| 1 |
/* |
| 2 |
* security/ccsecurity/policy_io.c |
| 3 |
* |
| 4 |
* Copyright (C) 2005-2009 NTT DATA CORPORATION |
| 5 |
* |
| 6 |
* Version: 1.7.0-pre 2009/08/24 |
| 7 |
* |
| 8 |
* This file is applicable to both 2.4.30 and 2.6.11 and later. |
| 9 |
* See README.ccs for ChangeLog. |
| 10 |
* |
| 11 |
*/ |
| 12 |
|
| 13 |
#include "internal.h" |
| 14 |
|
| 15 |
static struct ccs_profile ccs_default_profile = { |
| 16 |
.learning = &ccs_default_profile.preference, |
| 17 |
.permissive = &ccs_default_profile.preference, |
| 18 |
.enforcing = &ccs_default_profile.preference, |
| 19 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 20 |
.audit = &ccs_default_profile.preference, |
| 21 |
.preference.audit_max_grant_log = CONFIG_CCSECURITY_MAX_GRANT_LOG, |
| 22 |
.preference.audit_max_reject_log = CONFIG_CCSECURITY_MAX_REJECT_LOG, |
| 23 |
#endif |
| 24 |
.preference.enforcing_penalty = 0, |
| 25 |
.preference.enforcing_verbose = true, |
| 26 |
.preference.learning_max_entry = CONFIG_CCSECURITY_MAX_ACCEPT_ENTRY, |
| 27 |
.preference.learning_verbose = false, |
| 28 |
.preference.learning_exec_realpath = true, |
| 29 |
.preference.learning_exec_argv0 = true, |
| 30 |
.preference.learning_symlink_target = true, |
| 31 |
.preference.permissive_verbose = true |
| 32 |
}; |
| 33 |
|
| 34 |
/* Profile table. Memory is allocated as needed. */ |
| 35 |
static struct ccs_profile *ccs_profile_ptr[CCS_MAX_PROFILES]; |
| 36 |
|
| 37 |
/* Lock for protecting "struct ccs_profile"->comment */ |
| 38 |
static DEFINE_SPINLOCK(ccs_profile_comment_lock); |
| 39 |
|
| 40 |
/* String table for functionality that takes 4 modes. */ |
| 41 |
static const char *ccs_mode_4[4] = { |
| 42 |
"disabled", "learning", "permissive", "enforcing" |
| 43 |
}; |
| 44 |
|
| 45 |
/* String table for /proc/ccs/profile */ |
| 46 |
static const char *ccs_mac_keywords[CCS_MAX_MAC_INDEX + |
| 47 |
CCS_MAX_CAPABILITY_INDEX + |
| 48 |
CCS_MAX_MAC_CATEGORY_INDEX] = { |
| 49 |
[CCS_MAC_FILE_EXECUTE] |
| 50 |
= "file::execute", |
| 51 |
[CCS_MAC_FILE_OPEN] |
| 52 |
= "file::open", |
| 53 |
[CCS_MAC_FILE_CREATE] |
| 54 |
= "file::create", |
| 55 |
[CCS_MAC_FILE_UNLINK] |
| 56 |
= "file::unlink", |
| 57 |
[CCS_MAC_FILE_MKDIR] |
| 58 |
= "file::mkdir", |
| 59 |
[CCS_MAC_FILE_RMDIR] |
| 60 |
= "file::rmdir", |
| 61 |
[CCS_MAC_FILE_MKFIFO] |
| 62 |
= "file::mkfifo", |
| 63 |
[CCS_MAC_FILE_MKSOCK] |
| 64 |
= "file::mksock", |
| 65 |
[CCS_MAC_FILE_TRUNCATE] |
| 66 |
= "file::truncate", |
| 67 |
[CCS_MAC_FILE_SYMLINK] |
| 68 |
= "file::symlink", |
| 69 |
[CCS_MAC_FILE_REWRITE] |
| 70 |
= "file::rewrite", |
| 71 |
[CCS_MAC_FILE_MKBLOCK] |
| 72 |
= "file::mkblock", |
| 73 |
[CCS_MAC_FILE_MKCHAR] |
| 74 |
= "file::mkchar", |
| 75 |
[CCS_MAC_FILE_LINK] |
| 76 |
= "file::link", |
| 77 |
[CCS_MAC_FILE_RENAME] |
| 78 |
= "file::rename", |
| 79 |
[CCS_MAC_FILE_CHMOD] |
| 80 |
= "file::chmod", |
| 81 |
[CCS_MAC_FILE_CHOWN] |
| 82 |
= "file::chown", |
| 83 |
[CCS_MAC_FILE_CHGRP] |
| 84 |
= "file::chgrp", |
| 85 |
[CCS_MAC_FILE_IOCTL] |
| 86 |
= "file::ioctl", |
| 87 |
[CCS_MAC_FILE_CHROOT] |
| 88 |
= "file::chroot", |
| 89 |
[CCS_MAC_FILE_MOUNT] |
| 90 |
= "file::mount", |
| 91 |
[CCS_MAC_FILE_UMOUNT] |
| 92 |
= "file::umount", |
| 93 |
[CCS_MAC_FILE_PIVOT_ROOT] |
| 94 |
= "file::pivot_root", |
| 95 |
[CCS_MAC_ENVIRON] |
| 96 |
= "misc::env", |
| 97 |
[CCS_MAC_NETWORK_UDP_BIND] |
| 98 |
= "network::inet_udp_bind", |
| 99 |
[CCS_MAC_NETWORK_UDP_CONNECT] |
| 100 |
= "network::inet_udp_connect", |
| 101 |
[CCS_MAC_NETWORK_TCP_BIND] |
| 102 |
= "network::inet_tcp_bind", |
| 103 |
[CCS_MAC_NETWORK_TCP_LISTEN] |
| 104 |
= "network::inet_tcp_listen", |
| 105 |
[CCS_MAC_NETWORK_TCP_CONNECT] |
| 106 |
= "network::inet_tcp_connect", |
| 107 |
[CCS_MAC_NETWORK_TCP_ACCEPT] |
| 108 |
= "network::inet_tcp_accept", |
| 109 |
[CCS_MAC_NETWORK_RAW_BIND] |
| 110 |
= "network::inet_raw_bind", |
| 111 |
[CCS_MAC_NETWORK_RAW_CONNECT] |
| 112 |
= "network::inet_raw_connect", |
| 113 |
[CCS_MAC_SIGNAL] |
| 114 |
= "ipc::signal", |
| 115 |
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CREATE] |
| 116 |
= "capability::inet_tcp_create", |
| 117 |
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_LISTEN] |
| 118 |
= "capability::inet_tcp_listen", |
| 119 |
[CCS_MAX_MAC_INDEX + CCS_INET_STREAM_SOCKET_CONNECT] |
| 120 |
= "capability::inet_tcp_connect", |
| 121 |
[CCS_MAX_MAC_INDEX + CCS_USE_INET_DGRAM_SOCKET] |
| 122 |
= "capability::use_inet_udp", |
| 123 |
[CCS_MAX_MAC_INDEX + CCS_USE_INET_RAW_SOCKET] |
| 124 |
= "capability::use_inet_ip", |
| 125 |
[CCS_MAX_MAC_INDEX + CCS_USE_ROUTE_SOCKET] |
| 126 |
= "capability::use_route", |
| 127 |
[CCS_MAX_MAC_INDEX + CCS_USE_PACKET_SOCKET] |
| 128 |
= "capability::use_packet", |
| 129 |
[CCS_MAX_MAC_INDEX + CCS_SYS_MOUNT] |
| 130 |
= "capability::SYS_MOUNT", |
| 131 |
[CCS_MAX_MAC_INDEX + CCS_SYS_UMOUNT] |
| 132 |
= "capability::SYS_UMOUNT", |
| 133 |
[CCS_MAX_MAC_INDEX + CCS_SYS_REBOOT] |
| 134 |
= "capability::SYS_REBOOT", |
| 135 |
[CCS_MAX_MAC_INDEX + CCS_SYS_CHROOT] |
| 136 |
= "capability::SYS_CHROOT", |
| 137 |
[CCS_MAX_MAC_INDEX + CCS_SYS_KILL] |
| 138 |
= "capability::SYS_KILL", |
| 139 |
[CCS_MAX_MAC_INDEX + CCS_SYS_VHANGUP] |
| 140 |
= "capability::SYS_VHANGUP", |
| 141 |
[CCS_MAX_MAC_INDEX + CCS_SYS_SETTIME] |
| 142 |
= "capability::SYS_TIME", |
| 143 |
[CCS_MAX_MAC_INDEX + CCS_SYS_NICE] |
| 144 |
= "capability::SYS_NICE", |
| 145 |
[CCS_MAX_MAC_INDEX + CCS_SYS_SETHOSTNAME] |
| 146 |
= "capability::SYS_SETHOSTNAME", |
| 147 |
[CCS_MAX_MAC_INDEX + CCS_USE_KERNEL_MODULE] |
| 148 |
= "capability::use_kernel_module", |
| 149 |
[CCS_MAX_MAC_INDEX + CCS_CREATE_FIFO] |
| 150 |
= "capability::create_fifo", |
| 151 |
[CCS_MAX_MAC_INDEX + CCS_CREATE_BLOCK_DEV] |
| 152 |
= "capability::create_block_dev", |
| 153 |
[CCS_MAX_MAC_INDEX + CCS_CREATE_CHAR_DEV] |
| 154 |
= "capability::create_char_dev", |
| 155 |
[CCS_MAX_MAC_INDEX + CCS_CREATE_UNIX_SOCKET] |
| 156 |
= "capability::create_unix_socket", |
| 157 |
[CCS_MAX_MAC_INDEX + CCS_SYS_LINK] |
| 158 |
= "capability::SYS_LINK", |
| 159 |
[CCS_MAX_MAC_INDEX + CCS_SYS_SYMLINK] |
| 160 |
= "capability::SYS_SYMLINK", |
| 161 |
[CCS_MAX_MAC_INDEX + CCS_SYS_RENAME] |
| 162 |
= "capability::SYS_RENAME", |
| 163 |
[CCS_MAX_MAC_INDEX + CCS_SYS_UNLINK] |
| 164 |
= "capability::SYS_UNLINK", |
| 165 |
[CCS_MAX_MAC_INDEX + CCS_SYS_CHMOD] |
| 166 |
= "capability::SYS_CHMOD", |
| 167 |
[CCS_MAX_MAC_INDEX + CCS_SYS_CHOWN] |
| 168 |
= "capability::SYS_CHOWN", |
| 169 |
[CCS_MAX_MAC_INDEX + CCS_SYS_IOCTL] |
| 170 |
= "capability::SYS_IOCTL", |
| 171 |
[CCS_MAX_MAC_INDEX + CCS_SYS_KEXEC_LOAD] |
| 172 |
= "capability::SYS_KEXEC_LOAD", |
| 173 |
[CCS_MAX_MAC_INDEX + CCS_SYS_PIVOT_ROOT] |
| 174 |
= "capability::SYS_PIVOT_ROOT", |
| 175 |
[CCS_MAX_MAC_INDEX + CCS_SYS_PTRACE] |
| 176 |
= "capability::SYS_PTRACE", |
| 177 |
[CCS_MAX_MAC_INDEX + CCS_CONCEAL_MOUNT] |
| 178 |
= "capability::conceal_mount", |
| 179 |
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 180 |
+ CCS_MAC_CATEGORY_FILE] = "file", |
| 181 |
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 182 |
+ CCS_MAC_CATEGORY_NETWORK] = "network", |
| 183 |
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 184 |
+ CCS_MAC_CATEGORY_MISC] = "misc", |
| 185 |
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 186 |
+ CCS_MAC_CATEGORY_IPC] = "ipc", |
| 187 |
[CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 188 |
+ CCS_MAC_CATEGORY_CAPABILITY] = "capability", |
| 189 |
}; |
| 190 |
|
| 191 |
/* Permit policy management by non-root user? */ |
| 192 |
static bool ccs_manage_by_non_root; |
| 193 |
|
| 194 |
/** |
| 195 |
* ccs_cap2keyword - Convert capability operation to capability name. |
| 196 |
* |
| 197 |
* @operation: The capability index. |
| 198 |
* |
| 199 |
* Returns the name of the specified capability's name. |
| 200 |
*/ |
| 201 |
const char *ccs_cap2keyword(const u8 operation) |
| 202 |
{ |
| 203 |
return operation < CCS_MAX_CAPABILITY_INDEX |
| 204 |
? ccs_mac_keywords[CCS_MAX_MAC_INDEX + operation] + 12 : NULL; |
| 205 |
} |
| 206 |
|
| 207 |
/** |
| 208 |
* ccs_yesno - Return "yes" or "no". |
| 209 |
* |
| 210 |
* @value: Bool value. |
| 211 |
*/ |
| 212 |
static const char *ccs_yesno(const unsigned int value) |
| 213 |
{ |
| 214 |
return value ? "yes" : "no"; |
| 215 |
} |
| 216 |
|
| 217 |
/** |
| 218 |
* ccs_io_printf - Transactional printf() to "struct ccs_io_buffer" structure. |
| 219 |
* |
| 220 |
* @head: Pointer to "struct ccs_io_buffer". |
| 221 |
* @fmt: The printf()'s format string, followed by parameters. |
| 222 |
* |
| 223 |
* Returns true on success, false otherwise. |
| 224 |
* |
| 225 |
* The snprintf() will truncate, but ccs_io_printf() won't. |
| 226 |
*/ |
| 227 |
bool ccs_io_printf(struct ccs_io_buffer *head, const char *fmt, ...) |
| 228 |
{ |
| 229 |
va_list args; |
| 230 |
int len; |
| 231 |
int pos = head->read_avail; |
| 232 |
int size = head->readbuf_size - pos; |
| 233 |
if (size <= 0) |
| 234 |
return false; |
| 235 |
va_start(args, fmt); |
| 236 |
len = vsnprintf(head->read_buf + pos, size, fmt, args); |
| 237 |
va_end(args); |
| 238 |
if (pos + len >= head->readbuf_size) |
| 239 |
return false; |
| 240 |
head->read_avail += len; |
| 241 |
return true; |
| 242 |
} |
| 243 |
|
| 244 |
/** |
| 245 |
* ccs_find_or_assign_new_profile - Create a new profile. |
| 246 |
* |
| 247 |
* @profile: Profile number to create. |
| 248 |
* |
| 249 |
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
| 250 |
*/ |
| 251 |
static struct ccs_profile *ccs_find_or_assign_new_profile(const unsigned int |
| 252 |
profile) |
| 253 |
{ |
| 254 |
struct ccs_profile *ptr; |
| 255 |
struct ccs_profile *entry; |
| 256 |
if (profile >= CCS_MAX_PROFILES) |
| 257 |
return NULL; |
| 258 |
ptr = ccs_profile_ptr[profile]; |
| 259 |
if (ptr) |
| 260 |
return ptr; |
| 261 |
entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| 262 |
mutex_lock(&ccs_policy_lock); |
| 263 |
ptr = ccs_profile_ptr[profile]; |
| 264 |
if (!ptr && ccs_memory_ok(entry, sizeof(*entry))) { |
| 265 |
ptr = entry; |
| 266 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 267 |
ptr->audit = &ccs_default_profile.preference; |
| 268 |
#endif |
| 269 |
ptr->learning = &ccs_default_profile.preference; |
| 270 |
ptr->permissive = &ccs_default_profile.preference; |
| 271 |
ptr->enforcing = &ccs_default_profile.preference; |
| 272 |
ptr->default_config = CCS_CONFIG_DISABLED | |
| 273 |
CCS_CONFIG_WANT_GRANT_LOG | CCS_CONFIG_WANT_REJECT_LOG; |
| 274 |
memset(ptr->config, CCS_CONFIG_USE_DEFAULT, |
| 275 |
sizeof(ptr->config)); |
| 276 |
mb(); /* Avoid out-of-order execution. */ |
| 277 |
ccs_profile_ptr[profile] = ptr; |
| 278 |
entry = NULL; |
| 279 |
} |
| 280 |
mutex_unlock(&ccs_policy_lock); |
| 281 |
kfree(entry); |
| 282 |
return ptr; |
| 283 |
} |
| 284 |
|
| 285 |
/** |
| 286 |
* ccs_profile - Find a profile. |
| 287 |
* |
| 288 |
* @profile: Profile number to find. |
| 289 |
* |
| 290 |
* Returns pointer to "struct ccs_profile" on success, NULL otherwise. |
| 291 |
*/ |
| 292 |
struct ccs_profile *ccs_profile(const u8 profile) |
