1 |
kumaneko |
111 |
/* |
2 |
|
|
* fs/tomoyo_domain.c |
3 |
|
|
* |
4 |
|
|
* Implementation of the Domain-Based Mandatory Access Control. |
5 |
|
|
* |
6 |
kumaneko |
851 |
* Copyright (C) 2005-2008 NTT DATA CORPORATION |
7 |
kumaneko |
111 |
* |
8 |
kumaneko |
1015 |
* Version: 1.6.0-pre 2008/03/04 |
9 |
kumaneko |
111 |
* |
10 |
|
|
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
11 |
|
|
* See README.ccs for ChangeLog. |
12 |
|
|
* |
13 |
|
|
*/ |
14 |
|
|
/***** TOMOYO Linux start. *****/ |
15 |
|
|
|
16 |
|
|
#include <linux/ccs_common.h> |
17 |
|
|
#include <linux/tomoyo.h> |
18 |
|
|
#include <linux/realpath.h> |
19 |
kumaneko |
115 |
#include <linux/highmem.h> |
20 |
|
|
#include <linux/binfmts.h> |
21 |
|
|
|
22 |
kumaneko |
111 |
#ifndef for_each_process |
23 |
|
|
#define for_each_process for_each_task |
24 |
|
|
#endif |
25 |
|
|
|
26 |
|
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/************************* VARIABLES *************************/ |
27 |
|
|
|
28 |
|
|
/* The initial domain. */ |
29 |
kumaneko |
708 |
struct domain_info KERNEL_DOMAIN; |
30 |
kumaneko |
111 |
|
31 |
kumaneko |
708 |
/* List of domains. */ |
32 |
kumaneko |
722 |
LIST1_HEAD(domain_list); |
33 |
kumaneko |
708 |
|
34 |
kumaneko |
111 |
#ifdef CONFIG_TOMOYO |
35 |
|
|
|
36 |
|
|
/* Lock for appending domain's ACL. */ |
37 |
kumaneko |
652 |
DEFINE_MUTEX(domain_acl_lock); |
38 |
kumaneko |
111 |
|
39 |
|
|
/************************* UTILITY FUNCTIONS *************************/ |
40 |
|
|
|
41 |
|
|
/***** The structure for program files to force domain reconstruction. *****/ |
42 |
|
|
|
43 |
kumaneko |
214 |
struct domain_initializer_entry { |
44 |
kumaneko |
722 |
struct list1_head list; |
45 |
kumaneko |
111 |
const struct path_info *domainname; /* This may be NULL */ |
46 |
|
|
const struct path_info *program; |
47 |
kumaneko |
621 |
bool is_deleted; |
48 |
|
|
bool is_not; |
49 |
|
|
bool is_last_name; |
50 |
kumaneko |
214 |
}; |
51 |
kumaneko |
111 |
|
52 |
|
|
/***** The structure for domains to not to transit domains. *****/ |
53 |
|
|
|
54 |
kumaneko |
214 |
struct domain_keeper_entry { |
55 |
kumaneko |
722 |
struct list1_head list; |
56 |
kumaneko |
111 |
const struct path_info *domainname; |
57 |
|
|
const struct path_info *program; /* This may be NULL */ |
58 |
kumaneko |
621 |
bool is_deleted; |
59 |
|
|
bool is_not; |
60 |
|
|
bool is_last_name; |
61 |
kumaneko |
214 |
}; |
62 |
kumaneko |
111 |
|
63 |
|
|
/***** The structure for program files that should be aggregated. *****/ |
64 |
|
|
|
65 |
kumaneko |
214 |
struct aggregator_entry { |
66 |
kumaneko |
722 |
struct list1_head list; |
67 |
kumaneko |
111 |
const struct path_info *original_name; |
68 |
|
|
const struct path_info *aggregated_name; |
69 |
kumaneko |
621 |
bool is_deleted; |
70 |
kumaneko |
214 |
}; |
71 |
kumaneko |
111 |
|
72 |
|
|
/***** The structure for program files that should be aliased. *****/ |
73 |
|
|
|
74 |
kumaneko |
214 |
struct alias_entry { |
75 |
kumaneko |
722 |
struct list1_head list; |
76 |
kumaneko |
111 |
const struct path_info *original_name; |
77 |
|
|
const struct path_info *aliased_name; |
78 |
kumaneko |
621 |
bool is_deleted; |
79 |
kumaneko |
214 |
}; |
80 |
kumaneko |
111 |
|
81 |
|
|
/************************* VARIABLES *************************/ |
82 |
|
|
|
83 |
|
|
/* Domain creation lock. */ |
84 |
kumaneko |
652 |
static DEFINE_MUTEX(new_domain_assign_lock); |
85 |
kumaneko |
111 |
|
86 |
|
|
/************************* UTILITY FUNCTIONS *************************/ |
87 |
|
|
|
88 |
|
|
const char *GetLastName(const struct domain_info *domain) |
89 |
|
|
{ |
90 |
|
|
const char *cp0 = domain->domainname->name, *cp1; |
91 |
|
|
if ((cp1 = strrchr(cp0, ' ')) != NULL) return cp1 + 1; |
92 |
|
|
return cp0; |
93 |
|
|
} |
94 |
|
|
|
95 |
kumaneko |
708 |
int AddDomainACL(struct domain_info *domain, struct acl_info *acl) |
96 |
kumaneko |
111 |
{ |
97 |
kumaneko |
906 |
if (domain) list1_add_tail_mb(&acl->list, &domain->acl_info_list); |
98 |
|
|
else acl->type &= ~ACL_DELETED; |
99 |
kumaneko |
111 |
UpdateCounter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
100 |
|
|
return 0; |
101 |
|
|
} |
102 |
|
|
|
103 |
kumaneko |
906 |
int DelDomainACL(struct acl_info *acl) |
104 |
kumaneko |
111 |
{ |
105 |
kumaneko |
906 |
if (acl) acl->type |= ACL_DELETED; |
106 |
kumaneko |
111 |
UpdateCounter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
107 |
|
|
return 0; |
108 |
|
|
} |
109 |
|
|
|
110 |
|
|
/************************* DOMAIN INITIALIZER HANDLER *************************/ |
111 |
|
|
|
112 |
kumaneko |
722 |
static LIST1_HEAD(domain_initializer_list); |
113 |
kumaneko |
111 |
|
114 |
kumaneko |
621 |
static int AddDomainInitializerEntry(const char *domainname, const char *program, const bool is_not, const bool is_delete) |
115 |
kumaneko |
111 |
{ |
116 |
kumaneko |
214 |
struct domain_initializer_entry *new_entry, *ptr; |
117 |
kumaneko |
652 |
static DEFINE_MUTEX(lock); |
118 |
kumaneko |
111 |
const struct path_info *saved_program, *saved_domainname = NULL; |
119 |
|
|
int error = -ENOMEM; |
120 |
kumaneko |
621 |
bool is_last_name = 0; |
121 |
kumaneko |
111 |
if (!IsCorrectPath(program, 1, -1, -1, __FUNCTION__)) return -EINVAL; /* No patterns allowed. */ |
122 |
|
|
if (domainname) { |
123 |
|
|
if (!IsDomainDef(domainname) && IsCorrectPath(domainname, 1, -1, -1, __FUNCTION__)) { |
124 |
|
|
is_last_name = 1; |
125 |
|
|
} else if (!IsCorrectDomain(domainname, __FUNCTION__)) { |
126 |
|
|
return -EINVAL; |
127 |
|
|
} |
128 |
|
|
if ((saved_domainname = SaveName(domainname)) == NULL) return -ENOMEM; |
129 |
|
|
} |
130 |
|
|
if ((saved_program = SaveName(program)) == NULL) return -ENOMEM; |
131 |
kumaneko |
652 |
mutex_lock(&lock); |
132 |
kumaneko |
