1 |
/* |
/* |
2 |
* fs/tomoyo_domain.c |
* security/ccsecurity/domain.c |
3 |
* |
* |
4 |
* Implementation of the Domain-Based Mandatory Access Control. |
* Copyright (C) 2005-2010 NTT DATA CORPORATION |
5 |
* |
* |
6 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
* Version: 1.7.2+ 2010/05/05 |
|
* |
|
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* Version: 1.6.8 2009/05/28 |
|
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 |
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|
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> |
20 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 30) |
21 |
#include <linux/fs_struct.h> |
#include <linux/fs_struct.h> |
22 |
#endif |
#endif |
23 |
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#include "internal.h" |
|
/* For compatibility with older kernels. */ |
|
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#ifndef for_each_process |
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#define for_each_process for_each_task |
|
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#endif |
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24 |
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25 |
/* Variables definitions.*/ |
/* Variables definitions.*/ |
26 |
|
|
30 |
/* The list for "struct ccs_domain_info". */ |
/* The list for "struct ccs_domain_info". */ |
31 |
LIST_HEAD(ccs_domain_list); |
LIST_HEAD(ccs_domain_list); |
32 |
|
|
33 |
#ifdef CONFIG_TOMOYO |
struct list_head ccs_policy_list[CCS_MAX_POLICY]; |
34 |
|
struct list_head ccs_group_list[CCS_MAX_GROUP]; |
35 |
|
struct list_head ccs_shared_list[CCS_MAX_LIST]; |
36 |
|
|
37 |
/** |
/** |
38 |
* ccs_get_last_name - Get last component of a domainname. |
* ccs_audit_execute_handler_log - Audit execute_handler log. |
39 |
* |
* |
40 |
* @domain: Pointer to "struct ccs_domain_info". |
* @ee: Pointer to "struct ccs_execve". |
41 |
* |
* |
42 |
* Returns the last component of the domainname. |
* Returns 0 on success, negative value otherwise. |
43 |
*/ |
*/ |
44 |
const char *ccs_get_last_name(const struct ccs_domain_info *domain) |
static int ccs_audit_execute_handler_log(struct ccs_execve *ee) |
45 |
{ |
{ |
46 |
const char *cp0 = domain->domainname->name; |
struct ccs_request_info *r = &ee->r; |
47 |
const char *cp1 = strrchr(cp0, ' '); |
const char *handler = ee->handler->name; |
48 |
if (cp1) |
r->type = CCS_MAC_FILE_EXECUTE; |
49 |
return cp1 + 1; |
r->mode = ccs_get_mode(r->profile, CCS_MAC_FILE_EXECUTE); |
50 |
return cp0; |
return ccs_write_log(true, r, "%s %s\n", ee->handler_type == |
51 |
|
CCS_TYPE_DENIED_EXECUTE_HANDLER ? |
52 |
|
CCS_KEYWORD_DENIED_EXECUTE_HANDLER : |
53 |
|
CCS_KEYWORD_EXECUTE_HANDLER, handler); |
54 |
} |
} |
55 |
|
|
56 |
/** |
/** |
57 |
* ccs_add_domain_acl - Add the given ACL to the given domain. |
* ccs_audit_domain_creation_log - Audit domain creation log. |
|
* |
|
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* @domain: Pointer to "struct ccs_domain_info". May be NULL. |
|
|
* @acl: Pointer to "struct ccs_acl_info". |
|
58 |
* |
* |
59 |
* Returns 0. |
* Returns 0 on success, negative value otherwise. |
60 |
*/ |
*/ |
61 |
int ccs_add_domain_acl(struct ccs_domain_info *domain, struct ccs_acl_info *acl) |
static int ccs_audit_domain_creation_log(void) |
62 |
{ |
{ |
63 |
if (domain) { |
struct ccs_request_info r; |
64 |
if (acl->cond) |
ccs_init_request_info(&r, CCS_MAC_FILE_EXECUTE); |
65 |
atomic_inc(&acl->cond->users); |
return ccs_write_log(false, &r, "use_profile %u\n", r.profile); |
|
list_add_tail_rcu(&acl->list, &domain->acl_info_list); |
|
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} else { |
|
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acl->type &= ~ACL_DELETED; |
|
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} |
|
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ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
|
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return 0; |
|
66 |
} |
} |
67 |
|
|
68 |
/** |
int ccs_update_policy(struct ccs_acl_head *new_entry, const int size, |
69 |
* ccs_del_domain_acl - Delete the given ACL from the domain. |
bool is_delete, const int idx, bool (*check_duplicate) |
70 |
* |
(const struct ccs_acl_head *, |
71 |
* @acl: Pointer to "struct ccs_acl_info". May be NULL. |
const struct ccs_acl_head *)) |
|
* |
|
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* Returns 0. |
|
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*/ |
|
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int ccs_del_domain_acl(struct ccs_acl_info *acl) |
|
72 |
{ |
{ |
73 |
if (acl) |
int error = is_delete ? -ENOENT : -ENOMEM; |
74 |
acl->type |= ACL_DELETED; |
struct ccs_acl_head *entry; |
75 |
ccs_update_counter(CCS_UPDATES_COUNTER_DOMAIN_POLICY); |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
76 |
return 0; |
return -ENOMEM; |
77 |
|
list_for_each_entry_rcu(entry, &ccs_policy_list[idx], list) { |
78 |
|
if (!check_duplicate(entry, new_entry)) |
79 |
|
continue; |
80 |
|
entry->is_deleted = is_delete; |
81 |
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error = 0; |
82 |
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break; |
83 |
|
} |
84 |
|
if (error && !is_delete) { |
85 |
|
entry = ccs_commit_ok(new_entry, size); |
86 |
|
if (entry) { |
87 |
|
list_add_tail_rcu(&entry->list, &ccs_policy_list[idx]); |
88 |
|
error = 0; |
89 |
|
} |
90 |
|
} |
91 |
|
mutex_unlock(&ccs_policy_lock); |
92 |
|
return error; |
93 |
} |
} |
94 |
|
|
95 |
/** |
int ccs_update_group(struct ccs_acl_head *new_entry, const int size, |
96 |
* ccs_audit_execute_handler_log - Audit execute_handler log. |
bool is_delete, struct ccs_group *group, |
97 |
* |
bool (*check_duplicate) (const struct ccs_acl_head *, |
98 |
* @ee: Pointer to "struct ccs_execve_entry". |
const struct ccs_acl_head *)) |
|
* @is_default: True if it is "execute_handler" log. |
|
|
* |
|
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* Returns 0 on success, negative value otherwise. |
|
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*/ |
|
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static int ccs_audit_execute_handler_log(struct ccs_execve_entry *ee, |
|
|
const bool is_default) |
|
99 |
{ |
{ |
100 |
struct ccs_request_info *r = &ee->r; |
int error = is_delete ? -ENOENT : -ENOMEM; |
101 |
const char *handler = ee->handler->name; |
struct ccs_acl_head *entry; |
102 |
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_FILE); |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
103 |
return ccs_write_audit_log(true, r, "%s %s\n", |
return -ENOMEM; |
104 |
is_default ? KEYWORD_EXECUTE_HANDLER : |
list_for_each_entry_rcu(entry, &group->member_list, list) { |
105 |
KEYWORD_DENIED_EXECUTE_HANDLER, handler); |
if (!check_duplicate(entry, new_entry)) |
106 |
|
continue; |
107 |
|
entry->is_deleted = is_delete; |
108 |
|
error = 0; |
109 |
|
break; |
110 |
|
} |
111 |
|
if (!is_delete && error) { |
112 |
|
entry = ccs_commit_ok(new_entry, size); |
113 |
|
if (entry) { |
114 |
|
list_add_tail_rcu(&entry->list, &group->member_list); |
115 |
|
error = 0; |
116 |
|
} |
117 |
|
} |
118 |
|
mutex_unlock(&ccs_policy_lock); |
119 |
|
return error; |
120 |
} |
} |
121 |
|
|
122 |
/** |
int ccs_update_domain(struct ccs_acl_info *new_entry, const int size, |
123 |
* ccs_audit_domain_creation_log - Audit domain creation log. |
bool is_delete, struct ccs_domain_info *domain, |
124 |
* |
bool (*check_duplicate) (const struct ccs_acl_info *, |
125 |
* @domain: Pointer to "struct ccs_domain_info". |
const struct ccs_acl_info *), |
126 |
* |
bool (*merge_duplicate) (struct ccs_acl_info *, |
127 |
* Returns 0 on success, negative value otherwise. |
struct ccs_acl_info *, |
128 |
*/ |
const bool)) |
|
static int ccs_audit_domain_creation_log(struct ccs_domain_info *domain) |
|
129 |
{ |
{ |
130 |
int error; |
int error = is_delete ? -ENOENT : -ENOMEM; |
131 |
struct ccs_request_info r; |