| 293 |
{ |
| 294 |
if (!ccs_policy_loaded) |
| 295 |
return &ccs_default_profile; |
| 296 |
return ccs_profile_ptr[profile]; |
| 297 |
} |
| 298 |
|
| 299 |
/** |
| 300 |
* ccs_write_profile - Write profile table. |
| 301 |
* |
| 302 |
* @head: Pointer to "struct ccs_io_buffer". |
| 303 |
* |
| 304 |
* Returns 0 on success, negative value otherwise. |
| 305 |
*/ |
| 306 |
static int ccs_write_profile(struct ccs_io_buffer *head) |
| 307 |
{ |
| 308 |
char *data = head->write_buf; |
| 309 |
unsigned int i; |
| 310 |
int value; |
| 311 |
int mode; |
| 312 |
u8 config; |
| 313 |
bool use_default = false; |
| 314 |
char *cp; |
| 315 |
struct ccs_profile *profile; |
| 316 |
i = simple_strtoul(data, &cp, 10); |
| 317 |
if (data == cp) { |
| 318 |
profile = &ccs_default_profile; |
| 319 |
} else { |
| 320 |
if (*cp != '-') |
| 321 |
return -EINVAL; |
| 322 |
data = cp + 1; |
| 323 |
profile = ccs_find_or_assign_new_profile(i); |
| 324 |
if (!profile) |
| 325 |
return -EINVAL; |
| 326 |
} |
| 327 |
cp = strchr(data, '='); |
| 328 |
if (!cp) |
| 329 |
return -EINVAL; |
| 330 |
*cp++ = '\0'; |
| 331 |
if (profile != &ccs_default_profile) |
| 332 |
use_default = strstr(cp, "use_default") != NULL; |
| 333 |
if (strstr(cp, "verbose=yes")) |
| 334 |
value = 1; |
| 335 |
else if (strstr(cp, "verbose=no")) |
| 336 |
value = 0; |
| 337 |
else |
| 338 |
value = -1; |
| 339 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 340 |
if (!strcmp(data, "PREFERENCE::audit")) { |
| 341 |
char *cp2; |
| 342 |
if (use_default) { |
| 343 |
profile->audit = &ccs_default_profile.preference; |
| 344 |
return 0; |
| 345 |
} |
| 346 |
profile->audit = &profile->preference; |
| 347 |
cp2 = strstr(cp, "max_grant_log="); |
| 348 |
if (cp2) |
| 349 |
sscanf(cp2 + 14, "%u", |
| 350 |
&profile->preference.audit_max_grant_log); |
| 351 |
cp2 = strstr(cp, "max_reject_log="); |
| 352 |
if (cp2) |
| 353 |
sscanf(cp2 + 15, "%u", |
| 354 |
&profile->preference.audit_max_reject_log); |
| 355 |
return 0; |
| 356 |
} |
| 357 |
#endif |
| 358 |
if (!strcmp(data, "PREFERENCE::enforcing")) { |
| 359 |
char *cp2; |
| 360 |
if (use_default) { |
| 361 |
profile->enforcing = &ccs_default_profile.preference; |
| 362 |
return 0; |
| 363 |
} |
| 364 |
profile->enforcing = &profile->preference; |
| 365 |
if (value >= 0) |
| 366 |
profile->preference.enforcing_verbose = value; |
| 367 |
cp2 = strstr(cp, "penalty="); |
| 368 |
if (cp2) |
| 369 |
sscanf(cp2 + 8, "%u", |
| 370 |
&profile->preference.enforcing_penalty); |
| 371 |
return 0; |
| 372 |
} |
| 373 |
if (!strcmp(data, "PREFERENCE::permissive")) { |
| 374 |
if (use_default) { |
| 375 |
profile->permissive = &ccs_default_profile.preference; |
| 376 |
return 0; |
| 377 |
} |
| 378 |
profile->permissive = &profile->preference; |
| 379 |
if (value >= 0) |
| 380 |
profile->preference.permissive_verbose = value; |
| 381 |
return 0; |
| 382 |
} |
| 383 |
if (!strcmp(data, "PREFERENCE::learning")) { |
| 384 |
char *cp2; |
| 385 |
if (use_default) { |
| 386 |
profile->learning = &ccs_default_profile.preference; |
| 387 |
return 0; |
| 388 |
} |
| 389 |
profile->learning = &profile->preference; |
| 390 |
if (value >= 0) |
| 391 |
profile->preference.learning_verbose = value; |
| 392 |
cp2 = strstr(cp, "max_entry="); |
| 393 |
if (cp2) |
| 394 |
sscanf(cp2 + 10, "%u", |
| 395 |
&profile->preference.learning_max_entry); |
| 396 |
if (strstr(cp, "exec.realpath=yes")) |
| 397 |
profile->preference.learning_exec_realpath = true; |
| 398 |
else if (strstr(cp, "exec.realpath=no")) |
| 399 |
profile->preference.learning_exec_realpath = false; |
| 400 |
if (strstr(cp, "exec.argv0=yes")) |
| 401 |
profile->preference.learning_exec_argv0 = true; |
| 402 |
else if (strstr(cp, "exec.argv0=no")) |
| 403 |
profile->preference.learning_exec_argv0 = false; |
| 404 |
if (strstr(cp, "symlink.target=yes")) |
| 405 |
profile->preference.learning_symlink_target = true; |
| 406 |
else if (strstr(cp, "symlink.target=no")) |
| 407 |
profile->preference.learning_symlink_target = false; |
| 408 |
return 0; |
| 409 |
} |
| 410 |
if (profile == &ccs_default_profile) |
| 411 |
return -EINVAL; |
| 412 |
if (!strcmp(data, "COMMENT")) { |
| 413 |
const struct ccs_path_info *new_comment = ccs_get_name(cp); |
| 414 |
const struct ccs_path_info *old_comment; |
| 415 |
/* Protect reader from ccs_put_name(). */ |
| 416 |
spin_lock(&ccs_profile_comment_lock); |
| 417 |
old_comment = profile->comment; |
| 418 |
profile->comment = new_comment; |
| 419 |
spin_unlock(&ccs_profile_comment_lock); |
| 420 |
ccs_put_name(old_comment); |
| 421 |
return 0; |
| 422 |
} |
| 423 |
if (!strcmp(data, "CONFIG")) { |
| 424 |
i = CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 425 |
+ CCS_MAX_MAC_CATEGORY_INDEX; |
| 426 |
config = profile->default_config; |
| 427 |
} else if (ccs_str_starts(&data, "CONFIG::")) { |
| 428 |
config = 0; |
| 429 |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 430 |
+ CCS_MAX_MAC_CATEGORY_INDEX; i++) { |
| 431 |
if (strcmp(data, ccs_mac_keywords[i])) |
| 432 |
continue; |
| 433 |
config = profile->config[i]; |
| 434 |
break; |
| 435 |
} |
| 436 |
if (i == CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 437 |
+ CCS_MAX_MAC_CATEGORY_INDEX) |
| 438 |
return -EINVAL; |
| 439 |
} else { |
| 440 |
return -EINVAL; |
| 441 |
} |
| 442 |
if (use_default) { |
| 443 |
config = CCS_CONFIG_USE_DEFAULT; |
| 444 |
} else { |
| 445 |
for (mode = 3; mode >= 0; mode--) |
| 446 |
if (strstr(cp, ccs_mode_4[mode])) |
| 447 |
/* |
| 448 |
* Update lower 3 bits in order to distinguish |
| 449 |
* 'config' from 'CCS_CONFIG_USE_DEAFULT'. |
| 450 |
*/ |
| 451 |
config = (config & ~7) | mode; |
| 452 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 453 |
if (config != CCS_CONFIG_USE_DEFAULT) { |
| 454 |
if (strstr(cp, "grant_log=yes")) |
| 455 |
config |= CCS_CONFIG_WANT_GRANT_LOG; |
| 456 |
else if (strstr(cp, "grant_log=no")) |
| 457 |
config &= ~CCS_CONFIG_WANT_GRANT_LOG; |
| 458 |
if (strstr(cp, "reject_log=yes")) |
| 459 |
config |= CCS_CONFIG_WANT_REJECT_LOG; |
| 460 |
else if (strstr(cp, "reject_log=no")) |
| 461 |
config &= ~CCS_CONFIG_WANT_REJECT_LOG; |
| 462 |
} |
| 463 |
#endif |
| 464 |
} |
| 465 |
if (i < CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 466 |
+ CCS_MAX_MAC_CATEGORY_INDEX) |
| 467 |
profile->config[i] = config; |
| 468 |
else if (config != CCS_CONFIG_USE_DEFAULT) |
| 469 |
profile->default_config = config; |
| 470 |
return 0; |
| 471 |
} |
| 472 |
|
| 473 |
/** |
| 474 |
* ccs_read_profile - Read profile table. |
| 475 |
* |
| 476 |
* @head: Pointer to "struct ccs_io_buffer". |
| 477 |
*/ |
| 478 |
static void ccs_read_profile(struct ccs_io_buffer *head) |
| 479 |
{ |
| 480 |
int index; |
| 481 |
if (head->read_eof) |
| 482 |
return; |
| 483 |
if (head->read_bit) |
| 484 |
goto body; |
| 485 |
ccs_io_printf(head, "PROFILE_VERSION=%s\n", "20090827"); |
| 486 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 487 |
ccs_io_printf(head, "PREFERENCE::audit={ max_grant_log=%u " |
| 488 |
"max_reject_log=%u }\n", |
| 489 |
ccs_default_profile.preference.audit_max_grant_log, |
| 490 |
ccs_default_profile.preference.audit_max_reject_log); |
| 491 |
#endif |
| 492 |
ccs_io_printf(head, "PREFERENCE::learning={ verbose=%s max_entry=%u " |
| 493 |
"exec.realpath=%s exec.argv0=%s symlink.target=%s }\n", |
| 494 |
ccs_yesno(ccs_default_profile.preference. |
| 495 |
learning_verbose), |
| 496 |
ccs_default_profile.preference.learning_max_entry, |
| 497 |
ccs_yesno(ccs_default_profile.preference. |
| 498 |
learning_exec_realpath), |
| 499 |
ccs_yesno(ccs_default_profile.preference. |
| 500 |
learning_exec_argv0), |
| 501 |
ccs_yesno(ccs_default_profile.preference. |
| 502 |
learning_symlink_target)); |
| 503 |
ccs_io_printf(head, "PREFERENCE::permissive={ verbose=%s }\n", |
| 504 |
ccs_yesno(ccs_default_profile.preference. |
| 505 |
permissive_verbose)); |
| 506 |
ccs_io_printf(head, "PREFERENCE::enforcing={ verbose=%s penalty=%u " |
| 507 |
"}\n", |
| 508 |
ccs_yesno(ccs_default_profile.preference. |
| 509 |
enforcing_verbose), |
| 510 |
ccs_default_profile.preference.enforcing_penalty); |
| 511 |
head->read_bit = 1; |
| 512 |
body: |
| 513 |
for (index = head->read_step; index < CCS_MAX_PROFILES; index++) { |
| 514 |
bool done; |
| 515 |
u8 config; |
| 516 |
int i; |
| 517 |
int pos; |
| 518 |
const struct ccs_profile *profile = ccs_profile_ptr[index]; |
| 519 |
head->read_step = index; |
| 520 |
if (!profile) |
| 521 |
continue; |
| 522 |
pos = head->read_avail; |
| 523 |
spin_lock(&ccs_profile_comment_lock); |
| 524 |
done = ccs_io_printf(head, "%u-COMMENT=%s\n", index, |
| 525 |
profile->comment ? profile->comment->name |
| 526 |
: ""); |
| 527 |
spin_unlock(&ccs_profile_comment_lock); |
| 528 |
if (!done) |
| 529 |
goto out; |
| 530 |
config = profile->default_config; |
| 531 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 532 |
if (!ccs_io_printf(head, "%u-CONFIG={ mode=%s grant_log=%s " |
| 533 |
"reject_log=%s }\n", index, |
| 534 |
ccs_mode_4[config & 3], |
| 535 |
ccs_yesno(config & |
| 536 |
CCS_CONFIG_WANT_GRANT_LOG), |
| 537 |
ccs_yesno(config & |
| 538 |
CCS_CONFIG_WANT_REJECT_LOG))) |
| 539 |
goto out; |
| 540 |
#else |
| 541 |
if (!ccs_io_printf(head, "%u-CONFIG={ mode=%s }\n", index, |
| 542 |
ccs_mode_4[config & 3])) |
| 543 |
goto out; |
| 544 |
#endif |
| 545 |
for (i = 0; i < CCS_MAX_MAC_INDEX + CCS_MAX_CAPABILITY_INDEX |
| 546 |
+ CCS_MAX_MAC_CATEGORY_INDEX; i++) { |
| 547 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 548 |
const char *g; |
| 549 |
const char *r; |
| 550 |
#endif |
| 551 |
config = profile->config[i]; |
| 552 |
if (config == CCS_CONFIG_USE_DEFAULT) |
| 553 |
continue; |
| 554 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 555 |
g = ccs_yesno(config & CCS_CONFIG_WANT_GRANT_LOG); |
| 556 |
r = ccs_yesno(config & CCS_CONFIG_WANT_REJECT_LOG); |
| 557 |
if (!ccs_io_printf(head, "%u-CONFIG::%s={ mode=%s " |
| 558 |
"grant_log=%s reject_log=%s }\n", |
| 559 |
index, ccs_mac_keywords[i], |
| 560 |
ccs_mode_4[config & 3], g, r)) |
| 561 |
goto out; |
| 562 |
#else |
| 563 |
if (!ccs_io_printf(head, "%u-CONFIG::%s={ mode=%s }\n", |
| 564 |
index, ccs_mac_keywords[i], |
| 565 |
ccs_mode_4[config & 3])) |
| 566 |
goto out; |
| 567 |
#endif |
| 568 |
} |
| 569 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 570 |
if (profile->audit != &ccs_default_profile.preference && |
| 571 |
!ccs_io_printf(head, "%u-PREFERENCE::audit={ " |
| 572 |
"max_grant_log=%u max_reject_log=%u }\n", |
| 573 |
index, |
| 574 |
profile->preference.audit_max_grant_log, |
| 575 |
profile->preference.audit_max_reject_log)) |
| 576 |
goto out; |
| 577 |
#endif |
| 578 |
if (profile->learning != &ccs_default_profile.preference && |
| 579 |
!ccs_io_printf(head, "%u-PREFERENCE::learning={ " |
| 580 |
"verbose=%s max_entry=%u exec.realpath=%s " |
| 581 |
"exec.argv0=%s symlink.target=%s }\n", |
| 582 |
index, |
| 583 |
ccs_yesno(profile->preference. |
| 584 |
learning_verbose), |
| 585 |
profile->preference.learning_max_entry, |
| 586 |
ccs_yesno(profile->preference. |
