain, &ccs_domain_list, list) { |
729 |
struct domain_info *domain2; |
/* Never delete ccs_kernel_domain */ |
730 |
/* Never delete KERNEL_DOMAIN */ |
if (domain == &ccs_kernel_domain) |
|
if (domain == &KERNEL_DOMAIN) |
|
731 |
continue; |
continue; |
732 |
if (domain->is_deleted || |
if (domain->is_deleted || |
733 |
ccs_pathcmp(domain->domainname, &name)) |
ccs_pathcmp(domain->domainname, &name)) |
734 |
continue; |
continue; |
735 |
/* Mark already deleted domains as non undeletable. */ |
domain->is_deleted = true; |
|
list1_for_each_entry(domain2, &domain_list, list) { |
|
|
if (!domain2->is_deleted || |
|
|
ccs_pathcmp(domain2->domainname, &name)) |
|
|
continue; |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
if (domain2->is_deleted != 255) |
|
|
printk(KERN_DEBUG |
|
|
"Marked %p as non undeletable\n", |
|
|
domain2); |
|
|
#endif |
|
|
domain2->is_deleted = 255; |
|
|
} |
|
|
/* Delete and mark active domain as undeletable. */ |
|
|
domain->is_deleted = 1; |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "Marked %p as undeletable\n", domain); |
|
|
#endif |
|
736 |
break; |
break; |
737 |
} |
} |
738 |
mutex_unlock(&domain_list_lock); |
mutex_unlock(&ccs_domain_list_lock); |
739 |
return 0; |
return 0; |
740 |
} |
} |
741 |
|
|
742 |
/** |
/** |
|
* ccs_undelete_domain - Undelete a domain. |
|
|
* |
|
|
* @domainname: The name of domain. |
|
|
* |
|
|
* Returns pointer to "struct domain_info" on success, NULL otherwise. |
|
|
*/ |
|
|
struct domain_info *ccs_undelete_domain(const char *domainname) |
|
|
{ |
|
|
struct domain_info *domain; |
|
|
struct domain_info *candidate_domain = NULL; |
|
|
struct path_info name; |
|
|
name.name = domainname; |
|
|
ccs_fill_path_info(&name); |
|
|
mutex_lock(&domain_list_lock); |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "ccs_undelete_domain %s\n", domainname); |
|
|
list1_for_each_entry(domain, &domain_list, list) { |
|
|
if (ccs_pathcmp(domain->domainname, &name)) |
|
|
continue; |
|
|
printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted); |
|
|
} |
|
|
#endif |
|
|
list1_for_each_entry(domain, &domain_list, list) { |
|
|
if (ccs_pathcmp(&name, domain->domainname)) |
|
|
continue; |
|
|
if (!domain->is_deleted) { |
|
|
/* This domain is active. I can't undelete. */ |
|
|
candidate_domain = NULL; |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "%p is active. I can't undelete.\n", |
|
|
domain); |
|
|
#endif |
|
|
break; |
|
|
} |
|
|
/* Is this domain undeletable? */ |
|
|
if (domain->is_deleted == 1) |
|
|
candidate_domain = domain; |
|
|
} |
|
|
if (candidate_domain) { |
|
|
candidate_domain->is_deleted = 0; |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "%p was undeleted.\n", candidate_domain); |
|
|
#endif |
|
|
} |
|
|
mutex_unlock(&domain_list_lock); |
|
|
return candidate_domain; |
|
|
} |
|
|
|
|
|
/** |
|
743 |
* ccs_find_or_assign_new_domain - Create a domain. |
* ccs_find_or_assign_new_domain - Create a domain. |
744 |
* |
* |
745 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
746 |
* @profile: Profile number to assign if the domain was newly created. |
* @profile: Profile number to assign if the domain was newly created. |
747 |
* |
* |
748 |
* Returns pointer to "struct domain_info" on success, NULL otherwise. |
* Returns pointer to "struct ccs_domain_info" on success, NULL otherwise. |
749 |
*/ |
*/ |
750 |
struct domain_info *ccs_find_or_assign_new_domain(const char *domainname, |
struct ccs_domain_info *ccs_find_or_assign_new_domain(const char *domainname, |
751 |
const u8 profile) |
const u8 profile) |
752 |
{ |
{ |
753 |
struct domain_info *domain = NULL; |
struct ccs_domain_info *domain = NULL; |
754 |
const struct path_info *saved_domainname; |
const struct ccs_path_info *saved_domainname; |
755 |
mutex_lock(&domain_list_lock); |
mutex_lock(&ccs_domain_list_lock); |
756 |
domain = ccs_find_domain(domainname); |
domain = ccs_find_domain(domainname); |
757 |
if (domain) |
if (domain) |
758 |
goto out; |
goto out; |
762 |
if (!saved_domainname) |
if (!saved_domainname) |
763 |
goto out; |
goto out; |
764 |
/* Can I reuse memory of deleted domain? */ |
/* Can I reuse memory of deleted domain? */ |
765 |
list1_for_each_entry(domain, &domain_list, list) { |
list1_for_each_entry(domain, &ccs_domain_list, list) { |
766 |
struct task_struct *p; |
struct task_struct *p; |
767 |
struct acl_info *ptr; |
struct ccs_acl_info *ptr; |
768 |
bool flag; |
bool flag; |
769 |
if (!domain->is_deleted || |
if (!domain->is_deleted || |
770 |
domain->domainname != saved_domainname) |
domain->domainname != saved_domainname) |
773 |
/***** CRITICAL SECTION START *****/ |
/***** CRITICAL SECTION START *****/ |
774 |
read_lock(&tasklist_lock); |
read_lock(&tasklist_lock); |
775 |
for_each_process(p) { |
for_each_process(p) { |
776 |
if (p->domain_info != domain) |
if (ccs_task_domain(p) != domain) |
777 |
continue; |
continue; |
778 |
flag = true; |
flag = true; |
779 |
break; |
break; |
782 |
/***** CRITICAL SECTION END *****/ |
/***** CRITICAL SECTION END *****/ |
783 |
if (flag) |
if (flag) |
784 |
continue; |
continue; |
|
#ifdef DEBUG_DOMAIN_UNDELETE |
|
|
printk(KERN_DEBUG "Reusing %p %s\n", domain, |
|
|
domain->domainname->name); |
|
|
#endif |
|
785 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
786 |
ptr->type |= ACL_DELETED; |
ptr->type |= ACL_DELETED; |
787 |
} |
} |
789 |
domain->profile = profile; |
domain->profile = profile; |
790 |
domain->quota_warned = false; |
domain->quota_warned = false; |
791 |
mb(); /* Avoid out-of-order execution. */ |
mb(); /* Avoid out-of-order execution. */ |
792 |
domain->is_deleted = 0; |
domain->is_deleted = false; |
793 |
goto out; |
goto out; |
794 |
} |
} |
795 |
/* No memory reusable. Create using new memory. */ |
/* No memory reusable. Create using new memory. */ |
798 |
INIT_LIST1_HEAD(&domain->acl_info_list); |
INIT_LIST1_HEAD(&domain->acl_info_list); |
799 |
domain->domainname = saved_domainname; |
domain->domainname = saved_domainname; |
800 |
domain->profile = profile; |
domain->profile = profile; |
801 |
list1_add_tail_mb(&domain->list, &domain_list); |
list1_add_tail_mb(&domain->list, &ccs_domain_list); |
802 |
} |
} |
803 |
out: |
out: |
804 |