struct ccs_acl_info *entry; |
132 |
ccs_init_request_info(&r, domain, CCS_MAC_FOR_FILE); |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
133 |
error = ccs_write_audit_log(false, &r, "use_profile %u\n", r.profile); |
return error; |
134 |
|
list_for_each_entry_rcu(entry, &domain->acl_info_list, list) { |
135 |
|
if (!check_duplicate(entry, new_entry)) |
136 |
|
continue; |
137 |
|
if (merge_duplicate) |
138 |
|
entry->is_deleted = merge_duplicate(entry, new_entry, |
139 |
|
is_delete); |
140 |
|
else |
141 |
|
entry->is_deleted = is_delete; |
142 |
|
error = 0; |
143 |
|
break; |
144 |
|
} |
145 |
|
if (error && !is_delete) { |
146 |
|
entry = ccs_commit_ok(new_entry, size); |
147 |
|
if (entry) { |
148 |
|
ccs_add_domain_acl(domain, entry); |
149 |
|
error = 0; |
150 |
|
} |
151 |
|
} |
152 |
|
mutex_unlock(&ccs_policy_lock); |
153 |
return error; |
return error; |
154 |
} |
} |
155 |
|
|
156 |
/* The list for "struct ccs_domain_initializer_entry". */ |
static bool ccs_same_domain_initializer_entry(const struct ccs_acl_head *a, |
157 |
LIST_HEAD(ccs_domain_initializer_list); |
const struct ccs_acl_head *b) |
158 |
|
{ |
159 |
|
const struct ccs_domain_initializer *p1 = |
160 |
|
container_of(a, typeof(*p1), head); |
161 |
|
const struct ccs_domain_initializer *p2 = |
162 |
|
container_of(b, typeof(*p2), head); |
163 |
|
return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name |
164 |
|
&& p1->domainname == p2->domainname |
165 |
|
&& p1->program == p2->program; |
166 |
|
} |
167 |
|
|
168 |
/** |
/** |
169 |
* ccs_update_domain_initializer_entry - Update "struct ccs_domain_initializer_entry" list. |
* ccs_update_domain_initializer_entry - Update "struct ccs_domain_initializer" list. |
170 |
* |
* |
171 |
* @domainname: The name of domain. May be NULL. |
* @domainname: The name of domain. May be NULL. |
172 |
* @program: The name of program. |
* @program: The name of program. |
180 |
const bool is_not, |
const bool is_not, |
181 |
const bool is_delete) |
const bool is_delete) |
182 |
{ |
{ |
183 |
struct ccs_domain_initializer_entry *entry = NULL; |
struct ccs_domain_initializer e = { .is_not = is_not }; |
|
struct ccs_domain_initializer_entry *ptr; |
|
|
const struct ccs_path_info *saved_program; |
|
|
const struct ccs_path_info *saved_domainname = NULL; |
|
184 |
int error = is_delete ? -ENOENT : -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
185 |
bool is_last_name = false; |
if (!ccs_correct_path(program, 1, -1, -1)) |
|
if (!ccs_is_correct_path(program, 1, -1, -1)) |
|
186 |
return -EINVAL; /* No patterns allowed. */ |
return -EINVAL; /* No patterns allowed. */ |
187 |
if (domainname) { |
if (domainname) { |
188 |
if (!ccs_is_domain_def(domainname) && |
if (!ccs_domain_def(domainname) && |
189 |
ccs_is_correct_path(domainname, 1, -1, -1)) |
ccs_correct_path(domainname, 1, -1, -1)) |
190 |
is_last_name = true; |
e.is_last_name = true; |
191 |
else if (!ccs_is_correct_domain(domainname)) |
else if (!ccs_correct_domain(domainname)) |
192 |
return -EINVAL; |
return -EINVAL; |
193 |
saved_domainname = ccs_get_name(domainname); |
e.domainname = ccs_get_name(domainname); |
194 |
if (!saved_domainname) |
if (!e.domainname) |
195 |
return -ENOMEM; |
goto out; |
|
} |
|
|
saved_program = ccs_get_name(program); |
|
|
if (!saved_program) { |
|
|
ccs_put_name(saved_domainname); |
|
|
return -ENOMEM; |
|
|
} |
|
|
if (!is_delete) |
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
|
|
mutex_lock(&ccs_policy_lock); |
|
|
list_for_each_entry_rcu(ptr, &ccs_domain_initializer_list, list) { |
|
|
if (ptr->is_not != is_not || |
|
|
ptr->domainname != saved_domainname || |
|
|
ptr->program != saved_program) |
|
|
continue; |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
|
if (!is_delete && error && ccs_memory_ok(entry)) { |
|
|
entry->domainname = saved_domainname; |
|
|
saved_domainname = NULL; |
|
|
entry->program = saved_program; |
|
|
saved_program = NULL; |
|
|
entry->is_not = is_not; |
|
|
entry->is_last_name = is_last_name; |
|
|
list_add_tail_rcu(&entry->list, &ccs_domain_initializer_list); |
|
|
entry = NULL; |
|
|
error = 0; |
|
196 |
} |
} |
197 |
mutex_unlock(&ccs_policy_lock); |
e.program = ccs_get_name(program); |
198 |
ccs_put_name(saved_domainname); |
if (!e.program) |
199 |
ccs_put_name(saved_program); |
goto out; |
200 |
kfree(entry); |
error = ccs_update_policy(&e.head, sizeof(e), is_delete, |
201 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
CCS_ID_DOMAIN_INITIALIZER, |
202 |
|
ccs_same_domain_initializer_entry); |
203 |
|
out: |
204 |
|
ccs_put_name(e.domainname); |
205 |
|
ccs_put_name(e.program); |
206 |
return error; |
return error; |
207 |
} |
} |
208 |
|
|
209 |
/** |
/** |
210 |
* ccs_read_domain_initializer_policy - Read "struct ccs_domain_initializer_entry" list. |
* ccs_write_domain_initializer - Write "struct ccs_domain_initializer" list. |
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
* |
|
|
* Caller holds srcu_read_lock(&ccs_ss). |
|
|
*/ |
|
|
bool ccs_read_domain_initializer_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list_head *pos; |
|
|
bool done = true; |
|
|
list_for_each_cookie(pos, head->read_var2, |
|
|
&ccs_domain_initializer_list) { |
|
|
const char *no; |
|
|
const char *from = ""; |
|
|
const char *domain = ""; |
|
|
struct ccs_domain_initializer_entry *ptr; |
|
|
ptr = list_entry(pos, struct ccs_domain_initializer_entry, |
|
|
list); |
|
|
if (ptr->is_deleted) |
|
|
continue; |
|
|
no = ptr->is_not ? "no_" : ""; |
|
|
if (ptr->domainname) { |
|
|
from = " from "; |
|
|
domain = ptr->domainname->name; |
|
|
} |
|
|
done = ccs_io_printf(head, |
|
|
"%s" KEYWORD_INITIALIZE_DOMAIN "%s%s%s\n", |
|
|
no, ptr->program->name, from, domain); |
|
|
if (!done) |
|
|
break; |
|
|
} |
|
|
return done; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_write_domain_initializer_policy - Write "struct ccs_domain_initializer_entry" list. |
|
211 |
* |
* |
212 |
* @data: String to parse. |
* @data: String to parse. |
|
* @is_not: True if it is "no_initialize_domain" entry. |
|
213 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
214 |
* |
* |
215 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
216 |
*/ |
*/ |
217 |
int ccs_write_domain_initializer_policy(char *data, const bool is_not, |
int ccs_write_domain_initializer(char *data, const bool is_delete, const u8 flags) |
|
const bool is_delete) |
|
218 |
{ |
{ |
219 |
char *cp = strstr(data, " from "); |
char *domainname = strstr(data, " from "); |
220 |
if (cp) { |
if (domainname) { |
221 |
*cp = '\0'; |
*domainname = '\0'; |
222 |
return ccs_update_domain_initializer_entry(cp + 6, data, |
domainname += 6; |
|
is_not, is_delete); |
|
223 |
} |
} |
224 |
return ccs_update_domain_initializer_entry(NULL, data, is_not, |
return ccs_update_domain_initializer_entry(domainname, data, flags, |
225 |
is_delete); |
is_delete); |
226 |
} |
} |
227 |
|
|
228 |
/** |
/** |
229 |
* ccs_is_domain_initializer - Check whether the given program causes domainname reinitialization. |
* ccs_domain_initializer - Check whether the given program causes domainname reinitialization. |
230 |
* |
* |
231 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
232 |
* @program: The name of program. |
* @program: The name of program. |
235 |
* Returns true if executing @program reinitializes domain transition, |
* Returns true if executing @program reinitializes domain transition, |
236 |
* false otherwise. |
* false otherwise. |
237 |
* |
* |
238 |
* Caller holds srcu_read_lock(&ccs_ss). |
* Caller holds ccs_read_lock(). |
239 |
*/ |
*/ |
240 |
static bool ccs_is_domain_initializer(const struct ccs_path_info *domainname, |
static bool ccs_domain_initializer(const struct ccs_path_info *domainname, |
241 |
const struct ccs_path_info *program, |
const struct ccs_path_info *program, |
242 |
const struct ccs_path_info *last_name) |
const struct ccs_path_info *last_name) |
243 |
{ |
{ |
244 |