| 587 |
learning_exec_realpath), |
| 588 |
ccs_yesno(profile->preference. |
| 589 |
learning_exec_argv0), |
| 590 |
ccs_yesno(profile->preference. |
| 591 |
learning_symlink_target))) |
| 592 |
goto out; |
| 593 |
if (profile->permissive != &ccs_default_profile.preference && |
| 594 |
!ccs_io_printf(head, "%u-PREFERENCE::permissive={ " |
| 595 |
"verbose=%s }\n", index, |
| 596 |
ccs_yesno(profile->preference. |
| 597 |
permissive_verbose))) |
| 598 |
goto out; |
| 599 |
if (profile->enforcing != &ccs_default_profile.preference && |
| 600 |
!ccs_io_printf(head, "%u-PREFERENCE::enforcing={ " |
| 601 |
"verbose=%s penalty=%u }\n", index, |
| 602 |
ccs_yesno(profile->preference. |
| 603 |
enforcing_verbose), |
| 604 |
profile->preference.enforcing_penalty)) |
| 605 |
goto out; |
| 606 |
continue; |
| 607 |
out: |
| 608 |
head->read_avail = pos; |
| 609 |
break; |
| 610 |
} |
| 611 |
if (index == CCS_MAX_PROFILES) |
| 612 |
head->read_eof = true; |
| 613 |
} |
| 614 |
|
| 615 |
/* The list for "struct ccs_policy_manager_entry". */ |
| 616 |
LIST_HEAD(ccs_policy_manager_list); |
| 617 |
|
| 618 |
/** |
| 619 |
* ccs_update_manager_entry - Add a manager entry. |
| 620 |
* |
| 621 |
* @manager: The path to manager or the domainnamme. |
| 622 |
* @is_delete: True if it is a delete request. |
| 623 |
* |
| 624 |
* Returns 0 on success, negative value otherwise. |
| 625 |
*/ |
| 626 |
static int ccs_update_manager_entry(const char *manager, const bool is_delete) |
| 627 |
{ |
| 628 |
struct ccs_policy_manager_entry *entry = NULL; |
| 629 |
struct ccs_policy_manager_entry *ptr; |
| 630 |
struct ccs_policy_manager_entry e = { }; |
| 631 |
int error = is_delete ? -ENOENT : -ENOMEM; |
| 632 |
if (ccs_is_domain_def(manager)) { |
| 633 |
if (!ccs_is_correct_domain(manager)) |
| 634 |
return -EINVAL; |
| 635 |
e.is_domain = true; |
| 636 |
} else { |
| 637 |
if (!ccs_is_correct_path(manager, 1, -1, -1)) |
| 638 |
return -EINVAL; |
| 639 |
} |
| 640 |
e.manager = ccs_get_name(manager); |
| 641 |
if (!e.manager) |
| 642 |
return -ENOMEM; |
| 643 |
if (!is_delete) |
| 644 |
entry = kmalloc(sizeof(e), GFP_KERNEL); |
| 645 |
mutex_lock(&ccs_policy_lock); |
| 646 |
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
| 647 |
if (ptr->manager != e.manager) |
| 648 |
continue; |
| 649 |
ptr->is_deleted = is_delete; |
| 650 |
error = 0; |
| 651 |
break; |
| 652 |
} |
| 653 |
if (!is_delete && error && ccs_commit_ok(entry, &e, sizeof(e))) { |
| 654 |
list_add_tail_rcu(&entry->list, &ccs_policy_manager_list); |
| 655 |
entry = NULL; |
| 656 |
error = 0; |
| 657 |
} |
| 658 |
mutex_unlock(&ccs_policy_lock); |
| 659 |
ccs_put_name(e.manager); |
| 660 |
kfree(entry); |
| 661 |
return error; |
| 662 |
} |
| 663 |
|
| 664 |
/** |
| 665 |
* ccs_write_manager_policy - Write manager policy. |
| 666 |
* |
| 667 |
* @head: Pointer to "struct ccs_io_buffer". |
| 668 |
* |
| 669 |
* Returns 0 on success, negative value otherwise. |
| 670 |
*/ |
| 671 |
static int ccs_write_manager_policy(struct ccs_io_buffer *head) |
| 672 |
{ |
| 673 |
char *data = head->write_buf; |
| 674 |
bool is_delete = ccs_str_starts(&data, CCS_KEYWORD_DELETE); |
| 675 |
if (!strcmp(data, "manage_by_non_root")) { |
| 676 |
ccs_manage_by_non_root = !is_delete; |
| 677 |
return 0; |
| 678 |
} |
| 679 |
return ccs_update_manager_entry(data, is_delete); |
| 680 |
} |
| 681 |
|
| 682 |
/** |
| 683 |
* ccs_read_manager_policy - Read manager policy. |
| 684 |
* |
| 685 |
* @head: Pointer to "struct ccs_io_buffer". |
| 686 |
* |
| 687 |
* Caller holds ccs_read_lock(). |
| 688 |
*/ |
| 689 |
static void ccs_read_manager_policy(struct ccs_io_buffer *head) |
| 690 |
{ |
| 691 |
struct list_head *pos; |
| 692 |
if (head->read_eof) |
| 693 |
return; |
| 694 |
list_for_each_cookie(pos, head->read_var2, &ccs_policy_manager_list) { |
| 695 |
struct ccs_policy_manager_entry *ptr; |
| 696 |
ptr = list_entry(pos, struct ccs_policy_manager_entry, list); |
| 697 |
if (ptr->is_deleted) |
| 698 |
continue; |
| 699 |
if (!ccs_io_printf(head, "%s\n", ptr->manager->name)) |
| 700 |
return; |
| 701 |
} |
| 702 |
head->read_eof = true; |
| 703 |
} |
| 704 |
|
| 705 |
/** |
| 706 |
* ccs_is_policy_manager - Check whether the current process is a policy manager. |
| 707 |
* |
| 708 |
* Returns true if the current process is permitted to modify policy |
| 709 |
* via /proc/ccs/ interface. |
| 710 |
* |
| 711 |
* Caller holds ccs_read_lock(). |
| 712 |
*/ |
| 713 |
static bool ccs_is_policy_manager(void) |
| 714 |
{ |
| 715 |
struct ccs_policy_manager_entry *ptr; |
| 716 |
const char *exe; |
| 717 |
struct task_struct *task = current; |
| 718 |
const struct ccs_path_info *domainname |
| 719 |
= ccs_current_domain()->domainname; |
| 720 |
bool found = false; |
| 721 |
if (!ccs_policy_loaded) |
| 722 |
return true; |
| 723 |
if (task->ccs_flags & CCS_TASK_IS_POLICY_MANAGER) |
| 724 |
return true; |
| 725 |
if (!ccs_manage_by_non_root && (current_uid() || current_euid())) |
| 726 |
return false; |
| 727 |
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
| 728 |
if (!ptr->is_deleted && ptr->is_domain |
| 729 |
&& !ccs_pathcmp(domainname, ptr->manager)) { |
| 730 |
/* Set manager flag. */ |
| 731 |
task->ccs_flags |= CCS_TASK_IS_POLICY_MANAGER; |
| 732 |
return true; |
| 733 |
} |
| 734 |
} |
| 735 |
exe = ccs_get_exe(); |
| 736 |
if (!exe) |
| 737 |
return false; |
| 738 |
list_for_each_entry_rcu(ptr, &ccs_policy_manager_list, list) { |
| 739 |
if (!ptr->is_deleted && !ptr->is_domain |
| 740 |
&& !strcmp(exe, ptr->manager->name)) { |
| 741 |
found = true; |
| 742 |
/* Set manager flag. */ |
| 743 |
task->ccs_flags |= CCS_TASK_IS_POLICY_MANAGER; |
| 744 |
break; |
| 745 |
} |
| 746 |
} |
| 747 |
if (!found) { /* Reduce error messages. */ |
| 748 |
static pid_t ccs_last_pid; |
| 749 |
const pid_t pid = current->pid; |
| 750 |
if (ccs_last_pid != pid) { |
| 751 |
printk(KERN_WARNING "%s ( %s ) is not permitted to " |
| 752 |
"update policies.\n", domainname->name, exe); |
| 753 |
ccs_last_pid = pid; |
| 754 |
} |
| 755 |
} |
| 756 |
kfree(exe); |
| 757 |
return found; |
| 758 |
} |
| 759 |
|
| 760 |
/** |
| 761 |
* ccs_find_condition_part - Find condition part from the statement. |
| 762 |
* |
| 763 |
* @data: String to parse. |
| 764 |
* |
| 765 |
* Returns pointer to the condition part if it was found in the statement, |
| 766 |
* NULL otherwise. |
| 767 |
*/ |
| 768 |
static char *ccs_find_condition_part(char *data) |
| 769 |
{ |
| 770 |
char *cp = strstr(data, " if "); |
| 771 |
if (cp) { |
| 772 |
while (1) { |
| 773 |
char *cp2 = strstr(cp + 3, " if "); |
| 774 |
if (!cp2) |
| 775 |
break; |
| 776 |
cp = cp2; |
| 777 |
} |
| 778 |
*cp++ = '\0'; |
| 779 |
} else { |
| 780 |
cp = strstr(data, " ; set "); |
| 781 |
if (cp) |
| 782 |
*cp++ = '\0'; |
| 783 |
} |
| 784 |
return cp; |
| 785 |
} |
| 786 |
|
| 787 |
/** |
| 788 |
* ccs_is_select_one - Parse select command. |
| 789 |
* |
| 790 |
* @head: Pointer to "struct ccs_io_buffer". |
| 791 |
* @data: String to parse. |
| 792 |
* |
| 793 |
* Returns true on success, false otherwise. |
| 794 |
* |
| 795 |
* Caller holds ccs_read_lock(). |
| 796 |
*/ |
| 797 |
static bool ccs_is_select_one(struct ccs_io_buffer *head, const char *data) |
| 798 |
{ |
| 799 |
unsigned int pid; |
| 800 |
struct ccs_domain_info *domain = NULL; |
| 801 |
bool global_pid = false; |
| 802 |
if (!strcmp(data, "allow_execute")) { |
| 803 |
head->read_execute_only = true; |
| 804 |
return true; |
| 805 |
} |
| 806 |
if (sscanf(data, "pid=%u", &pid) == 1 || |
| 807 |
(global_pid = true, sscanf(data, "global-pid=%u", &pid) == 1)) { |
| 808 |
struct task_struct *p; |
| 809 |
read_lock(&tasklist_lock); |
| 810 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
| 811 |
if (global_pid) |
| 812 |
p = find_task_by_pid_ns(pid, &init_pid_ns); |
| 813 |
else |
| 814 |
p = find_task_by_vpid(pid); |
| 815 |
#else |
| 816 |
p = find_task_by_pid(pid); |
| 817 |
#endif |
| 818 |
if (p) |
| 819 |
domain = ccs_task_domain(p); |
| 820 |
read_unlock(&tasklist_lock); |
| 821 |
} else if (!strncmp(data, "domain=", 7)) { |
| 822 |
if (ccs_is_domain_def(data + 7)) |
| 823 |
domain = ccs_find_domain(data + 7); |
| 824 |
} else |
| 825 |
return false; |
| 826 |
head->write_var1 = domain; |
| 827 |
/* Accessing read_buf is safe because head->io_sem is held. */ |
| 828 |
if (!head->read_buf) |
| 829 |
return true; /* Do nothing if open(O_WRONLY). */ |
| 830 |
head->read_avail = 0; |
| 831 |
ccs_io_printf(head, "# select %s\n", data); |
| 832 |
head->read_single_domain = true; |
| 833 |
head->read_eof = !domain; |
| 834 |
if (domain) { |
| 835 |
struct ccs_domain_info *d; |
| 836 |
head->read_var1 = NULL; |
| 837 |
list_for_each_entry_rcu(d, &ccs_domain_list, list) { |
| 838 |
if (d == domain) |
| 839 |
break; |
| 840 |
head->read_var1 = &d->list; |
| 841 |
} |
| 842 |
head->read_var2 = NULL; |
| 843 |
head->read_bit = 0; |
| 844 |
head->read_step = 0; |
| 845 |
if (domain->is_deleted) |
| 846 |
ccs_io_printf(head, "# This is a deleted domain.\n"); |
| 847 |
} |
| 848 |
return true; |
| 849 |
} |
| 850 |
|
| 851 |
static int ccs_write_domain_policy2(char *data, struct ccs_domain_info *domain, |
| 852 |
struct ccs_condition *cond, |
| 853 |
const bool is_delete) |
| 854 |
{ |
| 855 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_CAPABILITY)) |
| 856 |
return ccs_write_capability_policy(data, domain, cond, |
| 857 |
is_delete); |
| 858 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_NETWORK)) |
| 859 |
return ccs_write_network_policy(data, domain, cond, is_delete); |
| 860 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_SIGNAL)) |
| 861 |
return ccs_write_signal_policy(data, domain, cond, is_delete); |
| 862 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_ENV)) |
| 863 |
return ccs_write_env_policy(data, domain, cond, is_delete); |
| 864 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_MOUNT)) |
| 865 |
return ccs_write_mount_policy(data, domain, cond, is_delete); |
| 866 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_UNMOUNT)) |
| 867 |
return ccs_write_umount_policy(data, domain, cond, is_delete); |
| 868 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_CHROOT)) |
| 869 |
return ccs_write_chroot_policy(data, domain, cond, is_delete); |
| 870 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_PIVOT_ROOT)) |
| 871 |
return ccs_write_pivot_root_policy(data, domain, cond, |
| 872 |
is_delete); |
| 873 |
return ccs_write_file_policy(data, domain, cond, is_delete); |
| 874 |
} |
| 875 |
|
| 876 |
/** |
| 877 |
* ccs_write_domain_policy - Write domain policy. |
| 878 |
* |
| 879 |
* @head: Pointer to "struct ccs_io_buffer". |
| 880 |
* |
| 881 |
* Returns 0 on success, negative value otherwise. |
| 882 |
*/ |
| 883 |
static int ccs_write_domain_policy(struct ccs_io_buffer *head) |
| 884 |
{ |
| 885 |
char *data = head->write_buf; |
| 886 |
struct ccs_domain_info *domain = head->write_var1; |
| 887 |
bool is_delete = false; |
| 888 |
bool is_select = false; |
| 889 |
unsigned int profile; |
| 890 |
struct ccs_condition *cond = NULL; |