mutex_unlock(&domain_list_lock); |
mutex_unlock(&ccs_domain_list_lock); |
805 |
return domain; |
return domain; |
806 |
} |
} |
807 |
|
|
808 |
/** |
/** |
809 |
* get_argv0 - Get argv[0]. |
* ccs_get_argv0 - Get argv[0]. |
810 |
* |
* |
811 |
* @bprm: Pointer to "struct linux_binprm". |
* @ee: Pointer to "struct ccs_execve_entry". |
|
* @tmp: Buffer for temporal use. |
|
812 |
* |
* |
813 |
* Returns true on success, false otherwise. |
* Returns true on success, false otherwise. |
814 |
*/ |
*/ |
815 |
static bool get_argv0(struct linux_binprm *bprm, struct ccs_page_buffer *tmp) |
static bool ccs_get_argv0(struct ccs_execve_entry *ee) |
816 |
{ |
{ |
817 |
char *arg_ptr = tmp->buffer; |
struct linux_binprm *bprm = ee->bprm; |
818 |
|
char *arg_ptr = ee->tmp; |
819 |
int arg_len = 0; |
int arg_len = 0; |
820 |
unsigned long pos = bprm->p; |
unsigned long pos = bprm->p; |
|
int i = pos / PAGE_SIZE; |
|
821 |
int offset = pos % PAGE_SIZE; |
int offset = pos % PAGE_SIZE; |
822 |
bool done = false; |
bool done = false; |
823 |
if (!bprm->argc) |
if (!bprm->argc) |
824 |
goto out; |
goto out; |
825 |
while (1) { |
while (1) { |
826 |
struct page *page; |
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
|
const char *kaddr; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, |
|
|
NULL) <= 0) |
|
827 |
goto out; |
goto out; |
828 |
pos += PAGE_SIZE - offset; |
pos += PAGE_SIZE - offset; |
|
#else |
|
|
page = bprm->page[i]; |
|
|
#endif |
|
|
/* Map. */ |
|
|
kaddr = kmap(page); |
|
|
if (!kaddr) { /* Mapping failed. */ |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
put_page(page); |
|
|
#endif |
|
|
goto out; |
|
|
} |
|
829 |
/* Read. */ |
/* Read. */ |
830 |
while (offset < PAGE_SIZE) { |
while (offset < PAGE_SIZE) { |
831 |
|
const char *kaddr = ee->dump.data; |
832 |
const unsigned char c = kaddr[offset++]; |
const unsigned char c = kaddr[offset++]; |
833 |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
834 |
if (c == '\\') { |
if (c == '\\') { |
851 |
break; |
break; |
852 |
} |
} |
853 |
} |
} |
|
/* Unmap. */ |
|
|
kunmap(page); |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
put_page(page); |
|
|
#endif |
|
|
i++; |
|
854 |
offset = 0; |
offset = 0; |
855 |
if (done) |
if (done) |
856 |
break; |
break; |
861 |
} |
} |
862 |
|
|
863 |
/** |
/** |
864 |
* find_next_domain - Find a domain. |
* ccs_find_next_domain - Find a domain. |
865 |
* |
* |
866 |
* @r: Pointer to "struct ccs_request_info". |
* @ee: Pointer to "struct ccs_execve_entry". |
|
* @handler: Pathname to verify. May be NULL. |
|
867 |
* |
* |
868 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
869 |
*/ |
*/ |
870 |
static int find_next_domain(struct ccs_request_info *r, |
static int ccs_find_next_domain(struct ccs_execve_entry *ee) |
|
const struct path_info *handler) |
|
871 |
{ |
{ |
872 |
/* |
struct ccs_request_info *r = &ee->r; |
873 |
* This function assumes that the size of buffer returned by |
const struct ccs_path_info *handler = ee->handler; |
874 |
* ccs_realpath() = CCS_MAX_PATHNAME_LEN. |
struct ccs_domain_info *domain = NULL; |
|
*/ |
|
|
struct domain_info *domain = NULL; |
|
875 |
const char *old_domain_name = r->domain->domainname->name; |
const char *old_domain_name = r->domain->domainname->name; |
876 |
struct linux_binprm *bprm = r->bprm; |
struct linux_binprm *bprm = ee->bprm; |
|
struct ccs_page_buffer *tmp = r->obj->tmp; |
|
|
const char *original_name = bprm->filename; |
|
877 |
const u8 mode = r->mode; |
const u8 mode = r->mode; |
878 |
const bool is_enforce = (mode == 3); |
const bool is_enforce = (mode == 3); |
879 |
const u32 tomoyo_flags = r->tomoyo_flags; |
const u32 ccs_flags = current->ccs_flags; |
880 |
char *new_domain_name = NULL; |
char *new_domain_name = NULL; |
881 |
char *real_program_name = NULL; |
struct ccs_path_info rn; /* real name */ |
882 |
char *symlink_program_name = NULL; |
struct ccs_path_info sn; /* symlink name */ |
883 |
struct path_info rn; /* real name */ |
struct ccs_path_info ln; /* last name */ |
|
struct path_info sn; /* symlink name */ |
|
|
struct path_info ln; /* last name */ |
|
884 |
int retval; |
int retval; |
|
|
|
|
{ |
|
|
/* |
|
|
* Built-in initializers. This is needed because policies are |
|
|
* not loaded until starting /sbin/init. |
|
|
*/ |
|
|
static bool first = true; |
|
|
if (first) { |
|
|
update_domain_initializer_entry(NULL, "/sbin/hotplug", |
|
|
false, false); |
|
|
update_domain_initializer_entry(NULL, "/sbin/modprobe", |
|
|
false, false); |
|
|
first = false; |
|
|
} |
|
|
} |
|
|
|
|
885 |
retry: |
retry: |
886 |
current->tomoyo_flags = tomoyo_flags; |
current->ccs_flags = ccs_flags; |
887 |
r->tomoyo_flags = tomoyo_flags; |
r->cond = NULL; |
888 |
/* Get ccs_realpath of program. */ |
/* Get realpath of program and symbolic link. */ |
889 |
retval = -ENOENT; /* I hope ccs_realpath() won't fail with -ENOMEM. */ |
retval = ccs_realpath_both(bprm->filename, ee); |
890 |
ccs_free(real_program_name); |
if (retval < 0) |
|
real_program_name = ccs_realpath(original_name); |
|
|
if (!real_program_name) |
|
|
goto out; |
|
|
/* Get ccs_realpath of symbolic link. */ |
|
|
ccs_free(symlink_program_name); |
|
|
symlink_program_name = ccs_realpath_nofollow(original_name); |
|
|
if (!symlink_program_name) |
|
891 |
goto out; |
goto out; |
892 |
|
|
893 |
rn.name = real_program_name; |
rn.name = ee->program_path; |
894 |
ccs_fill_path_info(&rn); |
ccs_fill_path_info(&rn); |
895 |
sn.name = symlink_program_name; |
sn.name = ee->tmp; |
896 |
ccs_fill_path_info(&sn); |
ccs_fill_path_info(&sn); |
897 |
ln.name = ccs_get_last_name(r->domain); |
ln.name = ccs_get_last_name(r->domain); |
898 |
ccs_fill_path_info(&ln); |
ccs_fill_path_info(&ln); |
913 |
|
|
914 |
/* Check 'alias' directive. */ |
/* Check 'alias' directive. */ |
915 |
if (ccs_pathcmp(&rn, &sn)) { |
if (ccs_pathcmp(&rn, &sn)) { |
916 |
struct alias_entry *ptr; |
struct ccs_alias_entry *ptr; |
917 |
/* Is this program allowed to be called via symbolic links? */ |
/* Is this program allowed to be called via symbolic links? */ |
918 |
list1_for_each_entry(ptr, &alias_list, list) { |
list1_for_each_entry(ptr, &ccs_alias_list, list) { |
919 |
if (ptr->is_deleted || |
if (ptr->is_deleted || |
