1 |
/* |
/* |
2 |
* fs/tomoyo_domain.c |
* security/ccsecurity/domain.c |
|
* |
|
|
* Implementation of the Domain-Based Mandatory Access Control. |
|
3 |
* |
* |
4 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Version: 1.6.7 2009/04/01 |
* Version: 1.7.1-pre 2009/10/16 |
7 |
* |
* |
8 |
* 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. |
9 |
* See README.ccs for ChangeLog. |
* See README.ccs for ChangeLog. |
10 |
* |
* |
11 |
*/ |
*/ |
12 |
|
|
13 |
#include <linux/ccs_common.h> |
#include <linux/slab.h> |
|
#include <linux/tomoyo.h> |
|
|
#include <linux/realpath.h> |
|
14 |
#include <linux/highmem.h> |
#include <linux/highmem.h> |
15 |
|
#include <linux/version.h> |
16 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
17 |
#include <linux/namei.h> |
#include <linux/namei.h> |
18 |
#include <linux/mount.h> |
#include <linux/mount.h> |
19 |
#endif |
#endif |
20 |
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30) |
21 |
/* For compatibility with older kernels. */ |
#include <linux/fs_struct.h> |
|
#ifndef for_each_process |
|
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#define for_each_process for_each_task |
|
22 |
#endif |
#endif |
23 |
|
#include "internal.h" |
24 |
|
|
25 |
/* Variables definitions.*/ |
/* Variables definitions.*/ |
26 |
|
|
28 |
struct ccs_domain_info ccs_kernel_domain; |
struct ccs_domain_info ccs_kernel_domain; |
29 |
|
|
30 |
/* The list for "struct ccs_domain_info". */ |
/* The list for "struct ccs_domain_info". */ |
31 |
LIST1_HEAD(ccs_domain_list); |
LIST_HEAD(ccs_domain_list); |
|
|
|
|
#ifdef CONFIG_TOMOYO |
|
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|
|
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/* Domain creation lock. */ |
|
|
static DEFINE_MUTEX(ccs_domain_list_lock); |
|
|
|
|
|
/* Structure for "initialize_domain" and "no_initialize_domain" keyword. */ |
|
|
struct ccs_domain_initializer_entry { |
|
|
struct list1_head list; |
|
|
const struct ccs_path_info *domainname; /* This may be NULL */ |
|
|
const struct ccs_path_info *program; |
|
|
bool is_deleted; |
|
|
bool is_not; /* True if this entry is "no_initialize_domain". */ |
|
|
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
|
|
}; |
|
|
|
|
|
/* Structure for "keep_domain" and "no_keep_domain" keyword. */ |
|
|
struct ccs_domain_keeper_entry { |
|
|
struct list1_head list; |
|
|
const struct ccs_path_info *domainname; |
|
|
const struct ccs_path_info *program; /* This may be NULL */ |
|
|
bool is_deleted; |
|
|
bool is_not; /* True if this entry is "no_keep_domain". */ |
|
|
bool is_last_name; /* True if the domainname is ccs_get_last_name(). */ |
|
|
}; |
|
|
|
|
|
/* Structure for "aggregator" keyword. */ |
|
|
struct ccs_aggregator_entry { |
|
|
struct list1_head list; |
|
|
const struct ccs_path_info *original_name; |
|
|
const struct ccs_path_info *aggregated_name; |
|
|
bool is_deleted; |
|
|
}; |
|
|
|
|
|
/* Structure for "alias" keyword. */ |
|
|
struct ccs_alias_entry { |
|
|
struct list1_head list; |
|
|
const struct ccs_path_info *original_name; |
|
|
const struct ccs_path_info *aliased_name; |
|
|
bool is_deleted; |
|
|
}; |
|
|
|
|
|
/** |
|
|
* ccs_set_domain_flag - Set or clear domain's attribute flags. |
|
|
* |
|
|
* @domain: Pointer to "struct ccs_domain_info". |
|
|
* @is_delete: True if it is a delete request. |
|
|
* @flags: Flags to set or clear. |
|
|
* |
|
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* Returns nothing. |
|
|
*/ |
|
|
void ccs_set_domain_flag(struct ccs_domain_info *domain, const bool is_delete, |
|
|
const u8 flags) |
|
|
{ |
|
|
/* We need to serialize because this is bitfield operation. */ |
|
|
static DEFINE_SPINLOCK(lock); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&lock); |
|
|
if (!is_delete) |
|
|
domain->flags |= flags; |
|
|
else |
|
|
domain->flags &= ~flags; |
|
|
spin_unlock(&lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_get_last_name - Get last component of a domainname. |
|
|
* |
|
|
* @domain: Pointer to "struct ccs_domain_info". |
|
|
* |
|
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* Returns the last component of the domainname. |
|
|
*/ |
|
|
const char *ccs_get_last_name(const struct ccs_domain_info *domain) |
|
|
{ |
|
|
const char *cp0 = domain->domainname->name; |
|
|
const char *cp1 = strrchr(cp0, ' '); |
|
|
if (cp1) |
|
|
return cp1 + 1; |
|
|
return cp0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_add_domain_acl - Add the given ACL to the given domain. |
|
|
* |
|
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* @domain: Pointer to "struct ccs_domain_info". May be NULL. |
|
|
* @acl: Pointer to "struct ccs_acl_info". |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
int ccs_add_domain_acl(struct ccs_domain_info *domain, struct ccs_acl_info *acl) |
|
|
{ |
|
|
if (domain) { |
|
|
/* |
|
|
* We need to serialize because this function is called by |
|
|
* various update functions. |
|
|
*/ |
|
|
static DEFINE_SPINLOCK(lock); |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&lock); |
|
|
list1_add_tail_mb(&acl->list, &domain->acl_info_list); |
|
|
spin_unlock(&lock); |
|
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/***** CRITICAL SECTION END *****/ |
|
|
} else { |
|
|
acl->type &= ~ACL_DELETED; |
|
|
} |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_del_domain_acl - Delete the given ACL from the domain. |
|
|
* |
|
|
* @acl: Pointer to "struct ccs_acl_info". May be NULL. |
|
|
* |
|
|
* Returns 0. |
|
|
*/ |
|
|
int ccs_del_domain_acl(struct ccs_acl_info *acl) |
|
|
{ |
|
|
if (acl) |
|
|
acl->type |= ACL_DELETED; |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
|
return 0; |
|
|
} |
|
32 |
|
|
33 |
/** |
/** |
34 |
* ccs_audit_execute_handler_log - Audit execute_handler log. |
* ccs_audit_execute_handler_log - Audit execute_handler log. |
43 |
{ |
{ |
44 |
struct ccs_request_info *r = &ee->r; |
struct ccs_request_info *r = &ee->r; |
45 |
const char *handler = ee->handler->name; |
const char *handler = ee->handler->name; |
46 |
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_FILE); |
r->mode = ccs_get_mode(r->profile, CCS_MAC_FILE_EXECUTE); |
47 |
return ccs_write_audit_log(true, r, "%s %s\n", |
return ccs_write_audit_log(true, r, "%s %s\n", |
48 |
is_default ? KEYWORD_EXECUTE_HANDLER : |
is_default ? CCS_KEYWORD_EXECUTE_HANDLER : |
49 |
KEYWORD_DENIED_EXECUTE_HANDLER, handler); |
CCS_KEYWORD_DENIED_EXECUTE_HANDLER, handler); |
50 |
} |
} |
51 |
|
|
52 |
/** |
/** |
58 |
*/ |
*/ |
59 |
static int ccs_audit_domain_creation_log(struct ccs_domain_info *domain) |
static int ccs_audit_domain_creation_log(struct ccs_domain_info *domain) |
60 |
{ |
{ |
61 |
|
int error; |
62 |
struct ccs_request_info r; |
struct ccs_request_info r; |
63 |
ccs_init_request_info(&r, domain, CCS_MAC_FOR_FILE); |
ccs_init_request_info(&r, domain, CCS_MAC_FILE_EXECUTE); |
64 |
return ccs_write_audit_log(false, &r, "use_profile %u\n", r.profile); |
error = ccs_write_audit_log(false, &r, "use_profile %u\n", r.profile); |
65 |
|
return error; |
66 |
} |
} |
67 |
|
|
68 |
/* The list for "struct ccs_domain_initializer_entry". */ |
/* The list for "struct ccs_domain_initializer_entry". */ |
69 |
static LIST1_HEAD(ccs_domain_initializer_list); |
LIST_HEAD(ccs_domain_initializer_list); |
70 |
|
|
71 |
/** |
/** |
72 |
* ccs_update_domain_initializer_entry - Update "struct ccs_domain_initializer_entry" list. |
* ccs_update_domain_initializer_entry - Update "struct ccs_domain_initializer_entry" list. |
83 |
const bool is_not, |
const bool is_not, |
84 |
const bool is_delete) |
const bool is_delete) |
85 |
{ |
{ |
86 |
struct ccs_domain_initializer_entry *new_entry; |
struct ccs_domain_initializer_entry *entry = NULL; |
87 |
struct ccs_domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
88 |