722 |
list1_for_each_entry(ptr, &domain_initializer_list, list) { |
133 |
kumaneko |
366 |
if (ptr->is_not == is_not && ptr->domainname == saved_domainname && ptr->program == saved_program) { |
134 |
kumaneko |
111 |
ptr->is_deleted = is_delete; |
135 |
|
|
error = 0; |
136 |
|
|
goto out; |
137 |
|
|
} |
138 |
|
|
} |
139 |
|
|
if (is_delete) { |
140 |
|
|
error = -ENOENT; |
141 |
|
|
goto out; |
142 |
|
|
} |
143 |
kumaneko |
214 |
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) goto out; |
144 |
kumaneko |
111 |
new_entry->domainname = saved_domainname; |
145 |
|
|
new_entry->program = saved_program; |
146 |
|
|
new_entry->is_not = is_not; |
147 |
|
|
new_entry->is_last_name = is_last_name; |
148 |
kumaneko |
722 |
list1_add_tail_mb(&new_entry->list, &domain_initializer_list); |
149 |
kumaneko |
111 |
error = 0; |
150 |
|
|
out: |
151 |
kumaneko |
652 |
mutex_unlock(&lock); |
152 |
kumaneko |
111 |
return error; |
153 |
|
|
} |
154 |
|
|
|
155 |
kumaneko |
214 |
int ReadDomainInitializerPolicy(struct io_buffer *head) |
156 |
kumaneko |
111 |
{ |
157 |
kumaneko |
722 |
struct list1_head *pos; |
158 |
|
|
list1_for_each_cookie(pos, head->read_var2, &domain_initializer_list) { |
159 |
kumaneko |
708 |
struct domain_initializer_entry *ptr; |
160 |
kumaneko |
722 |
ptr = list1_entry(pos, struct domain_initializer_entry, list); |
161 |
kumaneko |
708 |
if (ptr->is_deleted) continue; |
162 |
|
|
if (ptr->domainname) { |
163 |
|
|
if (io_printf(head, "%s" KEYWORD_INITIALIZE_DOMAIN "%s from %s\n", ptr->is_not ? "no_" : "", ptr->program->name, ptr->domainname->name)) return -ENOMEM; |
164 |
|
|
} else { |
165 |
|
|
if (io_printf(head, "%s" KEYWORD_INITIALIZE_DOMAIN "%s\n", ptr->is_not ? "no_" : "", ptr->program->name)) return -ENOMEM; |
166 |
kumaneko |
111 |
} |
167 |
|
|
} |
168 |
kumaneko |
708 |
return 0; |
169 |
kumaneko |
111 |
} |
170 |
|
|
|
171 |
kumaneko |
621 |
int AddDomainInitializerPolicy(char *data, const bool is_not, const bool is_delete) |
172 |
kumaneko |
111 |
{ |
173 |
|
|
char *cp = strstr(data, " from "); |
174 |
|
|
if (cp) { |
175 |
|
|
*cp = '\0'; |
176 |
kumaneko |
366 |
return AddDomainInitializerEntry(cp + 6, data, is_not, is_delete); |
177 |
kumaneko |
111 |
} else { |
178 |
kumaneko |
366 |
return AddDomainInitializerEntry(NULL, data, is_not, is_delete); |
179 |
kumaneko |
111 |
} |
180 |
|
|
} |
181 |
|
|
|
182 |
kumaneko |
708 |
static bool IsDomainInitializer(const struct path_info *domainname, const struct path_info *program, const struct path_info *last_name) |
183 |
kumaneko |
111 |
{ |
184 |
kumaneko |
214 |
struct domain_initializer_entry *ptr; |
185 |
kumaneko |
708 |
bool flag = 0; |
186 |
kumaneko |
722 |
list1_for_each_entry(ptr, &domain_initializer_list, list) { |
187 |
kumaneko |
708 |
if (ptr->is_deleted) continue; |
188 |
kumaneko |
111 |
if (ptr->domainname) { |
189 |
|
|
if (!ptr->is_last_name) { |
190 |
|
|
if (ptr->domainname != domainname) continue; |
191 |
|
|
} else { |
192 |
|
|
if (pathcmp(ptr->domainname, last_name)) continue; |
193 |
|
|
} |
194 |
|
|
} |
195 |
|
|
if (pathcmp(ptr->program, program)) continue; |
196 |
|
|
if (ptr->is_not) return 0; |
197 |
|
|
flag = 1; |
198 |
|
|
} |
199 |
|
|
return flag; |
200 |
|
|
} |
201 |
|
|
|
202 |
|
|
/************************* DOMAIN KEEPER HANDLER *************************/ |
203 |
|
|
|
204 |
kumaneko |
722 |
static LIST1_HEAD(domain_keeper_list); |
205 |
kumaneko |
111 |
|
206 |
kumaneko |
621 |
static int AddDomainKeeperEntry(const char *domainname, const char *program, const bool is_not, const bool is_delete) |
207 |
kumaneko |
111 |
{ |
208 |
kumaneko |
214 |
struct domain_keeper_entry *new_entry, *ptr; |
209 |
kumaneko |
111 |
const struct path_info *saved_domainname, *saved_program = NULL; |
210 |
kumaneko |
652 |
static DEFINE_MUTEX(lock); |
211 |
kumaneko |
111 |
int error = -ENOMEM; |
212 |
kumaneko |
621 |
bool is_last_name = 0; |
213 |
kumaneko |
111 |
if (!IsDomainDef(domainname) && IsCorrectPath(domainname, 1, -1, -1, __FUNCTION__)) { |
214 |
|
|
is_last_name = 1; |
215 |
|
|
} else if (!IsCorrectDomain(domainname, __FUNCTION__)) { |
216 |
|
|
return -EINVAL; |
217 |
|
|
} |
218 |
|
|
if (program) { |
219 |
|
|
if (!IsCorrectPath(program, 1, -1, -1, __FUNCTION__)) return -EINVAL; |
220 |
|
|
if ((saved_program = SaveName(program)) == NULL) return -ENOMEM; |
221 |
|
|
} |
222 |
|
|
if ((saved_domainname = SaveName(domainname)) == NULL) return -ENOMEM; |
223 |
kumaneko |
652 |
mutex_lock(&lock); |
224 |
kumaneko |
722 |
list1_for_each_entry(ptr, &domain_keeper_list, list) { |
225 |
kumaneko |
111 |
if (ptr->is_not == is_not && ptr->domainname == saved_domainname && ptr->program == saved_program) { |
226 |
|
|
ptr->is_deleted = is_delete; |
227 |
|
|
error = 0; |
228 |
|
|
goto out; |
229 |
|
|
} |
230 |
|
|
} |
231 |
|
|
if (is_delete) { |
232 |
|
|
error = -ENOENT; |
233 |
|
|
goto out; |
234 |
|
|
} |
235 |
kumaneko |
214 |
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) goto out; |
236 |
kumaneko |
111 |
new_entry->domainname = saved_domainname; |
237 |
|
|
new_entry->program = saved_program; |
238 |
|
|
new_entry->is_not = is_not; |
239 |
|
|
new_entry->is_last_name = is_last_name; |
240 |
kumaneko |
722 |
list1_add_tail_mb(&new_entry->list, &domain_keeper_list); |
241 |
kumaneko |
111 |
error = 0; |
242 |
|
|
out: |
243 |
kumaneko |
652 |
mutex_unlock(&lock); |
244 |
kumaneko |
111 |
return error; |
245 |
|
|
} |
246 |
|
|
|
247 |
kumaneko |
621 |
int AddDomainKeeperPolicy(char *data, const bool is_not, const bool is_delete) |
248 |
kumaneko |
111 |
{ |
249 |
|
|
char *cp = strstr(data, " from "); |
250 |
|
|
if (cp) { |
251 |
|
|
*cp = '\0'; |
252 |
|
|
return AddDomainKeeperEntry(cp + 6, data, is_not, is_delete); |
253 |
|
|
} else { |
254 |
|
|