920 |
ccs_pathcmp(&rn, ptr->original_name) || |
ccs_pathcmp(&rn, ptr->original_name) || |
921 |
ccs_pathcmp(&sn, ptr->aliased_name)) |
ccs_pathcmp(&sn, ptr->aliased_name)) |
922 |
continue; |
continue; |
923 |
memset(real_program_name, 0, CCS_MAX_PATHNAME_LEN); |
strncpy(ee->program_path, ptr->aliased_name->name, |
|
strncpy(real_program_name, ptr->aliased_name->name, |
|
924 |
CCS_MAX_PATHNAME_LEN - 1); |
CCS_MAX_PATHNAME_LEN - 1); |
925 |
ccs_fill_path_info(&rn); |
ccs_fill_path_info(&rn); |
926 |
break; |
break; |
927 |
} |
} |
928 |
} |
} |
929 |
|
/* sn will be overwritten after here. */ |
930 |
|
|
931 |
/* Compare basename of real_program_name and argv[0] */ |
/* Compare basename of program_path and argv[0] */ |
932 |
r->mode = ccs_check_flags(r->domain, CCS_TOMOYO_MAC_FOR_ARGV0); |
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_ARGV0); |
933 |
if (bprm->argc > 0 && r->mode) { |
if (bprm->argc > 0 && r->mode) { |
934 |
char *base_argv0 = tmp->buffer; |
char *base_argv0 = ee->tmp; |
935 |
const char *base_filename; |
const char *base_filename; |
936 |
retval = -ENOMEM; |
retval = -ENOMEM; |
937 |
if (!get_argv0(bprm, tmp)) |
if (!ccs_get_argv0(ee)) |
938 |
goto out; |
goto out; |
939 |
base_filename = strrchr(real_program_name, '/'); |
base_filename = strrchr(ee->program_path, '/'); |
940 |
if (!base_filename) |
if (!base_filename) |
941 |
base_filename = real_program_name; |
base_filename = ee->program_path; |
942 |
else |
else |
943 |
base_filename++; |
base_filename++; |
944 |
if (strcmp(base_argv0, base_filename)) { |
if (strcmp(base_argv0, base_filename)) { |
945 |
retval = ccs_check_argv0_perm(r, &rn, base_argv0); |
retval = ccs_check_argv0_perm(r, &rn, base_argv0); |
946 |
if (retval == 1) { |
if (retval == 1) |
|
r->retry++; |
|
947 |
goto retry; |
goto retry; |
|
} |
|
|
r->retry = 0; |
|
|
r->tomoyo_flags = current->tomoyo_flags; |
|
948 |
if (retval < 0) |
if (retval < 0) |
949 |
goto out; |
goto out; |
950 |
} |
} |
952 |
|
|
953 |
/* Check 'aggregator' directive. */ |
/* Check 'aggregator' directive. */ |
954 |
{ |
{ |
955 |
struct aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
956 |
/* Is this program allowed to be aggregated? */ |
/* Is this program allowed to be aggregated? */ |
957 |
list1_for_each_entry(ptr, &aggregator_list, list) { |
list1_for_each_entry(ptr, &ccs_aggregator_list, list) { |
958 |
if (ptr->is_deleted || |
if (ptr->is_deleted || |
959 |
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
960 |
continue; |
continue; |
961 |
memset(real_program_name, 0, CCS_MAX_PATHNAME_LEN); |
strncpy(ee->program_path, ptr->aggregated_name->name, |
|
strncpy(real_program_name, ptr->aggregated_name->name, |
|
962 |
CCS_MAX_PATHNAME_LEN - 1); |
CCS_MAX_PATHNAME_LEN - 1); |
963 |
ccs_fill_path_info(&rn); |
ccs_fill_path_info(&rn); |
964 |
break; |
break; |
968 |
/* Check execute permission. */ |
/* Check execute permission. */ |
969 |
r->mode = mode; |
r->mode = mode; |
970 |
retval = ccs_check_exec_perm(r, &rn); |
retval = ccs_check_exec_perm(r, &rn); |
971 |
if (retval == 1) { |
if (retval == 1) |
|
r->retry++; |
|
972 |
goto retry; |
goto retry; |
|
} |
|
|
r->retry = 0; |
|
|
r->tomoyo_flags = current->tomoyo_flags; |
|
973 |
if (retval < 0) |
if (retval < 0) |
974 |
goto out; |
goto out; |
975 |
|
|
976 |
calculate_domain: |
calculate_domain: |
977 |
new_domain_name = tmp->buffer; |
new_domain_name = ee->tmp; |
978 |
if (is_domain_initializer(r->domain->domainname, &rn, &ln)) { |
if (ccs_is_domain_initializer(r->domain->domainname, &rn, &ln)) { |
979 |
/* Transit to the child of KERNEL_DOMAIN domain. */ |
/* Transit to the child of ccs_kernel_domain domain. */ |
980 |
snprintf(new_domain_name, CCS_MAX_PATHNAME_LEN + 1, |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
981 |
ROOT_NAME " " "%s", real_program_name); |
ROOT_NAME " " "%s", ee->program_path); |
982 |
} else if (r->domain == &KERNEL_DOMAIN && !sbin_init_started) { |
} else if (r->domain == &ccs_kernel_domain && !ccs_policy_loaded) { |
983 |
/* |
/* |
984 |
* Needn't to transit from kernel domain before starting |
* Needn't to transit from kernel domain before starting |
985 |
* /sbin/init. But transit from kernel domain if executing |
* /sbin/init. But transit from kernel domain if executing |
986 |
* initializers because they might start before /sbin/init. |
* initializers because they might start before /sbin/init. |
987 |
*/ |
*/ |
988 |
domain = r->domain; |
domain = r->domain; |
989 |
} else if (is_domain_keeper(r->domain->domainname, &rn, &ln)) { |
} else if (ccs_is_domain_keeper(r->domain->domainname, &rn, &ln)) { |
990 |
/* Keep current domain. */ |
/* Keep current domain. */ |
991 |
domain = r->domain; |
domain = r->domain; |
992 |
} else { |
} else { |
993 |
/* Normal domain transition. */ |
/* Normal domain transition. */ |
994 |
snprintf(new_domain_name, CCS_MAX_PATHNAME_LEN + 1, |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
995 |
"%s %s", old_domain_name, real_program_name); |
"%s %s", old_domain_name, ee->program_path); |
996 |
} |
} |
997 |
if (domain || strlen(new_domain_name) >= CCS_MAX_PATHNAME_LEN) |
if (domain || strlen(new_domain_name) >= CCS_MAX_PATHNAME_LEN) |
998 |
goto done; |
goto done; |
1003 |
int error = ccs_check_supervisor(r, |
int error = ccs_check_supervisor(r, |
1004 |
"# wants to create domain\n" |
"# wants to create domain\n" |
1005 |
"%s\n", new_domain_name); |
"%s\n", new_domain_name); |
1006 |
if (error == 1) { |
if (error == 1) |
|
r->retry++; |
|
1007 |
goto retry; |
goto retry; |
|
} |
|
|
r->retry = 0; |
|
1008 |
if (error < 0) |
if (error < 0) |
1009 |
goto done; |
goto done; |
1010 |
} |
} |
1011 |
domain = ccs_find_or_assign_new_domain(new_domain_name, r->profile); |
domain = ccs_find_or_assign_new_domain(new_domain_name, r->profile); |
1012 |
if (domain) |
if (domain) |
1013 |
audit_domain_creation_log(domain); |
ccs_audit_domain_creation_log(domain); |
1014 |
done: |
done: |
1015 |
if (!domain) { |
if (!domain) { |
1016 |
printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", |
printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", |
1026 |
retval = 0; |
retval = 0; |
1027 |
} |
} |
1028 |
out: |
out: |
|
ccs_free(real_program_name); |