static DEFINE_MUTEX(lock); |
struct ccs_domain_initializer_entry e = { .is_not = is_not }; |
89 |
const struct ccs_path_info *saved_program; |
int error = is_delete ? -ENOENT : -ENOMEM; |
90 |
const struct ccs_path_info *saved_domainname = NULL; |
if (!ccs_is_correct_path(program, 1, -1, -1)) |
|
int error = -ENOMEM; |
|
|
bool is_last_name = false; |
|
|
if (!ccs_is_correct_path(program, 1, -1, -1, __func__)) |
|
91 |
return -EINVAL; /* No patterns allowed. */ |
return -EINVAL; /* No patterns allowed. */ |
92 |
if (domainname) { |
if (domainname) { |
93 |
if (!ccs_is_domain_def(domainname) && |
if (!ccs_is_domain_def(domainname) && |
94 |
ccs_is_correct_path(domainname, 1, -1, -1, __func__)) |
ccs_is_correct_path(domainname, 1, -1, -1)) |
95 |
is_last_name = true; |
e.is_last_name = true; |
96 |
else if (!ccs_is_correct_domain(domainname, __func__)) |
else if (!ccs_is_correct_domain(domainname)) |
97 |
return -EINVAL; |
return -EINVAL; |
98 |
saved_domainname = ccs_save_name(domainname); |
e.domainname = ccs_get_name(domainname); |
99 |
if (!saved_domainname) |
if (!e.domainname) |
100 |
return -ENOMEM; |
goto out; |
101 |
} |
} |
102 |
saved_program = ccs_save_name(program); |
e.program = ccs_get_name(program); |
103 |
if (!saved_program) |
if (!e.program) |
104 |
return -ENOMEM; |
goto out; |
105 |
mutex_lock(&lock); |
if (!is_delete) |
106 |
list1_for_each_entry(ptr, &ccs_domain_initializer_list, list) { |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
107 |
if (ptr->is_not != is_not || |
mutex_lock(&ccs_policy_lock); |
108 |
ptr->domainname != saved_domainname || |
list_for_each_entry_rcu(ptr, &ccs_domain_initializer_list, list) { |
109 |
ptr->program != saved_program) |
if (ccs_memcmp(ptr, &e, offsetof(typeof(e), is_not), |
110 |
|
sizeof(e))) |
111 |
continue; |
continue; |
112 |
ptr->is_deleted = is_delete; |
ptr->is_deleted = is_delete; |
113 |
error = 0; |
error = 0; |
114 |
goto out; |
break; |
115 |
} |
} |
116 |
if (is_delete) { |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
117 |
error = -ENOENT; |
list_add_tail_rcu(&entry->list, &ccs_domain_initializer_list); |
118 |
goto out; |
entry = NULL; |
119 |
|
error = 0; |
120 |
} |
} |
121 |
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
mutex_unlock(&ccs_policy_lock); |
|
if (!new_entry) |
|
|
goto out; |
|
|
new_entry->domainname = saved_domainname; |
|
|
new_entry->program = saved_program; |
|
|
new_entry->is_not = is_not; |
|
|
new_entry->is_last_name = is_last_name; |
|
|
list1_add_tail_mb(&new_entry->list, &ccs_domain_initializer_list); |
|
|
error = 0; |
|
122 |
out: |
out: |
123 |
mutex_unlock(&lock); |
ccs_put_name(e.domainname); |
124 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
ccs_put_name(e.program); |
125 |
|
kfree(entry); |
126 |
return error; |
return error; |
127 |
} |
} |
128 |
|
|
132 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
133 |
* |
* |
134 |
* Returns true on success, false otherwise. |
* Returns true on success, false otherwise. |
135 |
|
* |
136 |
|
* Caller holds ccs_read_lock(). |
137 |
*/ |
*/ |
138 |
bool ccs_read_domain_initializer_policy(struct ccs_io_buffer *head) |
bool ccs_read_domain_initializer_policy(struct ccs_io_buffer *head) |
139 |
{ |
{ |
140 |
struct list1_head *pos; |
struct list_head *pos; |
141 |
list1_for_each_cookie(pos, head->read_var2, |
bool done = true; |
142 |
&ccs_domain_initializer_list) { |
list_for_each_cookie(pos, head->read_var2, |
143 |
|
&ccs_domain_initializer_list) { |
144 |
const char *no; |
const char *no; |
145 |
const char *from = ""; |
const char *from = ""; |
146 |
const char *domain = ""; |
const char *domain = ""; |
147 |
struct ccs_domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
148 |
ptr = list1_entry(pos, struct ccs_domain_initializer_entry, |
ptr = list_entry(pos, struct ccs_domain_initializer_entry, |
149 |
list); |
list); |
150 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
151 |
continue; |
continue; |
152 |
no = ptr->is_not ? "no_" : ""; |
no = ptr->is_not ? "no_" : ""; |
154 |
from = " from "; |
from = " from "; |
155 |
domain = ptr->domainname->name; |
domain = ptr->domainname->name; |
156 |
} |
} |
157 |
if (!ccs_io_printf(head, |
done = ccs_io_printf(head, "%s" CCS_KEYWORD_INITIALIZE_DOMAIN |
158 |
"%s" KEYWORD_INITIALIZE_DOMAIN "%s%s%s\n", |
"%s%s%s\n", no, ptr->program->name, from, |
159 |
no, ptr->program->name, from, domain)) |
domain); |
160 |
goto out; |
if (!done) |
161 |
|
break; |
162 |
} |
} |
163 |
return true; |
return done; |
|
out: |
|
|
return false; |
|
164 |
} |
} |
165 |
|
|
166 |
/** |
/** |
194 |
* |
* |
195 |
* Returns true if executing @program reinitializes domain transition, |
* Returns true if executing @program reinitializes domain transition, |
196 |
* false otherwise. |
* false otherwise. |
197 |
|
* |
198 |
|
* Caller holds ccs_read_lock(). |
199 |
*/ |
*/ |
200 |
static bool ccs_is_domain_initializer(const struct ccs_path_info *domainname, |
static bool ccs_is_domain_initializer(const struct ccs_path_info *domainname, |
201 |
const struct ccs_path_info *program, |
const struct ccs_path_info *program, |
203 |
{ |
{ |
204 |
struct ccs_domain_initializer_entry *ptr; |
struct ccs_domain_initializer_entry *ptr; |
205 |
bool flag = false; |
bool flag = false; |
206 |
list1_for_each_entry(ptr, &ccs_domain_initializer_list, list) { |
list_for_each_entry_rcu(ptr, &ccs_domain_initializer_list, list) { |
207 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
208 |
continue; |
continue; |
209 |
if (ptr->domainname) { |
if (ptr->domainname) { |
217 |
} |
} |
218 |
if (ccs_pathcmp(ptr->program, program)) |
if (ccs_pathcmp(ptr->program, program)) |
219 |
continue; |
continue; |
220 |
if (ptr->is_not) |
if (ptr->is_not) { |
221 |
return false; |
flag = false; |
222 |
|
break; |
223 |
|
} |
224 |
flag = true; |
flag = true; |
225 |
} |
} |
226 |
return flag; |
return flag; |
227 |
} |
} |
228 |
|
|
229 |
/* The list for "struct ccs_domain_keeper_entry". */ |
/* The list for "struct ccs_domain_keeper_entry". */ |
230 |
static LIST1_HEAD(ccs_domain_keeper_list); |
LIST_HEAD(ccs_domain_keeper_list); |
231 |
|
|
232 |
/** |
/** |
233 |
* ccs_update_domain_keeper_entry - Update "struct ccs_domain_keeper_entry" list. |
* ccs_update_domain_keeper_entry - Update "struct ccs_domain_keeper_entry" list. |
244 |
const bool is_not, |
const bool is_not, |
245 |
const bool is_delete) |
const bool is_delete) |
246 |
{ |
{ |
247 |
struct ccs_domain_keeper_entry *new_entry; |
struct ccs_domain_keeper_entry *entry = NULL; |
248 |
struct ccs_domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *ptr; |
249 |
const struct ccs_path_info *saved_domainname; |
struct ccs_domain_keeper_entry e = { .is_not = is_not }; |
250 |
const struct ccs_path_info *saved_program = NULL; |
int error = is_delete ? -ENOENT : -ENOMEM; |
|
static DEFINE_MUTEX(lock); |
|
|
int error = -ENOMEM; |
|
|
bool is_last_name = false; |
|
251 |
if (!ccs_is_domain_def(domainname) && |
if (!ccs_is_domain_def(domainname) && |
252 |
ccs_is_correct_path(domainname, 1, -1, -1, __func__)) |
ccs_is_correct_path(domainname, 1, -1, -1)) |
253 |
is_last_name = true; |
e.is_last_name = true; |
254 |
else if (!ccs_is_correct_domain(domainname, __func__)) |
else if (!ccs_is_correct_domain(domainname)) |
255 |
return -EINVAL; |
return -EINVAL; |
256 |
if (program) { |
if (program) { |
257 |
if (!ccs_is_correct_path(program, 1, -1, -1, __func__)) |
if (!ccs_is_correct_path(program, 1, -1, -1)) |
258 |
return -EINVAL; |
return -EINVAL; |
259 |
saved_program = ccs_save_name(program); |
e.program = ccs_get_name(program); |
260 |
if (!saved_program) |
if (!e.program) |
261 |
return -ENOMEM; |
goto out; |
262 |
} |
} |
263 |
saved_domainname = ccs_save_name(domainname); |
e.domainname = ccs_get_name(domainname); |