return AddDomainKeeperEntry(data, NULL, is_not, is_delete); |
255 |
|
|
} |
256 |
|
|
} |
257 |
|
|
|
258 |
kumaneko |
214 |
int ReadDomainKeeperPolicy(struct io_buffer *head) |
259 |
kumaneko |
111 |
{ |
260 |
kumaneko |
722 |
struct list1_head *pos; |
261 |
|
|
list1_for_each_cookie(pos, head->read_var2, &domain_keeper_list) { |
262 |
kumaneko |
708 |
struct domain_keeper_entry *ptr; |
263 |
kumaneko |
722 |
ptr = list1_entry(pos, struct domain_keeper_entry, list); |
264 |
kumaneko |
708 |
if (ptr->is_deleted) continue; |
265 |
|
|
if (ptr->program) { |
266 |
|
|
if (io_printf(head, "%s" KEYWORD_KEEP_DOMAIN "%s from %s\n", ptr->is_not ? "no_" : "", ptr->program->name, ptr->domainname->name)) return -ENOMEM; |
267 |
|
|
} else { |
268 |
|
|
if (io_printf(head, "%s" KEYWORD_KEEP_DOMAIN "%s\n", ptr->is_not ? "no_" : "", ptr->domainname->name)) return -ENOMEM; |
269 |
kumaneko |
111 |
} |
270 |
|
|
} |
271 |
kumaneko |
708 |
return 0; |
272 |
kumaneko |
111 |
} |
273 |
|
|
|
274 |
kumaneko |
708 |
static bool IsDomainKeeper(const struct path_info *domainname, const struct path_info *program, const struct path_info *last_name) |
275 |
kumaneko |
111 |
{ |
276 |
kumaneko |
214 |
struct domain_keeper_entry *ptr; |
277 |
kumaneko |
708 |
bool flag = 0; |
278 |
kumaneko |
722 |
list1_for_each_entry(ptr, &domain_keeper_list, list) { |
279 |
kumaneko |
111 |
if (ptr->is_deleted) continue; |
280 |
|
|
if (!ptr->is_last_name) { |
281 |
|
|
if (ptr->domainname != domainname) continue; |
282 |
|
|
} else { |
283 |
kumaneko |
708 |
if (pathcmp(ptr->domainname, last_name)) continue; |
284 |
kumaneko |
111 |
} |
285 |
|
|
if (ptr->program && pathcmp(ptr->program, program)) continue; |
286 |
|
|
if (ptr->is_not) return 0; |
287 |
|
|
flag = 1; |
288 |
|
|
} |
289 |
|
|
return flag; |
290 |
|
|
} |
291 |
|
|
|
292 |
|
|
/************************* SYMBOLIC LINKED PROGRAM HANDLER *************************/ |
293 |
|
|
|
294 |
kumaneko |
722 |
static LIST1_HEAD(alias_list); |
295 |
kumaneko |
111 |
|
296 |
kumaneko |
621 |
static int AddAliasEntry(const char *original_name, const char *aliased_name, const bool is_delete) |
297 |
kumaneko |
111 |
{ |
298 |
kumaneko |
214 |
struct alias_entry *new_entry, *ptr; |
299 |
kumaneko |
652 |
static DEFINE_MUTEX(lock); |
300 |
kumaneko |
111 |
const struct path_info *saved_original_name, *saved_aliased_name; |
301 |
|
|
int error = -ENOMEM; |
302 |
|
|
if (!IsCorrectPath(original_name, 1, -1, -1, __FUNCTION__) || !IsCorrectPath(aliased_name, 1, -1, -1, __FUNCTION__)) return -EINVAL; /* No patterns allowed. */ |
303 |
|
|
if ((saved_original_name = SaveName(original_name)) == NULL || (saved_aliased_name = SaveName(aliased_name)) == NULL) return -ENOMEM; |
304 |
kumaneko |
652 |
mutex_lock(&lock); |
305 |
kumaneko |
722 |
list1_for_each_entry(ptr, &alias_list, list) { |
306 |
kumaneko |
111 |
if (ptr->original_name == saved_original_name && ptr->aliased_name == saved_aliased_name) { |
307 |
|
|
ptr->is_deleted = is_delete; |
308 |
|
|
error = 0; |
309 |
|
|
goto out; |
310 |
|
|
} |
311 |
|
|
} |
312 |
|
|
if (is_delete) { |
313 |
|
|
error = -ENOENT; |
314 |
|
|
goto out; |
315 |
|
|
} |
316 |
kumaneko |
214 |
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) goto out; |
317 |
kumaneko |
111 |
new_entry->original_name = saved_original_name; |
318 |
|
|
new_entry->aliased_name = saved_aliased_name; |
319 |
kumaneko |
722 |
list1_add_tail_mb(&new_entry->list, &alias_list); |
320 |
kumaneko |
111 |
error = 0; |
321 |
|
|
out: |
322 |
kumaneko |
652 |
mutex_unlock(&lock); |
323 |
kumaneko |
111 |
return error; |
324 |
|
|
} |
325 |
|
|
|
326 |
kumaneko |
214 |
int ReadAliasPolicy(struct io_buffer *head) |
327 |
kumaneko |
111 |
{ |
328 |
kumaneko |
722 |
struct list1_head *pos; |
329 |
|
|
list1_for_each_cookie(pos, head->read_var2, &alias_list) { |
330 |
kumaneko |
708 |
struct alias_entry *ptr; |
331 |
kumaneko |
722 |
ptr = list1_entry(pos, struct alias_entry, list); |
332 |
kumaneko |
708 |
if (ptr->is_deleted) continue; |
333 |
|
|
if (io_printf(head, KEYWORD_ALIAS "%s %s\n", ptr->original_name->name, ptr->aliased_name->name)) return -ENOMEM; |
334 |
kumaneko |
111 |
} |
335 |
kumaneko |
708 |
return 0; |
336 |
kumaneko |
111 |
} |
337 |
|
|
|
338 |
kumaneko |
621 |
int AddAliasPolicy(char *data, const bool is_delete) |
339 |
kumaneko |
111 |
{ |
340 |
|
|
char *cp = strchr(data, ' '); |
341 |
|
|
if (!cp) return -EINVAL; |
342 |
|
|
*cp++ = '\0'; |
343 |
|
|
return AddAliasEntry(data, cp, is_delete); |
344 |
|
|
} |
345 |
|
|
|
346 |
|
|
/************************* DOMAIN AGGREGATOR HANDLER *************************/ |
347 |
|
|
|
348 |
kumaneko |
722 |
static LIST1_HEAD(aggregator_list); |
349 |
kumaneko |
111 |
|
350 |
kumaneko |
621 |
static int AddAggregatorEntry(const char *original_name, const char *aggregated_name, const bool is_delete) |
351 |
kumaneko |
111 |
{ |
352 |
kumaneko |
214 |
struct aggregator_entry *new_entry, *ptr; |
353 |
kumaneko |
652 |
static DEFINE_MUTEX(lock); |
354 |
kumaneko |
111 |
const struct path_info *saved_original_name, *saved_aggregated_name; |
355 |
|
|
int error = -ENOMEM; |
356 |
|
|
if (!IsCorrectPath(original_name, 1, 0, -1, __FUNCTION__) || !IsCorrectPath(aggregated_name, 1, -1, -1, __FUNCTION__)) return -EINVAL; |
357 |
|
|
if ((saved_original_name = SaveName(original_name)) == NULL || (saved_aggregated_name = SaveName(aggregated_name)) == NULL) return -ENOMEM; |
358 |
kumaneko |
652 |
mutex_lock(&lock); |
359 |
kumaneko |
722 |
list1_for_each_entry(ptr, &aggregator_list, list) { |
360 |
kumaneko |
111 |
if (ptr->original_name == saved_original_name && ptr->aggregated_name == saved_aggregated_name) { |
361 |
|
|
ptr->is_deleted = is_delete; |
362 |
|
|
error = 0; |
363 |
|
|
goto out; |
364 |
|
|
} |
365 |
|
|
} |
366 |
|
|