|
|
ccs_free(symlink_program_name); |
|
1029 |
if (domain) |
if (domain) |
1030 |
r->domain = domain; |
r->domain = domain; |
1031 |
return retval; |
return retval; |
1032 |
} |
} |
1033 |
|
|
1034 |
/** |
/** |
1035 |
* check_environ - Check permission for environment variable names. |
* ccs_check_environ - Check permission for environment variable names. |
1036 |
* |
* |
1037 |
* @r: Pointer to "struct ccs_request_info". |
* @ee: Pointer to "struct ccs_execve_entry". |
1038 |
* |
* |
1039 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
1040 |
*/ |
*/ |
1041 |
static int check_environ(struct ccs_request_info *r) |
static int ccs_check_environ(struct ccs_execve_entry *ee) |
1042 |
{ |
{ |
1043 |
struct linux_binprm *bprm = r->bprm; |
struct ccs_request_info *r = &ee->r; |
1044 |
struct ccs_page_buffer *tmp = r->obj->tmp; |
struct linux_binprm *bprm = ee->bprm; |
1045 |
char *arg_ptr = tmp->buffer; |
char *arg_ptr = ee->tmp; |
1046 |
int arg_len = 0; |
int arg_len = 0; |
1047 |
unsigned long pos = bprm->p; |
unsigned long pos = bprm->p; |
|
int i = pos / PAGE_SIZE; |
|
1048 |
int offset = pos % PAGE_SIZE; |
int offset = pos % PAGE_SIZE; |
1049 |
int argv_count = bprm->argc; |
int argv_count = bprm->argc; |
1050 |
int envp_count = bprm->envc; |
int envp_count = bprm->envc; |
1053 |
if (!r->mode || !envp_count) |
if (!r->mode || !envp_count) |
1054 |
return 0; |
return 0; |
1055 |
while (error == -ENOMEM) { |
while (error == -ENOMEM) { |
1056 |
struct page *page; |
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
|
const char *kaddr; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, |
|
|
NULL) <= 0) |
|
1057 |
goto out; |
goto out; |
1058 |
pos += PAGE_SIZE - offset; |
pos += PAGE_SIZE - offset; |
|
#else |
|
|
page = bprm->page[i]; |
|
|
#endif |
|
|
/* Map. */ |
|
|
kaddr = kmap(page); |
|
|
if (!kaddr) { /* Mapping failed. */ |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
put_page(page); |
|
|
#endif |
|
|
goto out; |
|
|
} |
|
1059 |
/* Read. */ |
/* Read. */ |
1060 |
while (argv_count && offset < PAGE_SIZE) { |
while (argv_count && offset < PAGE_SIZE) { |
1061 |
|
const char *kaddr = ee->dump.data; |
1062 |
if (!kaddr[offset++]) |
if (!kaddr[offset++]) |
1063 |
argv_count--; |
argv_count--; |
1064 |
} |
} |
1065 |
if (argv_count) |
if (argv_count) { |
1066 |
goto unmap_page; |
offset = 0; |
1067 |
|
continue; |
1068 |
|
} |
1069 |
while (offset < PAGE_SIZE) { |
while (offset < PAGE_SIZE) { |
1070 |
|
const char *kaddr = ee->dump.data; |
1071 |
const unsigned char c = kaddr[offset++]; |
const unsigned char c = kaddr[offset++]; |
1072 |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
1073 |
if (c == '=') { |
if (c == '=') { |
1099 |
} |
} |
1100 |
arg_len = 0; |
arg_len = 0; |
1101 |
} |
} |
|
unmap_page: |
|
|
/* Unmap. */ |
|
|
kunmap(page); |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
|
|
put_page(page); |
|
|
#endif |
|
|
i++; |
|
1102 |
offset = 0; |
offset = 0; |
1103 |
} |
} |
1104 |
out: |
out: |
1108 |
} |
} |
1109 |
|
|
1110 |
/** |
/** |
1111 |
* unescape - Unescape escaped string. |
* ccs_unescape - Unescape escaped string. |
1112 |
* |
* |
1113 |
* @dest: String to unescape. |
* @dest: String to unescape. |
1114 |
* |
* |
1115 |
* Returns nothing. |
* Returns nothing. |
1116 |
*/ |
*/ |
1117 |
static void unescape(unsigned char *dest) |
static void ccs_unescape(unsigned char *dest) |
1118 |
{ |
{ |
1119 |
unsigned char *src = dest; |
unsigned char *src = dest; |
1120 |
unsigned char c; |
unsigned char c; |
1121 |
unsigned char d; |
unsigned char d; |
1122 |
unsigned char e; |
unsigned char e; |
1123 |
while ((c = *src++) != '\0') { |
while (1) { |
1124 |
|
c = *src++; |
1125 |
|
if (!c) |
1126 |
|
break; |
1127 |
if (c != '\\') { |
if (c != '\\') { |
1128 |
*dest++ = c; |
*dest++ = c; |
1129 |
continue; |
continue; |
1147 |
} |
} |
1148 |
|
|
1149 |
/** |
/** |
1150 |
* root_depth - Get number of directories to strip. |
* ccs_root_depth - Get number of directories to strip. |
1151 |
* |
* |
1152 |
* @dentry: Pointer to "struct dentry". |
* @dentry: Pointer to "struct dentry". |
1153 |
* @vfsmnt: Pointer to "struct vfsmount". |
* @vfsmnt: Pointer to "struct vfsmount". |
1154 |
* |
* |
1155 |
* Returns number of directories to strip. |
* Returns number of directories to strip. |
1156 |
*/ |
*/ |
1157 |
static inline int root_depth(struct dentry *dentry, struct vfsmount *vfsmnt) |
static inline int ccs_root_depth(struct dentry *dentry, struct vfsmount *vfsmnt) |
1158 |
{ |
{ |
1159 |
int depth = 0; |
int depth = 0; |
1160 |
/***** CRITICAL SECTION START *****/ |
/***** CRITICAL SECTION START *****/ |
1177 |
} |
} |
1178 |
|
|
1179 |
/** |
/** |
1180 |
* get_root_depth - return the depth of root directory. |
* ccs_get_root_depth - return the depth of root directory. |
1181 |
* |
* |
1182 |
* Returns number of directories to strip. |
* Returns number of directories to strip. |
1183 |
*/ |
*/ |
1184 |
static int get_root_depth(void) |
static int ccs_get_root_depth(void) |
1185 |
{ |
{ |
1186 |
int depth; |
int depth; |
1187 |
struct dentry *dentry; |
struct dentry *dentry; |
1202 |
#endif |
#endif |
1203 |
read_unlock(¤t->fs->lock); |
read_unlock(¤t->fs->lock); |
1204 |
/***** CRITICAL SECTION END *****/ |
/***** CRITICAL SECTION END *****/ |
1205 |
depth = root_depth(dentry, vfsmnt); |
depth = ccs_root_depth(dentry, vfsmnt); |
1206 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
1207 |
path_put(&root); |
path_put(&root); |
1208 |
#else |
#else |
1212 |
return depth; |
return depth; |
1213 |
} |
} |
1214 |
|
|
1215 |
|
static LIST_HEAD(ccs_execve_list); |
1216 |
|
static DEFINE_SPINLOCK(ccs_execve_list_lock); |
1217 |
|
|
1218 |
|
/** |
1219 |
|
* ccs_allocate_execve_entry - Allocate memory for execve(). |
1220 |
|
* |
1221 |
|
* Returns pointer to "struct ccs_execve_entry" on success, NULL otherwise. |
1222 |
|
*/ |
1223 |
|
static struct ccs_execve_entry *ccs_allocate_execve_entry(void) |
1224 |
|
{ |
1225 |
|
struct ccs_execve_entry *ee = ccs_alloc(sizeof(*ee), false); |
1226 |
|
if (!ee) |
1227 |
|
return NULL; |
1228 |
|
memset(ee, 0, sizeof(*ee)); |
1229 |
|
ee->program_path = ccs_alloc(CCS_MAX_PATHNAME_LEN, false); |
1230 |
|