| 891 |
char *cp; |
| 892 |
int error; |
| 893 |
if (ccs_str_starts(&data, CCS_KEYWORD_DELETE)) |
| 894 |
is_delete = true; |
| 895 |
else if (ccs_str_starts(&data, CCS_KEYWORD_SELECT)) |
| 896 |
is_select = true; |
| 897 |
if (is_select && ccs_is_select_one(head, data)) |
| 898 |
return 0; |
| 899 |
/* Don't allow updating policies by non manager programs. */ |
| 900 |
if (!ccs_is_policy_manager()) |
| 901 |
return -EPERM; |
| 902 |
if (ccs_is_domain_def(data)) { |
| 903 |
domain = NULL; |
| 904 |
if (is_delete) |
| 905 |
ccs_delete_domain(data); |
| 906 |
else if (is_select) |
| 907 |
domain = ccs_find_domain(data); |
| 908 |
else |
| 909 |
domain = ccs_find_or_assign_new_domain(data, 0); |
| 910 |
head->write_var1 = domain; |
| 911 |
return 0; |
| 912 |
} |
| 913 |
if (!domain) |
| 914 |
return -EINVAL; |
| 915 |
|
| 916 |
if (sscanf(data, CCS_KEYWORD_USE_PROFILE "%u", &profile) == 1 |
| 917 |
&& profile < CCS_MAX_PROFILES) { |
| 918 |
if (ccs_profile(profile)) |
| 919 |
domain->profile = (u8) profile; |
| 920 |
return 0; |
| 921 |
} |
| 922 |
if (!strcmp(data, CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) { |
| 923 |
domain->ignore_global_allow_read = !is_delete; |
| 924 |
return 0; |
| 925 |
} |
| 926 |
if (!strcmp(data, CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_ENV)) { |
| 927 |
domain->ignore_global_allow_env = !is_delete; |
| 928 |
return 0; |
| 929 |
} |
| 930 |
cp = ccs_find_condition_part(data); |
| 931 |
if (cp) { |
| 932 |
cond = ccs_get_condition(cp); |
| 933 |
if (!cond) |
| 934 |
return -EINVAL; |
| 935 |
} |
| 936 |
error = ccs_write_domain_policy2(data, domain, cond, is_delete); |
| 937 |
if (cond) |
| 938 |
ccs_put_condition(cond); |
| 939 |
return error; |
| 940 |
} |
| 941 |
|
| 942 |
/** |
| 943 |
* ccs_print_name_union - Print a ccs_name_union. |
| 944 |
* |
| 945 |
* @head: Pointer to "struct ccs_io_buffer". |
| 946 |
* @ptr: Pointer to "struct ccs_name_union". |
| 947 |
* |
| 948 |
* Returns true on success, false otherwise. |
| 949 |
*/ |
| 950 |
static bool ccs_print_name_union(struct ccs_io_buffer *head, |
| 951 |
const struct ccs_name_union *ptr) |
| 952 |
{ |
| 953 |
int pos = head->read_avail; |
| 954 |
if (pos && head->read_buf[pos - 1] == ' ') |
| 955 |
head->read_avail--; |
| 956 |
if (ptr->is_group) |
| 957 |
return ccs_io_printf(head, " @%s", |
| 958 |
ptr->group->group_name->name); |
| 959 |
return ccs_io_printf(head, " %s", ptr->filename->name); |
| 960 |
} |
| 961 |
|
| 962 |
/** |
| 963 |
* ccs_print_name_union_quoted - Print a ccs_name_union with double quotes. |
| 964 |
* |
| 965 |
* @head: Pointer to "struct ccs_io_buffer". |
| 966 |
* @ptr: Pointer to "struct ccs_name_union". |
| 967 |
* |
| 968 |
* Returns true on success, false otherwise. |
| 969 |
*/ |
| 970 |
static bool ccs_print_name_union_quoted(struct ccs_io_buffer *head, |
| 971 |
const struct ccs_name_union *ptr) |
| 972 |
{ |
| 973 |
if (ptr->is_group) |
| 974 |
return ccs_io_printf(head, "@%s", |
| 975 |
ptr->group->group_name->name); |
| 976 |
return ccs_io_printf(head, "\"%s\"", ptr->filename->name); |
| 977 |
} |
| 978 |
|
| 979 |
/** |
| 980 |
* ccs_print_number_union_common - Print a ccs_number_union. |
| 981 |
* |
| 982 |
* @head: Pointer to "struct ccs_io_buffer". |
| 983 |
* @ptr: Pointer to "struct ccs_number_union". |
| 984 |
* @need_space: True if a space character is needed. |
| 985 |
* |
| 986 |
* Returns true on success, false otherwise. |
| 987 |
*/ |
| 988 |
static bool ccs_print_number_union_common(struct ccs_io_buffer *head, |
| 989 |
const struct ccs_number_union *ptr, |
| 990 |
const bool need_space) |
| 991 |
{ |
| 992 |
unsigned long min; |
| 993 |
unsigned long max; |
| 994 |
u8 min_type; |
| 995 |
u8 max_type; |
| 996 |
if (need_space && !ccs_io_printf(head, " ")) |
| 997 |
return false; |
| 998 |
if (ptr->is_group) |
| 999 |
return ccs_io_printf(head, "@%s", |
| 1000 |
ptr->group->group_name->name); |
| 1001 |
min_type = ptr->min_type; |
| 1002 |
max_type = ptr->max_type; |
| 1003 |
min = ptr->values[0]; |
| 1004 |
max = ptr->values[1]; |
| 1005 |
switch (min_type) { |
| 1006 |
case CCS_VALUE_TYPE_HEXADECIMAL: |
| 1007 |
if (!ccs_io_printf(head, "0x%lX", min)) |
| 1008 |
return false; |
| 1009 |
break; |
| 1010 |
case CCS_VALUE_TYPE_OCTAL: |
| 1011 |
if (!ccs_io_printf(head, "0%lo", min)) |
| 1012 |
return false; |
| 1013 |
break; |
| 1014 |
default: |
| 1015 |
if (!ccs_io_printf(head, "%lu", min)) |
| 1016 |
return false; |
| 1017 |
break; |
| 1018 |
} |
| 1019 |
if (min == max && min_type == max_type) |
| 1020 |
return true; |
| 1021 |
switch (max_type) { |
| 1022 |
case CCS_VALUE_TYPE_HEXADECIMAL: |
| 1023 |
return ccs_io_printf(head, "-0x%lX", max); |
| 1024 |
case CCS_VALUE_TYPE_OCTAL: |
| 1025 |
return ccs_io_printf(head, "-0%lo", max); |
| 1026 |
default: |
| 1027 |
return ccs_io_printf(head, "-%lu", max); |
| 1028 |
} |
| 1029 |
} |
| 1030 |
|
| 1031 |
/** |
| 1032 |
* ccs_print_number_union - Print a ccs_number_union. |
| 1033 |
* |
| 1034 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1035 |
* @ptr: Pointer to "struct ccs_number_union". |
| 1036 |
* |
| 1037 |
* Returns true on success, false otherwise. |
| 1038 |
*/ |
| 1039 |
bool ccs_print_number_union(struct ccs_io_buffer *head, |
| 1040 |
const struct ccs_number_union *ptr) |
| 1041 |
{ |
| 1042 |
return ccs_print_number_union_common(head, ptr, true); |
| 1043 |
} |
| 1044 |
|
| 1045 |
/** |
| 1046 |
* ccs_print_number_union_nospace - Print a ccs_number_union without a space character. |
| 1047 |
* |
| 1048 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1049 |
* @ptr: Pointer to "struct ccs_number_union". |
| 1050 |
* |
| 1051 |
* Returns true on success, false otherwise. |
| 1052 |
*/ |
| 1053 |
static bool ccs_print_number_union_nospace(struct ccs_io_buffer *head, |
| 1054 |
const struct ccs_number_union *ptr) |
| 1055 |
{ |
| 1056 |
return ccs_print_number_union_common(head, ptr, false); |
| 1057 |
} |
| 1058 |
|
| 1059 |
/** |
| 1060 |
* ccs_print_condition - Print condition part. |
| 1061 |
* |
| 1062 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1063 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1064 |
* |
| 1065 |
* Returns true on success, false otherwise. |
| 1066 |
*/ |
| 1067 |
static bool ccs_print_condition(struct ccs_io_buffer *head, |
| 1068 |
const struct ccs_condition *cond) |
| 1069 |
{ |
| 1070 |
const struct ccs_condition_element *condp; |
| 1071 |
const struct ccs_number_union *numbers_p; |
| 1072 |
const struct ccs_name_union *names_p; |
| 1073 |
const struct ccs_argv_entry *argv; |
| 1074 |
const struct ccs_envp_entry *envp; |
| 1075 |
u16 condc; |
| 1076 |
u16 i; |
| 1077 |
u16 j; |
| 1078 |
char buffer[32]; |
| 1079 |
if (!cond) |
| 1080 |
goto no_condition; |
| 1081 |
condc = cond->condc; |
| 1082 |
condp = (const struct ccs_condition_element *) (cond + 1); |
| 1083 |
numbers_p = (const struct ccs_number_union *) (condp + condc); |
| 1084 |
names_p = (const struct ccs_name_union *) |
| 1085 |
(numbers_p + cond->numbers_count); |
| 1086 |
argv = (const struct ccs_argv_entry *) (names_p + cond->names_count); |
| 1087 |
envp = (const struct ccs_envp_entry *) (argv + cond->argc); |
| 1088 |
memset(buffer, 0, sizeof(buffer)); |
| 1089 |
if (condc && !ccs_io_printf(head, "%s", " if")) |
| 1090 |
goto out; |
| 1091 |
for (i = 0; i < condc; i++) { |
| 1092 |
const u8 match = condp->equals; |
| 1093 |
const u8 left = condp->left; |
| 1094 |
const u8 right = condp->right; |
| 1095 |
condp++; |
| 1096 |
switch (left) { |
| 1097 |
case CCS_ARGV_ENTRY: |
| 1098 |
if (!ccs_io_printf(head, " exec.argv[%u]%s\"%s\"", |
| 1099 |
argv->index, argv->is_not ? |
| 1100 |
"!=" : "=", argv->value->name)) |
| 1101 |
goto out; |
| 1102 |
argv++; |
| 1103 |
continue; |
| 1104 |
case CCS_ENVP_ENTRY: |
| 1105 |
if (!ccs_io_printf(head, " exec.envp[\"%s\"]%s", |
| 1106 |
envp->name->name, envp->is_not ? |
| 1107 |
"!=" : "=")) |
| 1108 |
goto out; |
| 1109 |
if (envp->value) { |
| 1110 |
if (!ccs_io_printf(head, "\"%s\"", |
| 1111 |
envp->value->name)) |
| 1112 |
goto out; |
| 1113 |
} else { |
| 1114 |
if (!ccs_io_printf(head, "NULL")) |
| 1115 |
goto out; |
| 1116 |
} |
| 1117 |
envp++; |
| 1118 |
continue; |
| 1119 |
case CCS_NUMBER_UNION: |
| 1120 |
if (!ccs_print_number_union(head, numbers_p++)) |
| 1121 |
goto out; |
| 1122 |
break; |
| 1123 |
default: |
| 1124 |
if (left >= CCS_MAX_CONDITION_KEYWORD) |
| 1125 |
goto out; |
| 1126 |
if (!ccs_io_printf(head, " %s", |
| 1127 |
ccs_condition_keyword[left])) |
| 1128 |
goto out; |
| 1129 |
break; |
| 1130 |
} |
| 1131 |
if (!ccs_io_printf(head, "%s", match ? "=" : "!=")) |
| 1132 |
goto out; |
| 1133 |
switch (right) { |
| 1134 |
case CCS_NAME_UNION: |
| 1135 |
if (!ccs_print_name_union_quoted(head, names_p++)) |
| 1136 |
goto out; |
| 1137 |
break; |
| 1138 |
case CCS_NUMBER_UNION: |
| 1139 |
if (!ccs_print_number_union_nospace(head, numbers_p++)) |
| 1140 |
goto out; |
| 1141 |
break; |
| 1142 |
default: |
| 1143 |
if (right >= CCS_MAX_CONDITION_KEYWORD) |
| 1144 |
goto out; |
| 1145 |
if (!ccs_io_printf(head, "%s", |
| 1146 |
ccs_condition_keyword[right])) |
| 1147 |
goto out; |
| 1148 |
break; |
| 1149 |
} |
| 1150 |
} |
| 1151 |
i = cond->post_state[3]; |
| 1152 |
if (!i) |
| 1153 |
goto no_condition; |
| 1154 |
if (!ccs_io_printf(head, " ; set")) |
| 1155 |
goto out; |
| 1156 |
for (j = 0; j < 3; j++) { |
| 1157 |
if (!(i & (1 << j))) |
| 1158 |
continue; |
| 1159 |
if (!ccs_io_printf(head, " task.state[%u]=%u", j, |
| 1160 |
cond->post_state[j])) |
| 1161 |
goto out; |
| 1162 |
} |
| 1163 |
no_condition: |
| 1164 |
if (ccs_io_printf(head, "\n")) |
| 1165 |
return true; |
| 1166 |
out: |
| 1167 |
return false; |
| 1168 |
} |
| 1169 |
|
| 1170 |
/** |
| 1171 |
* ccs_print_path_acl - Print a single path ACL entry. |
| 1172 |
* |
| 1173 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1174 |
* @ptr: Pointer to "struct ccs_path_acl". |
| 1175 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1176 |
* |
| 1177 |
* Returns true on success, false otherwise. |
| 1178 |
*/ |
| 1179 |
static bool ccs_print_path_acl(struct ccs_io_buffer *head, |
| 1180 |
struct ccs_path_acl *ptr, |
| 1181 |
const struct ccs_condition *cond) |
| 1182 |
{ |
| 1183 |
int pos; |
| 1184 |
u8 bit; |
| 1185 |
const u16 perm = ptr->perm; |
| 1186 |
for (bit = head->read_bit; bit < CCS_MAX_PATH_OPERATION; bit++) { |
| 1187 |
if (!(perm & (1 << bit))) |
| 1188 |
continue; |
| 1189 |
if (head->read_execute_only && bit != CCS_TYPE_EXECUTE) |
| 1190 |
continue; |
| 1191 |
/* Print "read/write" instead of "read" and "write". */ |
| 1192 |
if ((bit == CCS_TYPE_READ || bit == CCS_TYPE_WRITE) |
| 1193 |
&& (perm & (1 << CCS_TYPE_READ_WRITE))) |
| 1194 |
continue; |
| 1195 |
pos = head->read_avail; |
| 1196 |
if (!ccs_io_printf(head, "allow_%s", ccs_path2keyword(bit)) || |
| 1197 |
!ccs_print_name_union(head, &ptr->name) || |
| 1198 |
!ccs_print_condition(head, cond)) { |
| 1199 |
head->read_bit = bit; |
| 1200 |
head->read_avail = pos; |
| 1201 |
return false; |
| 1202 |
} |
| 1203 |
} |
| 1204 |
head->read_bit = 0; |