if (is_delete) { |
367 |
|
|
error = -ENOENT; |
368 |
|
|
goto out; |
369 |
|
|
} |
370 |
kumaneko |
214 |
if ((new_entry = alloc_element(sizeof(*new_entry))) == NULL) goto out; |
371 |
kumaneko |
111 |
new_entry->original_name = saved_original_name; |
372 |
|
|
new_entry->aggregated_name = saved_aggregated_name; |
373 |
kumaneko |
722 |
list1_add_tail_mb(&new_entry->list, &aggregator_list); |
374 |
kumaneko |
111 |
error = 0; |
375 |
|
|
out: |
376 |
kumaneko |
652 |
mutex_unlock(&lock); |
377 |
kumaneko |
111 |
return error; |
378 |
|
|
} |
379 |
|
|
|
380 |
kumaneko |
214 |
int ReadAggregatorPolicy(struct io_buffer *head) |
381 |
kumaneko |
111 |
{ |
382 |
kumaneko |
722 |
struct list1_head *pos; |
383 |
|
|
list1_for_each_cookie(pos, head->read_var2, &aggregator_list) { |
384 |
kumaneko |
708 |
struct aggregator_entry *ptr; |
385 |
kumaneko |
722 |
ptr = list1_entry(pos, struct aggregator_entry, list); |
386 |
kumaneko |
708 |
if (ptr->is_deleted) continue; |
387 |
|
|
if (io_printf(head, KEYWORD_AGGREGATOR "%s %s\n", ptr->original_name->name, ptr->aggregated_name->name)) return -ENOMEM; |
388 |
kumaneko |
111 |
} |
389 |
kumaneko |
708 |
return 0; |
390 |
kumaneko |
111 |
} |
391 |
|
|
|
392 |
kumaneko |
621 |
int AddAggregatorPolicy(char *data, const bool is_delete) |
393 |
kumaneko |
111 |
{ |
394 |
|
|
char *cp = strchr(data, ' '); |
395 |
|
|
if (!cp) return -EINVAL; |
396 |
|
|
*cp++ = '\0'; |
397 |
|
|
return AddAggregatorEntry(data, cp, is_delete); |
398 |
|
|
} |
399 |
|
|
|
400 |
|
|
/************************* DOMAIN DELETION HANDLER *************************/ |
401 |
|
|
|
402 |
kumaneko |
240 |
/* #define DEBUG_DOMAIN_UNDELETE */ |
403 |
kumaneko |
111 |
|
404 |
|
|
int DeleteDomain(char *domainname0) |
405 |
|
|
{ |
406 |
|
|
struct domain_info *domain; |
407 |
|
|
struct path_info domainname; |
408 |
|
|
domainname.name = domainname0; |
409 |
|
|
fill_path_info(&domainname); |
410 |
kumaneko |
652 |
mutex_lock(&new_domain_assign_lock); |
411 |
kumaneko |
111 |
#ifdef DEBUG_DOMAIN_UNDELETE |
412 |
|
|
printk("DeleteDomain %s\n", domainname0); |
413 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
414 |
kumaneko |
111 |
if (pathcmp(domain->domainname, &domainname)) continue; |
415 |
|
|
printk("List: %p %u\n", domain, domain->is_deleted); |
416 |
|
|
} |
417 |
|
|
#endif |
418 |
|
|
/* Is there an active domain? */ |
419 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
420 |
kumaneko |
111 |
struct domain_info *domain2; |
421 |
kumaneko |
708 |
/* Never delete KERNEL_DOMAIN */ |
422 |
|
|
if (domain == &KERNEL_DOMAIN || domain->is_deleted || pathcmp(domain->domainname, &domainname)) continue; |
423 |
kumaneko |
111 |
/* Mark already deleted domains as non undeletable. */ |
424 |
kumaneko |
722 |
list1_for_each_entry(domain2, &domain_list, list) { |
425 |
kumaneko |
111 |
if (!domain2->is_deleted || pathcmp(domain2->domainname, &domainname)) continue; |
426 |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
427 |
|
|
if (domain2->is_deleted != 255) printk("Marked %p as non undeletable\n", domain2); |
428 |
|
|
#endif |
429 |
|
|
domain2->is_deleted = 255; |
430 |
|
|
} |
431 |
|
|
/* Delete and mark active domain as undeletable. */ |
432 |
|
|
domain->is_deleted = 1; |
433 |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
434 |
|
|
printk("Marked %p as undeletable\n", domain); |
435 |
|
|
#endif |
436 |
kumaneko |
708 |
break; |
437 |
kumaneko |
111 |
} |
438 |
kumaneko |
652 |
mutex_unlock(&new_domain_assign_lock); |
439 |
kumaneko |
111 |
return 0; |
440 |
|
|
} |
441 |
|
|
|
442 |
|
|
struct domain_info *UndeleteDomain(const char *domainname0) |
443 |
|
|
{ |
444 |
|
|
struct domain_info *domain, *candidate_domain = NULL; |
445 |
|
|
struct path_info domainname; |
446 |
|
|
domainname.name = domainname0; |
447 |
|
|
fill_path_info(&domainname); |
448 |
kumaneko |
652 |
mutex_lock(&new_domain_assign_lock); |
449 |
kumaneko |
111 |
#ifdef DEBUG_DOMAIN_UNDELETE |
450 |
|
|
printk("UndeleteDomain %s\n", domainname0); |
451 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
452 |
kumaneko |
111 |
if (pathcmp(domain->domainname, &domainname)) continue; |
453 |
|
|
printk("List: %p %u\n", domain, domain->is_deleted); |
454 |
|
|
} |
455 |
|
|
#endif |
456 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
457 |
kumaneko |
111 |
if (pathcmp(&domainname, domain->domainname)) continue; |
458 |
|
|
if (!domain->is_deleted) { |
459 |
|
|
/* This domain is active. I can't undelete. */ |
460 |
|
|
candidate_domain = NULL; |
461 |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
462 |
|
|
printk("%p is active. I can't undelete.\n", domain); |
463 |
|
|
#endif |
464 |
|
|
break; |
465 |
|
|
} |
466 |
|
|
/* Is this domain undeletable? */ |
467 |
|
|
if (domain->is_deleted == 1) candidate_domain = domain; |
468 |
|
|
} |
469 |
|
|
if (candidate_domain) { |
470 |
|
|
candidate_domain->is_deleted = 0; |
471 |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
472 |
|
|
printk("%p was undeleted.\n", candidate_domain); |
473 |
|
|
#endif |
474 |
|
|
} |
475 |
kumaneko |
652 |
mutex_unlock(&new_domain_assign_lock); |
476 |
kumaneko |
111 |
return candidate_domain; |
477 |
|
|
} |
478 |
|
|
|
479 |
|
|
/************************* DOMAIN TRANSITION HANDLER *************************/ |
480 |
|
|
|
481 |
|
|
struct domain_info *FindOrAssignNewDomain(const char *domainname, const u8 profile) |
482 |
|
|
{ |
483 |
|
|
struct domain_info *domain = NULL; |
484 |
|
|
const struct path_info *saved_domainname; |
485 |
kumaneko |
652 |
mutex_lock(&new_domain_assign_lock); |
486 |
kumaneko |
111 |
if ((domain = FindDomain(domainname)) != NULL) goto out; |
487 |
|
|
if (!IsCorrectDomain(domainname, __FUNCTION__)) goto out; |
488 |
|
|
if ((saved_domainname = SaveName(domainname)) == NULL) goto out; |