ee->tmp = ccs_alloc(CCS_MAX_PATHNAME_LEN, false); |
1231 |
|
if (!ee->program_path || !ee->tmp) { |
1232 |
|
ccs_free(ee->program_path); |
1233 |
|
ccs_free(ee->tmp); |
1234 |
|
ccs_free(ee); |
1235 |
|
return NULL; |
1236 |
|
} |
1237 |
|
/* ee->dump->data is allocated by ccs_dump_page(). */ |
1238 |
|
ee->task = current; |
1239 |
|
/***** CRITICAL SECTION START *****/ |
1240 |
|
spin_lock(&ccs_execve_list_lock); |
1241 |
|
list_add(&ee->list, &ccs_execve_list); |
1242 |
|
spin_unlock(&ccs_execve_list_lock); |
1243 |
|
/***** CRITICAL SECTION END *****/ |
1244 |
|
return ee; |
1245 |
|
} |
1246 |
|
|
1247 |
|
/** |
1248 |
|
* ccs_find_execve_entry - Find ccs_execve_entry of current process. |
1249 |
|
* |
1250 |
|
* Returns pointer to "struct ccs_execve_entry" on success, NULL otherwise. |
1251 |
|
*/ |
1252 |
|
static struct ccs_execve_entry *ccs_find_execve_entry(void) |
1253 |
|
{ |
1254 |
|
struct task_struct *task = current; |
1255 |
|
struct ccs_execve_entry *ee = NULL; |
1256 |
|
struct ccs_execve_entry *p; |
1257 |
|
/***** CRITICAL SECTION START *****/ |
1258 |
|
spin_lock(&ccs_execve_list_lock); |
1259 |
|
list_for_each_entry(p, &ccs_execve_list, list) { |
1260 |
|
if (p->task != task) |
1261 |
|
continue; |
1262 |
|
ee = p; |
1263 |
|
break; |
1264 |
|
} |
1265 |
|
spin_unlock(&ccs_execve_list_lock); |
1266 |
|
/***** CRITICAL SECTION END *****/ |
1267 |
|
return ee; |
1268 |
|
} |
1269 |
|
|
1270 |
|
/** |
1271 |
|
* ccs_free_execve_entry - Free memory for execve(). |
1272 |
|
* |
1273 |
|
* @ee: Pointer to "struct ccs_execve_entry". |
1274 |
|
*/ |
1275 |
|
static void ccs_free_execve_entry(struct ccs_execve_entry *ee) |
1276 |
|
{ |
1277 |
|
if (!ee) |
1278 |
|
return; |
1279 |
|
/***** CRITICAL SECTION START *****/ |
1280 |
|
spin_lock(&ccs_execve_list_lock); |
1281 |
|
list_del(&ee->list); |
1282 |
|
spin_unlock(&ccs_execve_list_lock); |
1283 |
|
/***** CRITICAL SECTION END *****/ |
1284 |
|
ccs_free(ee->program_path); |
1285 |
|
ccs_free(ee->tmp); |
1286 |
|
kfree(ee->dump.data); |
1287 |
|
ccs_free(ee); |
1288 |
|
} |
1289 |
|
|
1290 |
/** |
/** |
1291 |
* try_alt_exec - Try to start execute handler. |
* ccs_try_alt_exec - Try to start execute handler. |
1292 |
* |
* |
1293 |
* @r: Pointer to "struct ccs_request_info". |
* @ee: Pointer to "struct ccs_execve_entry". |
|
* @handler: Pointer to the name of execute handler. |
|
|
* @eh_path: Pointer to pointer to the name of execute handler. |
|
1294 |
* |
* |
1295 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
1296 |
*/ |
*/ |
1297 |
static int try_alt_exec(struct ccs_request_info *r, |
static int ccs_try_alt_exec(struct ccs_execve_entry *ee) |
|
const struct path_info *handler, char **eh_path) |
|
1298 |
{ |
{ |
1299 |
/* |
/* |
1300 |
* Contents of modified bprm. |
* Contents of modified bprm. |
1310 |
* modified bprm->argv[0] |
* modified bprm->argv[0] |
1311 |
* = the program's name specified by execute_handler |
* = the program's name specified by execute_handler |
1312 |
* modified bprm->argv[1] |
* modified bprm->argv[1] |
1313 |
* = current->domain_info->domainname->name |
* = ccs_current_domain()->domainname->name |
1314 |
* modified bprm->argv[2] |
* modified bprm->argv[2] |
1315 |
* = the current process's name |
* = the current process's name |
1316 |
* modified bprm->argv[3] |
* modified bprm->argv[3] |
1332 |
* modified bprm->argv[bprm->envc + bprm->argc + 6] |
* modified bprm->argv[bprm->envc + bprm->argc + 6] |
1333 |
* = original bprm->envp[bprm->envc - 1] |
* = original bprm->envp[bprm->envc - 1] |
1334 |
*/ |
*/ |
1335 |
struct linux_binprm *bprm = r->bprm; |
struct linux_binprm *bprm = ee->bprm; |
1336 |
struct file *filp; |
struct file *filp; |
1337 |
int retval; |
int retval; |
1338 |
const int original_argc = bprm->argc; |
const int original_argc = bprm->argc; |
1339 |
const int original_envc = bprm->envc; |
const int original_envc = bprm->envc; |
1340 |
struct task_struct *task = current; |
struct task_struct *task = current; |
|
char *buffer = r->obj->tmp->buffer; |
|
|
/* Allocate memory for execute handler's pathname. */ |
|
|
char *execute_handler = ccs_alloc(sizeof(struct ccs_page_buffer)); |
|
|
*eh_path = execute_handler; |
|
|
if (!execute_handler) |
|
|
return -ENOMEM; |
|
|
strncpy(execute_handler, handler->name, |
|
|
sizeof(struct ccs_page_buffer) - 1); |
|
|
unescape(execute_handler); |
|
1341 |
|
|
1342 |
/* Close the requested program's dentry. */ |
/* Close the requested program's dentry. */ |
1343 |
allow_write_access(bprm->file); |
allow_write_access(bprm->file); |
1344 |
fput(bprm->file); |
fput(bprm->file); |
1345 |
bprm->file = NULL; |
bprm->file = NULL; |
1346 |
|
|
1347 |
{ /* Adjust root directory for open_exec(). */ |
/* Invalidate page dump cache. */ |
1348 |
int depth = get_root_depth(); |
ee->dump.page = NULL; |
|
char *cp = execute_handler; |
|
|
if (!*cp || *cp != '/') |
|
|
return -ENOENT; |
|
|
while (depth) { |
|
|
cp = strchr(cp + 1, '/'); |
|
|
if (!cp) |
|
|
return -ENOENT; |
|
|
depth--; |
|
|
} |
|
|
memmove(execute_handler, cp, strlen(cp) + 1); |
|
|
} |
|
1349 |
|
|
1350 |
/* Move envp[] to argv[] */ |
/* Move envp[] to argv[] */ |
1351 |
bprm->argc += bprm->envc; |
bprm->argc += bprm->envc; |
1353 |
|
|
1354 |
/* Set argv[6] */ |
/* Set argv[6] */ |
1355 |
{ |
{ |
1356 |
snprintf(buffer, sizeof(struct ccs_page_buffer) - 1, "%d", |
char *cp = ee->tmp; |
1357 |
original_envc); |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_envc); |
1358 |
retval = copy_strings_kernel(1, &buffer, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
1359 |
if (retval < 0) |
if (retval < 0) |
1360 |
goto out; |
goto out; |
1361 |
bprm->argc++; |
bprm->argc++; |
1363 |
|
|
1364 |
/* Set argv[5] */ |
/* Set argv[5] */ |
1365 |
{ |
{ |
1366 |
snprintf(buffer, sizeof(struct ccs_page_buffer) - 1, "%d", |
char *cp = ee->tmp; |
1367 |
original_argc); |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%d", original_argc); |
1368 |
retval = copy_strings_kernel(1, &buffer, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
1369 |
if (retval < 0) |
if (retval < 0) |
1370 |
goto out; |
goto out; |
1371 |
bprm->argc++; |
bprm->argc++; |
1381 |
|
|
1382 |
/* Set argv[3] */ |
/* Set argv[3] */ |
1383 |
{ |