| 1205 |
return true; |
| 1206 |
} |
| 1207 |
|
| 1208 |
/** |
| 1209 |
* ccs_print_path_number3_acl - Print a path_number3 ACL entry. |
| 1210 |
* |
| 1211 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1212 |
* @ptr: Pointer to "struct ccs_path_number3_acl". |
| 1213 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1214 |
* |
| 1215 |
* Returns true on success, false otherwise. |
| 1216 |
*/ |
| 1217 |
static bool ccs_print_path_number3_acl(struct ccs_io_buffer *head, |
| 1218 |
struct ccs_path_number3_acl *ptr, |
| 1219 |
const struct ccs_condition *cond) |
| 1220 |
{ |
| 1221 |
int pos; |
| 1222 |
u8 bit; |
| 1223 |
const u16 perm = ptr->perm; |
| 1224 |
for (bit = head->read_bit; bit < CCS_MAX_PATH_NUMBER3_OPERATION; |
| 1225 |
bit++) { |
| 1226 |
if (!(perm & (1 << bit))) |
| 1227 |
continue; |
| 1228 |
pos = head->read_avail; |
| 1229 |
if (!ccs_io_printf(head, "allow_%s", |
| 1230 |
ccs_path_number32keyword(bit)) || |
| 1231 |
!ccs_print_name_union(head, &ptr->name) || |
| 1232 |
!ccs_print_number_union(head, &ptr->mode) || |
| 1233 |
!ccs_print_number_union(head, &ptr->major) || |
| 1234 |
!ccs_print_number_union(head, &ptr->minor) || |
| 1235 |
!ccs_print_condition(head, cond)) { |
| 1236 |
head->read_bit = bit; |
| 1237 |
head->read_avail = pos; |
| 1238 |
return false; |
| 1239 |
} |
| 1240 |
} |
| 1241 |
head->read_bit = 0; |
| 1242 |
return true; |
| 1243 |
} |
| 1244 |
|
| 1245 |
/** |
| 1246 |
* ccs_print_path2_acl - Print a path2 ACL entry. |
| 1247 |
* |
| 1248 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1249 |
* @ptr: Pointer to "struct ccs_path2_acl". |
| 1250 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1251 |
* |
| 1252 |
* Returns true on success, false otherwise. |
| 1253 |
*/ |
| 1254 |
static bool ccs_print_path2_acl(struct ccs_io_buffer *head, |
| 1255 |
struct ccs_path2_acl *ptr, |
| 1256 |
const struct ccs_condition *cond) |
| 1257 |
{ |
| 1258 |
int pos; |
| 1259 |
u8 bit; |
| 1260 |
const u8 perm = ptr->perm; |
| 1261 |
for (bit = head->read_bit; bit < CCS_MAX_PATH2_OPERATION; bit++) { |
| 1262 |
if (!(perm & (1 << bit))) |
| 1263 |
continue; |
| 1264 |
pos = head->read_avail; |
| 1265 |
if (!ccs_io_printf(head, "allow_%s", |
| 1266 |
ccs_path22keyword(bit)) || |
| 1267 |
!ccs_print_name_union(head, &ptr->name1) || |
| 1268 |
!ccs_print_name_union(head, &ptr->name2) || |
| 1269 |
!ccs_print_condition(head, cond)) { |
| 1270 |
head->read_bit = bit; |
| 1271 |
head->read_avail = pos; |
| 1272 |
return false; |
| 1273 |
} |
| 1274 |
} |
| 1275 |
head->read_bit = 0; |
| 1276 |
return true; |
| 1277 |
} |
| 1278 |
|
| 1279 |
/** |
| 1280 |
* ccs_print_path_number_acl - Print a path_number ACL entry. |
| 1281 |
* |
| 1282 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1283 |
* @ptr: Pointer to "struct ccs_path_number_acl". |
| 1284 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1285 |
* |
| 1286 |
* Returns true on success, false otherwise. |
| 1287 |
*/ |
| 1288 |
static bool ccs_print_path_number_acl(struct ccs_io_buffer *head, |
| 1289 |
struct ccs_path_number_acl *ptr, |
| 1290 |
const struct ccs_condition *cond) |
| 1291 |
{ |
| 1292 |
int pos; |
| 1293 |
u8 bit; |
| 1294 |
const u8 perm = ptr->perm; |
| 1295 |
for (bit = head->read_bit; bit < CCS_MAX_PATH_NUMBER_OPERATION; |
| 1296 |
bit++) { |
| 1297 |
if (!(perm & (1 << bit))) |
| 1298 |
continue; |
| 1299 |
pos = head->read_avail; |
| 1300 |
if (!ccs_io_printf(head, "allow_%s", |
| 1301 |
ccs_path_number2keyword(bit)) || |
| 1302 |
!ccs_print_name_union(head, &ptr->name) || |
| 1303 |
!ccs_print_number_union(head, &ptr->number) || |
| 1304 |
!ccs_print_condition(head, cond)) { |
| 1305 |
head->read_bit = bit; |
| 1306 |
head->read_avail = pos; |
| 1307 |
return false; |
| 1308 |
} |
| 1309 |
} |
| 1310 |
head->read_bit = 0; |
| 1311 |
return true; |
| 1312 |
} |
| 1313 |
|
| 1314 |
/** |
| 1315 |
* ccs_print_env_acl - Print an evironment variable name's ACL entry. |
| 1316 |
* |
| 1317 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1318 |
* @ptr: Pointer to "struct ccs_env_acl". |
| 1319 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1320 |
* |
| 1321 |
* Returns true on success, false otherwise. |
| 1322 |
*/ |
| 1323 |
static bool ccs_print_env_acl(struct ccs_io_buffer *head, |
| 1324 |
struct ccs_env_acl *ptr, |
| 1325 |
const struct ccs_condition *cond) |
| 1326 |
{ |
| 1327 |
const int pos = head->read_avail; |
| 1328 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_ENV "%s", ptr->env->name) || |
| 1329 |
!ccs_print_condition(head, cond)) { |
| 1330 |
head->read_avail = pos; |
| 1331 |
return false; |
| 1332 |
} |
| 1333 |
return true; |
| 1334 |
} |
| 1335 |
|
| 1336 |
/** |
| 1337 |
* ccs_print_capability_acl - Print a capability ACL entry. |
| 1338 |
* |
| 1339 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1340 |
* @ptr: Pointer to "struct ccs_capability_acl". |
| 1341 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1342 |
* |
| 1343 |
* Returns true on success, false otherwise. |
| 1344 |
*/ |
| 1345 |
static bool ccs_print_capability_acl(struct ccs_io_buffer *head, |
| 1346 |
struct ccs_capability_acl *ptr, |
| 1347 |
const struct ccs_condition *cond) |
| 1348 |
{ |
| 1349 |
const int pos = head->read_avail; |
| 1350 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_CAPABILITY "%s", |
| 1351 |
ccs_cap2keyword(ptr->operation)) || |
| 1352 |
!ccs_print_condition(head, cond)) { |
| 1353 |
head->read_avail = pos; |
| 1354 |
return false; |
| 1355 |
} |
| 1356 |
return true; |
| 1357 |
} |
| 1358 |
|
| 1359 |
/** |
| 1360 |
* ccs_print_ipv4_entry - Print IPv4 address of a network ACL entry. |
| 1361 |
* |
| 1362 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1363 |
* @ptr: Pointer to "struct ccs_ip_network_acl". |
| 1364 |
* |
| 1365 |
* Returns true on success, false otherwise. |
| 1366 |
*/ |
| 1367 |
static bool ccs_print_ipv4_entry(struct ccs_io_buffer *head, |
| 1368 |
struct ccs_ip_network_acl *ptr) |
| 1369 |
{ |
| 1370 |
const u32 min_address = ptr->address.ipv4.min; |
| 1371 |
const u32 max_address = ptr->address.ipv4.max; |
| 1372 |
if (!ccs_io_printf(head, "%u.%u.%u.%u", HIPQUAD(min_address))) |
| 1373 |
return false; |
| 1374 |
if (min_address != max_address |
| 1375 |
&& !ccs_io_printf(head, "-%u.%u.%u.%u", HIPQUAD(max_address))) |
| 1376 |
return false; |
| 1377 |
return true; |
| 1378 |
} |
| 1379 |
|
| 1380 |
/** |
| 1381 |
* ccs_print_ipv6_entry - Print IPv6 address of a network ACL entry. |
| 1382 |
* |
| 1383 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1384 |
* @ptr: Pointer to "struct ccs_ip_network_acl". |
| 1385 |
* |
| 1386 |
* Returns true on success, false otherwise. |
| 1387 |
*/ |
| 1388 |
static bool ccs_print_ipv6_entry(struct ccs_io_buffer *head, |
| 1389 |
struct ccs_ip_network_acl *ptr) |
| 1390 |
{ |
| 1391 |
char buf[64]; |
| 1392 |
const struct in6_addr *min_address = ptr->address.ipv6.min; |
| 1393 |
const struct in6_addr *max_address = ptr->address.ipv6.max; |
| 1394 |
ccs_print_ipv6(buf, sizeof(buf), min_address); |
| 1395 |
if (!ccs_io_printf(head, "%s", buf)) |
| 1396 |
return false; |
| 1397 |
if (min_address != max_address) { |
| 1398 |
ccs_print_ipv6(buf, sizeof(buf), max_address); |
| 1399 |
if (!ccs_io_printf(head, "-%s", buf)) |
| 1400 |
return false; |
| 1401 |
} |
| 1402 |
return true; |
| 1403 |
} |
| 1404 |
|
| 1405 |
/** |
| 1406 |
* ccs_print_network_acl - Print a network ACL entry. |
| 1407 |
* |
| 1408 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1409 |
* @ptr: Pointer to "struct ccs_ip_network_acl". |
| 1410 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1411 |
* |
| 1412 |
* Returns true on success, false otherwise. |
| 1413 |
*/ |
| 1414 |
static bool ccs_print_network_acl(struct ccs_io_buffer *head, |
| 1415 |
struct ccs_ip_network_acl *ptr, |
| 1416 |
const struct ccs_condition *cond) |
| 1417 |
{ |
| 1418 |
int pos; |
| 1419 |
u8 bit; |
| 1420 |
const u16 perm = ptr->perm; |
| 1421 |
for (bit = head->read_bit; bit < CCS_MAX_NETWORK_OPERATION; bit++) { |
| 1422 |
if (!(perm & (1 << bit))) |
| 1423 |
continue; |
| 1424 |
pos = head->read_avail; |
| 1425 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_NETWORK "%s ", |
| 1426 |
ccs_net2keyword(bit))) |
| 1427 |
goto out; |
| 1428 |
switch (ptr->address_type) { |
| 1429 |
case CCS_IP_ADDRESS_TYPE_ADDRESS_GROUP: |
| 1430 |
if (!ccs_io_printf(head, "@%s", ptr->address.group-> |
| 1431 |
group_name->name)) |
| 1432 |
goto out; |
| 1433 |
break; |
| 1434 |
case CCS_IP_ADDRESS_TYPE_IPv4: |
| 1435 |
if (!ccs_print_ipv4_entry(head, ptr)) |
| 1436 |
goto out; |
| 1437 |
break; |
| 1438 |
case CCS_IP_ADDRESS_TYPE_IPv6: |
| 1439 |
if (!ccs_print_ipv6_entry(head, ptr)) |
| 1440 |
goto out; |
| 1441 |
break; |
| 1442 |
} |
| 1443 |
if (!ccs_print_number_union(head, &ptr->port) || |
| 1444 |
!ccs_print_condition(head, cond)) |
| 1445 |
goto out; |
| 1446 |
} |
| 1447 |
head->read_bit = 0; |
| 1448 |
return true; |
| 1449 |
out: |
| 1450 |
head->read_bit = bit; |
| 1451 |
head->read_avail = pos; |
| 1452 |
return false; |
| 1453 |
} |
| 1454 |
|
| 1455 |
/** |
| 1456 |
* ccs_print_signal_acl - Print a signal ACL entry. |
| 1457 |
* |
| 1458 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1459 |
* @ptr: Pointer to "struct signale_acl". |
| 1460 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1461 |
* |
| 1462 |
* Returns true on success, false otherwise. |
| 1463 |
*/ |
| 1464 |
static bool ccs_print_signal_acl(struct ccs_io_buffer *head, |
| 1465 |
struct ccs_signal_acl *ptr, |
| 1466 |
const struct ccs_condition *cond) |
| 1467 |
{ |
| 1468 |
const int pos = head->read_avail; |
| 1469 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_SIGNAL "%u %s", |
| 1470 |
ptr->sig, ptr->domainname->name) || |
| 1471 |
!ccs_print_condition(head, cond)) { |
| 1472 |
head->read_avail = pos; |
| 1473 |
return false; |
| 1474 |
} |
| 1475 |
return true; |
| 1476 |
} |
| 1477 |
|
| 1478 |
/** |
| 1479 |
* ccs_print_execute_handler_record - Print an execute handler ACL entry. |
| 1480 |
* |
| 1481 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1482 |
* @keyword: Name of the keyword. |
| 1483 |
* @ptr: Pointer to "struct ccs_execute_handler_record". |
| 1484 |
* |
| 1485 |
* Returns true on success, false otherwise. |
| 1486 |
*/ |
| 1487 |
static bool ccs_print_execute_handler_record(struct ccs_io_buffer *head, |
| 1488 |
const char *keyword, |
| 1489 |
struct ccs_execute_handler_record * |
| 1490 |
ptr) |
| 1491 |
{ |
| 1492 |
return ccs_io_printf(head, "%s %s\n", keyword, ptr->handler->name); |
| 1493 |
} |
| 1494 |
|
| 1495 |
/** |
| 1496 |
* ccs_print_mount_acl - Print a mount ACL entry. |
| 1497 |
* |
| 1498 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1499 |
* @ptr: Pointer to "struct ccs_mount_acl". |
| 1500 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1501 |
* |
| 1502 |
* Returns true on success, false otherwise. |
| 1503 |
*/ |
| 1504 |
static bool ccs_print_mount_acl(struct ccs_io_buffer *head, |
| 1505 |
struct ccs_mount_acl *ptr, |
| 1506 |