489 |
|
|
/* Can I reuse memory of deleted domain? */ |
490 |
kumaneko |
722 |
list1_for_each_entry(domain, &domain_list, list) { |
491 |
kumaneko |
111 |
struct task_struct *p; |
492 |
|
|
struct acl_info *ptr; |
493 |
kumaneko |
853 |
bool flag; |
494 |
kumaneko |
111 |
if (!domain->is_deleted || domain->domainname != saved_domainname) continue; |
495 |
|
|
flag = 0; |
496 |
|
|
/***** CRITICAL SECTION START *****/ |
497 |
|
|
read_lock(&tasklist_lock); |
498 |
|
|
for_each_process(p) { |
499 |
|
|
if (p->domain_info == domain) { flag = 1; break; } |
500 |
|
|
} |
501 |
|
|
read_unlock(&tasklist_lock); |
502 |
|
|
/***** CRITICAL SECTION END *****/ |
503 |
|
|
if (flag) continue; |
504 |
|
|
#ifdef DEBUG_DOMAIN_UNDELETE |
505 |
|
|
printk("Reusing %p %s\n", domain, domain->domainname->name); |
506 |
|
|
#endif |
507 |
kumaneko |
860 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
508 |
kumaneko |
906 |
ptr->type |= ACL_DELETED; |
509 |
kumaneko |
860 |
} |
510 |
kumaneko |
1007 |
domain->flags = 0; |
511 |
kumaneko |
111 |
domain->profile = profile; |
512 |
|
|
domain->quota_warned = 0; |
513 |
kumaneko |
708 |
mb(); /* Avoid out-of-order execution. */ |
514 |
kumaneko |
111 |
domain->is_deleted = 0; |
515 |
|
|
goto out; |
516 |
|
|
} |
517 |
|
|
/* No memory reusable. Create using new memory. */ |
518 |
kumaneko |
214 |
if ((domain = alloc_element(sizeof(*domain))) != NULL) { |
519 |
kumaneko |
722 |
INIT_LIST1_HEAD(&domain->acl_info_list); |
520 |
kumaneko |
111 |
domain->domainname = saved_domainname; |
521 |
|
|
domain->profile = profile; |
522 |
kumaneko |
722 |
list1_add_tail_mb(&domain->list, &domain_list); |
523 |
kumaneko |
111 |
} |
524 |
|
|
out: ; |
525 |
kumaneko |
652 |
mutex_unlock(&new_domain_assign_lock); |
526 |
kumaneko |
111 |
return domain; |
527 |
|
|
} |
528 |
|
|
|
529 |
|
|
static int Escape(char *dest, const char *src, int dest_len) |
530 |
|
|
{ |
531 |
|
|
while (*src) { |
532 |
|
|
const unsigned char c = * (const unsigned char *) src; |
533 |
|
|
if (c == '\\') { |
534 |
|
|
dest_len -= 2; |
535 |
|
|
if (dest_len <= 0) goto out; |
536 |
|
|
*dest++ = '\\'; |
537 |
|
|
*dest++ = '\\'; |
538 |
|
|
} else if (c > ' ' && c < 127) { |
539 |
|
|
if (--dest_len <= 0) goto out; |
540 |
|
|
*dest++ = c; |
541 |
|
|
} else { |
542 |
|
|
dest_len -= 4; |
543 |
|
|
if (dest_len <= 0) goto out; |
544 |
|
|
*dest++ = '\\'; |
545 |
|
|
*dest++ = (c >> 6) + '0'; |
546 |
|
|
*dest++ = ((c >> 3) & 7) + '0'; |
547 |
|
|
*dest++ = (c & 7) + '0'; |
548 |
|
|
} |
549 |
|
|
src++; |
550 |
|
|
} |
551 |
|
|
if (--dest_len <= 0) goto out; |
552 |
|
|
*dest = '\0'; |
553 |
|
|
return 0; |
554 |
|
|
out: |
555 |
|
|
return -ENOMEM; |
556 |
|
|
} |
557 |
|
|
|
558 |
kumaneko |
115 |
static char *get_argv0(struct linux_binprm *bprm) |
559 |
kumaneko |
111 |
{ |
560 |
kumaneko |
316 |
char *arg_ptr = ccs_alloc(PAGE_SIZE); /* Initial buffer. */ |
561 |
|
|
int arg_len = 0; |
562 |
|
|
unsigned long pos = bprm->p; |
563 |
|
|
int i = pos / PAGE_SIZE, offset = pos % PAGE_SIZE; |
564 |
|
|
if (!bprm->argc || !arg_ptr) goto out; |
565 |
|
|
while (1) { |
566 |
|
|
struct page *page; |
567 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
568 |
|
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) goto out; |
569 |
|
|
#else |
570 |
|
|
page = bprm->page[i]; |
571 |
|
|
#endif |
572 |
|
|
{ /* Map and copy to kernel buffer and unmap. */ |
573 |
kumaneko |
115 |
const char *kaddr = kmap(page); |
574 |
kumaneko |
316 |
if (!kaddr) { /* Mapping failed. */ |
575 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
576 |
|
|
put_page(page); |
577 |
|
|
#endif |
578 |
|
|
goto out; |
579 |
|
|
} |
580 |
kumaneko |
115 |
memmove(arg_ptr + arg_len, kaddr + offset, PAGE_SIZE - offset); |
581 |
|
|
kunmap(page); |
582 |
|
|
} |
583 |
kumaneko |
316 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
584 |
|
|
put_page(page); |
585 |
|
|
pos += PAGE_SIZE - offset; |
586 |
|
|
#endif |
587 |
|
|
arg_len += PAGE_SIZE - offset; |
588 |
|
|
if (memchr(arg_ptr, '\0', arg_len)) break; |
589 |
|
|
{ /* Initial buffer was too small for argv[0]. Retry after expanding buffer. */ |
590 |
|
|
char *tmp_arg_ptr = ccs_alloc(arg_len + PAGE_SIZE); |
591 |
|
|
if (!tmp_arg_ptr) goto out; |
592 |
|
|
memmove(tmp_arg_ptr, arg_ptr, arg_len); |
593 |
|
|
ccs_free(arg_ptr); |
594 |
|
|
arg_ptr = tmp_arg_ptr; |
595 |
|
|
} |
596 |
|
|
i++; |
597 |
|
|
offset = 0; |
598 |
kumaneko |
115 |
} |
599 |
kumaneko |
316 |
return arg_ptr; |
600 |
|
|
out: /* Release initial buffer. */ |
601 |
|
|
ccs_free(arg_ptr); |
602 |
kumaneko |
115 |
return NULL; |
603 |
|
|
} |
604 |
|
|
|
605 |
kumaneko |
708 |
static int FindNextDomain(struct linux_binprm *bprm, struct domain_info **next_domain, const u8 do_perm_check) |
606 |
kumaneko |
115 |
{ |
607 |
kumaneko |
111 |
/* This function assumes that the size of buffer returned by realpath() = CCS_MAX_PATHNAME_LEN. */ |
608 |
|
|
struct domain_info *old_domain = current->domain_info, *domain = NULL; |
609 |
|
|
const char *old_domain_name = old_domain->domainname->name; |
610 |
kumaneko |
115 |
const char *original_name = bprm->filename; |
611 |
kumaneko |
111 |
char *new_domain_name = NULL; |
612 |
|
|
char *real_program_name = NULL, *symlink_program_name = NULL; |
613 |
kumaneko |
815 |
const bool is_enforce = (CheckCCSFlags(CCS_TOMOYO_MAC_FOR_FILE) == 3); |
614 |
kumaneko |
111 |
int retval; |
615 |
|
|
struct path_info r, s, l; |
616 |
|
|
|
617 |
|
|
{ |
618 |
|
|
/* |
619 |
|
|
* Built-in initializers. This is needed because policies are not loaded until starting /sbin/init . |
620 |
|
|
*/ |
621 |
kumaneko |
853 |
static bool first = 1; |
622 |
kumaneko |
111 |
if (first) { |
623 |
kumaneko |
366 |
AddDomainInitializerEntry(NULL, "/sbin/hotplug", 0, 0); |