{ |
1384 |
const u32 tomoyo_flags = task->tomoyo_flags; |
char *cp = ee->tmp; |
1385 |
snprintf(buffer, sizeof(struct ccs_page_buffer) - 1, |
const u32 ccs_flags = task->ccs_flags; |
1386 |
|
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, |
1387 |
"pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d " |
"pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d " |
1388 |
"sgid=%d fsuid=%d fsgid=%d state[0]=%u " |
"sgid=%d fsuid=%d fsgid=%d state[0]=%u " |
1389 |
"state[1]=%u state[2]=%u", |
"state[1]=%u state[2]=%u", |
1390 |
task->pid, task->uid, task->gid, task->euid, |
(pid_t) sys_getpid(), current_uid(), current_gid(), |
1391 |
task->egid, task->suid, task->sgid, task->fsuid, |
current_euid(), current_egid(), current_suid(), |
1392 |
task->fsgid, (u8) (tomoyo_flags >> 24), |
current_sgid(), current_fsuid(), current_fsgid(), |
1393 |
(u8) (tomoyo_flags >> 16), (u8) (tomoyo_flags >> 8)); |
(u8) (ccs_flags >> 24), (u8) (ccs_flags >> 16), |
1394 |
retval = copy_strings_kernel(1, &buffer, bprm); |
(u8) (ccs_flags >> 8)); |
1395 |
|
retval = copy_strings_kernel(1, &cp, bprm); |
1396 |
if (retval < 0) |
if (retval < 0) |
1397 |
goto out; |
goto out; |
1398 |
bprm->argc++; |
bprm->argc++; |
1405 |
retval = copy_strings_kernel(1, &exe, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
1406 |
ccs_free(exe); |
ccs_free(exe); |
1407 |
} else { |
} else { |
1408 |
snprintf(buffer, sizeof(struct ccs_page_buffer) - 1, |
exe = ee->tmp; |
1409 |
"<unknown>"); |
strncpy(ee->tmp, "<unknown>", CCS_EXEC_TMPSIZE - 1); |
1410 |
retval = copy_strings_kernel(1, &buffer, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
1411 |
} |
} |
1412 |
if (retval < 0) |
if (retval < 0) |
1413 |
goto out; |
goto out; |
1416 |
|
|
1417 |
/* Set argv[1] */ |
/* Set argv[1] */ |
1418 |
{ |
{ |
1419 |
strncpy(buffer, task->domain_info->domainname->name, |
char *cp = ee->tmp; |
1420 |
sizeof(struct ccs_page_buffer) - 1); |
strncpy(ee->tmp, ccs_current_domain()->domainname->name, |
1421 |
retval = copy_strings_kernel(1, &buffer, bprm); |
CCS_EXEC_TMPSIZE - 1); |
1422 |
|
retval = copy_strings_kernel(1, &cp, bprm); |
1423 |
if (retval < 0) |
if (retval < 0) |
1424 |
goto out; |
goto out; |
1425 |
bprm->argc++; |
bprm->argc++; |
1427 |
|
|
1428 |
/* Set argv[0] */ |
/* Set argv[0] */ |
1429 |
{ |
{ |
1430 |
retval = copy_strings_kernel(1, &execute_handler, bprm); |
int depth = ccs_get_root_depth(); |
1431 |
|
char *cp = ee->program_path; |
1432 |
|
strncpy(cp, ee->handler->name, CCS_MAX_PATHNAME_LEN - 1); |
1433 |
|
ccs_unescape(cp); |
1434 |
|
retval = -ENOENT; |
1435 |
|
if (!*cp || *cp != '/') |
1436 |
|
goto out; |
1437 |
|
/* Adjust root directory for open_exec(). */ |
1438 |
|
while (depth) { |
1439 |
|
cp = strchr(cp + 1, '/'); |
1440 |
|
if (!cp) |
1441 |
|
goto out; |
1442 |
|
depth--; |
1443 |
|
} |
1444 |
|
memmove(ee->program_path, cp, strlen(cp) + 1); |
1445 |
|
cp = ee->program_path; |
1446 |
|
retval = copy_strings_kernel(1, &cp, bprm); |
1447 |
if (retval < 0) |
if (retval < 0) |
1448 |
goto out; |
goto out; |
1449 |
bprm->argc++; |
bprm->argc++; |
1455 |
#endif |
#endif |
1456 |
|
|
1457 |
/* OK, now restart the process with execute handler program's dentry. */ |
/* OK, now restart the process with execute handler program's dentry. */ |
1458 |
filp = open_exec(execute_handler); |
filp = open_exec(ee->program_path); |
1459 |
if (IS_ERR(filp)) { |
if (IS_ERR(filp)) { |
1460 |
retval = PTR_ERR(filp); |
retval = PTR_ERR(filp); |
1461 |
goto out; |
goto out; |
1462 |
} |
} |
1463 |
bprm->file = filp; |
bprm->file = filp; |
1464 |
bprm->filename = execute_handler; |
bprm->filename = ee->program_path; |
1465 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
1466 |
bprm->interp = execute_handler; |
bprm->interp = bprm->filename; |
1467 |
#endif |
#endif |
1468 |
retval = prepare_binprm(bprm); |
retval = prepare_binprm(bprm); |
1469 |
if (retval < 0) |
if (retval < 0) |
1470 |
goto out; |
goto out; |
1471 |
task->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
{ |
1472 |
retval = find_next_domain(r, handler); |
/* |
1473 |
task->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
* Backup ee->program_path because ccs_find_next_domain() will |
1474 |
|
* overwrite ee->program_path and ee->tmp. |
1475 |
|
*/ |
1476 |
|
const int len = strlen(ee->program_path) + 1; |
1477 |
|
char *cp = kmalloc(len, GFP_KERNEL); |
1478 |
|
if (!cp) { |
1479 |
|
retval = -ENOMEM; |
1480 |
|
goto out; |
1481 |
|
} |
1482 |
|
memmove(cp, ee->program_path, len); |
1483 |
|
bprm->filename = cp; |
1484 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
1485 |
|
bprm->interp = bprm->filename; |
1486 |
|
#endif |
1487 |
|
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1488 |
|
retval = ccs_find_next_domain(ee); |
1489 |
|
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1490 |
|
/* Restore ee->program_path for search_binary_handler(). */ |
1491 |
|
memmove(ee->program_path, cp, len); |
1492 |
|
bprm->filename = ee->program_path; |
1493 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
1494 |
|
bprm->interp = bprm->filename; |
1495 |
|
#endif |
1496 |
|
kfree(cp); |
1497 |
|
} |
1498 |
out: |
out: |
1499 |
return retval; |
return retval; |
1500 |
} |
} |
1501 |
|
|
1502 |
/** |
/** |
1503 |
* find_execute_handler - Find an execute handler. |
* ccs_find_execute_handler - Find an execute handler. |
1504 |
* |
* |
1505 |
|
* @ee: Pointer to "struct ccs_execve_entry". |
1506 |
* @type: Type of execute handler. |
* @type: Type of execute handler. |
1507 |
* |
* |
1508 |
* Returns pointer to "struct path_info" if found, NULL otherwise. |
* Returns true if found, false otherwise. |
1509 |
*/ |
*/ |
1510 |
static const struct path_info *find_execute_handler(const u8 type) |
static bool ccs_find_execute_handler(struct ccs_execve_entry *ee, |
1511 |
|
const u8 type) |
1512 |
{ |
{ |
1513 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1514 |
const struct domain_info *domain = task->domain_info; |
const struct ccs_domain_info *domain = ccs_current_domain(); |
1515 |
struct acl_info *ptr; |
struct ccs_acl_info *ptr; |
1516 |
/* |
/* |
1517 |
* Don't use execute handler if the current process is |
* Don't use execute handler if the current process is |