struct ccs_domain_initializer_entry *ptr; |
struct ccs_domain_initializer *ptr; |
245 |
bool flag = false; |
bool flag = false; |
246 |
list_for_each_entry_rcu(ptr, &ccs_domain_initializer_list, list) { |
list_for_each_entry_rcu(ptr, &ccs_policy_list |
247 |
if (ptr->is_deleted) |
[CCS_ID_DOMAIN_INITIALIZER], head.list) { |
248 |
|
if (ptr->head.is_deleted) |
249 |
continue; |
continue; |
250 |
if (ptr->domainname) { |
if (ptr->domainname) { |
251 |
if (!ptr->is_last_name) { |
if (!ptr->is_last_name) { |
267 |
return flag; |
return flag; |
268 |
} |
} |
269 |
|
|
270 |
/* The list for "struct ccs_domain_keeper_entry". */ |
static bool ccs_same_domain_keeper_entry(const struct ccs_acl_head *a, |
271 |
LIST_HEAD(ccs_domain_keeper_list); |
const struct ccs_acl_head *b) |
272 |
|
{ |
273 |
|
const struct ccs_domain_keeper *p1 = |
274 |
|
container_of(a, typeof(*p1), head); |
275 |
|
const struct ccs_domain_keeper *p2 = |
276 |
|
container_of(b, typeof(*p2), head); |
277 |
|
return p1->is_not == p2->is_not && p1->is_last_name == p2->is_last_name |
278 |
|
&& p1->domainname == p2->domainname |
279 |
|
&& p1->program == p2->program; |
280 |
|
} |
281 |
|
|
282 |
/** |
/** |
283 |
* ccs_update_domain_keeper_entry - Update "struct ccs_domain_keeper_entry" list. |
* ccs_update_domain_keeper_entry - Update "struct ccs_domain_keeper" list. |
284 |
* |
* |
285 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
286 |
* @program: The name of program. May be NULL. |
* @program: The name of program. May be NULL. |
294 |
const bool is_not, |
const bool is_not, |
295 |
const bool is_delete) |
const bool is_delete) |
296 |
{ |
{ |
297 |
struct ccs_domain_keeper_entry *entry = NULL; |
struct ccs_domain_keeper e = { .is_not = is_not }; |
|
struct ccs_domain_keeper_entry *ptr; |
|
|
const struct ccs_path_info *saved_domainname; |
|
|
const struct ccs_path_info *saved_program = NULL; |
|
298 |
int error = is_delete ? -ENOENT : -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
299 |
bool is_last_name = false; |
if (!ccs_domain_def(domainname) && |
300 |
if (!ccs_is_domain_def(domainname) && |
ccs_correct_path(domainname, 1, -1, -1)) |
301 |
ccs_is_correct_path(domainname, 1, -1, -1)) |
e.is_last_name = true; |
302 |
is_last_name = true; |
else if (!ccs_correct_domain(domainname)) |
|
else if (!ccs_is_correct_domain(domainname)) |
|
303 |
return -EINVAL; |
return -EINVAL; |
304 |
if (program) { |
if (program) { |
305 |
if (!ccs_is_correct_path(program, 1, -1, -1)) |
if (!ccs_correct_path(program, 1, -1, -1)) |
306 |
return -EINVAL; |
return -EINVAL; |
307 |
saved_program = ccs_get_name(program); |
e.program = ccs_get_name(program); |
308 |
if (!saved_program) |
if (!e.program) |
309 |
return -ENOMEM; |
goto out; |
|
} |
|
|
saved_domainname = ccs_get_name(domainname); |
|
|
if (!saved_domainname) { |
|
|
ccs_put_name(saved_program); |
|
|
return -ENOMEM; |
|
|
} |
|
|
if (!is_delete) |
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
|
|
mutex_lock(&ccs_policy_lock); |
|
|
list_for_each_entry_rcu(ptr, &ccs_domain_keeper_list, list) { |
|
|
if (ptr->is_not != is_not || |
|
|
ptr->domainname != saved_domainname || |
|
|
ptr->program != saved_program) |
|
|
continue; |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
|
if (!is_delete && error && ccs_memory_ok(entry)) { |
|
|
entry->domainname = saved_domainname; |
|
|
saved_domainname = NULL; |
|
|
entry->program = saved_program; |
|
|
saved_program = NULL; |
|
|
entry->is_not = is_not; |
|
|
entry->is_last_name = is_last_name; |
|
|
list_add_tail_rcu(&entry->list, &ccs_domain_keeper_list); |
|
|
entry = NULL; |
|
|
error = 0; |
|
310 |
} |
} |
311 |
mutex_unlock(&ccs_policy_lock); |
e.domainname = ccs_get_name(domainname); |
312 |
ccs_put_name(saved_domainname); |
if (!e.domainname) |
313 |
ccs_put_name(saved_program); |
goto out; |
314 |
kfree(entry); |
error = ccs_update_policy(&e.head, sizeof(e), is_delete, |
315 |
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
CCS_ID_DOMAIN_KEEPER, |
316 |
|
ccs_same_domain_keeper_entry); |
317 |
|
out: |
318 |
|
ccs_put_name(e.domainname); |
319 |
|
ccs_put_name(e.program); |
320 |
return error; |
return error; |
321 |
} |
} |
322 |
|
|
323 |
/** |
/** |
324 |
* ccs_write_domain_keeper_policy - Write "struct ccs_domain_keeper_entry" list. |
* ccs_write_domain_keeper - Write "struct ccs_domain_keeper" list. |
325 |
* |
* |
326 |
* @data: String to parse. |
* @data: String to parse. |
|
* @is_not: True if it is "no_keep_domain" entry. |
|
327 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
328 |
* |
* |
329 |
|
* Returns 0 on success, negative value otherwise. |
330 |
*/ |
*/ |
331 |
int ccs_write_domain_keeper_policy(char *data, const bool is_not, |
int ccs_write_domain_keeper(char *data, const bool is_delete, const u8 flags) |
|
const bool is_delete) |
|
|
{ |
|
|
char *cp = strstr(data, " from "); |
|
|
if (cp) { |
|
|
*cp = '\0'; |
|
|
return ccs_update_domain_keeper_entry(cp + 6, data, |
|
|
is_not, is_delete); |
|
|
} |
|
|
return ccs_update_domain_keeper_entry(data, NULL, is_not, is_delete); |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_read_domain_keeper_policy - Read "struct ccs_domain_keeper_entry" list. |
|
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
* |
|
|
* Caller holds srcu_read_lock(&ccs_ss). |
|
|
*/ |
|
|
bool ccs_read_domain_keeper_policy(struct ccs_io_buffer *head) |
|
332 |
{ |
{ |
333 |
struct list_head *pos; |
char *domainname = strstr(data, " from "); |
334 |
bool done = true; |
if (domainname) { |
335 |
list_for_each_cookie(pos, head->read_var2, |
*domainname = '\0'; |
336 |
&ccs_domain_keeper_list) { |
domainname += 6; |
337 |
struct ccs_domain_keeper_entry *ptr; |
} else { |
338 |
const char *no; |
domainname = data; |
339 |
const char *from = ""; |
data = NULL; |
|
const char *program = ""; |
|
|
ptr = list_entry(pos, struct ccs_domain_keeper_entry, list); |
|
|
if (ptr->is_deleted) |
|
|
continue; |
|
|
no = ptr->is_not ? "no_" : ""; |
|
|
if (ptr->program) { |
|
|
from = " from "; |
|
|
program = ptr->program->name; |
|
|
} |
|
|
done = ccs_io_printf(head, |
|
|
"%s" KEYWORD_KEEP_DOMAIN "%s%s%s\n", no, |
|
|
program, from, ptr->domainname->name); |
|
|
if (!done) |
|
|
break; |
|
340 |
} |
} |
341 |
return done; |
return ccs_update_domain_keeper_entry(domainname, data, flags, |
342 |
|
is_delete); |
343 |
} |
} |
344 |
|
|
345 |
/** |
/** |
346 |
* ccs_is_domain_keeper - Check whether the given program causes domain transition suppression. |
* ccs_domain_keeper - Check whether the given program causes domain transition suppression. |
347 |
* |
* |
348 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
349 |
* @program: The name of program. |
* @program: The name of program. |
352 |
* Returns true if executing @program supresses domain transition, |
* Returns true if executing @program supresses domain transition, |
353 |
* false otherwise. |
* false otherwise. |
354 |
* |
* |
355 |
* Caller holds srcu_read_lock(&ccs_ss). |
* Caller holds ccs_read_lock(). |
356 |
*/ |
*/ |
357 |
static bool ccs_is_domain_keeper(const struct ccs_path_info *domainname, |
static bool ccs_domain_keeper(const struct ccs_path_info *domainname, |
358 |
const struct ccs_path_info *program, |
const struct ccs_path_info *program, |
359 |
const struct ccs_path_info *last_name) |
const struct ccs_path_info *last_name) |
360 |
{ |
{ |
361 |
struct ccs_domain_keeper_entry *ptr; |
struct ccs_domain_keeper *ptr; |
362 |
bool flag = false; |
bool flag = false; |
363 |
list_for_each_entry_rcu(ptr, &ccs_domain_keeper_list, list) { |
list_for_each_entry_rcu(ptr, &ccs_policy_list[CCS_ID_DOMAIN_KEEPER], |
364 |
if (ptr->is_deleted) |
head.list) { |
365 |
|
if (ptr->head.is_deleted) |
366 |
continue; |
continue; |
367 |
if (!ptr->is_last_name) { |
if (!ptr->is_last_name) { |
368 |
if (ptr->domainname != domainname) |
if (ptr->domainname != domainname) |
382 |
return flag; |
return flag; |
383 |
} |
} |
384 |
|