624 |
|
|
AddDomainInitializerEntry(NULL, "/sbin/modprobe", 0, 0); |
625 |
kumaneko |
111 |
first = 0; |
626 |
|
|
} |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
/* Get realpath of program. */ |
630 |
|
|
retval = -ENOENT; /* I hope realpath() won't fail with -ENOMEM. */ |
631 |
|
|
if ((real_program_name = realpath(original_name)) == NULL) goto out; |
632 |
|
|
/* Get realpath of symbolic link. */ |
633 |
|
|
if ((symlink_program_name = realpath_nofollow(original_name)) == NULL) goto out; |
634 |
|
|
|
635 |
|
|
r.name = real_program_name; |
636 |
|
|
fill_path_info(&r); |
637 |
|
|
s.name = symlink_program_name; |
638 |
|
|
fill_path_info(&s); |
639 |
|
|
if ((l.name = strrchr(old_domain_name, ' ')) != NULL) l.name++; |
640 |
|
|
else l.name = old_domain_name; |
641 |
|
|
fill_path_info(&l); |
642 |
|
|
|
643 |
kumaneko |
708 |
if (!do_perm_check) goto ok; |
644 |
|
|
|
645 |
kumaneko |
111 |
/* Check 'alias' directive. */ |
646 |
|
|
if (pathcmp(&r, &s)) { |
647 |
kumaneko |
214 |
struct alias_entry *ptr; |
648 |
kumaneko |
111 |
/* Is this program allowed to be called via symbolic links? */ |
649 |
kumaneko |
722 |
list1_for_each_entry(ptr, &alias_list, list) { |
650 |
kumaneko |
111 |
if (ptr->is_deleted || pathcmp(&r, ptr->original_name) || pathcmp(&s, ptr->aliased_name)) continue; |
651 |
|
|
memset(real_program_name, 0, CCS_MAX_PATHNAME_LEN); |
652 |
|
|
strncpy(real_program_name, ptr->aliased_name->name, CCS_MAX_PATHNAME_LEN - 1); |
653 |
|
|
fill_path_info(&r); |
654 |
|
|
break; |
655 |
|
|
} |
656 |
|
|
} |
657 |
|
|
|
658 |
kumaneko |
183 |
/* Compare basename of real_program_name and argv[0] */ |
659 |
kumaneko |
115 |
if (bprm->argc > 0 && CheckCCSFlags(CCS_TOMOYO_MAC_FOR_ARGV0)) { |
660 |
|
|
char *org_argv0 = get_argv0(bprm); |
661 |
|
|
retval = -ENOMEM; |
662 |
|
|
if (org_argv0) { |
663 |
|
|
const int len = strlen(org_argv0); |
664 |
|
|
char *printable_argv0 = ccs_alloc(len * 4 + 8); |
665 |
|
|
if (printable_argv0 && Escape(printable_argv0, org_argv0, len * 4 + 8) == 0) { |
666 |
kumaneko |
111 |
const char *base_argv0, *base_filename; |
667 |
|
|
if ((base_argv0 = strrchr(printable_argv0, '/')) == NULL) base_argv0 = printable_argv0; else base_argv0++; |
668 |
kumaneko |
183 |
if ((base_filename = strrchr(real_program_name, '/')) == NULL) base_filename = real_program_name; else base_filename++; |
669 |
|
|
if (strcmp(base_argv0, base_filename)) retval = CheckArgv0Perm(&r, base_argv0); |
670 |
kumaneko |
115 |
else retval = 0; |
671 |
kumaneko |
111 |
} |
672 |
|
|
ccs_free(printable_argv0); |
673 |
|
|
ccs_free(org_argv0); |
674 |
|
|
} |
675 |
|
|
if (retval) goto out; |
676 |
|
|
} |
677 |
|
|
|
678 |
kumaneko |
183 |
/* Check 'aggregator' directive. */ |
679 |
|
|
{ |
680 |
kumaneko |
214 |
struct aggregator_entry *ptr; |
681 |
kumaneko |
183 |
/* Is this program allowed to be aggregated? */ |
682 |
kumaneko |
722 |
list1_for_each_entry(ptr, &aggregator_list, list) { |
683 |
kumaneko |
183 |
if (ptr->is_deleted || !PathMatchesToPattern(&r, ptr->original_name)) continue; |
684 |
|
|
memset(real_program_name, 0, CCS_MAX_PATHNAME_LEN); |
685 |
|
|
strncpy(real_program_name, ptr->aggregated_name->name, CCS_MAX_PATHNAME_LEN - 1); |
686 |
|
|
fill_path_info(&r); |
687 |
|
|
break; |
688 |
|
|
} |
689 |
|
|
} |
690 |
|
|
|
691 |
kumaneko |
111 |
/* Check execute permission. */ |
692 |
kumaneko |
987 |
if ((retval = CheckExecPerm(&r, bprm)) < 0) goto out; |
693 |
kumaneko |
111 |
|
694 |
kumaneko |
708 |
ok: ; |
695 |
kumaneko |
111 |
/* Allocate memory for calcurating domain name. */ |
696 |
|
|
retval = -ENOMEM; |
697 |
|
|
if ((new_domain_name = ccs_alloc(CCS_MAX_PATHNAME_LEN + 16)) == NULL) goto out; |
698 |
|
|
|
699 |
|
|
if (IsDomainInitializer(old_domain->domainname, &r, &l)) { |
700 |
|
|
/* Transit to the child of KERNEL_DOMAIN domain. */ |
701 |
|
|
snprintf(new_domain_name, CCS_MAX_PATHNAME_LEN + 1, ROOT_NAME " " "%s", real_program_name); |
702 |
|
|
} else if (old_domain == &KERNEL_DOMAIN && !sbin_init_started) { |
703 |
|
|
/* |
704 |
|
|
* Needn't to transit from kernel domain before starting /sbin/init . |
705 |
|
|
* But transit from kernel domain if executing initializers, for they might start before /sbin/init . |
706 |
|
|
*/ |
707 |
|
|
domain = old_domain; |
708 |
|
|
} else if (IsDomainKeeper(old_domain->domainname, &r, &l)) { |
709 |
|
|
/* Keep current domain. */ |
710 |
|
|
domain = old_domain; |
711 |
|
|
} else { |
712 |
|
|
/* Normal domain transition. */ |
713 |
|
|
snprintf(new_domain_name, CCS_MAX_PATHNAME_LEN + 1, "%s %s", old_domain_name, real_program_name); |
714 |
|
|
} |
715 |
|
|
if (!domain && strlen(new_domain_name) < CCS_MAX_PATHNAME_LEN) { |
716 |
|
|
if (is_enforce) { |
717 |
|
|
domain = FindDomain(new_domain_name); |
718 |
|
|
if (!domain) if (CheckSupervisor("#Need to create domain\n%s\n", new_domain_name) == 0) domain = FindOrAssignNewDomain(new_domain_name, current->domain_info->profile); |
719 |
|
|
} else { |
720 |
|
|
domain = FindOrAssignNewDomain(new_domain_name, current->domain_info->profile); |
721 |
|
|
} |
722 |
|
|
} |
723 |
|
|
if (!domain) { |
724 |
|
|
printk("TOMOYO-ERROR: Domain '%s' not defined.\n", new_domain_name); |
725 |
|
|
if (is_enforce) retval = -EPERM; |
726 |
|
|
} else { |
727 |
|
|
retval = 0; |
728 |
|
|
} |
729 |
|
|
out: ; |
730 |
|
|
ccs_free(new_domain_name); |
731 |
|
|
ccs_free(real_program_name); |
732 |
|
|
ccs_free(symlink_program_name); |
733 |
|
|
*next_domain = domain ? domain : old_domain; |
734 |
|
|
return retval; |
735 |
|
|
} |
736 |
|
|
|
737 |
kumaneko |
816 |
static int CheckEnviron(struct linux_binprm *bprm) |
738 |
kumaneko |
581 |
{ |
739 |
kumaneko |
816 |
const u8 profile = current->domain_info->profile; |
740 |
kumaneko |
851 |