const struct ccs_condition *cond) |
| 1507 |
{ |
| 1508 |
const int pos = head->read_avail; |
| 1509 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_MOUNT) || |
| 1510 |
!ccs_print_name_union(head, &ptr->dev_name) || |
| 1511 |
!ccs_print_name_union(head, &ptr->dir_name) || |
| 1512 |
!ccs_print_name_union(head, &ptr->fs_type) || |
| 1513 |
!ccs_print_number_union(head, &ptr->flags) || |
| 1514 |
!ccs_print_condition(head, cond)) { |
| 1515 |
head->read_avail = pos; |
| 1516 |
return false; |
| 1517 |
} |
| 1518 |
return true; |
| 1519 |
} |
| 1520 |
|
| 1521 |
/** |
| 1522 |
* ccs_print_umount_acl - Print a mount ACL entry. |
| 1523 |
* |
| 1524 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1525 |
* @ptr: Pointer to "struct ccs_umount_acl". |
| 1526 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1527 |
* |
| 1528 |
* Returns true on success, false otherwise. |
| 1529 |
*/ |
| 1530 |
static bool ccs_print_umount_acl(struct ccs_io_buffer *head, |
| 1531 |
struct ccs_umount_acl *ptr, |
| 1532 |
const struct ccs_condition *cond) |
| 1533 |
{ |
| 1534 |
const int pos = head->read_avail; |
| 1535 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_UNMOUNT) || |
| 1536 |
!ccs_print_name_union(head, &ptr->dir) || |
| 1537 |
!ccs_print_condition(head, cond)) { |
| 1538 |
head->read_avail = pos; |
| 1539 |
return false; |
| 1540 |
} |
| 1541 |
return true; |
| 1542 |
} |
| 1543 |
|
| 1544 |
/** |
| 1545 |
* ccs_print_chroot_acl - Print a chroot ACL entry. |
| 1546 |
* |
| 1547 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1548 |
* @ptr: Pointer to "struct ccs_chroot_acl". |
| 1549 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1550 |
* |
| 1551 |
* Returns true on success, false otherwise. |
| 1552 |
*/ |
| 1553 |
static bool ccs_print_chroot_acl(struct ccs_io_buffer *head, |
| 1554 |
struct ccs_chroot_acl *ptr, |
| 1555 |
const struct ccs_condition *cond) |
| 1556 |
{ |
| 1557 |
const int pos = head->read_avail; |
| 1558 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_CHROOT) || |
| 1559 |
!ccs_print_name_union(head, &ptr->dir) || |
| 1560 |
!ccs_print_condition(head, cond)) { |
| 1561 |
head->read_avail = pos; |
| 1562 |
return false; |
| 1563 |
} |
| 1564 |
return true; |
| 1565 |
} |
| 1566 |
|
| 1567 |
/** |
| 1568 |
* ccs_print_pivot_root_acl - Print a pivot_root ACL entry. |
| 1569 |
* |
| 1570 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1571 |
* @ptr: Pointer to "struct ccs_pivot_root_acl". |
| 1572 |
* @cond: Pointer to "struct ccs_condition". May be NULL. |
| 1573 |
* |
| 1574 |
* Returns true on success, false otherwise. |
| 1575 |
*/ |
| 1576 |
static bool ccs_print_pivot_root_acl(struct ccs_io_buffer *head, |
| 1577 |
struct ccs_pivot_root_acl *ptr, |
| 1578 |
const struct ccs_condition *cond) |
| 1579 |
{ |
| 1580 |
const int pos = head->read_avail; |
| 1581 |
if (!ccs_io_printf(head, CCS_KEYWORD_ALLOW_PIVOT_ROOT) || |
| 1582 |
!ccs_print_name_union(head, &ptr->new_root) || |
| 1583 |
!ccs_print_name_union(head, &ptr->old_root) || |
| 1584 |
!ccs_print_condition(head, cond)) { |
| 1585 |
head->read_avail = pos; |
| 1586 |
return false; |
| 1587 |
} |
| 1588 |
return true; |
| 1589 |
} |
| 1590 |
|
| 1591 |
/** |
| 1592 |
* ccs_print_entry - Print an ACL entry. |
| 1593 |
* |
| 1594 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1595 |
* @ptr: Pointer to an ACL entry. |
| 1596 |
* |
| 1597 |
* Returns true on success, false otherwise. |
| 1598 |
*/ |
| 1599 |
static bool ccs_print_entry(struct ccs_io_buffer *head, |
| 1600 |
struct ccs_acl_info *ptr) |
| 1601 |
{ |
| 1602 |
const struct ccs_condition *cond = ptr->cond; |
| 1603 |
const u8 acl_type = ptr->type; |
| 1604 |
if (ptr->is_deleted) |
| 1605 |
return true; |
| 1606 |
if (acl_type == CCS_TYPE_PATH_ACL) { |
| 1607 |
struct ccs_path_acl *acl |
| 1608 |
= container_of(ptr, struct ccs_path_acl, |
| 1609 |
head); |
| 1610 |
return ccs_print_path_acl(head, acl, cond); |
| 1611 |
} |
| 1612 |
if (acl_type == CCS_TYPE_EXECUTE_HANDLER) { |
| 1613 |
struct ccs_execute_handler_record *acl |
| 1614 |
= container_of(ptr, struct ccs_execute_handler_record, |
| 1615 |
head); |
| 1616 |
const char *keyword = CCS_KEYWORD_EXECUTE_HANDLER; |
| 1617 |
return ccs_print_execute_handler_record(head, keyword, acl); |
| 1618 |
} |
| 1619 |
if (acl_type == CCS_TYPE_DENIED_EXECUTE_HANDLER) { |
| 1620 |
struct ccs_execute_handler_record *acl |
| 1621 |
= container_of(ptr, struct ccs_execute_handler_record, |
| 1622 |
head); |
| 1623 |
const char *keyword = CCS_KEYWORD_DENIED_EXECUTE_HANDLER; |
| 1624 |
return ccs_print_execute_handler_record(head, keyword, acl); |
| 1625 |
} |
| 1626 |
if (head->read_execute_only) |
| 1627 |
return true; |
| 1628 |
if (acl_type == CCS_TYPE_PATH_NUMBER3_ACL) { |
| 1629 |
struct ccs_path_number3_acl *acl |
| 1630 |
= container_of(ptr, struct ccs_path_number3_acl, head); |
| 1631 |
return ccs_print_path_number3_acl(head, acl, cond); |
| 1632 |
} |
| 1633 |
if (acl_type == CCS_TYPE_PATH2_ACL) { |
| 1634 |
struct ccs_path2_acl *acl |
| 1635 |
= container_of(ptr, struct ccs_path2_acl, |
| 1636 |
head); |
| 1637 |
return ccs_print_path2_acl(head, acl, cond); |
| 1638 |
} |
| 1639 |
if (acl_type == CCS_TYPE_PATH_NUMBER_ACL) { |
| 1640 |
struct ccs_path_number_acl *acl |
| 1641 |
= container_of(ptr, struct ccs_path_number_acl, |
| 1642 |
head); |
| 1643 |
return ccs_print_path_number_acl(head, acl, cond); |
| 1644 |
} |
| 1645 |
if (acl_type == CCS_TYPE_ENV_ACL) { |
| 1646 |
struct ccs_env_acl *acl |
| 1647 |
= container_of(ptr, struct ccs_env_acl, head); |
| 1648 |
return ccs_print_env_acl(head, acl, cond); |
| 1649 |
} |
| 1650 |
if (acl_type == CCS_TYPE_CAPABILITY_ACL) { |
| 1651 |
struct ccs_capability_acl *acl |
| 1652 |
= container_of(ptr, struct ccs_capability_acl, |
| 1653 |
head); |
| 1654 |
return ccs_print_capability_acl(head, acl, cond); |
| 1655 |
} |
| 1656 |
if (acl_type == CCS_TYPE_IP_NETWORK_ACL) { |
| 1657 |
struct ccs_ip_network_acl *acl |
| 1658 |
= container_of(ptr, struct ccs_ip_network_acl, |
| 1659 |
head); |
| 1660 |
return ccs_print_network_acl(head, acl, cond); |
| 1661 |
} |
| 1662 |
if (acl_type == CCS_TYPE_SIGNAL_ACL) { |
| 1663 |
struct ccs_signal_acl *acl |
| 1664 |
= container_of(ptr, struct ccs_signal_acl, head); |
| 1665 |
return ccs_print_signal_acl(head, acl, cond); |
| 1666 |
} |
| 1667 |
if (acl_type == CCS_TYPE_MOUNT_ACL) { |
| 1668 |
struct ccs_mount_acl *acl |
| 1669 |
= container_of(ptr, struct ccs_mount_acl, head); |
| 1670 |
return ccs_print_mount_acl(head, acl, cond); |
| 1671 |
} |
| 1672 |
if (acl_type == CCS_TYPE_UMOUNT_ACL) { |
| 1673 |
struct ccs_umount_acl *acl |
| 1674 |
= container_of(ptr, struct ccs_umount_acl, head); |
| 1675 |
return ccs_print_umount_acl(head, acl, cond); |
| 1676 |
} |
| 1677 |
if (acl_type == CCS_TYPE_CHROOT_ACL) { |
| 1678 |
struct ccs_chroot_acl *acl |
| 1679 |
= container_of(ptr, struct ccs_chroot_acl, head); |
| 1680 |
return ccs_print_chroot_acl(head, acl, cond); |
| 1681 |
} |
| 1682 |
if (acl_type == CCS_TYPE_PIVOT_ROOT_ACL) { |
| 1683 |
struct ccs_pivot_root_acl *acl |
| 1684 |
= container_of(ptr, struct ccs_pivot_root_acl, |
| 1685 |
head); |
| 1686 |
return ccs_print_pivot_root_acl(head, acl, cond); |
| 1687 |
} |
| 1688 |
BUG(); /* This must not happen. */ |
| 1689 |
return false; |
| 1690 |
} |
| 1691 |
|
| 1692 |
/** |
| 1693 |
* ccs_read_domain_policy - Read domain policy. |
| 1694 |
* |
| 1695 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1696 |
* |
| 1697 |
* Caller holds ccs_read_lock(). |
| 1698 |
*/ |
| 1699 |
static void ccs_read_domain_policy(struct ccs_io_buffer *head) |
| 1700 |
{ |
| 1701 |
struct list_head *dpos; |
| 1702 |
struct list_head *apos; |
| 1703 |
if (head->read_eof) |
| 1704 |
return; |
| 1705 |
if (head->read_step == 0) |
| 1706 |
head->read_step = 1; |
| 1707 |
list_for_each_cookie(dpos, head->read_var1, &ccs_domain_list) { |
| 1708 |
struct ccs_domain_info *domain; |
| 1709 |
const char *quota_exceeded = ""; |
| 1710 |
const char *transition_failed = ""; |
| 1711 |
const char *ignore_global_allow_read = ""; |
| 1712 |
const char *ignore_global_allow_env = ""; |
| 1713 |
domain = list_entry(dpos, struct ccs_domain_info, list); |
| 1714 |
if (head->read_step != 1) |
| 1715 |
goto acl_loop; |
| 1716 |
if (domain->is_deleted && !head->read_single_domain) |
| 1717 |
continue; |
| 1718 |
/* Print domainname and flags. */ |
| 1719 |
if (domain->quota_warned) |
| 1720 |
quota_exceeded = "quota_exceeded\n"; |
| 1721 |
if (domain->domain_transition_failed) |
| 1722 |
transition_failed = "transition_failed\n"; |
| 1723 |
if (domain->ignore_global_allow_read) |
| 1724 |
ignore_global_allow_read |
| 1725 |
= CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n"; |
| 1726 |
if (domain->ignore_global_allow_env) |
| 1727 |
ignore_global_allow_env |
| 1728 |
= CCS_KEYWORD_IGNORE_GLOBAL_ALLOW_ENV "\n"; |
| 1729 |
if (!ccs_io_printf(head, "%s\n" CCS_KEYWORD_USE_PROFILE "%u\n" |
| 1730 |
"%s%s%s%s\n", domain->domainname->name, |
| 1731 |
domain->profile, quota_exceeded, |
| 1732 |
transition_failed, |
| 1733 |
ignore_global_allow_read, |
| 1734 |
ignore_global_allow_env)) |
| 1735 |
return; |
| 1736 |
head->read_step = 2; |
| 1737 |
acl_loop: |
| 1738 |
if (head->read_step == 3) |
| 1739 |
goto tail_mark; |
| 1740 |
/* Print ACL entries in the domain. */ |
| 1741 |
list_for_each_cookie(apos, head->read_var2, |
| 1742 |
&domain->acl_info_list) { |
| 1743 |
struct ccs_acl_info *ptr |
| 1744 |
= list_entry(apos, struct ccs_acl_info, list); |
| 1745 |
if (!ccs_print_entry(head, ptr)) |
| 1746 |
return; |
| 1747 |
} |
| 1748 |
head->read_step = 3; |
| 1749 |
tail_mark: |
| 1750 |
if (!ccs_io_printf(head, "\n")) |
| 1751 |
return; |
| 1752 |
head->read_step = 1; |
| 1753 |
if (head->read_single_domain) |
| 1754 |
break; |
| 1755 |
} |
| 1756 |
head->read_eof = true; |
| 1757 |
} |
| 1758 |
|
| 1759 |
/** |
| 1760 |
* ccs_write_domain_profile - Assign profile for specified domain. |
| 1761 |
* |
| 1762 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1763 |
* |
| 1764 |
* Returns 0 on success, -EINVAL otherwise. |
| 1765 |
* |
| 1766 |
* This is equivalent to doing |
| 1767 |
* |
| 1768 |
* ( echo "select " $domainname; echo "use_profile " $profile ) | |
| 1769 |
* /usr/sbin/ccs-loadpolicy -d |
| 1770 |
* |
| 1771 |
* Caller holds ccs_read_lock(). |
| 1772 |
*/ |
| 1773 |
static int ccs_write_domain_profile(struct ccs_io_buffer *head) |
| 1774 |
{ |
| 1775 |
char *data = head->write_buf; |
| 1776 |
char *cp = strchr(data, ' '); |
| 1777 |
struct ccs_domain_info *domain; |
| 1778 |
unsigned int profile; |
| 1779 |
if (!cp) |
| 1780 |
return -EINVAL; |
| 1781 |
*cp = '\0'; |
| 1782 |
profile = simple_strtoul(data, NULL, 10); |
| 1783 |
if (profile >= CCS_MAX_PROFILES) |
| 1784 |
return -EINVAL; |
| 1785 |
domain = ccs_find_domain(cp + 1); |
| 1786 |
if (domain && ccs_profile(profile)) |
| 1787 |
domain->profile = (u8) profile; |
| 1788 |
return 0; |
| 1789 |
} |
| 1790 |
|
| 1791 |
/** |
| 1792 |
* ccs_read_domain_profile - Read only domainname and profile. |
| 1793 |
* |