264 |
if (!saved_domainname) |
if (!e.domainname) |
265 |
return -ENOMEM; |
goto out; |
266 |
mutex_lock(&lock); |
if (!is_delete) |
267 |
list1_for_each_entry(ptr, &ccs_domain_keeper_list, list) { |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
268 |
if (ptr->is_not != is_not || |
mutex_lock(&ccs_policy_lock); |
269 |
ptr->domainname != saved_domainname || |
list_for_each_entry_rcu(ptr, &ccs_domain_keeper_list, list) { |
270 |
ptr->program != saved_program) |
if (ccs_memcmp(ptr, &e, offsetof(typeof(e), is_not), |
271 |
|
sizeof(e))) |
272 |
continue; |
continue; |
273 |
ptr->is_deleted = is_delete; |
ptr->is_deleted = is_delete; |
274 |
error = 0; |
error = 0; |
275 |
goto out; |
break; |
276 |
} |
} |
277 |
if (is_delete) { |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
278 |
error = -ENOENT; |
list_add_tail_rcu(&entry->list, &ccs_domain_keeper_list); |
279 |
goto out; |
entry = NULL; |
280 |
|
error = 0; |
281 |
} |
} |
282 |
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
mutex_unlock(&ccs_policy_lock); |
|
if (!new_entry) |
|
|
goto out; |
|
|
new_entry->domainname = saved_domainname; |
|
|
new_entry->program = saved_program; |
|
|
new_entry->is_not = is_not; |
|
|
new_entry->is_last_name = is_last_name; |
|
|
list1_add_tail_mb(&new_entry->list, &ccs_domain_keeper_list); |
|
|
error = 0; |
|
283 |
out: |
out: |
284 |
mutex_unlock(&lock); |
ccs_put_name(e.domainname); |
285 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
ccs_put_name(e.program); |
286 |
|
kfree(entry); |
287 |
return error; |
return error; |
288 |
} |
} |
289 |
|
|
313 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
314 |
* |
* |
315 |
* Returns true on success, false otherwise. |
* Returns true on success, false otherwise. |
316 |
|
* |
317 |
|
* Caller holds ccs_read_lock(). |
318 |
*/ |
*/ |
319 |
bool ccs_read_domain_keeper_policy(struct ccs_io_buffer *head) |
bool ccs_read_domain_keeper_policy(struct ccs_io_buffer *head) |
320 |
{ |
{ |
321 |
struct list1_head *pos; |
struct list_head *pos; |
322 |
list1_for_each_cookie(pos, head->read_var2, &ccs_domain_keeper_list) { |
bool done = true; |
323 |
|
list_for_each_cookie(pos, head->read_var2, |
324 |
|
&ccs_domain_keeper_list) { |
325 |
struct ccs_domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *ptr; |
326 |
const char *no; |
const char *no; |
327 |
const char *from = ""; |
const char *from = ""; |
328 |
const char *program = ""; |
const char *program = ""; |
329 |
ptr = list1_entry(pos, struct ccs_domain_keeper_entry, list); |
ptr = list_entry(pos, struct ccs_domain_keeper_entry, list); |
330 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
331 |
continue; |
continue; |
332 |
no = ptr->is_not ? "no_" : ""; |
no = ptr->is_not ? "no_" : ""; |
334 |
from = " from "; |
from = " from "; |
335 |
program = ptr->program->name; |
program = ptr->program->name; |
336 |
} |
} |
337 |
if (!ccs_io_printf(head, |
done = ccs_io_printf(head, "%s" CCS_KEYWORD_KEEP_DOMAIN |
338 |
"%s" KEYWORD_KEEP_DOMAIN "%s%s%s\n", no, |
"%s%s%s\n", no, program, from, |
339 |
program, from, ptr->domainname->name)) |
ptr->domainname->name); |
340 |
goto out; |
if (!done) |
341 |
|
break; |
342 |
} |
} |
343 |
return true; |
return done; |
|
out: |
|
|
return false; |
|
344 |
} |
} |
345 |
|
|
346 |
/** |
/** |
352 |
* |
* |
353 |
* Returns true if executing @program supresses domain transition, |
* Returns true if executing @program supresses domain transition, |
354 |
* false otherwise. |
* false otherwise. |
355 |
|
* |
356 |
|
* Caller holds ccs_read_lock(). |
357 |
*/ |
*/ |
358 |
static bool ccs_is_domain_keeper(const struct ccs_path_info *domainname, |
static bool ccs_is_domain_keeper(const struct ccs_path_info *domainname, |
359 |
const struct ccs_path_info *program, |
const struct ccs_path_info *program, |
361 |
{ |
{ |
362 |
struct ccs_domain_keeper_entry *ptr; |
struct ccs_domain_keeper_entry *ptr; |
363 |
bool flag = false; |
bool flag = false; |
364 |
list1_for_each_entry(ptr, &ccs_domain_keeper_list, list) { |
list_for_each_entry_rcu(ptr, &ccs_domain_keeper_list, list) { |
365 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
366 |
continue; |
continue; |
367 |
if (!ptr->is_last_name) { |
if (!ptr->is_last_name) { |
373 |
} |
} |
374 |
if (ptr->program && ccs_pathcmp(ptr->program, program)) |
if (ptr->program && ccs_pathcmp(ptr->program, program)) |
375 |
continue; |
continue; |
376 |
if (ptr->is_not) |
if (ptr->is_not) { |
377 |
return false; |
flag = false; |
378 |
|
break; |
379 |
|
} |
380 |
flag = true; |
flag = true; |
381 |
} |
} |
382 |
return flag; |
return flag; |
383 |
} |
} |
384 |
|
|
|
/* The list for "struct ccs_alias_entry". */ |
|
|
static LIST1_HEAD(ccs_alias_list); |
|
|
|
|
|
/** |
|
|
* ccs_update_alias_entry - Update "struct ccs_alias_entry" list. |
|
|
* |
|
|
* @original_name: The original program's real name. |
|
|
* @aliased_name: The symbolic program's symbolic link's name. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
static int ccs_update_alias_entry(const char *original_name, |
|
|
const char *aliased_name, |
|
|
const bool is_delete) |
|
|
{ |
|
|
struct ccs_alias_entry *new_entry; |
|
|
struct ccs_alias_entry *ptr; |
|
|
static DEFINE_MUTEX(lock); |
|
|
const struct ccs_path_info *saved_original_name; |
|
|
const struct ccs_path_info *saved_aliased_name; |
|
|
int error = -ENOMEM; |
|
|
if (!ccs_is_correct_path(original_name, 1, -1, -1, __func__) || |
|
|
!ccs_is_correct_path(aliased_name, 1, -1, -1, __func__)) |
|
|
return -EINVAL; /* No patterns allowed. */ |
|
|
saved_original_name = ccs_save_name(original_name); |
|
|
saved_aliased_name = ccs_save_name(aliased_name); |
|
|
if (!saved_original_name || !saved_aliased_name) |
|
|
return -ENOMEM; |
|
|
mutex_lock(&lock); |
|
|
list1_for_each_entry(ptr, &ccs_alias_list, list) { |
|
|
if (ptr->original_name != saved_original_name || |
|
|
ptr->aliased_name != saved_aliased_name) |
|
|
continue; |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
goto out; |
|
|
} |
|
|
if (is_delete) { |
|
|
error = -ENOENT; |
|
|
goto out; |
|
|
} |
|
|
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
|
|
if (!new_entry) |
|
|
goto out; |
|
|
new_entry->original_name = saved_original_name; |
|
|
new_entry->aliased_name = saved_aliased_name; |
|
|
list1_add_tail_mb(&new_entry->list, &ccs_alias_list); |
|
|
error = 0; |
|
|
out: |
|
|
mutex_unlock(&lock); |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
|
|
return error; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_read_alias_policy - Read "struct ccs_alias_entry" list. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
bool ccs_read_alias_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list1_head *pos; |
|
|
list1_for_each_cookie(pos, head->read_var2, &ccs_alias_list) { |
|
|
struct ccs_alias_entry *ptr; |
|
|
ptr = list1_entry(pos, struct ccs_alias_entry, list); |
|
|
if (ptr->is_deleted) |
|
|
continue; |
|
|
if (!ccs_io_printf(head, KEYWORD_ALIAS "%s %s\n", |
|
|
ptr->original_name->name, |
|
|
ptr->aliased_name->name)) |
|
|
goto out; |
|
|
} |
|
|
return true; |
|
|
out: |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_write_alias_policy - Write "struct ccs_alias_entry" list. |
|
|
* |
|
|
* @data: String to parse. |
|
|
* @is_delete: True if it is a delete request. |
|
|
* |
|
|
* Returns 0 on success, negative value otherwise. |
|
|
*/ |
|
|
int ccs_write_alias_policy(char *data, const bool is_delete) |
|
|
{ |
|
|
char *cp = strchr(data, ' '); |
|
|
if (!cp) |
|
|
return -EINVAL; |
|
|
*cp++ = '\0'; |
|
|
return ccs_update_alias_entry(data, cp, is_delete); |
|
|
} |
|
|
|
|
385 |
/* The list for "struct ccs_aggregator_entry". */ |
/* The list for "struct ccs_aggregator_entry". */ |
386 |
static LIST1_HEAD(ccs_aggregator_list); |
LIST_HEAD(ccs_aggregator_list); |