1518 |
* marked as execute handler to avoid infinite execute handler loop. |
* marked as execute handler to avoid infinite execute handler loop. |
1519 |
*/ |
*/ |
1520 |
if (task->tomoyo_flags & TOMOYO_TASK_IS_EXECUTE_HANDLER) |
if (task->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) |
1521 |
return NULL; |
return false; |
1522 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
1523 |
struct execute_handler_record *acl; |
struct ccs_execute_handler_record *acl; |
1524 |
if (ptr->type != type) |
if (ptr->type != type) |
1525 |
continue; |
continue; |
1526 |
acl = container_of(ptr, struct execute_handler_record, head); |
acl = container_of(ptr, struct ccs_execute_handler_record, |
1527 |
return acl->handler; |
head); |
1528 |
|
ee->handler = acl->handler; |
1529 |
|
return true; |
1530 |
} |
} |
1531 |
return NULL; |
return false; |
1532 |
} |
} |
1533 |
|
|
|
/* List of next_domain which is used for checking interpreter's permissions. */ |
|
|
struct execve_entry { |
|
|
struct list_head list; |
|
|
struct task_struct *task; |
|
|
struct domain_info *next_domain; |
|
|
}; |
|
|
|
|
|
static LIST_HEAD(execve_list); |
|
|
static DEFINE_SPINLOCK(execve_list_lock); |
|
|
|
|
1534 |
/** |
/** |
1535 |
* ccs_register_next_domain - Remember next_domain. |
* ccs_dump_page - Dump a page to buffer. |
1536 |
* |
* |
1537 |
* @next_domain: Pointer to "struct domain_info". |
* @bprm: Pointer to "struct linux_binprm". |
1538 |
|
* @pos: Location to dump. |
1539 |
|
* @dump: Poiner to "struct ccs_page_dump". |
1540 |
* |
* |
1541 |
* Returns 0 on success, -ENOMEM otherwise. |
* Returns true on success, false otherwise. |
1542 |
*/ |
*/ |
1543 |
static int ccs_register_next_domain(struct domain_info *next_domain) |
bool ccs_dump_page(struct linux_binprm *bprm, unsigned long pos, |
1544 |
|
struct ccs_page_dump *dump) |
1545 |
{ |
{ |
1546 |
struct execve_entry *ee = kmalloc(sizeof(*ee), GFP_KERNEL); |
struct page *page; |
1547 |
if (!ee) |
/* dump->data is released by ccs_free_execve_entry(). */ |
1548 |
return -ENOMEM; |
if (!dump->data) { |
1549 |
ee->task = current; |
dump->data = kmalloc(PAGE_SIZE, GFP_KERNEL); |
1550 |
ee->next_domain = next_domain; |
if (!dump->data) |
1551 |
/***** CRITICAL SECTION START *****/ |
return false; |
1552 |
spin_lock(&execve_list_lock); |
} |
1553 |
list_add(&ee->list, &execve_list); |
/* Same with get_arg_page(bprm, pos, 0) in fs/exec.c */ |
1554 |
spin_unlock(&execve_list_lock); |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1555 |
/***** CRITICAL SECTION END *****/ |
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1556 |
return 0; |
return false; |
1557 |
|
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR == 3 && defined(CONFIG_MMU) |
1558 |
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1559 |
|
return false; |
1560 |
|
#else |
1561 |
|
page = bprm->page[pos / PAGE_SIZE]; |
1562 |
|
#endif |
1563 |
|
if (page != dump->page) { |
1564 |
|
const unsigned int offset = pos % PAGE_SIZE; |
1565 |
|
/* |
1566 |
|
* Maybe kmap()/kunmap() should be used here. |
1567 |
|
* But remove_arg_zero() uses kmap_atomic()/kunmap_atomic(). |
1568 |
|
* So do I. |
1569 |
|
*/ |
1570 |
|
char *kaddr = kmap_atomic(page, KM_USER0); |
1571 |
|
dump->page = page; |
1572 |
|
memcpy(dump->data + offset, kaddr + offset, PAGE_SIZE - offset); |
1573 |
|
kunmap_atomic(kaddr, KM_USER0); |
1574 |
|
} |
1575 |
|
/* Same with put_arg_page(page) in fs/exec.c */ |
1576 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1577 |
|
put_page(page); |
1578 |
|
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR == 3 && defined(CONFIG_MMU) |
1579 |
|
put_page(page); |
1580 |
|
#endif |
1581 |
|
return true; |
1582 |
} |
} |
1583 |
|
|
1584 |
/** |
/** |
1585 |
* ccs_fetch_next_domain - Fetch next_domain from the list. |
* ccs_fetch_next_domain - Fetch next_domain from the list. |
1586 |
* |
* |
1587 |
* Returns pointer to "struct domain_info" which will be used if execve() |
* Returns pointer to "struct ccs_domain_info" which will be used if execve() |
1588 |
* succeeds. This function does not return NULL. |
* succeeds. This function does not return NULL. |
1589 |
*/ |
*/ |
1590 |
struct domain_info *ccs_fetch_next_domain(void) |
struct ccs_domain_info *ccs_fetch_next_domain(void) |
1591 |
{ |
{ |
1592 |
struct task_struct *task = current; |
struct ccs_execve_entry *ee = ccs_find_execve_entry(); |
1593 |
struct domain_info *next_domain = task->domain_info; |
struct ccs_domain_info *next_domain = NULL; |
1594 |
struct execve_entry *p; |
if (ee) |
1595 |
/***** CRITICAL SECTION START *****/ |
next_domain = ee->next_domain; |
1596 |
spin_lock(&execve_list_lock); |
if (!next_domain) |
1597 |
list_for_each_entry(p, &execve_list, list) { |
next_domain = ccs_current_domain(); |
|
if (p->task != task) |
|
|
continue; |
|
|
next_domain = p->next_domain; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&execve_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
1598 |
return next_domain; |
return next_domain; |
1599 |
} |
} |
1600 |
|
|
1601 |
/** |
/** |
1602 |
* ccs_unregister_next_domain - Forget next_domain. |
* ccs_start_execve - Prepare for execve() operation. |
|
*/ |
|
|
static void ccs_unregister_next_domain(void) |
|
|
{ |
|
|
struct task_struct *task = current; |
|
|
struct execve_entry *p; |
|
|
struct execve_entry *ee = NULL; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&execve_list_lock); |
|
|
list_for_each_entry(p, &execve_list, list) { |
|
|
if (p->task != task) |
|
|
continue; |
|
|
list_del(&p->list); |
|
|
ee = p; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&execve_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
kfree(ee); |
|
|
} |
|
|
|
|
|
/** |
|
|
* search_binary_handler_with_transition - Perform domain transition. |
|
1603 |
* |
* |
1604 |
* @bprm: Pointer to "struct linux_binprm". |
* @bprm: Pointer to "struct linux_binprm". |
|
* @regs: Pointer to "struct pt_regs". |
|
1605 |
* |
* |
1606 |
* Returns result of search_binary_handler() on success, |
* Returns 0 on success, negative value otherwise. |
|
* negative value otherwise. |
|
1607 |
*/ |
*/ |
1608 |
int search_binary_handler_with_transition(struct linux_binprm *bprm, |