| 1794 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1795 |
* |
| 1796 |
* This is equivalent to doing |
| 1797 |
* |
| 1798 |
* grep -A 1 '^<kernel>' /proc/ccs/domain_policy | |
| 1799 |
* awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" ) |
| 1800 |
* domainname = $0; } else if ( $1 == "use_profile" ) { |
| 1801 |
* print $2 " " domainname; domainname = ""; } } ; ' |
| 1802 |
* |
| 1803 |
* Caller holds ccs_read_lock(). |
| 1804 |
*/ |
| 1805 |
static void ccs_read_domain_profile(struct ccs_io_buffer *head) |
| 1806 |
{ |
| 1807 |
struct list_head *pos; |
| 1808 |
if (head->read_eof) |
| 1809 |
return; |
| 1810 |
list_for_each_cookie(pos, head->read_var1, &ccs_domain_list) { |
| 1811 |
struct ccs_domain_info *domain; |
| 1812 |
domain = list_entry(pos, struct ccs_domain_info, list); |
| 1813 |
if (domain->is_deleted) |
| 1814 |
continue; |
| 1815 |
if (!ccs_io_printf(head, "%u %s\n", domain->profile, |
| 1816 |
domain->domainname->name)) |
| 1817 |
return; |
| 1818 |
} |
| 1819 |
head->read_eof = true; |
| 1820 |
} |
| 1821 |
|
| 1822 |
/** |
| 1823 |
* ccs_write_pid: Specify PID to obtain domainname. |
| 1824 |
* |
| 1825 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1826 |
* |
| 1827 |
* Returns 0. |
| 1828 |
*/ |
| 1829 |
static int ccs_write_pid(struct ccs_io_buffer *head) |
| 1830 |
{ |
| 1831 |
head->read_eof = false; |
| 1832 |
return 0; |
| 1833 |
} |
| 1834 |
|
| 1835 |
/** |
| 1836 |
* ccs_read_pid - Read information of a process. |
| 1837 |
* |
| 1838 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1839 |
* |
| 1840 |
* Returns the domainname which the specified PID is in or |
| 1841 |
* process information of the specified PID on success, |
| 1842 |
* empty string otherwise. |
| 1843 |
* |
| 1844 |
* Caller holds ccs_read_lock(). |
| 1845 |
*/ |
| 1846 |
static void ccs_read_pid(struct ccs_io_buffer *head) |
| 1847 |
{ |
| 1848 |
char *buf = head->write_buf; |
| 1849 |
bool task_info = false; |
| 1850 |
bool global_pid = false; |
| 1851 |
unsigned int pid; |
| 1852 |
struct task_struct *p; |
| 1853 |
struct ccs_domain_info *domain = NULL; |
| 1854 |
u32 ccs_flags = 0; |
| 1855 |
/* Accessing write_buf is safe because head->io_sem is held. */ |
| 1856 |
if (!buf) |
| 1857 |
return; /* Do nothing if open(O_RDONLY). */ |
| 1858 |
if (head->read_avail || head->read_eof) |
| 1859 |
return; |
| 1860 |
head->read_eof = true; |
| 1861 |
if (ccs_str_starts(&buf, "info ")) |
| 1862 |
task_info = true; |
| 1863 |
if (ccs_str_starts(&buf, "global-pid ")) |
| 1864 |
global_pid = true; |
| 1865 |
pid = (unsigned int) simple_strtoul(buf, NULL, 10); |
| 1866 |
read_lock(&tasklist_lock); |
| 1867 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 24) |
| 1868 |
if (global_pid) |
| 1869 |
p = find_task_by_pid_ns(pid, &init_pid_ns); |
| 1870 |
else |
| 1871 |
p = find_task_by_vpid(pid); |
| 1872 |
#else |
| 1873 |
p = find_task_by_pid(pid); |
| 1874 |
#endif |
| 1875 |
if (p) { |
| 1876 |
domain = ccs_task_domain(p); |
| 1877 |
ccs_flags = p->ccs_flags; |
| 1878 |
} |
| 1879 |
read_unlock(&tasklist_lock); |
| 1880 |
if (!domain) |
| 1881 |
return; |
| 1882 |
if (!task_info) |
| 1883 |
ccs_io_printf(head, "%u %u %s", pid, domain->profile, |
| 1884 |
domain->domainname->name); |
| 1885 |
else |
| 1886 |
ccs_io_printf(head, "%u manager=%s execute_handler=%s " |
| 1887 |
"state[0]=%u state[1]=%u state[2]=%u", pid, |
| 1888 |
ccs_yesno(ccs_flags & |
| 1889 |
CCS_TASK_IS_POLICY_MANAGER), |
| 1890 |
ccs_yesno(ccs_flags & |
| 1891 |
CCS_TASK_IS_EXECUTE_HANDLER), |
| 1892 |
(u8) (ccs_flags >> 24), |
| 1893 |
(u8) (ccs_flags >> 16), |
| 1894 |
(u8) (ccs_flags >> 8)); |
| 1895 |
} |
| 1896 |
|
| 1897 |
/** |
| 1898 |
* ccs_write_exception_policy - Write exception policy. |
| 1899 |
* |
| 1900 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1901 |
* |
| 1902 |
* Returns 0 on success, negative value otherwise. |
| 1903 |
*/ |
| 1904 |
static int ccs_write_exception_policy(struct ccs_io_buffer *head) |
| 1905 |
{ |
| 1906 |
char *data = head->write_buf; |
| 1907 |
bool is_delete = ccs_str_starts(&data, CCS_KEYWORD_DELETE); |
| 1908 |
if (ccs_str_starts(&data, CCS_KEYWORD_KEEP_DOMAIN)) |
| 1909 |
return ccs_write_domain_keeper_policy(data, false, is_delete); |
| 1910 |
if (ccs_str_starts(&data, CCS_KEYWORD_NO_KEEP_DOMAIN)) |
| 1911 |
return ccs_write_domain_keeper_policy(data, true, is_delete); |
| 1912 |
if (ccs_str_starts(&data, CCS_KEYWORD_INITIALIZE_DOMAIN)) |
| 1913 |
return ccs_write_domain_initializer_policy(data, false, |
| 1914 |
is_delete); |
| 1915 |
if (ccs_str_starts(&data, CCS_KEYWORD_NO_INITIALIZE_DOMAIN)) |
| 1916 |
return ccs_write_domain_initializer_policy(data, true, |
| 1917 |
is_delete); |
| 1918 |
if (ccs_str_starts(&data, CCS_KEYWORD_AGGREGATOR)) |
| 1919 |
return ccs_write_aggregator_policy(data, is_delete); |
| 1920 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_READ)) |
| 1921 |
return ccs_write_globally_readable_policy(data, is_delete); |
| 1922 |
if (ccs_str_starts(&data, CCS_KEYWORD_ALLOW_ENV)) |
| 1923 |
return ccs_write_globally_usable_env_policy(data, is_delete); |
| 1924 |
if (ccs_str_starts(&data, CCS_KEYWORD_FILE_PATTERN)) |
| 1925 |
return ccs_write_pattern_policy(data, is_delete); |
| 1926 |
if (ccs_str_starts(&data, CCS_KEYWORD_PATH_GROUP)) |
| 1927 |
return ccs_write_path_group_policy(data, is_delete); |
| 1928 |
if (ccs_str_starts(&data, CCS_KEYWORD_NUMBER_GROUP)) |
| 1929 |
return ccs_write_number_group_policy(data, is_delete); |
| 1930 |
if (ccs_str_starts(&data, CCS_KEYWORD_DENY_REWRITE)) |
| 1931 |
return ccs_write_no_rewrite_policy(data, is_delete); |
| 1932 |
if (ccs_str_starts(&data, CCS_KEYWORD_ADDRESS_GROUP)) |
| 1933 |
return ccs_write_address_group_policy(data, is_delete); |
| 1934 |
if (ccs_str_starts(&data, CCS_KEYWORD_DENY_AUTOBIND)) |
| 1935 |
return ccs_write_reserved_port_policy(data, is_delete); |
| 1936 |
return -EINVAL; |
| 1937 |
} |
| 1938 |
|
| 1939 |
/** |
| 1940 |
* ccs_read_exception_policy - Read exception policy. |
| 1941 |
* |
| 1942 |
* @head: Pointer to "struct ccs_io_buffer". |
| 1943 |
* |
| 1944 |
* Caller holds ccs_read_lock(). |
| 1945 |
*/ |
| 1946 |
static void ccs_read_exception_policy(struct ccs_io_buffer *head) |
| 1947 |
{ |
| 1948 |
if (head->read_eof) |
| 1949 |
return; |
| 1950 |
switch (head->read_step) { |
| 1951 |
case 0: |
| 1952 |
head->read_var2 = NULL; |
| 1953 |
head->read_step = 1; |
| 1954 |
case 1: |
| 1955 |
if (!ccs_read_domain_keeper_policy(head)) |
| 1956 |
break; |
| 1957 |
head->read_var2 = NULL; |
| 1958 |
head->read_step = 2; |
| 1959 |
case 2: |
| 1960 |
if (!ccs_read_globally_readable_policy(head)) |
| 1961 |
break; |
| 1962 |
head->read_var2 = NULL; |
| 1963 |
head->read_step = 3; |
| 1964 |
case 3: |
| 1965 |
if (!ccs_read_globally_usable_env_policy(head)) |
| 1966 |
break; |
| 1967 |
head->read_var2 = NULL; |
| 1968 |
head->read_step = 4; |
| 1969 |
case 4: |
| 1970 |
if (!ccs_read_domain_initializer_policy(head)) |
| 1971 |
break; |
| 1972 |
head->read_var2 = NULL; |
| 1973 |
head->read_step = 6; |
| 1974 |
case 6: |
| 1975 |
if (!ccs_read_aggregator_policy(head)) |
| 1976 |
break; |
| 1977 |
head->read_var2 = NULL; |
| 1978 |
head->read_step = 7; |
| 1979 |
case 7: |
| 1980 |
if (!ccs_read_file_pattern(head)) |
| 1981 |
break; |
| 1982 |
head->read_var2 = NULL; |
| 1983 |
head->read_step = 8; |
| 1984 |
case 8: |
| 1985 |
if (!ccs_read_no_rewrite_policy(head)) |
| 1986 |
break; |
| 1987 |
head->read_var2 = NULL; |
| 1988 |
head->read_step = 9; |
| 1989 |
case 9: |
| 1990 |
if (!ccs_read_path_group_policy(head)) |
| 1991 |
break; |
| 1992 |
head->read_var1 = NULL; |
| 1993 |
head->read_var2 = NULL; |
| 1994 |
head->read_step = 10; |
| 1995 |
case 10: |
| 1996 |
if (!ccs_read_number_group_policy(head)) |
| 1997 |
break; |
| 1998 |
head->read_var1 = NULL; |
| 1999 |
head->read_var2 = NULL; |
| 2000 |
head->read_step = 11; |
| 2001 |
case 11: |
| 2002 |
if (!ccs_read_address_group_policy(head)) |
| 2003 |
break; |
| 2004 |
head->read_var2 = NULL; |
| 2005 |
head->read_step = 12; |
| 2006 |
case 12: |
| 2007 |
if (!ccs_read_reserved_port_policy(head)) |
| 2008 |
break; |
| 2009 |
head->read_eof = true; |
| 2010 |
} |
| 2011 |
} |
| 2012 |
|
| 2013 |
/** |
| 2014 |
* ccs_get_argv0 - Get argv[0]. |
| 2015 |
* |
| 2016 |
* @ee: Pointer to "struct ccs_execve_entry". |
| 2017 |
* |
| 2018 |
* Returns true on success, false otherwise. |
| 2019 |
*/ |
| 2020 |
static bool ccs_get_argv0(struct ccs_execve_entry *ee) |
| 2021 |
{ |
| 2022 |
struct linux_binprm *bprm = ee->bprm; |
| 2023 |
char *arg_ptr = ee->tmp; |
| 2024 |
int arg_len = 0; |
| 2025 |
unsigned long pos = bprm->p; |
| 2026 |
int offset = pos % PAGE_SIZE; |
| 2027 |
bool done = false; |
| 2028 |
if (!bprm->argc) |
| 2029 |
goto out; |
| 2030 |
while (1) { |
| 2031 |
if (!ccs_dump_page(bprm, pos, &ee->dump)) |
| 2032 |
goto out; |
| 2033 |
pos += PAGE_SIZE - offset; |
| 2034 |
/* Read. */ |
| 2035 |
while (offset < PAGE_SIZE) { |
| 2036 |
const char *kaddr = ee->dump.data; |
| 2037 |
const unsigned char c = kaddr[offset++]; |
| 2038 |
if (c && arg_len < CCS_EXEC_TMPSIZE - 10) { |
| 2039 |
if (c == '\\') { |
| 2040 |
arg_ptr[arg_len++] = '\\'; |
| 2041 |
arg_ptr[arg_len++] = '\\'; |
| 2042 |
} else if (c > ' ' && c < 127) { |
| 2043 |
arg_ptr[arg_len++] = c; |
| 2044 |
} else { |
| 2045 |
arg_ptr[arg_len++] = '\\'; |
| 2046 |
arg_ptr[arg_len++] = (c >> 6) + '0'; |
| 2047 |
arg_ptr[arg_len++] |
| 2048 |
= ((c >> 3) & 7) + '0'; |
| 2049 |
arg_ptr[arg_len++] = (c & 7) + '0'; |
| 2050 |
} |
| 2051 |
} else { |
| 2052 |
arg_ptr[arg_len] = '\0'; |
| 2053 |
done = true; |
| 2054 |
break; |
| 2055 |
} |
| 2056 |
} |
| 2057 |
offset = 0; |
| 2058 |
if (done) |
| 2059 |
break; |
| 2060 |
} |
| 2061 |
return true; |
| 2062 |
out: |
| 2063 |
return false; |
| 2064 |
} |
| 2065 |
|
| 2066 |
/** |
| 2067 |
* ccs_get_execute_condition - Get condition part for execute requests. |
| 2068 |
* |
| 2069 |
* @ee: Pointer to "struct ccs_execve_entry". |
| 2070 |
* |
| 2071 |
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 2072 |
*/ |
| 2073 |
static struct ccs_condition *ccs_get_execute_condition(struct ccs_execve_entry |
| 2074 |
*ee) |
| 2075 |
{ |
| 2076 |
struct ccs_condition *cond; |
| 2077 |
char *buf; |
| 2078 |
int len = 256; |
| 2079 |
char *realpath = NULL; |
| 2080 |
char *argv0 = NULL; |
| 2081 |
const struct ccs_profile *profile = ccs_profile(ee->r.domain->profile); |
| 2082 |
if (profile->learning->learning_exec_realpath) { |
| 2083 |
struct file *file = ee->bprm->file; |
| 2084 |
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20) |
| 2085 |
struct path path = { file->f_vfsmnt, file->f_dentry }; |
| 2086 |
realpath = ccs_realpath_from_path(&path); |
| 2087 |
#else |
| 2088 |
realpath = ccs_realpath_from_path(&file->f_path); |
| 2089 |
#endif |
| 2090 |
if (realpath) |
| 2091 |
len += strlen(realpath) + 17; |
| 2092 |
} |
| 2093 |
if (profile->learning->learning_exec_argv0) { |
| 2094 |
if (ccs_get_argv0(ee)) { |
| 2095 |
argv0 = ee->tmp; |
| 2096 |
len += strlen(argv0) + 16; |
| 2097 |
} |