387 |
|
|
388 |
/** |
/** |
389 |
* ccs_update_aggregator_entry - Update "struct ccs_aggregator_entry" list. |
* ccs_update_aggregator_entry - Update "struct ccs_aggregator_entry" list. |
398 |
const char *aggregated_name, |
const char *aggregated_name, |
399 |
const bool is_delete) |
const bool is_delete) |
400 |
{ |
{ |
401 |
struct ccs_aggregator_entry *new_entry; |
struct ccs_aggregator_entry *entry = NULL; |
402 |
struct ccs_aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
403 |
static DEFINE_MUTEX(lock); |
struct ccs_aggregator_entry e = { }; |
404 |
const struct ccs_path_info *saved_original_name; |
int error = is_delete ? -ENOENT : -ENOMEM; |
405 |
const struct ccs_path_info *saved_aggregated_name; |
if (!ccs_is_correct_path(original_name, 1, 0, -1) || |
406 |
int error = -ENOMEM; |
!ccs_is_correct_path(aggregated_name, 1, -1, -1)) |
|
if (!ccs_is_correct_path(original_name, 1, 0, -1, __func__) || |
|
|
!ccs_is_correct_path(aggregated_name, 1, -1, -1, __func__)) |
|
407 |
return -EINVAL; |
return -EINVAL; |
408 |
saved_original_name = ccs_save_name(original_name); |
e.original_name = ccs_get_name(original_name); |
409 |
saved_aggregated_name = ccs_save_name(aggregated_name); |
e.aggregated_name = ccs_get_name(aggregated_name); |
410 |
if (!saved_original_name || !saved_aggregated_name) |
if (!e.original_name || !e.aggregated_name) |
411 |
return -ENOMEM; |
goto out; |
412 |
mutex_lock(&lock); |
if (!is_delete) |
413 |
list1_for_each_entry(ptr, &ccs_aggregator_list, list) { |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
414 |
if (ptr->original_name != saved_original_name || |
mutex_lock(&ccs_policy_lock); |
415 |
ptr->aggregated_name != saved_aggregated_name) |
list_for_each_entry_rcu(ptr, &ccs_aggregator_list, list) { |
416 |
|
if (ccs_memcmp(ptr, &e, offsetof(typeof(e), original_name), |
417 |
|
sizeof(e))) |
418 |
continue; |
continue; |
419 |
ptr->is_deleted = is_delete; |
ptr->is_deleted = is_delete; |
420 |
error = 0; |
error = 0; |
421 |
goto out; |
break; |
422 |
} |
} |
423 |
if (is_delete) { |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
424 |
error = -ENOENT; |
list_add_tail_rcu(&entry->list, &ccs_aggregator_list); |
425 |
goto out; |
entry = NULL; |
426 |
|
error = 0; |
427 |
} |
} |
428 |
new_entry = ccs_alloc_element(sizeof(*new_entry)); |
mutex_unlock(&ccs_policy_lock); |
|
if (!new_entry) |
|
|
goto out; |
|
|
new_entry->original_name = saved_original_name; |
|
|
new_entry->aggregated_name = saved_aggregated_name; |
|
|
list1_add_tail_mb(&new_entry->list, &ccs_aggregator_list); |
|
|
error = 0; |
|
429 |
out: |
out: |
430 |
mutex_unlock(&lock); |
ccs_put_name(e.original_name); |
431 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
ccs_put_name(e.aggregated_name); |
432 |
|
kfree(entry); |
433 |
return error; |
return error; |
434 |
} |
} |
435 |
|
|
439 |
* @head: Pointer to "struct ccs_io_buffer". |
* @head: Pointer to "struct ccs_io_buffer". |
440 |
* |
* |
441 |
* Returns true on success, false otherwise. |
* Returns true on success, false otherwise. |
442 |
|
* |
443 |
|
* Caller holds ccs_read_lock(). |
444 |
*/ |
*/ |
445 |
bool ccs_read_aggregator_policy(struct ccs_io_buffer *head) |
bool ccs_read_aggregator_policy(struct ccs_io_buffer *head) |
446 |
{ |
{ |
447 |
struct list1_head *pos; |
struct list_head *pos; |
448 |
list1_for_each_cookie(pos, head->read_var2, &ccs_aggregator_list) { |
bool done = true; |
449 |
|
list_for_each_cookie(pos, head->read_var2, &ccs_aggregator_list) { |
450 |
struct ccs_aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
451 |
ptr = list1_entry(pos, struct ccs_aggregator_entry, list); |
ptr = list_entry(pos, struct ccs_aggregator_entry, list); |
452 |
if (ptr->is_deleted) |
if (ptr->is_deleted) |
453 |
continue; |
continue; |
454 |
if (!ccs_io_printf(head, KEYWORD_AGGREGATOR "%s %s\n", |
done = ccs_io_printf(head, CCS_KEYWORD_AGGREGATOR "%s %s\n", |
455 |
ptr->original_name->name, |
ptr->original_name->name, |
456 |
ptr->aggregated_name->name)) |
ptr->aggregated_name->name); |
457 |
goto out; |
if (!done) |
458 |
|
break; |
459 |
} |
} |
460 |
return true; |
return done; |
|
out: |
|
|
return false; |
|
461 |
} |
} |
462 |
|
|
463 |
/** |
/** |
470 |
*/ |
*/ |
471 |
int ccs_write_aggregator_policy(char *data, const bool is_delete) |
int ccs_write_aggregator_policy(char *data, const bool is_delete) |
472 |
{ |
{ |
473 |
char *cp = strchr(data, ' '); |
char *w[2]; |
474 |
if (!cp) |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[1][0]) |
475 |
return -EINVAL; |
return -EINVAL; |
476 |
*cp++ = '\0'; |
return ccs_update_aggregator_entry(w[0], w[1], is_delete); |
|
return ccs_update_aggregator_entry(data, cp, is_delete); |
|
477 |
} |
} |
478 |
|
|
479 |
/* Domain create/delete handler. */ |
/* Domain create/delete handler. */ |
491 |
struct ccs_path_info name; |
struct ccs_path_info name; |
492 |
name.name = domainname; |
name.name = domainname; |
493 |
ccs_fill_path_info(&name); |
ccs_fill_path_info(&name); |
494 |
mutex_lock(&ccs_domain_list_lock); |
mutex_lock(&ccs_policy_lock); |
495 |
/* Is there an active domain? */ |
/* Is there an active domain? */ |
496 |
list1_for_each_entry(domain, &ccs_domain_list, list) { |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
497 |
/* Never delete ccs_kernel_domain */ |
/* Never delete ccs_kernel_domain */ |
498 |
if (domain == &ccs_kernel_domain) |
if (domain == &ccs_kernel_domain) |
499 |
continue; |
continue; |
503 |
domain->is_deleted = true; |
domain->is_deleted = true; |
504 |
break; |
break; |
505 |
} |
} |
506 |
mutex_unlock(&ccs_domain_list_lock); |
mutex_unlock(&ccs_policy_lock); |
507 |
return 0; |
return 0; |
508 |
} |
} |
509 |
|
|
516 |
* Returns pointer to "struct ccs_domain_info" on success, NULL otherwise. |
* Returns pointer to "struct ccs_domain_info" on success, NULL otherwise. |
517 |
*/ |
*/ |
518 |
struct ccs_domain_info *ccs_find_or_assign_new_domain(const char *domainname, |
struct ccs_domain_info *ccs_find_or_assign_new_domain(const char *domainname, |
519 |
const u8 profile) |
const u8 profile) |
520 |
{ |
{ |
521 |
struct ccs_domain_info *domain = NULL; |
struct ccs_domain_info *entry; |
522 |
|
struct ccs_domain_info *domain; |
523 |
const struct ccs_path_info *saved_domainname; |
const struct ccs_path_info *saved_domainname; |
524 |
mutex_lock(&ccs_domain_list_lock); |
bool found = false; |
525 |
domain = ccs_find_domain(domainname); |
|
526 |
if (domain) |
if (!ccs_is_correct_domain(domainname)) |
527 |
goto out; |
return NULL; |
528 |
if (!ccs_is_correct_domain(domainname, __func__)) |
saved_domainname = ccs_get_name(domainname); |
|
goto out; |
|
|
saved_domainname = ccs_save_name(domainname); |
|
529 |
if (!saved_domainname) |
if (!saved_domainname) |
530 |
goto out; |
return NULL; |
531 |
/* Can I reuse memory of deleted domain? */ |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
532 |
list1_for_each_entry(domain, &ccs_domain_list, list) { |
mutex_lock(&ccs_policy_lock); |
533 |
struct task_struct *p; |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
534 |
struct ccs_acl_info *ptr; |
if (domain->is_deleted || |
535 |
bool flag; |
ccs_pathcmp(saved_domainname, domain->domainname)) |
|
if (!domain->is_deleted || |
|
|
domain->domainname != saved_domainname) |
|
|
continue; |
|
|
flag = false; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
read_lock(&tasklist_lock); |
|
|
for_each_process(p) { |
|
|
if (ccs_task_domain(p) != domain) |
|
|
continue; |
|
|
flag = true; |
|
|
break; |
|
|
} |
|
|
read_unlock(&tasklist_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
if (flag) |
|
536 |
continue; |
continue; |
537 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
found = true; |
538 |
ptr->type |= ACL_DELETED; |
break; |
|
} |
|
|