|
385 |
/* The list for "struct ccs_alias_entry". */ |
static bool ccs_same_aggregator_entry(const struct ccs_acl_head *a, |
386 |
LIST_HEAD(ccs_alias_list); |
const struct ccs_acl_head *b) |
|
|
|
|
/** |
|
|
* 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 *entry = NULL; |
|
|
struct ccs_alias_entry *ptr; |
|
|
const struct ccs_path_info *saved_original_name; |
|
|
const struct ccs_path_info *saved_aliased_name; |
|
|
int error = is_delete ? -ENOENT : -ENOMEM; |
|
|
if (!ccs_is_correct_path(original_name, 1, -1, -1) || |
|
|
!ccs_is_correct_path(aliased_name, 1, -1, -1)) |
|
|
return -EINVAL; /* No patterns allowed. */ |
|
|
saved_original_name = ccs_get_name(original_name); |
|
|
saved_aliased_name = ccs_get_name(aliased_name); |
|
|
if (!saved_original_name || !saved_aliased_name) { |
|
|
ccs_put_name(saved_original_name); |
|
|
ccs_put_name(saved_aliased_name); |
|
|
return -ENOMEM; |
|
|
} |
|
|
if (!is_delete) |
|
|
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
|
|
mutex_lock(&ccs_policy_lock); |
|
|
list_for_each_entry_rcu(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; |
|
|
break; |
|
|
} |
|
|
if (!is_delete && error && ccs_memory_ok(entry)) { |
|
|
entry->original_name = saved_original_name; |
|
|
saved_original_name = NULL; |
|
|
entry->aliased_name = saved_aliased_name; |
|
|
saved_aliased_name = NULL; |
|
|
list_add_tail_rcu(&entry->list, &ccs_alias_list); |
|
|
entry = NULL; |
|
|
error = 0; |
|
|
} |
|
|
mutex_unlock(&ccs_policy_lock); |
|
|
ccs_put_name(saved_original_name); |
|
|
ccs_put_name(saved_aliased_name); |
|
|
kfree(entry); |
|
|
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. |
|
|
* |
|
|
* Caller holds srcu_read_lock(&ccs_ss). |
|
|
*/ |
|
|
bool ccs_read_alias_policy(struct ccs_io_buffer *head) |
|
387 |
{ |
{ |
388 |
struct list_head *pos; |
const struct ccs_aggregator *p1 = |
389 |
bool done = true; |
container_of(a, typeof(*p1), head); |
390 |
list_for_each_cookie(pos, head->read_var2, &ccs_alias_list) { |
const struct ccs_aggregator *p2 = |
391 |
struct ccs_alias_entry *ptr; |
container_of(b, typeof(*p2), head); |
392 |
ptr = list_entry(pos, struct ccs_alias_entry, list); |
return p1->original_name == p2->original_name && |
393 |
if (ptr->is_deleted) |
p1->aggregated_name == p2->aggregated_name; |
|
continue; |
|
|
done = ccs_io_printf(head, KEYWORD_ALIAS "%s %s\n", |
|
|
ptr->original_name->name, |
|
|
ptr->aliased_name->name); |
|
|
if (!done) |
|
|
break; |
|
|
} |
|
|
return done; |
|
394 |
} |
} |
395 |
|
|
396 |
/** |
/** |
397 |
* ccs_write_alias_policy - Write "struct ccs_alias_entry" list. |
* ccs_update_aggregator_entry - Update "struct ccs_aggregator" 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); |
|
|
} |
|
|
|
|
|
/* The list for "struct ccs_aggregator_entry". */ |
|
|
LIST_HEAD(ccs_aggregator_list); |
|
|
|
|
|
/** |
|
|
* ccs_update_aggregator_entry - Update "struct ccs_aggregator_entry" list. |
|
398 |
* |
* |
399 |
* @original_name: The original program's name. |
* @original_name: The original program's name. |
400 |
* @aggregated_name: The aggregated program's name. |
* @aggregated_name: The aggregated program's name. |
406 |
const char *aggregated_name, |
const char *aggregated_name, |
407 |
const bool is_delete) |
const bool is_delete) |
408 |
{ |
{ |
409 |
struct ccs_aggregator_entry *entry = NULL; |
struct ccs_aggregator e = { }; |
|
struct ccs_aggregator_entry *ptr; |
|
|
const struct ccs_path_info *saved_original_name; |
|
|
const struct ccs_path_info *saved_aggregated_name; |
|
410 |
int error = is_delete ? -ENOENT : -ENOMEM; |
int error = is_delete ? -ENOENT : -ENOMEM; |
411 |
if (!ccs_is_correct_path(original_name, 1, 0, -1) || |
if (!ccs_correct_path(original_name, 1, 0, -1) || |
412 |
!ccs_is_correct_path(aggregated_name, 1, -1, -1)) |
!ccs_correct_path(aggregated_name, 1, -1, -1)) |
413 |
return -EINVAL; |
return -EINVAL; |
414 |
saved_original_name = ccs_get_name(original_name); |
e.original_name = ccs_get_name(original_name); |
415 |
saved_aggregated_name = ccs_get_name(aggregated_name); |
e.aggregated_name = ccs_get_name(aggregated_name); |
416 |
if (!saved_original_name || !saved_aggregated_name) { |
if (!e.original_name || !e.aggregated_name) |
417 |
ccs_put_name(saved_original_name); |
goto out; |
418 |
ccs_put_name(saved_aggregated_name); |
error = ccs_update_policy(&e.head, sizeof(e), is_delete, |
419 |
return -ENOMEM; |
CCS_ID_AGGREGATOR, |
420 |
} |
ccs_same_aggregator_entry); |
421 |
if (!is_delete) |
out: |
422 |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
ccs_put_name(e.original_name); |
423 |
mutex_lock(&ccs_policy_lock); |
ccs_put_name(e.aggregated_name); |
|
list_for_each_entry_rcu(ptr, &ccs_aggregator_list, list) { |
|
|
if (ptr->original_name != saved_original_name || |
|
|
ptr->aggregated_name != saved_aggregated_name) |
|
|
continue; |
|
|
ptr->is_deleted = is_delete; |
|
|
error = 0; |
|
|
break; |
|
|
} |
|
|
if (!is_delete && error && ccs_memory_ok(entry)) { |
|
|
entry->original_name = saved_original_name; |
|
|
saved_original_name = NULL; |
|
|
entry->aggregated_name = saved_aggregated_name; |
|
|
saved_aggregated_name = NULL; |
|
|
list_add_tail_rcu(&entry->list, &ccs_aggregator_list); |
|
|
entry = NULL; |
|
|
error = 0; |
|
|
} |
|
|
mutex_unlock(&ccs_policy_lock); |
|
|
ccs_put_name(saved_original_name); |
|
|
ccs_put_name(saved_aggregated_name); |
|
|
kfree(entry); |
|
|
ccs_update_counter(CCS_UPDATES_COUNTER_EXCEPTION_POLICY); |
|
424 |
return error; |
return error; |
425 |
} |
} |
426 |
|
|
427 |
/** |
/** |
428 |
* ccs_read_aggregator_policy - Read "struct ccs_aggregator_entry" list. |
* ccs_write_aggregator - Write "struct ccs_aggregator" list. |
|
* |
|
|
* @head: Pointer to "struct ccs_io_buffer". |
|
|
* |
|
|
* Returns true on success, false otherwise. |
|
|
* |
|
|
* Caller holds srcu_read_lock(&ccs_ss). |
|
|
*/ |
|
|
bool ccs_read_aggregator_policy(struct ccs_io_buffer *head) |
|
|
{ |
|
|
struct list_head *pos; |
|
|
bool done = true; |
|
|
list_for_each_cookie(pos, head->read_var2, &ccs_aggregator_list) { |
|
|
struct ccs_aggregator_entry *ptr; |
|
|
ptr = list_entry(pos, struct ccs_aggregator_entry, list); |
|
|
if (ptr->is_deleted) |
|
|
continue; |
|
|
done = ccs_io_printf(head, KEYWORD_AGGREGATOR "%s %s\n", |
|
|
ptr->original_name->name, |
|
|
ptr->aggregated_name->name); |
|
|
if (!done) |
|
|
break; |
|
|
} |
|
|
return done; |
|
|
} |
|
|
|
|
|
/** |
|
|
* ccs_write_aggregator_policy - Write "struct ccs_aggregator_entry" list. |
|
429 |
* |
* |
430 |
* @data: String to parse. |
* @data: String to parse. |
431 |
* @is_delete: True if it is a delete request. |
* @is_delete: True if it is a delete request. |
432 |
* |
* |
433 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
434 |
*/ |
*/ |
435 |
int ccs_write_aggregator_policy(char *data, const bool is_delete) |
int ccs_write_aggregator(char *data, const bool is_delete, const u8 flags) |
436 |
{ |
{ |
437 |
char *cp = strchr(data, ' '); |
char *w[2]; |
438 |
if (!cp) |
if (!ccs_tokenize(data, w, sizeof(w)) || !w[1][0]) |
439 |
return -EINVAL; |
return -EINVAL; |
440 |
*cp++ = '\0'; |
return ccs_update_aggregator_entry(w[0], w[1], is_delete); |
|
return ccs_update_aggregator_entry(data, cp, is_delete); |
|
441 |
} |
} |
442 |
|
|
443 |
/* Domain create/delete handler. */ |
/* Domain create/delete handler. */ |
455 |
struct ccs_path_info name; |
struct ccs_path_info name; |
456 |
name.name = domainname; |
name.name = domainname; |
457 |
ccs_fill_path_info(&name); |
ccs_fill_path_info(&name); |
458 |
mutex_lock(&ccs_policy_lock); |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
459 |
|
return 0; |
460 |
/* Is there an active domain? */ |
/* Is there an active domain? */ |
461 |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
462 |
/* Never delete ccs_kernel_domain */ |
/* Never delete ccs_kernel_domain */ |
473 |
} |
} |
474 |
|
|
475 |
/** |
/** |
476 |