int ccs_start_execve(struct linux_binprm *bprm) |
|
struct pt_regs *regs) |
|
1609 |
{ |
{ |
1610 |
int retval; |
int retval; |
1611 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1612 |
const struct path_info *handler; |
struct ccs_execve_entry *ee = ccs_allocate_execve_entry(); |
1613 |
struct ccs_request_info r; |
if (!ccs_policy_loaded) |
|
struct obj_info obj; |
|
|
/* |
|
|
* "eh_path" holds path to execute handler program. |
|
|
* Thus, keep valid until search_binary_handler() finishes. |
|
|
*/ |
|
|
char *eh_path = NULL; |
|
|
struct ccs_page_buffer *tmp = ccs_alloc(sizeof(struct ccs_page_buffer)); |
|
|
memset(&obj, 0, sizeof(obj)); |
|
|
if (!sbin_init_started) |
|
1614 |
ccs_load_policy(bprm->filename); |
ccs_load_policy(bprm->filename); |
1615 |
if (!tmp) |
if (!ee) |
1616 |
return -ENOMEM; |
return -ENOMEM; |
1617 |
|
ccs_init_request_info(&ee->r, NULL, CCS_MAC_FOR_FILE); |
1618 |
ccs_init_request_info(&r, NULL, CCS_TOMOYO_MAC_FOR_FILE); |
ee->r.ee = ee; |
1619 |
r.bprm = bprm; |
ee->bprm = bprm; |
1620 |
r.obj = &obj; |
ee->r.obj = &ee->obj; |
1621 |
obj.path1_dentry = bprm->file->f_dentry; |
ee->obj.path1_dentry = bprm->file->f_dentry; |
1622 |
obj.path1_vfsmnt = bprm->file->f_vfsmnt; |
ee->obj.path1_vfsmnt = bprm->file->f_vfsmnt; |
|
obj.tmp = tmp; |
|
|
|
|
1623 |
/* Clear manager flag. */ |
/* Clear manager flag. */ |
1624 |
task->tomoyo_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
task->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
1625 |
handler = find_execute_handler(TYPE_EXECUTE_HANDLER); |
if (ccs_find_execute_handler(ee, TYPE_EXECUTE_HANDLER)) { |
1626 |
if (handler) { |
retval = ccs_try_alt_exec(ee); |
|
retval = try_alt_exec(&r, handler, &eh_path); |
|
1627 |
if (!retval) |
if (!retval) |
1628 |
audit_execute_handler_log(true, handler->name, bprm); |
ccs_audit_execute_handler_log(ee, true); |
1629 |
goto ok; |
goto ok; |
1630 |
} |
} |
1631 |
retval = find_next_domain(&r, NULL); |
retval = ccs_find_next_domain(ee); |
1632 |
if (retval != -EPERM) |
if (retval != -EPERM) |
1633 |
goto ok; |
goto ok; |
1634 |
handler = find_execute_handler(TYPE_DENIED_EXECUTE_HANDLER); |
if (ccs_find_execute_handler(ee, TYPE_DENIED_EXECUTE_HANDLER)) { |
1635 |
if (handler) { |
retval = ccs_try_alt_exec(ee); |
|
retval = try_alt_exec(&r, handler, &eh_path); |
|
1636 |
if (!retval) |
if (!retval) |
1637 |
audit_execute_handler_log(false, handler->name, bprm); |
ccs_audit_execute_handler_log(ee, false); |
1638 |
} |
} |
1639 |
ok: |
ok: |
1640 |
if (retval < 0) |
if (retval < 0) |
1641 |
goto out; |
goto out; |
1642 |
r.mode = ccs_check_flags(r.domain, CCS_TOMOYO_MAC_FOR_ENV); |
ee->r.mode = ccs_check_flags(ee->r.domain, CCS_MAC_FOR_ENV); |
1643 |
retval = check_environ(&r); |
retval = ccs_check_environ(ee); |
|
if (retval < 0) |
|
|
goto out; |
|
|
retval = ccs_register_next_domain(r.domain); |
|
1644 |
if (retval < 0) |
if (retval < 0) |
1645 |
goto out; |
goto out; |
1646 |
task->tomoyo_flags |= TOMOYO_CHECK_READ_FOR_OPEN_EXEC; |
ee->next_domain = ee->r.domain; |
1647 |
retval = search_binary_handler(bprm, regs); |
task->ccs_flags |= CCS_CHECK_READ_FOR_OPEN_EXEC; |
1648 |
task->tomoyo_flags &= ~TOMOYO_CHECK_READ_FOR_OPEN_EXEC; |
retval = 0; |
1649 |
|
out: |
1650 |
|
if (retval) |
1651 |
|
ccs_finish_execve(retval); |
1652 |
|
return retval; |
1653 |
|
} |
1654 |
|
|
1655 |
|
/** |
1656 |
|
* ccs_finish_execve - Clean up execve() operation. |
1657 |
|
* |
1658 |
|
* @retval: Return code of an execve() operation. |
1659 |
|
*/ |
1660 |
|
void ccs_finish_execve(int retval) |
1661 |
|
{ |
1662 |
|
struct task_struct *task = current; |
1663 |
|
struct ccs_execve_entry *ee = ccs_find_execve_entry(); |
1664 |
|
task->ccs_flags &= ~CCS_CHECK_READ_FOR_OPEN_EXEC; |
1665 |
|
if (!ee) |
1666 |
|
return; |
1667 |
if (retval < 0) |
if (retval < 0) |
1668 |
goto out; |
goto out; |
1669 |
/* Proceed to next domain if execution suceeded. */ |
/* Proceed to next domain if execution suceeded. */ |
1670 |
task->domain_info = r.domain; |
task->ccs_domain_info = ee->r.domain; |
1671 |
mb(); /* Make domain transition visible to other CPUs. */ |
mb(); /* Make domain transition visible to other CPUs. */ |
1672 |
/* Mark the current process as execute handler. */ |
/* Mark the current process as execute handler. */ |
1673 |
if (handler) |
if (ee->handler) |
1674 |
task->tomoyo_flags |= TOMOYO_TASK_IS_EXECUTE_HANDLER; |
task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER; |
1675 |
/* Mark the current process as normal process. */ |
/* Mark the current process as normal process. */ |
1676 |
else |
else |
1677 |
task->tomoyo_flags &= ~TOMOYO_TASK_IS_EXECUTE_HANDLER; |
task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER; |
1678 |
out: |
out: |
1679 |
ccs_unregister_next_domain(); |
ccs_free_execve_entry(ee); |
|
ccs_free(eh_path); |
|
|
ccs_free(tmp); |
|
|
return retval; |
|
1680 |
} |
} |
1681 |
|
|
1682 |
#else |
#else |
1683 |
|
|
1684 |
/** |
/** |
1685 |
* search_binary_handler_with_transition - Wrapper for search_binary_handler(). |
* ccs_start_execve - Prepare for execve() operation. |
1686 |
* |
* |
1687 |
* @bprm: Pointer to "struct linux_binprm". |
* @bprm: Pointer to "struct linux_binprm". |
|
* @regs: Pointer to "struct pt_regs". |
|
1688 |
* |
* |
1689 |
* Returns the result of search_binary_handler(). |
* Returns 0. |
1690 |
*/ |
*/ |
1691 |
int search_binary_handler_with_transition(struct linux_binprm *bprm, |
int ccs_start_execve(struct linux_binprm *bprm) |
|
struct pt_regs *regs) |
|
1692 |
{ |
{ |
1693 |
#ifdef CONFIG_SAKURA |
#ifdef CONFIG_SAKURA |
1694 |
/* Clear manager flag. */ |
/* Clear manager flag. */ |
1695 |
current->tomoyo_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
current->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
1696 |
ccs_load_policy(bprm->filename); |
if (!ccs_policy_loaded) |
1697 |
|
ccs_load_policy(bprm->filename); |
1698 |
#endif |
#endif |
1699 |
return search_binary_handler(bprm, regs); |
return 0; |
1700 |
|
} |
1701 |
|
|
1702 |
|
/** |
1703 |
|
* ccs_finish_execve - Clean up execve() operation. |
1704 |
|
*/ |
1705 |
|
void ccs_finish_execve(int retval) |
1706 |
|
{ |
1707 |
} |
} |
1708 |
|
|
1709 |
#endif |
#endif |