ccs_set_domain_flag(domain, true, domain->flags); |
|
|
domain->profile = profile; |
|
|
domain->quota_warned = false; |
|
|
mb(); /* Avoid out-of-order execution. */ |
|
|
domain->is_deleted = false; |
|
|
goto out; |
|
|
} |
|
|
/* No memory reusable. Create using new memory. */ |
|
|
domain = ccs_alloc_element(sizeof(*domain)); |
|
|
if (domain) { |
|
|
INIT_LIST1_HEAD(&domain->acl_info_list); |
|
|
domain->domainname = saved_domainname; |
|
|
domain->profile = profile; |
|
|
list1_add_tail_mb(&domain->list, &ccs_domain_list); |
|
|
} |
|
|
out: |
|
|
mutex_unlock(&ccs_domain_list_lock); |
|
|
return domain; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_get_argv0 - Get argv[0]. |
|
|
* |
|
|
* @ee: Pointer to "struct ccs_execve_entry". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
*/ |
|
|
static bool ccs_get_argv0(struct ccs_execve_entry *ee) |
|
|
{ |
|
|
struct linux_binprm *bprm = ee->bprm; |
|
|
char *arg_ptr = ee->tmp; |
|
|
int arg_len = 0; |
|
|
unsigned long pos = bprm->p; |
|
|
int offset = pos % PAGE_SIZE; |
|
|
bool done = false; |
|
|
if (!bprm->argc) |
|
|
goto out; |
|
|
while (1) { |
|
|
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
|
|
goto out; |
|
|
pos += PAGE_SIZE - offset; |
|
|
/* Read. */ |
|
|
while (offset < PAGE_SIZE) { |
|
|
const char *kaddr = ee->dump.data; |
|
|
const unsigned char c = kaddr[offset++]; |
|
|
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
|
|
if (c == '\\') { |
|
|
arg_ptr[arg_len++] = '\\'; |
|
|
arg_ptr[arg_len++] = '\\'; |
|
|
} else if (c == '/') { |
|
|
arg_len = 0; |
|
|
} else if (c > ' ' && c < 127) { |
|
|
arg_ptr[arg_len++] = c; |
|
|
} else { |
|
|
arg_ptr[arg_len++] = '\\'; |
|
|
arg_ptr[arg_len++] = (c >> 6) + '0'; |
|
|
arg_ptr[arg_len++] |
|
|
= ((c >> 3) & 7) + '0'; |
|
|
arg_ptr[arg_len++] = (c & 7) + '0'; |
|
|
} |
|
|
} else { |
|
|
arg_ptr[arg_len] = '\0'; |
|
|
done = true; |
|
|
break; |
|
|
} |
|
|
} |
|
|
offset = 0; |
|
|
if (done) |
|
|
break; |
|
539 |
} |
} |
540 |
return true; |
if (!found && ccs_memory_ok(entry, sizeof(*entry))) { |
541 |
out: |
INIT_LIST_HEAD(&entry->acl_info_list); |
542 |
return false; |
entry->domainname = saved_domainname; |
543 |
|
saved_domainname = NULL; |
544 |
|
entry->profile = profile; |
545 |
|
list_add_tail_rcu(&entry->list, &ccs_domain_list); |
546 |
|
domain = entry; |
547 |
|
entry = NULL; |
548 |
|
found = true; |
549 |
|
} |
550 |
|
mutex_unlock(&ccs_policy_lock); |
551 |
|
ccs_put_name(saved_domainname); |
552 |
|
kfree(entry); |
553 |
|
return found ? domain : NULL; |
554 |
} |
} |
555 |
|
|
556 |
/** |
/** |
559 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve_entry". |
560 |
* |
* |
561 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
562 |
|
* |
563 |
|
* Caller holds ccs_read_lock(). |
564 |
*/ |
*/ |
565 |
static int ccs_find_next_domain(struct ccs_execve_entry *ee) |
static int ccs_find_next_domain(struct ccs_execve_entry *ee) |
566 |
{ |
{ |
569 |
struct ccs_domain_info *domain = NULL; |
struct ccs_domain_info *domain = NULL; |
570 |
const char *old_domain_name = r->domain->domainname->name; |
const char *old_domain_name = r->domain->domainname->name; |
571 |
struct linux_binprm *bprm = ee->bprm; |
struct linux_binprm *bprm = ee->bprm; |
|
const u8 mode = r->mode; |
|
|
const bool is_enforce = (mode == 3); |
|
572 |
const u32 ccs_flags = current->ccs_flags; |
const u32 ccs_flags = current->ccs_flags; |
573 |
char *new_domain_name = NULL; |
struct ccs_path_info rn = { }; /* real name */ |
|
struct ccs_path_info rn; /* real name */ |
|
|
struct ccs_path_info sn; /* symlink name */ |
|
574 |
struct ccs_path_info ln; /* last name */ |
struct ccs_path_info ln; /* last name */ |
575 |
int retval; |
int retval; |
576 |
|
bool need_kfree = false; |
577 |
|
ln.name = ccs_last_word(old_domain_name); |
578 |
|
ccs_fill_path_info(&ln); |
579 |
retry: |
retry: |
580 |
current->ccs_flags = ccs_flags; |
current->ccs_flags = ccs_flags; |
581 |
r->cond = NULL; |
r->cond = NULL; |
582 |
/* Get realpath of program and symbolic link. */ |
if (need_kfree) { |
583 |
retval = ccs_realpath_both(bprm->filename, ee); |
kfree(rn.name); |
584 |
|
need_kfree = false; |
585 |
|
} |
586 |
|
|
587 |
|
/* Get symlink's pathname of program. */ |
588 |
|
retval = ccs_symlink_path(bprm->filename, &rn); |
589 |
if (retval < 0) |
if (retval < 0) |
590 |
goto out; |
goto out; |
591 |
|
need_kfree = true; |
|
rn.name = ee->program_path; |
|
|
ccs_fill_path_info(&rn); |
|
|
sn.name = ee->tmp; |
|
|
ccs_fill_path_info(&sn); |
|
|
ln.name = ccs_get_last_name(r->domain); |
|
|
ccs_fill_path_info(&ln); |
|
592 |
|
|
593 |
if (handler) { |
if (handler) { |
594 |
if (ccs_pathcmp(&rn, handler)) { |
if (ccs_pathcmp(&rn, handler)) { |
601 |
} |
} |
602 |
goto out; |
goto out; |
603 |
} |
} |
604 |
goto calculate_domain; |
} else { |
|
} |
|
|
|
|
|
/* Check 'alias' directive. */ |
|
|
if (ccs_pathcmp(&rn, &sn)) { |
|
|
struct ccs_alias_entry *ptr; |
|
|
/* Is this program allowed to be called via symbolic links? */ |
|
|
list1_for_each_entry(ptr, &ccs_alias_list, list) { |
|
|
if (ptr->is_deleted || |
|
|
ccs_pathcmp(&rn, ptr->original_name) || |
|
|
ccs_pathcmp(&sn, ptr->aliased_name)) |
|
|
continue; |
|
|
strncpy(ee->program_path, ptr->aliased_name->name, |
|
|
CCS_MAX_PATHNAME_LEN - 1); |
|
|
ccs_fill_path_info(&rn); |
|
|
break; |
|
|
} |
|
|
} |
|
|
/* sn will be overwritten after here. */ |
|
|
|
|
|
/* Compare basename of program_path and argv[0] */ |
|
|
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_ARGV0); |
|
|
if (bprm->argc > 0 && r->mode) { |
|
|
char *base_argv0 = ee->tmp; |
|
|
const char *base_filename; |
|
|
retval = -ENOMEM; |
|
|
if (!ccs_get_argv0(ee)) |
|
|
goto out; |
|
|
base_filename = strrchr(ee->program_path, '/'); |
|
|
if (!base_filename) |
|
|
base_filename = ee->program_path; |
|
|
else |
|
|
base_filename++; |
|
|
if (strcmp(base_argv0, base_filename)) { |
|
|
retval = ccs_check_argv0_perm(r, &rn, base_argv0); |
|
|
if (retval == 1) |
|
|
goto retry; |
|
|
if (retval < 0) |
|
|
goto out; |
|
|
} |
|
|
} |
|
|
|
|
|
/* Check 'aggregator' directive. */ |
|
|
{ |
|
605 |
struct ccs_aggregator_entry *ptr; |
struct ccs_aggregator_entry *ptr; |
606 |
/* Is this program allowed to be aggregated? */ |
/* Check 'aggregator' directive. */ |
607 |
list1_for_each_entry(ptr, &ccs_aggregator_list, list) { |
list_for_each_entry_rcu(ptr, &ccs_aggregator_list, list) { |
608 |
if (ptr->is_deleted || |
if (ptr->is_deleted || |
609 |
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
610 |
continue; |
continue; |
611 |
strncpy(ee->program_path, ptr->aggregated_name->name, |
kfree(rn.name); |
612 |
CCS_MAX_PATHNAME_LEN - 1); |
need_kfree = false; |
613 |
ccs_fill_path_info(&rn); |
/* This is OK because it is read only. */ |
614 |
|
rn = *ptr->aggregated_name; |
615 |
break; |
break; |
616 |
} |
} |
|
} |
|
617 |
|
|
618 |
/* Check execute permission. */ |
/* Check execute permission. */ |
619 |
r->mode = mode; |
retval = ccs_exec_perm(r, &rn); |
620 |
retval = ccs_check_exec_perm(r, &rn); |
if (retval == 1) |
621 |
if (retval == 1) |
goto retry; |
622 |
goto retry; |
if (retval < 0) |
623 |
if (retval < 0) |
goto out; |
624 |
goto out; |
} |
625 |
|
|
626 |
calculate_domain: |
/* Calculate domain to transit to. */ |
|
new_domain_name = ee->tmp; |
|
627 |
if (ccs_is_domain_initializer(r->domain->domainname, &rn, &ln)) { |
if (ccs_is_domain_initializer(r->domain->domainname, &rn, &ln)) { |
628 |
/* Transit to the child of ccs_kernel_domain domain. */ |
/* Transit to the child of ccs_kernel_domain domain. */ |
629 |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, ROOT_NAME " " "%s", |
630 |
ROOT_NAME " " "%s", ee->program_path); |
rn.name); |
631 |
} else if (r->domain == &ccs_kernel_domain && !ccs_policy_loaded) { |