* ccs_find_or_assign_new_domain - Create a domain. |
* ccs_assign_domain - Create a domain. |
477 |
* |
* |
478 |
* @domainname: The name of domain. |
* @domainname: The name of domain. |
479 |
* @profile: Profile number to assign if the domain was newly created. |
* @profile: Profile number to assign if the domain was newly created. |
480 |
* |
* |
481 |
* Returns pointer to "struct ccs_domain_info" on success, NULL otherwise. |
* Returns pointer to "struct ccs_domain_info" on success, NULL otherwise. |
482 |
*/ |
*/ |
483 |
struct ccs_domain_info *ccs_find_or_assign_new_domain(const char *domainname, |
struct ccs_domain_info *ccs_assign_domain(const char *domainname, |
484 |
const u8 profile) |
const u8 profile) |
485 |
{ |
{ |
486 |
struct ccs_domain_info *entry; |
struct ccs_domain_info *entry; |
487 |
struct ccs_domain_info *domain; |
struct ccs_domain_info *domain = NULL; |
488 |
const struct ccs_path_info *saved_domainname; |
const struct ccs_path_info *saved_domainname; |
489 |
bool found = false; |
bool found = false; |
490 |
|
|
491 |
if (!ccs_is_correct_domain(domainname)) |
if (!ccs_correct_domain(domainname)) |
492 |
return NULL; |
return NULL; |
493 |
saved_domainname = ccs_get_name(domainname); |
saved_domainname = ccs_get_name(domainname); |
494 |
if (!saved_domainname) |
if (!saved_domainname) |
495 |
return NULL; |
return NULL; |
496 |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
entry = kzalloc(sizeof(*entry), CCS_GFP_FLAGS); |
497 |
mutex_lock(&ccs_policy_lock); |
if (mutex_lock_interruptible(&ccs_policy_lock)) |
498 |
|
goto out; |
499 |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
list_for_each_entry_rcu(domain, &ccs_domain_list, list) { |
500 |
if (domain->is_deleted || |
if (domain->is_deleted || |
501 |
ccs_pathcmp(saved_domainname, domain->domainname)) |
ccs_pathcmp(saved_domainname, domain->domainname)) |
503 |
found = true; |
found = true; |
504 |
break; |
break; |
505 |
} |
} |
506 |
if (!found && ccs_memory_ok(entry)) { |
if (!found && ccs_memory_ok(entry, sizeof(*entry))) { |
507 |
INIT_LIST_HEAD(&entry->acl_info_list); |
INIT_LIST_HEAD(&entry->acl_info_list); |
508 |
entry->domainname = saved_domainname; |
entry->domainname = saved_domainname; |
509 |
saved_domainname = NULL; |
saved_domainname = NULL; |
514 |
found = true; |
found = true; |
515 |
} |
} |
516 |
mutex_unlock(&ccs_policy_lock); |
mutex_unlock(&ccs_policy_lock); |
517 |
|
out: |
518 |
ccs_put_name(saved_domainname); |
ccs_put_name(saved_domainname); |
519 |
kfree(entry); |
kfree(entry); |
520 |
return found ? domain : NULL; |
return found ? domain : NULL; |
521 |
} |
} |
522 |
|
|
523 |
/** |
/** |
|
* 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; |
|
|
} |
|
|
return true; |
|
|
out: |
|
|
return false; |
|
|
} |
|
|
|
|
|
/** |
|
524 |
* ccs_find_next_domain - Find a domain. |
* ccs_find_next_domain - Find a domain. |
525 |
* |
* |
526 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve". |
527 |
* |
* |
528 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
529 |
* |
* |
530 |
* Caller holds srcu_read_lock(&ccs_ss). |
* Caller holds ccs_read_lock(). |
531 |
*/ |
*/ |
532 |
static int ccs_find_next_domain(struct ccs_execve_entry *ee) |
static int ccs_find_next_domain(struct ccs_execve *ee) |
533 |
{ |
{ |
534 |
struct ccs_request_info *r = &ee->r; |
struct ccs_request_info *r = &ee->r; |
535 |
const struct ccs_path_info *handler = ee->handler; |
const struct ccs_path_info *handler = ee->handler; |
536 |
struct ccs_domain_info *domain = NULL; |
struct ccs_domain_info *domain = NULL; |
537 |
const char *old_domain_name = r->domain->domainname->name; |
struct ccs_domain_info * const old_domain = ccs_current_domain(); |
538 |
|
const char *old_domain_name = old_domain->domainname->name; |
539 |
struct linux_binprm *bprm = ee->bprm; |
struct linux_binprm *bprm = ee->bprm; |
540 |
const u8 mode = r->mode; |
struct task_struct *task = current; |
541 |
const bool is_enforce = (mode == 3); |
const u32 ccs_flags = task->ccs_flags; |
542 |
const u32 ccs_flags = current->ccs_flags; |
struct ccs_path_info rn = { }; /* real name */ |
|
char *new_domain_name = NULL; |
|
|
struct ccs_path_info rn; /* real name */ |
|
|
struct ccs_path_info sn; /* symlink name */ |
|
543 |
struct ccs_path_info ln; /* last name */ |
struct ccs_path_info ln; /* last name */ |
544 |
int retval; |
int retval; |
545 |
|
bool need_kfree = false; |
546 |
|
bool domain_created = false; |
547 |
|
ln.name = ccs_last_word(old_domain_name); |
548 |
|
ccs_fill_path_info(&ln); |
549 |
retry: |
retry: |
550 |
current->ccs_flags = ccs_flags; |
current->ccs_flags = ccs_flags; |
551 |
r->cond = NULL; |
r->cond = NULL; |
552 |
/* Get realpath of program and symbolic link. */ |
if (need_kfree) { |
553 |
retval = ccs_realpath_both(bprm->filename, ee); |
kfree(rn.name); |
554 |
|
need_kfree = false; |
555 |
|
} |
556 |
|
|
557 |
|
/* Get symlink's pathname of program. */ |
558 |
|
retval = ccs_symlink_path(bprm->filename, &rn); |
559 |
if (retval < 0) |
if (retval < 0) |
560 |
goto out; |
goto out; |
561 |
|
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); |
|
562 |
|
|
563 |
if (handler) { |
if (handler) { |
564 |
if (ccs_pathcmp(&rn, handler)) { |
if (ccs_pathcmp(&rn, handler)) { |
571 |
} |
} |
572 |
goto out; |
goto out; |
573 |
} |
} |
574 |
goto calculate_domain; |
} else { |
575 |
} |
struct ccs_aggregator *ptr; |
576 |
|
/* Check 'aggregator' directive. */ |
577 |
/* Check 'alias' directive. */ |
list_for_each_entry_rcu(ptr, |
578 |
if (ccs_pathcmp(&rn, &sn)) { |
&ccs_policy_list[CCS_ID_AGGREGATOR], |
579 |
struct ccs_alias_entry *ptr; |
head.list) { |
580 |
/* Is this program allowed to be called via symbolic links? */ |
if (ptr->head.is_deleted || |
581 |
list_for_each_entry_rcu(ptr, &ccs_alias_list, list) { |
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
|
if (ptr->is_deleted || |
|
|
ccs_pathcmp(&rn, ptr->original_name) || |
|
|
ccs_pathcmp(&sn, ptr->aliased_name)) |
|
582 |
continue; |
continue; |
583 |
strncpy(ee->program_path, ptr->aliased_name->name, |
kfree(rn.name); |
584 |
CCS_MAX_PATHNAME_LEN - 1); |
need_kfree = false; |
585 |
ccs_fill_path_info(&rn); |
/* This is OK because it is read only. */ |
586 |
|
rn = *ptr->aggregated_name; |
587 |
break; |
break; |
588 |
} |
} |
|
} |
|
|
/* sn will be overwritten after here. */ |
|
589 |
|
|
590 |
/* Compare basename of program_path and argv[0] */ |
/* Check execute permission. */ |
591 |
r->mode = ccs_check_flags(r->domain, CCS_MAC_FOR_ARGV0); |
retval = ccs_exec_perm(r, &rn); |
592 |
if (bprm->argc > 0 && r->mode) { |
if (retval == CCS_RETRY_REQUEST) |
593 |
char *base_argv0 = ee->tmp; |
goto retry; |
594 |
const char *base_filename; |
if (retval < 0) |
|
retval = -ENOMEM; |
|
|
if (!ccs_get_argv0(ee)) |
|
595 |
goto out; |
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. */ |
|
|
{ |
|
|
struct ccs_aggregator_entry *ptr; |
|
|
/* Is this program allowed to be aggregated? */ |
|
|
list_for_each_entry_rcu(ptr, &ccs_aggregator_list, list) { |
|
|
if (ptr->is_deleted || |
|
|
!ccs_path_matches_pattern(&rn, ptr->original_name)) |
|
|
continue; |
|
|
strncpy(ee->program_path, ptr->aggregated_name->name, |
|
|
CCS_MAX_PATHNAME_LEN - 1); |
|
|
ccs_fill_path_info(&rn); |
|
|
break; |
|
|
} |
|
596 |
} |
} |
597 |
|
|
598 |
/* Check execute permission. */ |
/* Calculate domain to transit to. */ |
599 |
r->mode = mode; |
if (ccs_domain_initializer(old_domain->domainname, &rn, &ln)) { |
|
retval = ccs_check_exec_perm(r, &rn); |
|
|
if (retval == 1) |
|
|
goto retry; |
|
|
if (retval < 0) |
|
|
goto out; |
|
|
|
|
|
calculate_domain: |
|
|
new_domain_name = ee->tmp; |
|
|
if (ccs_is_domain_initializer(r->domain->domainname, &rn, &ln)) { |
|
600 |
/* Transit to the child of ccs_kernel_domain domain. */ |
/* Transit to the child of ccs_kernel_domain domain. */ |
601 |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, ROOT_NAME " " "%s", |
602 |
ROOT_NAME " " "%s", ee->program_path); |