const u8 mode = CheckCCSFlags(CCS_TOMOYO_MAC_FOR_ENV); |
741 |
kumaneko |
816 |
char *arg_ptr; |
742 |
kumaneko |
581 |
int arg_len = 0; |
743 |
|
|
unsigned long pos = bprm->p; |
744 |
|
|
int i = pos / PAGE_SIZE, offset = pos % PAGE_SIZE; |
745 |
|
|
int argv_count = bprm->argc; |
746 |
|
|
int envp_count = bprm->envc; |
747 |
|
|
//printk("start %d %d\n", argv_count, envp_count); |
748 |
|
|
int error = -ENOMEM; |
749 |
kumaneko |
816 |
if (!mode || !envp_count) return 0; |
750 |
|
|
arg_ptr = ccs_alloc(CCS_MAX_PATHNAME_LEN); |
751 |
kumaneko |
581 |
if (!arg_ptr) goto out; |
752 |
|
|
while (error == -ENOMEM) { |
753 |
|
|
struct page *page; |
754 |
|
|
const char *kaddr; |
755 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
756 |
|
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) goto out; |
757 |
kumaneko |
986 |
pos += PAGE_SIZE - offset; |
758 |
kumaneko |
581 |
#else |
759 |
|
|
page = bprm->page[i]; |
760 |
kumaneko |
111 |
#endif |
761 |
kumaneko |
581 |
/* Map */ |
762 |
|
|
kaddr = kmap(page); |
763 |
|
|
if (!kaddr) { /* Mapping failed. */ |
764 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
765 |
|
|
put_page(page); |
766 |
|
|
#endif |
767 |
|
|
goto out; |
768 |
|
|
} |
769 |
|
|
/* Read. */ |
770 |
|
|
while (argv_count && offset < PAGE_SIZE) { |
771 |
|
|
if (!kaddr[offset++]) argv_count--; |
772 |
|
|
} |
773 |
|
|
if (argv_count) goto unmap_page; |
774 |
|
|
while (offset < PAGE_SIZE) { |
775 |
|
|
const unsigned char c = kaddr[offset++]; |
776 |
kumaneko |
652 |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
777 |
kumaneko |
581 |
if (c == '=') { |
778 |
|
|
arg_ptr[arg_len++] = '\0'; |
779 |
|
|
} else if (c == '\\') { |
780 |
|
|
arg_ptr[arg_len++] = '\\'; |
781 |
|
|
arg_ptr[arg_len++] = '\\'; |
782 |
|
|
} else if (c > ' ' && c < 127) { |
783 |
|
|
arg_ptr[arg_len++] = c; |
784 |
|
|
} else { |
785 |
|
|
arg_ptr[arg_len++] = '\\'; |
786 |
|
|
arg_ptr[arg_len++] = (c >> 6) + '0'; |
787 |
|
|
arg_ptr[arg_len++] = ((c >> 3) & 7) + '0'; |
788 |
|
|
arg_ptr[arg_len++] = (c & 7) + '0'; |
789 |
|
|
} |
790 |
|
|
} else { |
791 |
|
|
arg_ptr[arg_len] = '\0'; |
792 |
|
|
} |
793 |
|
|
if (c) continue; |
794 |
kumaneko |
815 |
if (CheckEnvPerm(arg_ptr, profile, mode)) { |
795 |
kumaneko |
581 |
error = -EPERM; |
796 |
|
|
break; |
797 |
|
|
} |
798 |
|
|
if (!--envp_count) { |
799 |
|
|
error = 0; |
800 |
|
|
break; |
801 |
|
|
} |
802 |
|
|
arg_len = 0; |
803 |
|
|
} |
804 |
|
|
unmap_page: |
805 |
|
|
/* Unmap. */ |
806 |
|
|
kunmap(page); |
807 |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,23) && defined(CONFIG_MMU) |
808 |
|
|
put_page(page); |
809 |
|
|
#endif |
810 |
|
|
i++; |
811 |
|
|
offset = 0; |
812 |
|
|
} |
813 |
|
|
out: |
814 |
|
|
ccs_free(arg_ptr); |
815 |
kumaneko |
815 |
if (error && mode != 3) error = 0; |
816 |
kumaneko |
581 |
return error; |
817 |
|
|
} |
818 |
kumaneko |
111 |
|
819 |
kumaneko |
708 |
static void UnEscape(unsigned char *dest) |
820 |
|
|
{ |
821 |
|
|
unsigned char *src = dest; |
822 |
|
|
unsigned char c, d, e; |
823 |
|
|
while ((c = *src++) != '\0') { |
824 |
|
|
if (c != '\\') { |
825 |
|
|
*dest++ = c; |
826 |
|
|
continue; |
827 |
|
|
} |
828 |
|
|
c = *src++; |
829 |
|
|
if (c == '\\') { |
830 |
|
|
*dest++ = c; |
831 |
|
|
} else if (c >= '0' && c <= '3' && |
832 |
|
|
(d = *src++) >= '0' && d <= '7' && |
833 |
|
|
(e = *src++) >= '0' && e <= '7') { |
834 |
|
|
*dest++ = ((c - '0') << 6) | ((d - '0') << 3) | (e - '0'); |
835 |
|
|
} else { |
836 |
|
|
break; |
837 |
|
|
} |
838 |
|
|
} |
839 |
|
|
*dest = '\0'; |
840 |
|
|
} |
841 |
|
|
|
842 |
kumaneko |
1005 |
static int try_alt_exec(struct linux_binprm *bprm, char **work) |
843 |
kumaneko |
708 |
{ |
844 |
kumaneko |
1005 |
/* |
845 |
|
|
* Contents of modified bprm. |
846 |
|
|
* The envp[] in original bprm is moved to argv[] so that |
847 |
|
|
* the alternatively executed program won't be affected by |
848 |
|
|
* some dangerous environment variables like LD_PRELOAD . |
849 |
|
|
* |
850 |
|
|
* modified bprm->argc |
851 |
|
|
* = original bprm->argc + original bprm->envc + 7 |
852 |
|
|
* modified bprm->envc |
853 |
|
|
* = 0 |
854 |
|
|
* |
855 |
|
|
* modified bprm->argv[0] |
856 |
|
|
* = the program's name specified by alt_exec |
857 |
|
|
* modified bprm->argv[1] |
858 |
|
|
* = current->domain_info->domainname->name |
859 |
|
|
* modified bprm->argv[2] |
860 |
|
|
* = the current process's name |
861 |
|
|
* modified bprm->argv[3] |
862 |
|
|
* = the current process's information (e.g. uid/gid). |
863 |
|
|
* modified bprm->argv[4] |
864 |
|
|
* = original bprm->filename |
865 |
|
|
* modified bprm->argv[5] |
866 |
|
|
* = original bprm->argc in string expression |
867 |
|
|
* modified bprm->argv[6] |
868 |
|
|
* = original bprm->envc in string expression |
869 |
|
|
* modified bprm->argv[7] |
870 |
|
|
* = original bprm->argv[0] |
871 |
|
|
* ... |
872 |
|
|
* modified bprm->argv[bprm->argc + 6] |
873 |
|
|
* = original bprm->argv[bprm->argc - 1] |
874 |
|
|
* modified bprm->argv[bprm->argc + 7] |
875 |
|
|
* = original bprm->envp[0] |
876 |
|
|
* ... |
877 |
|
|
* modified bprm->argv[bprm->envc + bprm->argc + 6] |
878 |
|
|
* = original bprm->envp[bprm->envc - 1] |
879 |
|
|
*/ |
880 |
kumaneko |
708 |
struct file *filp; |
881 |
|
|
int retval; |
882 |
kumaneko |
1005 |
const int original_argc = bprm->argc; |
883 |
|
|
const int original_envc = bprm->envc; |
884 |
|
|
struct task_struct *task = current; |
885 |
|
|
static const int buffer_len = PAGE_SIZE; |
886 |
|
|
char *buffer = NULL; |
887 |
kumaneko |
708 |
char *alt_exec; |
888 |
|
|
const char *alt_exec1 = GetAltExec(); |
889 |
|
|
if (!alt_exec1 || *alt_exec1 != '/') return -EINVAL; |
890 |
|
|
retval = strlen(alt_exec1) + 1; |
891 |
kumaneko |
1005 |
alt_exec = ccs_alloc(retval); |