} else if (r->domain == &ccs_kernel_domain && !ccs_policy_loaded) { |
632 |
/* |
/* |
633 |
* Needn't to transit from kernel domain before starting |
* Needn't to transit from kernel domain before starting |
640 |
domain = r->domain; |
domain = r->domain; |
641 |
} else { |
} else { |
642 |
/* Normal domain transition. */ |
/* Normal domain transition. */ |
643 |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s", |
644 |
"%s %s", old_domain_name, ee->program_path); |
old_domain_name, rn.name); |
645 |
} |
} |
646 |
if (domain || strlen(new_domain_name) >= CCS_MAX_PATHNAME_LEN) |
if (domain || strlen(ee->tmp) >= CCS_EXEC_TMPSIZE - 10) |
647 |
goto done; |
goto done; |
648 |
domain = ccs_find_domain(new_domain_name); |
domain = ccs_find_domain(ee->tmp); |
649 |
if (domain) |
if (domain) |
650 |
goto done; |
goto done; |
651 |
if (is_enforce) { |
if (r->mode == CCS_CONFIG_ENFORCING) { |
652 |
int error = ccs_check_supervisor(r, |
int error = ccs_supervisor(r, "# wants to create domain\n" |
653 |
"# wants to create domain\n" |
"%s\n", ee->tmp); |
|
"%s\n", new_domain_name); |
|
654 |
if (error == 1) |
if (error == 1) |
655 |
goto retry; |
goto retry; |
656 |
if (error < 0) |
if (error < 0) |
657 |
goto done; |
goto done; |
658 |
} |
} |
659 |
domain = ccs_find_or_assign_new_domain(new_domain_name, r->profile); |
domain = ccs_find_or_assign_new_domain(ee->tmp, r->profile); |
660 |
if (domain) |
if (domain) |
661 |
ccs_audit_domain_creation_log(domain); |
ccs_audit_domain_creation_log(r->domain); |
662 |
done: |
done: |
663 |
if (!domain) { |
if (!domain) { |
664 |
printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", |
printk(KERN_WARNING "ERROR: Domain '%s' not defined.\n", |
665 |
new_domain_name); |
ee->tmp); |
666 |
if (is_enforce) |
if (r->mode == CCS_CONFIG_ENFORCING) |
667 |
retval = -EPERM; |
retval = -EPERM; |
668 |
else { |
else { |
669 |
retval = 0; |
retval = 0; |
670 |
ccs_set_domain_flag(r->domain, false, |
r->domain->domain_transition_failed = true; |
|
DOMAIN_FLAGS_TRANSITION_FAILED); |
|
671 |
} |
} |
672 |
} else { |
} else { |
673 |
retval = 0; |
retval = 0; |
675 |
out: |
out: |
676 |
if (domain) |
if (domain) |
677 |
r->domain = domain; |
r->domain = domain; |
678 |
|
if (need_kfree) |
679 |
|
kfree(rn.name); |
680 |
return retval; |
return retval; |
681 |
} |
} |
682 |
|
|
683 |
/** |
/** |
684 |
* ccs_check_environ - Check permission for environment variable names. |
* ccs_environ - Check permission for environment variable names. |
685 |
* |
* |
686 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve_entry". |
687 |
* |
* |
688 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
689 |
*/ |
*/ |
690 |
static int ccs_check_environ(struct ccs_execve_entry *ee) |
static int ccs_environ(struct ccs_execve_entry *ee) |
691 |
{ |
{ |
692 |
struct ccs_request_info *r = &ee->r; |
struct ccs_request_info *r = &ee->r; |
693 |
struct linux_binprm *bprm = ee->bprm; |
struct linux_binprm *bprm = ee->bprm; |
718 |
while (offset < PAGE_SIZE) { |
while (offset < PAGE_SIZE) { |
719 |
const char *kaddr = ee->dump.data; |
const char *kaddr = ee->dump.data; |
720 |
const unsigned char c = kaddr[offset++]; |
const unsigned char c = kaddr[offset++]; |
721 |
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
if (c && arg_len < CCS_EXEC_TMPSIZE - 10) { |
722 |
if (c == '=') { |
if (c == '=') { |
723 |
arg_ptr[arg_len++] = '\0'; |
arg_ptr[arg_len++] = '\0'; |
724 |
} else if (c == '\\') { |
} else if (c == '\\') { |
738 |
} |
} |
739 |
if (c) |
if (c) |
740 |
continue; |
continue; |
741 |
if (ccs_check_env_perm(r, arg_ptr)) { |
if (ccs_env_perm(r, arg_ptr)) { |
742 |
error = -EPERM; |
error = -EPERM; |
743 |
break; |
break; |
744 |
} |
} |
806 |
static inline int ccs_root_depth(struct dentry *dentry, struct vfsmount *vfsmnt) |
static inline int ccs_root_depth(struct dentry *dentry, struct vfsmount *vfsmnt) |
807 |
{ |
{ |
808 |
int depth = 0; |
int depth = 0; |
|
/***** CRITICAL SECTION START *****/ |
|
809 |
ccs_realpath_lock(); |
ccs_realpath_lock(); |
810 |
for (;;) { |
for (;;) { |
811 |
if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) { |
if (dentry == vfsmnt->mnt_root || IS_ROOT(dentry)) { |
820 |
depth++; |
depth++; |
821 |
} |
} |
822 |
ccs_realpath_unlock(); |
ccs_realpath_unlock(); |
|
/***** CRITICAL SECTION END *****/ |
|
823 |
return depth; |
return depth; |
824 |
} |
} |
825 |
|
|
836 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
837 |
struct path root; |
struct path root; |
838 |
#endif |
#endif |
|
/***** CRITICAL SECTION START *****/ |
|
839 |
read_lock(¤t->fs->lock); |
read_lock(¤t->fs->lock); |
840 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
841 |
root = current->fs->root; |
root = current->fs->root; |
847 |
vfsmnt = mntget(current->fs->rootmnt); |
vfsmnt = mntget(current->fs->rootmnt); |
848 |
#endif |
#endif |
849 |
read_unlock(¤t->fs->lock); |
read_unlock(¤t->fs->lock); |
|
/***** CRITICAL SECTION END *****/ |
|
850 |
depth = ccs_root_depth(dentry, vfsmnt); |
depth = ccs_root_depth(dentry, vfsmnt); |
851 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25) |
852 |
path_put(&root); |
path_put(&root); |
857 |
return depth; |
return depth; |
858 |
} |
} |
859 |
|
|
|
static LIST_HEAD(ccs_execve_list); |
|
|
static DEFINE_SPINLOCK(ccs_execve_list_lock); |
|
|
|
|
|
/** |
|
|
* ccs_allocate_execve_entry - Allocate memory for execve(). |
|
|
* |
|
|
* Returns pointer to "struct ccs_execve_entry" on success, NULL otherwise. |
|
|
*/ |
|
|
static struct ccs_execve_entry *ccs_allocate_execve_entry(void) |
|
|
{ |
|
|
struct ccs_execve_entry *ee = ccs_alloc(sizeof(*ee), false); |
|
|
if (!ee) |
|
|
return NULL; |
|
|
memset(ee, 0, sizeof(*ee)); |
|
|
ee->program_path = ccs_alloc(CCS_MAX_PATHNAME_LEN, false); |
|
|
ee->tmp = ccs_alloc(CCS_MAX_PATHNAME_LEN, false); |
|
|
if (!ee->program_path || !ee->tmp) { |
|
|
ccs_free(ee->program_path); |
|
|
ccs_free(ee->tmp); |
|
|
ccs_free(ee); |
|
|
return NULL; |
|
|
} |
|
|
/* ee->dump->data is allocated by ccs_dump_page(). */ |
|
|
ee->task = current; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&ccs_execve_list_lock); |
|
|
list_add(&ee->list, &ccs_execve_list); |
|
|
spin_unlock(&ccs_execve_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
return ee; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_find_execve_entry - Find ccs_execve_entry of current process. |
|
|
* |
|
|
* Returns pointer to "struct ccs_execve_entry" on success, NULL otherwise. |
|
|
*/ |
|
|
static struct ccs_execve_entry *ccs_find_execve_entry(void) |
|
|
{ |
|
|
struct task_struct *task = current; |
|
|
struct ccs_execve_entry *ee = NULL; |
|
|
struct ccs_execve_entry *p; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&ccs_execve_list_lock); |
|
|
list_for_each_entry(p, &ccs_execve_list, list) { |
|
|
if (p->task != task) |
|
|
continue; |
|
|
ee = p; |
|
|
break; |
|
|
} |
|
|
spin_unlock(&ccs_execve_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
return ee; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_free_execve_entry - Free memory for execve(). |
|
|
* |
|
|
* @ee: Pointer to "struct ccs_execve_entry". |
|
|
*/ |
|
|
static void ccs_free_execve_entry(struct ccs_execve_entry *ee) |
|
|
{ |
|
|
if (!ee) |
|
|
return; |
|
|
/***** CRITICAL SECTION START *****/ |
|
|
spin_lock(&ccs_execve_list_lock); |
|
|
list_del(&ee->list); |
|
|
spin_unlock(&ccs_execve_list_lock); |
|
|
/***** CRITICAL SECTION END *****/ |
|
|
ccs_free(ee->program_path); |
|
|
ccs_free(ee->tmp); |
|
|
kfree(ee->dump.data); |
|
|
ccs_free(ee); |
|
|
} |
|
|
|
|
860 |
/** |
/** |
861 |
* ccs_try_alt_exec - Try to start execute handler. |
* ccs_try_alt_exec - Try to start execute handler. |
862 |
* |
* |
910 |
struct task_struct *task = current; |
struct task_struct *task = current; |
911 |
|
|
912 |