rn.name); |
603 |
} else if (r->domain == &ccs_kernel_domain && !ccs_policy_loaded) { |
} else if (old_domain == &ccs_kernel_domain && !ccs_policy_loaded) { |
604 |
/* |
/* |
605 |
* Needn't to transit from kernel domain before starting |
* Needn't to transit from kernel domain before starting |
606 |
* /sbin/init. But transit from kernel domain if executing |
* /sbin/init. But transit from kernel domain if executing |
607 |
* initializers because they might start before /sbin/init. |
* initializers because they might start before /sbin/init. |
608 |
*/ |
*/ |
609 |
domain = r->domain; |
domain = old_domain; |
610 |
} else if (ccs_is_domain_keeper(r->domain->domainname, &rn, &ln)) { |
} else if (ccs_domain_keeper(old_domain->domainname, &rn, &ln)) { |
611 |
/* Keep current domain. */ |
/* Keep current domain. */ |
612 |
domain = r->domain; |
domain = old_domain; |
613 |
} else { |
} else { |
614 |
/* Normal domain transition. */ |
/* Normal domain transition. */ |
615 |
snprintf(new_domain_name, CCS_EXEC_TMPSIZE - 1, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s %s", |
616 |
"%s %s", old_domain_name, ee->program_path); |
old_domain_name, rn.name); |
617 |
} |
} |
618 |
if (domain || strlen(new_domain_name) >= CCS_MAX_PATHNAME_LEN) |
if (domain || strlen(ee->tmp) >= CCS_EXEC_TMPSIZE - 10) |
619 |
goto done; |
goto done; |
620 |
domain = ccs_find_domain(new_domain_name); |
domain = ccs_find_domain(ee->tmp); |
621 |
if (domain) |
if (domain) |
622 |
goto done; |
goto done; |
623 |
if (is_enforce) { |
if (r->mode == CCS_CONFIG_ENFORCING) { |
624 |
int error = ccs_check_supervisor(r, |
int error = ccs_supervisor(r, "# wants to create domain\n" |
625 |
"# wants to create domain\n" |
"%s\n", ee->tmp); |
626 |
"%s\n", new_domain_name); |
if (error == CCS_RETRY_REQUEST) |
|
if (error == 1) |
|
627 |
goto retry; |
goto retry; |
628 |
if (error < 0) |
if (error < 0) |
629 |
goto done; |
goto done; |
630 |
} |
} |
631 |
domain = ccs_find_or_assign_new_domain(new_domain_name, r->profile); |
domain = ccs_assign_domain(ee->tmp, r->profile); |
632 |
if (domain) |
if (domain) |
633 |
ccs_audit_domain_creation_log(r->domain); |
domain_created = true; |
634 |
done: |
done: |
635 |
if (!domain) { |
if (!domain) { |
636 |
printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n", |
retval = (r->mode == CCS_CONFIG_ENFORCING) ? -EPERM : 0; |
637 |
new_domain_name); |
if (!old_domain->domain_transition_failed) { |
638 |
if (is_enforce) |
old_domain->domain_transition_failed = true; |
639 |
retval = -EPERM; |
ccs_write_log(false, r, CCS_KEYWORD_TRANSITION_FAILED |
640 |
else { |
"\n"); |
641 |
retval = 0; |
printk(KERN_WARNING |
642 |
r->domain->domain_transition_failed = true; |
"ERROR: Domain '%s' not defined.\n", ee->tmp); |
643 |
} |
} |
644 |
} else { |
} else { |
645 |
retval = 0; |
retval = 0; |
646 |
} |
} |
647 |
out: |
if (!retval && handler) |
648 |
|
ccs_audit_execute_handler_log(ee); |
649 |
|
/* |
650 |
|
* Tell GC that I started execve(). |
651 |
|
* Also, tell open_exec() to check read permission. |
652 |
|
*/ |
653 |
|
task->ccs_flags |= CCS_TASK_IS_IN_EXECVE; |
654 |
|
/* |
655 |
|
* Make task->ccs_flags visible to GC before changing |
656 |
|
* task->ccs_domain_info . |
657 |
|
*/ |
658 |
|
smp_mb(); |
659 |
|
/* |
660 |
|
* Proceed to the next domain in order to allow reaching via PID. |
661 |
|
* It will be reverted if execve() failed. Reverting is not good. |
662 |
|
* But it is better than being unable to reach via PID in interactive |
663 |
|
* enforcing mode. |
664 |
|
*/ |
665 |
if (domain) |
if (domain) |
666 |
r->domain = domain; |
task->ccs_domain_info = domain; |
667 |
|
if (domain_created) |
668 |
|
ccs_audit_domain_creation_log(); |
669 |
|
out: |
670 |
|
if (need_kfree) |
671 |
|
kfree(rn.name); |
672 |
return retval; |
return retval; |
673 |
} |
} |
674 |
|
|
675 |
/** |
/** |
676 |
* ccs_check_environ - Check permission for environment variable names. |
* ccs_environ - Check permission for environment variable names. |
677 |
* |
* |
678 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve". |
679 |
* |
* |
680 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
681 |
*/ |
*/ |
682 |
static int ccs_check_environ(struct ccs_execve_entry *ee) |
static int ccs_environ(struct ccs_execve *ee) |
683 |
{ |
{ |
684 |
struct ccs_request_info *r = &ee->r; |
struct ccs_request_info *r = &ee->r; |
685 |
struct linux_binprm *bprm = ee->bprm; |
struct linux_binprm *bprm = ee->bprm; |
686 |
char *arg_ptr = ee->tmp; |
/* env_page->data is allocated by ccs_dump_page(). */ |
687 |
|
struct ccs_page_dump env_page = { }; |
688 |
|
char *arg_ptr; /* Size is CCS_EXEC_TMPSIZE bytes */ |
689 |
int arg_len = 0; |
int arg_len = 0; |
690 |
unsigned long pos = bprm->p; |
unsigned long pos = bprm->p; |
691 |
int offset = pos % PAGE_SIZE; |
int offset = pos % PAGE_SIZE; |
693 |
int envp_count = bprm->envc; |
int envp_count = bprm->envc; |
694 |
/* printk(KERN_DEBUG "start %d %d\n", argv_count, envp_count); */ |
/* printk(KERN_DEBUG "start %d %d\n", argv_count, envp_count); */ |
695 |
int error = -ENOMEM; |
int error = -ENOMEM; |
696 |
|
ee->r.type = CCS_MAC_ENVIRON; |
697 |
|
ee->r.mode = ccs_get_mode(ccs_current_domain()->profile, |
698 |
|
CCS_MAC_ENVIRON); |
699 |
if (!r->mode || !envp_count) |
if (!r->mode || !envp_count) |
700 |
return 0; |
return 0; |
701 |
|
arg_ptr = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS); |
702 |
|
if (!arg_ptr) |
703 |
|
goto out; |
704 |
while (error == -ENOMEM) { |
while (error == -ENOMEM) { |
705 |
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
if (!ccs_dump_page(bprm, pos, &env_page)) |
706 |
goto out; |
goto out; |
707 |
pos += PAGE_SIZE - offset; |
pos += PAGE_SIZE - offset; |
708 |
/* Read. */ |
/* Read. */ |
709 |
while (argv_count && offset < PAGE_SIZE) { |
while (argv_count && offset < PAGE_SIZE) { |
710 |
const char *kaddr = ee->dump.data; |
if (!env_page.data[offset++]) |
|
if (!kaddr[offset++]) |
|
711 |
argv_count--; |
argv_count--; |
712 |
} |
} |
713 |
if (argv_count) { |
if (argv_count) { |
715 |
continue; |
continue; |
716 |
} |
} |
717 |
while (offset < PAGE_SIZE) { |
while (offset < PAGE_SIZE) { |
718 |
const char *kaddr = ee->dump.data; |
const unsigned char c = env_page.data[offset++]; |
719 |
const unsigned char c = kaddr[offset++]; |
if (c && arg_len < CCS_EXEC_TMPSIZE - 10) { |
|
if (c && arg_len < CCS_MAX_PATHNAME_LEN - 10) { |
|
720 |
if (c == '=') { |
if (c == '=') { |
721 |
arg_ptr[arg_len++] = '\0'; |
arg_ptr[arg_len++] = '\0'; |
722 |
} else if (c == '\\') { |
} else if (c == '\\') { |
736 |
} |
} |
737 |
if (c) |
if (c) |
738 |
continue; |
continue; |
739 |
if (ccs_check_env_perm(r, arg_ptr)) { |
if (ccs_env_perm(r, arg_ptr)) { |
740 |
error = -EPERM; |
error = -EPERM; |
741 |
break; |
break; |
742 |
} |
} |
751 |
out: |
out: |
752 |
if (r->mode != 3) |
if (r->mode != 3) |
753 |
error = 0; |
error = 0; |
754 |
|
kfree(env_page.data); |
755 |
|
kfree(arg_ptr); |
756 |
return error; |
return error; |
757 |
} |
} |
758 |
|
|
803 |
* |
* |
804 |
* Returns number of directories to strip. |
* Returns number of directories to strip. |
805 |
*/ |
*/ |
806 |
static inline int ccs_root_depth(struct dentry *dentry, struct vfsmount *vfsmnt) |
static 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->srcu_idx = srcu_read_lock(&ccs_ss); |
|
|
/* 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); |
|
|
srcu_read_unlock(&ccs_ss, ee->srcu_idx); |
|
|
ccs_free(ee); |
|
|
} |
|
|
|
|
860 |
/** |
/** |
861 |
* ccs_try_alt_exec - Try to start execute handler. |
* ccs_try_alt_exec - Try to start execute handler. |
862 |
* |
* |
863 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve". |
864 |
* |
* |
865 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
866 |
*/ |
*/ |
867 |
static int ccs_try_alt_exec(struct ccs_execve_entry *ee) |
static int ccs_try_alt_exec(struct ccs_execve *ee) |
868 |
{ |
{ |
869 |
/* |
/* |
870 |