892 |
kumaneko |
708 |
if (!alt_exec) return -ENOMEM; |
893 |
kumaneko |
1005 |
*work = alt_exec; |
894 |
kumaneko |
708 |
memmove(alt_exec, alt_exec1, retval); |
895 |
|
|
UnEscape(alt_exec); |
896 |
kumaneko |
1005 |
|
897 |
|
|
/* Close the rejected program's dentry. */ |
898 |
kumaneko |
708 |
allow_write_access(bprm->file); |
899 |
|
|
fput(bprm->file); |
900 |
|
|
bprm->file = NULL; |
901 |
kumaneko |
1005 |
|
902 |
|
|
/* Allocate buffer. */ |
903 |
|
|
buffer = ccs_alloc(buffer_len); |
904 |
|
|
if (!buffer) return -ENOMEM; |
905 |
|
|
|
906 |
|
|
/* Move envp[] to argv[] */ |
907 |
|
|
bprm->argc += bprm->envc; |
908 |
|
|
bprm->envc = 0; |
909 |
|
|
|
910 |
|
|
/* Set argv[6] */ |
911 |
|
|
{ |
912 |
|
|
snprintf(buffer, buffer_len - 1, "%d", original_envc); |
913 |
|
|
retval = copy_strings_kernel(1, &buffer, bprm); |
914 |
|
|
if (retval < 0) goto out; |
915 |
|
|
bprm->argc++; |
916 |
|
|
} |
917 |
|
|
|
918 |
|
|
/* Set argv[5] */ |
919 |
|
|
{ |
920 |
|
|
snprintf(buffer, buffer_len - 1, "%d", original_argc); |
921 |
|
|
retval = copy_strings_kernel(1, &buffer, bprm); |
922 |
|
|
if (retval < 0) goto out; |
923 |
|
|
bprm->argc++; |
924 |
|
|
} |
925 |
|
|
|
926 |
|
|
/* Set argv[4] */ |
927 |
|
|
{ |
928 |
|
|
retval = copy_strings_kernel(1, &bprm->filename, bprm); |
929 |
|
|
if (retval < 0) goto out; |
930 |
|
|
bprm->argc++; |
931 |
|
|
} |
932 |
|
|
|
933 |
|
|
/* Set argv[3] */ |
934 |
|
|
{ |
935 |
|
|
const u32 tomoyo_flags = task->tomoyo_flags; |
936 |
|
|
snprintf(buffer, buffer_len - 1, "pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d sgid=%d fsuid=%d fsgid=%d state[0]=%u state[1]=%u state[2]=%u", task->pid, task->uid, task->gid, task->euid, task->egid, task->suid, task->sgid, task->fsuid, task->fsgid, (u8) (tomoyo_flags >> 24), (u8) (tomoyo_flags >> 16), (u8) (tomoyo_flags >> 8)); |
937 |
|
|
retval = copy_strings_kernel(1, &buffer, bprm); |
938 |
|
|
if (retval < 0) goto out; |
939 |
|
|
bprm->argc++; |
940 |
|
|
} |
941 |
|
|
|
942 |
|
|
/* Set argv[2] */ |
943 |
|
|
{ |
944 |
|
|
char *exe = (char *) GetEXE(); |
945 |
|
|
if (exe) { |
946 |
|
|
retval = copy_strings_kernel(1, &exe, bprm); |
947 |
|
|
ccs_free(exe); |
948 |
|
|
} else { |
949 |
|
|
snprintf(buffer, buffer_len - 1, "<unknown>"); |
950 |
|
|
retval = copy_strings_kernel(1, &buffer, bprm); |
951 |
|
|
} |
952 |
|
|
if (retval < 0) goto out; |
953 |
|
|
bprm->argc++; |
954 |
|
|
} |
955 |
|
|
|
956 |
|
|
/* Set argv[1] */ |
957 |
|
|
{ |
958 |
|
|
strncpy(buffer, task->domain_info->domainname->name, buffer_len - 1); |
959 |
|
|
retval = copy_strings_kernel(1, &buffer, bprm); |
960 |
|
|
if (retval < 0) goto out; |
961 |
|
|
bprm->argc++; |
962 |
|
|
} |
963 |
|
|
|
964 |
|
|
/* Set argv[0] */ |
965 |
|
|
{ |
966 |
|
|
retval = copy_strings_kernel(1, &alt_exec, bprm); |
967 |
|
|
if (retval < 0) goto out; |
968 |
|
|
bprm->argc++; |
969 |
|
|
} |
970 |
kumaneko |
1007 |
#if LINUX_VERSION_CODE == KERNEL_VERSION(2,6,23) || LINUX_VERSION_CODE == KERNEL_VERSION(2,6,24) |
971 |
|
|
bprm->argv_len = bprm->exec - bprm->p; |
972 |
|
|
#endif |
973 |
kumaneko |
1005 |
|
974 |
|
|
/* OK, now restart the process with the alternative program's dentry. */ |
975 |
|
|
filp = open_exec(alt_exec); |
976 |
|
|
if (IS_ERR(filp)) { |
977 |
|
|
retval = PTR_ERR(filp); |
978 |
|
|
goto out; |
979 |
|
|
} |
980 |
|
|
bprm->file= filp; |
981 |
|
|
bprm->filename = alt_exec; |
982 |
kumaneko |
708 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
983 |
|
|
bprm->interp = alt_exec; |
984 |
|
|
#endif |
985 |
kumaneko |
1005 |
retval = 0; |
986 |
|
|
out: |
987 |
|
|
/* Free buffer. */ |
988 |
|
|
ccs_free(buffer); |
989 |
|
|
return retval; |
990 |
kumaneko |
708 |
} |
991 |
kumaneko |
581 |
|
992 |
kumaneko |
115 |
int search_binary_handler_with_transition(struct linux_binprm *bprm, struct pt_regs *regs) |
993 |
|
|
{ |
994 |
|
|
struct domain_info *next_domain = NULL, *prev_domain = current->domain_info; |
995 |
|
|
int retval; |
996 |
kumaneko |
1005 |
char *work = NULL; /* Keep valid until search_binary_handler() finishes. */ |
997 |
kumaneko |
115 |
CCS_LoadPolicy(bprm->filename); |
998 |
kumaneko |
1012 |
if (prev_domain->flags & DOMAIN_FLAGS_FORCE_ALT_EXEC) retval = -EPERM; |
999 |
|
|
else retval = FindNextDomain(bprm, &next_domain, 1); |
1000 |
kumaneko |
1005 |
if (retval == -EPERM && try_alt_exec(bprm, &work) == 0 && prepare_binprm(bprm) >= 0) { |
1001 |
kumaneko |
708 |
current->tomoyo_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1002 |
|
|
retval = FindNextDomain(bprm, &next_domain, 0); |
1003 |
|
|
current->tomoyo_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1004 |
|
|
} |
1005 |
kumaneko |
115 |
if (retval == 0) { |
1006 |
kumaneko |
581 |
current->domain_info = next_domain; |
1007 |
kumaneko |
816 |
retval = CheckEnviron(bprm); |
1008 |
kumaneko |
115 |
current->tomoyo_flags |= TOMOYO_CHECK_READ_FOR_OPEN_EXEC; |
1009 |
kumaneko |
581 |
if (!retval) retval = search_binary_handler(bprm, regs); |
1010 |
|
|
current->tomoyo_flags &= ~TOMOYO_CHECK_READ_FOR_OPEN_EXEC; |
1011 |
kumaneko |
115 |
if (retval < 0) current->domain_info = prev_domain; |
1012 |
|
|
} |
1013 |
kumaneko |
1005 |
ccs_free(work); |
1014 |
kumaneko |
815 |
return retval; |
1015 |
kumaneko |
115 |
} |
1016 |
|
|
|
1017 |
kumaneko |
1015 |
#else |
1018 |
|
|
|
1019 |
|
|
int search_binary_handler_with_transition(struct linux_binprm *bprm, struct pt_regs *regs) |
1020 |
|
|
{ |
1021 |
|
|
#ifdef CONFIG_SAKURA |
1022 |
|
|
CCS_LoadPolicy(bprm->filename); |
1023 |
kumaneko |
1012 |
#endif |
1024 |
kumaneko |
1015 |
return search_binary_handler(bprm, regs); |
1025 |
|
|
} |
1026 |
kumaneko |
1012 |
|
1027 |
kumaneko |
1015 |
#endif |
1028 |
|
|
|
1029 |
kumaneko |
111 |
/***** TOMOYO Linux end. *****/ |