/* Close the requested program's dentry. */ |
/* Close the requested program's dentry. */ |
913 |
|
ee->obj.path1.dentry = NULL; |
914 |
|
ee->obj.path1.mnt = NULL; |
915 |
|
ee->obj.validate_done = false; |
916 |
allow_write_access(bprm->file); |
allow_write_access(bprm->file); |
917 |
fput(bprm->file); |
fput(bprm->file); |
918 |
bprm->file = NULL; |
bprm->file = NULL; |
976 |
char *exe = (char *) ccs_get_exe(); |
char *exe = (char *) ccs_get_exe(); |
977 |
if (exe) { |
if (exe) { |
978 |
retval = copy_strings_kernel(1, &exe, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
979 |
ccs_free(exe); |
kfree(exe); |
980 |
} else { |
} else { |
981 |
exe = ee->tmp; |
exe = ee->tmp; |
982 |
strncpy(ee->tmp, "<unknown>", CCS_EXEC_TMPSIZE - 1); |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<unknown>"); |
983 |
retval = copy_strings_kernel(1, &exe, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
984 |
} |
} |
985 |
if (retval < 0) |
if (retval < 0) |
990 |
/* Set argv[1] */ |
/* Set argv[1] */ |
991 |
{ |
{ |
992 |
char *cp = ee->tmp; |
char *cp = ee->tmp; |
993 |
strncpy(ee->tmp, ccs_current_domain()->domainname->name, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s", |
994 |
CCS_EXEC_TMPSIZE - 1); |
ccs_current_domain()->domainname->name); |
995 |
retval = copy_strings_kernel(1, &cp, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
996 |
if (retval < 0) |
if (retval < 0) |
997 |
goto out; |
goto out; |
1001 |
/* Set argv[0] */ |
/* Set argv[0] */ |
1002 |
{ |
{ |
1003 |
int depth = ccs_get_root_depth(); |
int depth = ccs_get_root_depth(); |
1004 |
char *cp = ee->program_path; |
int len = ee->handler->total_len + 1; |
1005 |
strncpy(cp, ee->handler->name, CCS_MAX_PATHNAME_LEN - 1); |
char *cp = kmalloc(len, GFP_KERNEL); |
1006 |
|
if (!cp) { |
1007 |
|
retval = -ENOMEM; |
1008 |
|
goto out; |
1009 |
|
} |
1010 |
|
ee->handler_path = cp; |
1011 |
|
memmove(cp, ee->handler->name, len); |
1012 |
ccs_unescape(cp); |
ccs_unescape(cp); |
1013 |
retval = -ENOENT; |
retval = -ENOENT; |
1014 |
if (!*cp || *cp != '/') |
if (!*cp || *cp != '/') |
1020 |
goto out; |
goto out; |
1021 |
depth--; |
depth--; |
1022 |
} |
} |
1023 |
memmove(ee->program_path, cp, strlen(cp) + 1); |
memmove(ee->handler_path, cp, strlen(cp) + 1); |
1024 |
cp = ee->program_path; |
cp = ee->handler_path; |
1025 |
retval = copy_strings_kernel(1, &cp, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
1026 |
if (retval < 0) |
if (retval < 0) |
1027 |
goto out; |
goto out; |
1034 |
#endif |
#endif |
1035 |
|
|
1036 |
/* OK, now restart the process with execute handler program's dentry. */ |
/* OK, now restart the process with execute handler program's dentry. */ |
1037 |
filp = open_exec(ee->program_path); |
filp = open_exec(ee->handler_path); |
1038 |
if (IS_ERR(filp)) { |
if (IS_ERR(filp)) { |
1039 |
retval = PTR_ERR(filp); |
retval = PTR_ERR(filp); |
1040 |
goto out; |
goto out; |
1041 |
} |
} |
1042 |
|
ee->obj.path1.dentry = filp->f_dentry; |
1043 |
|
ee->obj.path1.mnt = filp->f_vfsmnt; |
1044 |
bprm->file = filp; |
bprm->file = filp; |
1045 |
bprm->filename = ee->program_path; |
bprm->filename = ee->handler_path; |
1046 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
1047 |
bprm->interp = bprm->filename; |
bprm->interp = bprm->filename; |
1048 |
#endif |
#endif |
1049 |
retval = prepare_binprm(bprm); |
retval = prepare_binprm(bprm); |
1050 |
if (retval < 0) |
if (retval < 0) |
1051 |
goto out; |
goto out; |
1052 |
{ |
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1053 |
/* |
retval = ccs_find_next_domain(ee); |
1054 |
* Backup ee->program_path because ccs_find_next_domain() will |
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
* overwrite ee->program_path and ee->tmp. |
|
|
*/ |
|
|
const int len = strlen(ee->program_path) + 1; |
|
|
char *cp = kmalloc(len, GFP_KERNEL); |
|
|
if (!cp) { |
|
|
retval = -ENOMEM; |
|
|
goto out; |
|
|
} |
|
|
memmove(cp, ee->program_path, len); |
|
|
bprm->filename = cp; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
|
|
bprm->interp = bprm->filename; |
|
|
#endif |
|
|
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
retval = ccs_find_next_domain(ee); |
|
|
task->ccs_flags &= ~CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
|
|
/* Restore ee->program_path for search_binary_handler(). */ |
|
|
memmove(ee->program_path, cp, len); |
|
|
bprm->filename = ee->program_path; |
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
|
|
bprm->interp = bprm->filename; |
|
|
#endif |
|
|
kfree(cp); |
|
|
} |
|
1055 |
out: |
out: |
1056 |
return retval; |
return retval; |
1057 |
} |
} |
1063 |
* @type: Type of execute handler. |
* @type: Type of execute handler. |
1064 |
* |
* |
1065 |
* Returns true if found, false otherwise. |
* Returns true if found, false otherwise. |
1066 |
|
* |
1067 |
|
* Caller holds ccs_read_lock(). |
1068 |
*/ |
*/ |
1069 |
static bool ccs_find_execute_handler(struct ccs_execve_entry *ee, |
static bool ccs_find_execute_handler(struct ccs_execve_entry *ee, |
1070 |
const u8 type) |
const u8 type) |
1072 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1073 |
const struct ccs_domain_info *domain = ccs_current_domain(); |
const struct ccs_domain_info *domain = ccs_current_domain(); |
1074 |
struct ccs_acl_info *ptr; |
struct ccs_acl_info *ptr; |
1075 |
|
bool found = false; |
1076 |
/* |
/* |
1077 |
* Don't use execute handler if the current process is |
* Don't use execute handler if the current process is |
1078 |
* marked as execute handler to avoid infinite execute handler loop. |
* marked as execute handler to avoid infinite execute handler loop. |
1079 |
*/ |
*/ |
1080 |
if (task->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) |
if (task->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) |
1081 |
return false; |
return false; |
1082 |
list1_for_each_entry(ptr, &domain->acl_info_list, list) { |
list_for_each_entry(ptr, &domain->acl_info_list, list) { |
1083 |
struct ccs_execute_handler_record *acl; |
struct ccs_execute_handler_record *acl; |
1084 |
if (ptr->type != type) |
if (ptr->type != type) |
1085 |
continue; |
continue; |
1086 |
acl = container_of(ptr, struct ccs_execute_handler_record, |
acl = container_of(ptr, struct ccs_execute_handler_record, |
1087 |
head); |
head); |
1088 |
ee->handler = acl->handler; |
ee->handler = acl->handler; |
1089 |
return true; |
found = true; |
1090 |
|
break; |
1091 |
} |
} |
1092 |
return false; |
return found; |
1093 |
} |
} |
1094 |
|
|
1095 |
/** |
/** |
1105 |
struct ccs_page_dump *dump) |
struct ccs_page_dump *dump) |
1106 |
{ |
{ |
1107 |
struct page *page; |
struct page *page; |
1108 |
/* dump->data is released by ccs_free_execve_entry(). */ |
/* dump->data is released by ccs_finish_execve(). */ |
1109 |
if (!dump->data) { |
if (!dump->data) { |
1110 |
dump->data = kmalloc(PAGE_SIZE, GFP_KERNEL); |
dump->data = kzalloc(PAGE_SIZE, GFP_KERNEL); |
1111 |
if (!dump->data) |
if (!dump->data) |
1112 |
return false; |
return false; |
1113 |
} |
} |
1115 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1116 |
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1117 |
return false; |
return false; |
1118 |
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR == 3 && defined(CONFIG_MMU) |
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 3 && defined(CONFIG_MMU) |
1119 |
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1120 |
|
return false; |
1121 |
|
#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2 && defined(CONFIG_MMU) |
1122 |
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1123 |
return false; |
return false; |
1124 |
#else |
#else |
1139 |
/* Same with put_arg_page(page) in fs/exec.c */ |
/* Same with put_arg_page(page) in fs/exec.c */ |
1140 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1141 |
put_page(page); |