* Contents of modified bprm. |
* Contents of modified bprm. |
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; |
960 |
"pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d " |
"pid=%d uid=%d gid=%d euid=%d egid=%d suid=%d " |
961 |
"sgid=%d fsuid=%d fsgid=%d state[0]=%u " |
"sgid=%d fsuid=%d fsgid=%d state[0]=%u " |
962 |
"state[1]=%u state[2]=%u", |
"state[1]=%u state[2]=%u", |
963 |
(pid_t) sys_getpid(), current_uid(), current_gid(), |
(pid_t) ccsecurity_exports.sys_getpid(), |
964 |
current_euid(), current_egid(), current_suid(), |
current_uid(), current_gid(), current_euid(), |
965 |
current_sgid(), current_fsuid(), current_fsgid(), |
current_egid(), current_suid(), current_sgid(), |
966 |
|
current_fsuid(), current_fsgid(), |
967 |
(u8) (ccs_flags >> 24), (u8) (ccs_flags >> 16), |
(u8) (ccs_flags >> 24), (u8) (ccs_flags >> 16), |
968 |
(u8) (ccs_flags >> 8)); |
(u8) (ccs_flags >> 8)); |
969 |
retval = copy_strings_kernel(1, &cp, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
977 |
char *exe = (char *) ccs_get_exe(); |
char *exe = (char *) ccs_get_exe(); |
978 |
if (exe) { |
if (exe) { |
979 |
retval = copy_strings_kernel(1, &exe, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
980 |
ccs_free(exe); |
kfree(exe); |
981 |
} else { |
} else { |
982 |
exe = ee->tmp; |
exe = ee->tmp; |
983 |
strncpy(ee->tmp, "<unknown>", CCS_EXEC_TMPSIZE - 1); |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "<unknown>"); |
984 |
retval = copy_strings_kernel(1, &exe, bprm); |
retval = copy_strings_kernel(1, &exe, bprm); |
985 |
} |
} |
986 |
if (retval < 0) |
if (retval < 0) |
991 |
/* Set argv[1] */ |
/* Set argv[1] */ |
992 |
{ |
{ |
993 |
char *cp = ee->tmp; |
char *cp = ee->tmp; |
994 |
strncpy(ee->tmp, ccs_current_domain()->domainname->name, |
snprintf(ee->tmp, CCS_EXEC_TMPSIZE - 1, "%s", |
995 |
CCS_EXEC_TMPSIZE - 1); |
ccs_current_domain()->domainname->name); |
996 |
retval = copy_strings_kernel(1, &cp, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
997 |
if (retval < 0) |
if (retval < 0) |
998 |
goto out; |
goto out; |
1002 |
/* Set argv[0] */ |
/* Set argv[0] */ |
1003 |
{ |
{ |
1004 |
int depth = ccs_get_root_depth(); |
int depth = ccs_get_root_depth(); |
1005 |
char *cp = ee->program_path; |
int len = ee->handler->total_len + 1; |
1006 |
strncpy(cp, ee->handler->name, CCS_MAX_PATHNAME_LEN - 1); |
char *cp = kmalloc(len, CCS_GFP_FLAGS); |
1007 |
|
if (!cp) { |
1008 |
|
retval = -ENOMEM; |
1009 |
|
goto out; |
1010 |
|
} |
1011 |
|
ee->handler_path = cp; |
1012 |
|
memmove(cp, ee->handler->name, len); |
1013 |
ccs_unescape(cp); |
ccs_unescape(cp); |
1014 |
retval = -ENOENT; |
retval = -ENOENT; |
1015 |
if (!*cp || *cp != '/') |
if (!*cp || *cp != '/') |
1021 |
goto out; |
goto out; |
1022 |
depth--; |
depth--; |
1023 |
} |
} |
1024 |
memmove(ee->program_path, cp, strlen(cp) + 1); |
memmove(ee->handler_path, cp, strlen(cp) + 1); |
1025 |
cp = ee->program_path; |
cp = ee->handler_path; |
1026 |
retval = copy_strings_kernel(1, &cp, bprm); |
retval = copy_strings_kernel(1, &cp, bprm); |
1027 |
if (retval < 0) |
if (retval < 0) |
1028 |
goto out; |
goto out; |
1034 |
#endif |
#endif |
1035 |
#endif |
#endif |
1036 |
|
|
1037 |
/* OK, now restart the process with execute handler program's dentry. */ |
/* |
1038 |
filp = open_exec(ee->program_path); |
* OK, now restart the process with execute handler program's dentry. |
1039 |
|
*/ |
1040 |
|
filp = open_exec(ee->handler_path); |
1041 |
if (IS_ERR(filp)) { |
if (IS_ERR(filp)) { |
1042 |
retval = PTR_ERR(filp); |
retval = PTR_ERR(filp); |
1043 |
goto out; |
goto out; |
1044 |
} |
} |
1045 |
|
ee->obj.path1.dentry = filp->f_dentry; |
1046 |
|
ee->obj.path1.mnt = filp->f_vfsmnt; |
1047 |
bprm->file = filp; |
bprm->file = filp; |
1048 |
bprm->filename = ee->program_path; |
bprm->filename = ee->handler_path; |
1049 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) |
1050 |
bprm->interp = bprm->filename; |
bprm->interp = bprm->filename; |
1051 |
#endif |
#endif |
1052 |
retval = prepare_binprm(bprm); |
retval = prepare_binprm(bprm); |
1053 |
if (retval < 0) |
if (retval < 0) |
1054 |
goto out; |
goto out; |
1055 |
{ |
task->ccs_flags |= CCS_DONT_SLEEP_ON_ENFORCE_ERROR; |
1056 |
/* |
retval = ccs_find_next_domain(ee); |
1057 |
* 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); |
|
|
} |
|
1058 |
out: |
out: |
1059 |
return retval; |
return retval; |
1060 |
} |
} |
1062 |
/** |
/** |
1063 |
* ccs_find_execute_handler - Find an execute handler. |
* ccs_find_execute_handler - Find an execute handler. |
1064 |
* |
* |
1065 |
* @ee: Pointer to "struct ccs_execve_entry". |
* @ee: Pointer to "struct ccs_execve". |
1066 |
* @type: Type of execute handler. |
* @type: Type of execute handler. |
1067 |
* |
* |
1068 |
* Returns true if found, false otherwise. |
* Returns true if found, false otherwise. |
1069 |
* |
* |
1070 |
* Caller holds srcu_read_lock(&ccs_ss). |
* Caller holds ccs_read_lock(). |
1071 |
*/ |
*/ |
1072 |
static bool ccs_find_execute_handler(struct ccs_execve_entry *ee, |
static bool ccs_find_execute_handler(struct ccs_execve *ee, |
1073 |
const u8 type) |
const u8 type) |
1074 |
{ |
{ |
1075 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1076 |
const struct ccs_domain_info *domain = ccs_current_domain(); |
const struct ccs_domain_info * const domain = ccs_current_domain(); |
1077 |
struct ccs_acl_info *ptr; |
struct ccs_acl_info *ptr; |
1078 |
bool found = false; |
bool found = false; |
1079 |
/* |
/* |
1089 |
acl = container_of(ptr, struct ccs_execute_handler_record, |
acl = container_of(ptr, struct ccs_execute_handler_record, |
1090 |
head); |
head); |
1091 |
ee->handler = acl->handler; |
ee->handler = acl->handler; |
1092 |
|
ee->handler_type = type; |
1093 |
found = true; |
found = true; |
1094 |
break; |
break; |
1095 |
} |
} |
1109 |
struct ccs_page_dump *dump) |
struct ccs_page_dump *dump) |
1110 |
{ |
{ |
1111 |
struct page *page; |
struct page *page; |
1112 |
/* dump->data is released by ccs_free_execve_entry(). */ |
/* dump->data is released by ccs_finish_execve(). */ |
1113 |
if (!dump->data) { |
if (!dump->data) { |
1114 |
dump->data = kmalloc(PAGE_SIZE, GFP_KERNEL); |
dump->data = kzalloc(PAGE_SIZE, CCS_GFP_FLAGS); |
1115 |
if (!dump->data) |
if (!dump->data) |
1116 |
return false; |
return false; |
1117 |
} |
} |
1119 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1120 |
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) |
1121 |
return false; |
return false; |
1122 |
#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) |
1123 |
|
if (get_user_pages(current, bprm->mm, pos, 1, 0, 1, &page, NULL) <= 0) |
1124 |
|
return false; |
1125 |
|
#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2 && defined(CONFIG_MMU) |
1126 |
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) |
1127 |
return false; |
return false; |
1128 |
#else |
#else |
1137 |
*/ |
*/ |
1138 |
char *kaddr = kmap_atomic(page, KM_USER0); |
char *kaddr = kmap_atomic(page, KM_USER0); |
1139 |
dump->page = page; |
dump->page = page; |
1140 |
memcpy(dump->data + offset, kaddr + offset, PAGE_SIZE - offset); |
memcpy(dump->data + offset, kaddr + offset, |
1141 |
|
PAGE_SIZE - offset); |
1142 |
kunmap_atomic(kaddr, KM_USER0); |
kunmap_atomic(kaddr, KM_USER0); |
1143 |
} |
} |
1144 |
/* Same with put_arg_page(page) in fs/exec.c */ |
/* Same with put_arg_page(page) in fs/exec.c */ |
1145 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) && defined(CONFIG_MMU) |
1146 |
put_page(page); |
put_page(page); |
1147 |
#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) |
1148 |
|
put_page(page); |
1149 |
|
#elif defined(AX_MAJOR) && AX_MAJOR == 3 && defined(AX_MINOR) && AX_MINOR >= 2 && defined(CONFIG_MMU) |
1150 |
put_page(page); |
put_page(page); |
1151 |
#endif |
#endif |
1152 |
return true; |
return true; |
1153 |
} |
} |
1154 |
|
|
1155 |
/** |
/** |
|
* 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->r.domain; |
|
|