put_page(page); |
1142 |
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR == 3 && defined(CONFIG_MMU) |
#elif defined(RHEL_MAJOR) && RHEL_MAJOR == 5 && defined(RHEL_MINOR) && RHEL_MINOR >= 3 && defined(CONFIG_MMU) |
1143 |
|
put_page(page); |
1144 |
|
#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2 && defined(CONFIG_MMU) |
1145 |
put_page(page); |
put_page(page); |
1146 |
#endif |
#endif |
1147 |
return true; |
return true; |
1148 |
} |
} |
1149 |
|
|
1150 |
/** |
/** |
|
* ccs_fetch_next_domain - Fetch next_domain from the list. |
|
|
* |
|
|
* Returns pointer to "struct ccs_domain_info" which will be used if execve() |
|
|
* succeeds. This function does not return NULL. |
|
|
*/ |
|
|
struct ccs_domain_info *ccs_fetch_next_domain(void) |
|
|
{ |
|
|
struct ccs_execve_entry *ee = ccs_find_execve_entry(); |
|
|
struct ccs_domain_info *next_domain = NULL; |
|
|
if (ee) |
|
|
next_domain = ee->next_domain; |
|
|
if (!next_domain) |
|
|
next_domain = ccs_current_domain(); |
|
|
return next_domain; |
|
|
} |
|
|
|
|
|
/** |
|
1151 |
* ccs_start_execve - Prepare for execve() operation. |
* ccs_start_execve - Prepare for execve() operation. |
1152 |
* |
* |
1153 |
* @bprm: Pointer to "struct linux_binprm". |
* @bprm: Pointer to "struct linux_binprm". |
1154 |
|
* @eep: Pointer to "struct ccs_execve_entry *". |
1155 |
* |
* |
1156 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
1157 |
*/ |
*/ |
1158 |
int ccs_start_execve(struct linux_binprm *bprm) |
int ccs_start_execve(struct linux_binprm *bprm, struct ccs_execve_entry **eep) |
1159 |
{ |
{ |
1160 |
int retval; |
int retval; |
1161 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1162 |
struct ccs_execve_entry *ee = ccs_allocate_execve_entry(); |
struct ccs_execve_entry *ee; |
1163 |
|
*eep = NULL; |
1164 |
if (!ccs_policy_loaded) |
if (!ccs_policy_loaded) |
1165 |
ccs_load_policy(bprm->filename); |
ccs_load_policy(bprm->filename); |
1166 |
|
ee = kzalloc(sizeof(*ee), GFP_KERNEL); |
1167 |
if (!ee) |
if (!ee) |
1168 |
return -ENOMEM; |
return -ENOMEM; |
1169 |
ccs_init_request_info(&ee->r, NULL, CCS_MAC_FOR_FILE); |
ee->tmp = kzalloc(CCS_EXEC_TMPSIZE, GFP_KERNEL); |
1170 |
|
if (!ee->tmp) { |
1171 |
|
kfree(ee); |
1172 |
|
return -ENOMEM; |
1173 |
|
} |
1174 |
|
ee->reader_idx = ccs_read_lock(); |
1175 |
|
/* ee->dump->data is allocated by ccs_dump_page(). */ |
1176 |
|
ee->previous_domain = task->ccs_domain_info; |
1177 |
|
/* Clear manager flag. */ |
1178 |
|
task->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
1179 |
|
/* Tell GC that I started execve(). */ |
1180 |
|
task->ccs_flags |= CCS_TASK_IS_IN_EXECVE; |
1181 |
|
/* |
1182 |
|
* Make task->ccs_flags visible to GC before changing |
1183 |
|
* task->ccs_domain_info . |
1184 |
|
*/ |
1185 |
|
smp_mb(); |
1186 |
|
*eep = ee; |
1187 |
|
ccs_init_request_info(&ee->r, NULL, CCS_MAC_FILE_EXECUTE); |
1188 |
ee->r.ee = ee; |
ee->r.ee = ee; |
1189 |
ee->bprm = bprm; |
ee->bprm = bprm; |
1190 |
ee->r.obj = &ee->obj; |
ee->r.obj = &ee->obj; |
1191 |
ee->obj.path1_dentry = bprm->file->f_dentry; |
ee->obj.path1.dentry = bprm->file->f_dentry; |
1192 |
ee->obj.path1_vfsmnt = bprm->file->f_vfsmnt; |
ee->obj.path1.mnt = bprm->file->f_vfsmnt; |
1193 |
/* Clear manager flag. */ |
if (ccs_find_execute_handler(ee, CCS_TYPE_EXECUTE_HANDLER)) { |
|
task->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
|
|
if (ccs_find_execute_handler(ee, TYPE_EXECUTE_HANDLER)) { |
|
1194 |
retval = ccs_try_alt_exec(ee); |
retval = ccs_try_alt_exec(ee); |
1195 |
if (!retval) |
if (!retval) |
1196 |
ccs_audit_execute_handler_log(ee, true); |
ccs_audit_execute_handler_log(ee, true); |
1199 |
retval = ccs_find_next_domain(ee); |
retval = ccs_find_next_domain(ee); |
1200 |
if (retval != -EPERM) |
if (retval != -EPERM) |
1201 |
goto ok; |
goto ok; |
1202 |
if (ccs_find_execute_handler(ee, TYPE_DENIED_EXECUTE_HANDLER)) { |
if (ccs_find_execute_handler(ee, CCS_TYPE_DENIED_EXECUTE_HANDLER)) { |
1203 |
retval = ccs_try_alt_exec(ee); |
retval = ccs_try_alt_exec(ee); |
1204 |
if (!retval) |
if (!retval) |
1205 |
ccs_audit_execute_handler_log(ee, false); |
ccs_audit_execute_handler_log(ee, false); |
1207 |
ok: |
ok: |
1208 |
if (retval < 0) |
if (retval < 0) |
1209 |
goto out; |
goto out; |
1210 |
ee->r.mode = ccs_check_flags(ee->r.domain, CCS_MAC_FOR_ENV); |
/* |
1211 |
retval = ccs_check_environ(ee); |
* Proceed to the next domain in order to allow reaching via PID. |
1212 |
|
* It will be reverted if execve() failed. Reverting is not good. |
1213 |
|
* But it is better than being unable to reach via PID in interactive |
1214 |
|
* enforcing mode. |
1215 |
|
*/ |
1216 |
|
task->ccs_domain_info = ee->r.domain; |
1217 |
|
ee->r.mode = ccs_get_mode(ee->r.domain->profile, CCS_MAC_ENVIRON); |
1218 |
|
retval = ccs_environ(ee); |
1219 |
if (retval < 0) |
if (retval < 0) |
1220 |
goto out; |
goto out; |
|
ee->next_domain = ee->r.domain; |
|
|
task->ccs_flags |= CCS_CHECK_READ_FOR_OPEN_EXEC; |
|
1221 |
retval = 0; |
retval = 0; |
1222 |
out: |
out: |
|
if (retval) |
|
|
ccs_finish_execve(retval); |
|
1223 |
return retval; |
return retval; |
1224 |
} |
} |
1225 |
|
|
1227 |
* ccs_finish_execve - Clean up execve() operation. |
* ccs_finish_execve - Clean up execve() operation. |
1228 |
* |
* |
1229 |
* @retval: Return code of an execve() operation. |
* @retval: Return code of an execve() operation. |
1230 |
|
* @ee: Pointer to "struct ccs_execve_entry". |
1231 |
|
* |
1232 |
|
* Caller holds ccs_read_lock(). |
1233 |
*/ |
*/ |
1234 |
void ccs_finish_execve(int retval) |
void ccs_finish_execve(int retval, struct ccs_execve_entry *ee) |
1235 |
{ |
{ |
1236 |
struct task_struct *task = current; |
struct task_struct *task = current; |
|
struct ccs_execve_entry *ee = ccs_find_execve_entry(); |
|
|
task->ccs_flags &= ~CCS_CHECK_READ_FOR_OPEN_EXEC; |
|
1237 |
if (!ee) |
if (!ee) |
1238 |
return; |
return; |
1239 |
if (retval < 0) |
if (retval < 0) { |
1240 |
goto out; |
task->ccs_domain_info = ee->previous_domain; |
1241 |
/* Proceed to next domain if execution suceeded. */ |
/* |
1242 |
task->ccs_domain_info = ee->r.domain; |
* Make task->ccs_domain_info visible to GC before changing |
1243 |
mb(); /* Make domain transition visible to other CPUs. */ |
* task->ccs_flags . |
1244 |
/* Mark the current process as execute handler. */ |
*/ |
1245 |
if (ee->handler) |
smp_mb(); |
1246 |
task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER; |
} else { |
1247 |
/* Mark the current process as normal process. */ |
/* Mark the current process as execute handler. */ |
1248 |
else |
if (ee->handler) |
1249 |
task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER; |
task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER; |
1250 |
out: |
/* Mark the current process as normal process. */ |
1251 |
ccs_free_execve_entry(ee); |
else |
1252 |
} |
task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER; |
1253 |
|
} |
1254 |
#else |
/* Tell GC that I finished execve(). */ |
1255 |
|
task->ccs_flags &= ~CCS_TASK_IS_IN_EXECVE; |
1256 |
/** |
ccs_read_unlock(ee->reader_idx); |
1257 |
* ccs_start_execve - Prepare for execve() operation. |
kfree(ee->handler_path); |
1258 |
* |
kfree(ee->tmp); |
1259 |
* @bprm: Pointer to "struct linux_binprm". |
kfree(ee->dump.data); |
1260 |
* |
kfree(ee); |
|
* Returns 0. |
|
|
*/ |
|
|
int ccs_start_execve(struct linux_binprm *bprm) |
|
|
{ |
|
|
#ifdef CONFIG_SAKURA |
|
|
/* Clear manager flag. */ |
|
|
current->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
|
|
if (!ccs_policy_loaded) |
|
|
ccs_load_policy(bprm->filename); |
|
|
#endif |
|
|
return 0; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_finish_execve - Clean up execve() operation. |
|
|
*/ |
|
|
void ccs_finish_execve(int retval) |
|
|
{ |
|
1261 |
} |
} |
|
|
|
|
#endif |
|