if (!next_domain) |
|
|
next_domain = ccs_current_domain(); |
|
|
return next_domain; |
|
|
} |
|
|
|
|
|
/** |
|
1156 |
* ccs_start_execve - Prepare for execve() operation. |
* ccs_start_execve - Prepare for execve() operation. |
1157 |
* |
* |
1158 |
* @bprm: Pointer to "struct linux_binprm". |
* @bprm: Pointer to "struct linux_binprm". |
1159 |
|
* @eep: Pointer to "struct ccs_execve *". |
1160 |
* |
* |
1161 |
* Returns 0 on success, negative value otherwise. |
* Returns 0 on success, negative value otherwise. |
1162 |
*/ |
*/ |
1163 |
int ccs_start_execve(struct linux_binprm *bprm) |
static int ccs_start_execve(struct linux_binprm *bprm, |
1164 |
|
struct ccs_execve **eep) |
1165 |
{ |
{ |
1166 |
int retval; |
int retval; |
1167 |
struct task_struct *task = current; |
struct task_struct *task = current; |
1168 |
struct ccs_execve_entry *ee = ccs_allocate_execve_entry(); |
struct ccs_execve *ee; |
1169 |
if (!ccs_policy_loaded) |
*eep = NULL; |
1170 |
ccs_load_policy(bprm->filename); |
ee = kzalloc(sizeof(*ee), CCS_GFP_FLAGS); |
1171 |
if (!ee) |
if (!ee) |
1172 |
return -ENOMEM; |
return -ENOMEM; |
1173 |
ccs_init_request_info(&ee->r, NULL, CCS_MAC_FOR_FILE); |
ee->tmp = kzalloc(CCS_EXEC_TMPSIZE, CCS_GFP_FLAGS); |
1174 |
|
if (!ee->tmp) { |
1175 |
|
kfree(ee); |
1176 |
|
return -ENOMEM; |
1177 |
|
} |
1178 |
|
ee->reader_idx = ccs_read_lock(); |
1179 |
|
/* ee->dump->data is allocated by ccs_dump_page(). */ |
1180 |
|
ee->previous_domain = task->ccs_domain_info; |
1181 |
|
/* Clear manager flag. */ |
1182 |
|
task->ccs_flags &= ~CCS_TASK_IS_MANAGER; |
1183 |
|
*eep = ee; |
1184 |
|
ccs_init_request_info(&ee->r, CCS_MAC_FILE_EXECUTE); |
1185 |
ee->r.ee = ee; |
ee->r.ee = ee; |
1186 |
ee->bprm = bprm; |
ee->bprm = bprm; |
1187 |
ee->r.obj = &ee->obj; |
ee->r.obj = &ee->obj; |
1188 |
ee->obj.path1_dentry = bprm->file->f_dentry; |
ee->obj.path1.dentry = bprm->file->f_dentry; |
1189 |
ee->obj.path1_vfsmnt = bprm->file->f_vfsmnt; |
ee->obj.path1.mnt = bprm->file->f_vfsmnt; |
1190 |
/* Clear manager flag. */ |
/* |
1191 |
task->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
* No need to call ccs_environ() for execute handler because envp[] is |
1192 |
if (ccs_find_execute_handler(ee, TYPE_EXECUTE_HANDLER)) { |
* moved to argv[]. |
1193 |
retval = ccs_try_alt_exec(ee); |
*/ |
1194 |
if (!retval) |
if (ccs_find_execute_handler(ee, CCS_TYPE_EXECUTE_HANDLER)) |
1195 |
ccs_audit_execute_handler_log(ee, true); |
return ccs_try_alt_exec(ee); |
|
goto ok; |
|
|
} |
|
1196 |
retval = ccs_find_next_domain(ee); |
retval = ccs_find_next_domain(ee); |
1197 |
if (retval != -EPERM) |
if (retval == -EPERM) { |
1198 |
goto ok; |
if (ccs_find_execute_handler(ee, |
1199 |
if (ccs_find_execute_handler(ee, TYPE_DENIED_EXECUTE_HANDLER)) { |
CCS_TYPE_DENIED_EXECUTE_HANDLER)) |
1200 |
retval = ccs_try_alt_exec(ee); |
return ccs_try_alt_exec(ee); |
|
if (!retval) |
|
|
ccs_audit_execute_handler_log(ee, false); |
|
1201 |
} |
} |
1202 |
ok: |
if (!retval) |
1203 |
if (retval < 0) |
retval = ccs_environ(ee); |
|
goto out; |
|
|
ee->r.mode = ccs_check_flags(ee->r.domain, CCS_MAC_FOR_ENV); |
|
|
retval = ccs_check_environ(ee); |
|
|
if (retval < 0) |
|
|
goto out; |
|
|
task->ccs_flags |= CCS_CHECK_READ_FOR_OPEN_EXEC; |
|
|
retval = 0; |
|
|
out: |
|
|
if (retval) |
|
|
ccs_finish_execve(retval); |
|
1204 |
return retval; |
return retval; |
1205 |
} |
} |
1206 |
|
|
1208 |
* ccs_finish_execve - Clean up execve() operation. |
* ccs_finish_execve - Clean up execve() operation. |
1209 |
* |
* |
1210 |
* @retval: Return code of an execve() operation. |
* @retval: Return code of an execve() operation. |
1211 |
|
* @ee: Pointer to "struct ccs_execve". |
1212 |
* |
* |
1213 |
* Caller holds srcu_read_lock(&ccs_ss). |
* Caller holds ccs_read_lock(). |
1214 |
*/ |
*/ |
1215 |
void ccs_finish_execve(int retval) |
static void ccs_finish_execve(int retval, struct ccs_execve *ee) |
1216 |
{ |
{ |
1217 |
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; |
|
1218 |
if (!ee) |
if (!ee) |
1219 |
return; |
return; |
1220 |
if (retval < 0) |
if (retval < 0) { |
1221 |
goto out; |
task->ccs_domain_info = ee->previous_domain; |
1222 |
/* Proceed to next domain if execution suceeded. */ |
/* |
1223 |
task->ccs_domain_info = ee->r.domain; |
* Make task->ccs_domain_info visible to GC before changing |
1224 |
/* Mark the current process as execute handler. */ |
* task->ccs_flags . |
1225 |
if (ee->handler) |
*/ |
1226 |
task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER; |
smp_mb(); |
1227 |
/* Mark the current process as normal process. */ |
} else { |
1228 |
else |
/* Mark the current process as execute handler. */ |
1229 |
task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER; |
if (ee->handler) |
1230 |
out: |
task->ccs_flags |= CCS_TASK_IS_EXECUTE_HANDLER; |
1231 |
ccs_free_execve_entry(ee); |
/* Mark the current process as normal process. */ |
1232 |
|
else |
1233 |
|
task->ccs_flags &= ~CCS_TASK_IS_EXECUTE_HANDLER; |
1234 |
|
} |
1235 |
|
/* Tell GC that I finished execve(). */ |
1236 |
|
task->ccs_flags &= ~CCS_TASK_IS_IN_EXECVE; |
1237 |
|
ccs_read_unlock(ee->reader_idx); |
1238 |
|
kfree(ee->handler_path); |
1239 |
|
kfree(ee->tmp); |
1240 |
|
kfree(ee->dump.data); |
1241 |
|
kfree(ee); |
1242 |
} |
} |
1243 |
|
|
|
#else |
|
|
|
|
1244 |
/** |
/** |
1245 |
* ccs_start_execve - Prepare for execve() operation. |
* ccs_may_transit - Check permission and do domain transition without execve(). |
1246 |
* |
* |
1247 |
* @bprm: Pointer to "struct linux_binprm". |
* @domainname: Domainname to transit to. |
1248 |
|
* @pathname: Pathname to check. |
1249 |
* |
* |
1250 |
* Returns 0. |
* Returns 0 on success, negative value otherwise. |
1251 |
|
* |
1252 |
|
* Caller holds ccs_read_lock(). |
1253 |
*/ |
*/ |
1254 |
int ccs_start_execve(struct linux_binprm *bprm) |
int ccs_may_transit(const char *domainname, const char *pathname) |
1255 |
{ |
{ |
1256 |
#ifdef CONFIG_SAKURA |
struct ccs_path_info name; |
1257 |
/* Clear manager flag. */ |
struct ccs_request_info r; |
1258 |
current->ccs_flags &= ~CCS_TASK_IS_POLICY_MANAGER; |
struct ccs_domain_info *domain; |
1259 |
if (!ccs_policy_loaded) |
int error; |
1260 |
ccs_load_policy(bprm->filename); |
bool domain_created = false; |
1261 |
#endif |
name.name = pathname; |
1262 |
return 0; |
ccs_fill_path_info(&name); |
1263 |
|
/* Check allow_transit permission. */ |
1264 |
|
ccs_init_request_info(&r, CCS_MAC_FILE_TRANSIT); |
1265 |
|
error = ccs_path_permission(&r, CCS_TYPE_TRANSIT, &name); |
1266 |
|
if (error) |
1267 |
|
return error; |
1268 |
|
/* Check destination domain. */ |
1269 |
|
domain = ccs_find_domain(domainname); |
1270 |
|
if (!domain && r.mode != CCS_CONFIG_ENFORCING && |
1271 |
|
strlen(domainname) < CCS_EXEC_TMPSIZE - 10) { |
1272 |
|
domain = ccs_assign_domain(domainname, r.profile); |
1273 |
|
if (domain) |
1274 |
|
domain_created = true; |
1275 |
|
} |
1276 |
|
if (domain) { |
1277 |
|
error = 0; |
1278 |
|
current->ccs_domain_info = domain; |
1279 |
|
if (domain_created) |
1280 |
|
ccs_audit_domain_creation_log(); |
1281 |
|
} else { |
1282 |
|
error = -ENOENT; |
1283 |
|
} |
1284 |
|
return error; |
1285 |
} |
} |
1286 |
|
|
1287 |
/** |
static int __ccs_search_binary_handler(struct linux_binprm *bprm, |
1288 |
* ccs_finish_execve - Clean up execve() operation. |
struct pt_regs *regs) |
|
*/ |
|
|
void ccs_finish_execve(int retval) |
|
1289 |
{ |
{ |
1290 |
|
struct ccs_execve *ee; |
1291 |
|
int retval; |
1292 |
|
if (!ccs_policy_loaded) |
1293 |
|
ccsecurity_exports.load_policy(bprm->filename); |
1294 |
|
retval = ccs_start_execve(bprm, &ee); |
1295 |
|
if (!retval) |
1296 |
|
retval = search_binary_handler(bprm, regs); |
1297 |
|
ccs_finish_execve(retval, ee); |
1298 |
|
return retval; |
1299 |
} |
} |
1300 |
|
|
1301 |
#endif |
void __init ccs_domain_init(void) |
1302 |
|
{ |
1303 |
|
ccsecurity_ops.search_binary_handler = __ccs_search_binary_handler; |
1304 |
|
} |