| 2098 |
} |
| 2099 |
buf = kmalloc(len, GFP_KERNEL); |
| 2100 |
if (!buf) { |
| 2101 |
kfree(realpath); |
| 2102 |
return NULL; |
| 2103 |
} |
| 2104 |
snprintf(buf, len - 1, "if"); |
| 2105 |
if (current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) { |
| 2106 |
const int pos = strlen(buf); |
| 2107 |
snprintf(buf + pos, len - pos - 1, |
| 2108 |
" task.type=execute_handler"); |
| 2109 |
} |
| 2110 |
if (realpath) { |
| 2111 |
const int pos = strlen(buf); |
| 2112 |
snprintf(buf + pos, len - pos - 1, " exec.realpath=\"%s\"", |
| 2113 |
realpath); |
| 2114 |
kfree(realpath); |
| 2115 |
} |
| 2116 |
if (argv0) { |
| 2117 |
const int pos = strlen(buf); |
| 2118 |
snprintf(buf + pos, len - pos - 1, " exec.argv[0]=\"%s\"", |
| 2119 |
argv0); |
| 2120 |
} |
| 2121 |
cond = ccs_get_condition(buf); |
| 2122 |
kfree(buf); |
| 2123 |
return cond; |
| 2124 |
} |
| 2125 |
|
| 2126 |
/** |
| 2127 |
* ccs_get_symlink_condition - Get condition part for symlink requests. |
| 2128 |
* |
| 2129 |
* @r: Pointer to "struct ccs_request_info". |
| 2130 |
* |
| 2131 |
* Returns pointer to "struct ccs_condition" on success, NULL otherwise. |
| 2132 |
*/ |
| 2133 |
static struct ccs_condition *ccs_get_symlink_condition(struct ccs_request_info |
| 2134 |
*r) |
| 2135 |
{ |
| 2136 |
struct ccs_condition *cond; |
| 2137 |
char *buf; |
| 2138 |
int len = 256; |
| 2139 |
const char *symlink = NULL; |
| 2140 |
const struct ccs_profile *profile = ccs_profile(r->profile); |
| 2141 |
if (profile->learning->learning_symlink_target) { |
| 2142 |
symlink = r->obj->symlink_target->name; |
| 2143 |
len += strlen(symlink) + 18; |
| 2144 |
} |
| 2145 |
buf = kmalloc(len, GFP_KERNEL); |
| 2146 |
if (!buf) |
| 2147 |
return NULL; |
| 2148 |
snprintf(buf, len - 1, "if"); |
| 2149 |
if (current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER) { |
| 2150 |
const int pos = strlen(buf); |
| 2151 |
snprintf(buf + pos, len - pos - 1, |
| 2152 |
" task.type=execute_handler"); |
| 2153 |
} |
| 2154 |
if (symlink) { |
| 2155 |
const int pos = strlen(buf); |
| 2156 |
snprintf(buf + pos, len - pos - 1, " symlink.target=\"%s\"", |
| 2157 |
symlink); |
| 2158 |
} |
| 2159 |
cond = ccs_get_condition(buf); |
| 2160 |
kfree(buf); |
| 2161 |
return cond; |
| 2162 |
} |
| 2163 |
|
| 2164 |
/* Wait queue for ccs_query_list. */ |
| 2165 |
static DECLARE_WAIT_QUEUE_HEAD(ccs_query_wait); |
| 2166 |
|
| 2167 |
/* Lock for manipulating ccs_query_list. */ |
| 2168 |
static DEFINE_SPINLOCK(ccs_query_list_lock); |
| 2169 |
|
| 2170 |
/* Structure for query. */ |
| 2171 |
struct ccs_query_entry { |
| 2172 |
struct list_head list; |
| 2173 |
char *query; |
| 2174 |
int query_len; |
| 2175 |
unsigned int serial; |
| 2176 |
int timer; |
| 2177 |
int answer; |
| 2178 |
}; |
| 2179 |
|
| 2180 |
/* The list for "struct ccs_query_entry". */ |
| 2181 |
static LIST_HEAD(ccs_query_list); |
| 2182 |
|
| 2183 |
/* Number of "struct file" referring /proc/ccs/query interface. */ |
| 2184 |
static atomic_t ccs_query_observers = ATOMIC_INIT(0); |
| 2185 |
|
| 2186 |
/** |
| 2187 |
* ccs_supervisor - Ask for the supervisor's decision. |
| 2188 |
* |
| 2189 |
* @r: Pointer to "struct ccs_request_info". |
| 2190 |
* @fmt: The printf()'s format string, followed by parameters. |
| 2191 |
* |
| 2192 |
* Returns 0 if the supervisor decided to permit the access request which |
| 2193 |
* violated the policy in enforcing mode, 1 if the supervisor decided to |
| 2194 |
* retry the access request which violated the policy in enforcing mode, |
| 2195 |
* 0 if it is not in enforcing mode, -EPERM otherwise. |
| 2196 |
*/ |
| 2197 |
int ccs_supervisor(struct ccs_request_info *r, const char *fmt, ...) |
| 2198 |
{ |
| 2199 |
va_list args; |
| 2200 |
int error = -EPERM; |
| 2201 |
int pos; |
| 2202 |
int len; |
| 2203 |
static unsigned int ccs_serial; |
| 2204 |
struct ccs_query_entry *ccs_query_entry = NULL; |
| 2205 |
bool quota_exceeded = false; |
| 2206 |
char *header; |
| 2207 |
if (!r->domain) |
| 2208 |
r->domain = ccs_current_domain(); |
| 2209 |
switch (r->mode) { |
| 2210 |
char *buffer; |
| 2211 |
struct ccs_condition *cond; |
| 2212 |
case CCS_CONFIG_LEARNING: |
| 2213 |
if (!ccs_domain_quota_ok(r)) |
| 2214 |
return 0; |
| 2215 |
va_start(args, fmt); |
| 2216 |
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 4; |
| 2217 |
va_end(args); |
| 2218 |
buffer = kmalloc(len, GFP_KERNEL); |
| 2219 |
if (!buffer) |
| 2220 |
return 0; |
| 2221 |
va_start(args, fmt); |
| 2222 |
vsnprintf(buffer, len - 1, fmt, args); |
| 2223 |
va_end(args); |
| 2224 |
ccs_normalize_line(buffer); |
| 2225 |
if (r->ee && !strncmp(buffer, "allow_execute ", 14)) |
| 2226 |
cond = ccs_get_execute_condition(r->ee); |
| 2227 |
else if (r->obj && r->obj->symlink_target) |
| 2228 |
cond = ccs_get_symlink_condition(r); |
| 2229 |
else if ((current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER)) { |
| 2230 |
char str[] = "if task.type=execute_handler"; |
| 2231 |
cond = ccs_get_condition(str); |
| 2232 |
} else |
| 2233 |
cond = NULL; |
| 2234 |
ccs_write_domain_policy2(buffer, r->domain, cond, false); |
| 2235 |
ccs_put_condition(cond); |
| 2236 |
kfree(buffer); |
| 2237 |
/* fall through */ |
| 2238 |
case CCS_CONFIG_PERMISSIVE: |
| 2239 |
return 0; |
| 2240 |
} |
| 2241 |
if (!atomic_read(&ccs_query_observers)) { |
| 2242 |
int i; |
| 2243 |
if (current->ccs_flags & CCS_DONT_SLEEP_ON_ENFORCE_ERROR) |
| 2244 |
return -EPERM; |
| 2245 |
for (i = 0; i < ccs_profile(r->domain->profile)->enforcing-> |
| 2246 |
enforcing_penalty; i++) { |
| 2247 |
set_current_state(TASK_INTERRUPTIBLE); |
| 2248 |
schedule_timeout(HZ / 10); |
| 2249 |
} |
| 2250 |
return -EPERM; |
| 2251 |
} |
| 2252 |
va_start(args, fmt); |
| 2253 |
len = vsnprintf((char *) &pos, sizeof(pos) - 1, fmt, args) + 32; |
| 2254 |
va_end(args); |
| 2255 |
header = ccs_init_audit_log(&len, r); |
| 2256 |
if (!header) |
| 2257 |
goto out; |
| 2258 |
ccs_query_entry = kzalloc(sizeof(*ccs_query_entry), GFP_KERNEL); |
| 2259 |
if (!ccs_query_entry) |
| 2260 |
goto out; |
| 2261 |
len = ccs_round2(len); |
| 2262 |
ccs_query_entry->query = kzalloc(len, GFP_KERNEL); |
| 2263 |
if (!ccs_query_entry->query) |
| 2264 |
goto out; |
| 2265 |
INIT_LIST_HEAD(&ccs_query_entry->list); |
| 2266 |
spin_lock(&ccs_query_list_lock); |
| 2267 |
if (ccs_quota_for_query && ccs_query_memory_size + len + |
| 2268 |
sizeof(*ccs_query_entry) >= ccs_quota_for_query) { |
| 2269 |
quota_exceeded = true; |
| 2270 |
} else { |
| 2271 |
ccs_query_memory_size += len + sizeof(*ccs_query_entry); |
| 2272 |
ccs_query_entry->serial = ccs_serial++; |
| 2273 |
} |
| 2274 |
spin_unlock(&ccs_query_list_lock); |
| 2275 |
if (quota_exceeded) |
| 2276 |
goto out; |
| 2277 |
pos = snprintf(ccs_query_entry->query, len - 1, "Q%u-%hu\n%s", |
| 2278 |
ccs_query_entry->serial, r->retry, header); |
| 2279 |
kfree(header); |
| 2280 |
header = NULL; |
| 2281 |
va_start(args, fmt); |
| 2282 |
vsnprintf(ccs_query_entry->query + pos, len - 1 - pos, fmt, args); |
| 2283 |
ccs_query_entry->query_len = strlen(ccs_query_entry->query) + 1; |
| 2284 |
va_end(args); |
| 2285 |
spin_lock(&ccs_query_list_lock); |
| 2286 |
list_add_tail(&ccs_query_entry->list, &ccs_query_list); |
| 2287 |
spin_unlock(&ccs_query_list_lock); |
| 2288 |
/* Give 10 seconds for supervisor's opinion. */ |
| 2289 |
for (ccs_query_entry->timer = 0; |
| 2290 |
atomic_read(&ccs_query_observers) && ccs_query_entry->timer < 100; |
| 2291 |
ccs_query_entry->timer++) { |
| 2292 |
wake_up(&ccs_query_wait); |
| 2293 |
set_current_state(TASK_INTERRUPTIBLE); |
| 2294 |
schedule_timeout(HZ / 10); |
| 2295 |
if (ccs_query_entry->answer) |
| 2296 |
break; |
| 2297 |
} |
| 2298 |
spin_lock(&ccs_query_list_lock); |
| 2299 |
list_del(&ccs_query_entry->list); |
| 2300 |
ccs_query_memory_size -= len + sizeof(*ccs_query_entry); |
| 2301 |
spin_unlock(&ccs_query_list_lock); |
| 2302 |
switch (ccs_query_entry->answer) { |
| 2303 |
case 3: /* Asked to retry by administrator. */ |
| 2304 |
error = 1; |
| 2305 |
r->retry++; |
| 2306 |
break; |
| 2307 |
case 1: |
| 2308 |
/* Granted by administrator. */ |
| 2309 |
error = 0; |
| 2310 |
break; |
| 2311 |
case 0: |
| 2312 |
/* Timed out. */ |
| 2313 |
break; |
| 2314 |
default: |
| 2315 |
/* Rejected by administrator. */ |
| 2316 |
break; |
| 2317 |
} |
| 2318 |
out: |
| 2319 |
if (ccs_query_entry) |
| 2320 |
kfree(ccs_query_entry->query); |
| 2321 |
kfree(ccs_query_entry); |
| 2322 |
kfree(header); |
| 2323 |
return error; |
| 2324 |
} |
| 2325 |
|
| 2326 |
/** |
| 2327 |
* ccs_poll_query - poll() for /proc/ccs/query. |
| 2328 |
* |
| 2329 |
* @file: Pointer to "struct file". |
| 2330 |
* @wait: Pointer to "poll_table". |
| 2331 |
* |
| 2332 |
* Returns POLLIN | POLLRDNORM when ready to read, 0 otherwise. |
| 2333 |
* |
| 2334 |
* Waits for access requests which violated policy in enforcing mode. |
| 2335 |
*/ |
| 2336 |
static int ccs_poll_query(struct file *file, poll_table *wait) |
| 2337 |
{ |
| 2338 |
struct list_head *tmp; |
| 2339 |
bool found = false; |
| 2340 |
u8 i; |
| 2341 |
for (i = 0; i < 2; i++) { |
| 2342 |
spin_lock(&ccs_query_list_lock); |
| 2343 |
list_for_each(tmp, &ccs_query_list) { |
| 2344 |
struct ccs_query_entry *ptr |
| 2345 |
= list_entry(tmp, struct ccs_query_entry, list); |
| 2346 |
if (ptr->answer) |
| 2347 |
continue; |
| 2348 |
found = true; |
| 2349 |
break; |
| 2350 |
} |
| 2351 |
spin_unlock(&ccs_query_list_lock); |
| 2352 |
if (found) |
| 2353 |
return POLLIN | POLLRDNORM; |
| 2354 |
if (i) |
| 2355 |
break; |
| 2356 |
poll_wait(file, &ccs_query_wait, wait); |
| 2357 |
} |
| 2358 |
return 0; |
| 2359 |
} |
| 2360 |
|
| 2361 |
/** |
| 2362 |
* ccs_read_query - Read access requests which violated policy in enforcing mode. |
| 2363 |
* |
| 2364 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2365 |
*/ |
| 2366 |
static void ccs_read_query(struct ccs_io_buffer *head) |
| 2367 |
{ |
| 2368 |
struct list_head *tmp; |
| 2369 |
int pos = 0; |
| 2370 |
int len = 0; |
| 2371 |
char *buf; |
| 2372 |
if (head->read_avail) |
| 2373 |
return; |
| 2374 |
if (head->read_buf) { |
| 2375 |
kfree(head->read_buf); |
| 2376 |
head->read_buf = NULL; |
| 2377 |
head->readbuf_size = 0; |
| 2378 |
} |
| 2379 |
spin_lock(&ccs_query_list_lock); |
| 2380 |
list_for_each(tmp, &ccs_query_list) { |
| 2381 |
struct ccs_query_entry *ptr |
| 2382 |
= list_entry(tmp, struct ccs_query_entry, list); |
| 2383 |
if (ptr->answer) |
| 2384 |
continue; |
| 2385 |
if (pos++ != head->read_step) |
| 2386 |
continue; |
| 2387 |
len = ptr->query_len; |
| 2388 |
break; |
| 2389 |
} |
| 2390 |
spin_unlock(&ccs_query_list_lock); |
| 2391 |
if (!len) { |
| 2392 |
head->read_step = 0; |
| 2393 |
return; |
| 2394 |
} |
| 2395 |
buf = kzalloc(len, GFP_KERNEL); |
| 2396 |
if (!buf) |
| 2397 |
return; |
| 2398 |
pos = 0; |
| 2399 |
spin_lock(&ccs_query_list_lock); |
| 2400 |
list_for_each(tmp, &ccs_query_list) { |
| 2401 |
struct ccs_query_entry *ptr |
| 2402 |
= list_entry(tmp, struct ccs_query_entry, list); |
| 2403 |
if (ptr->answer) |
| 2404 |
continue; |
| 2405 |
if (pos++ != head->read_step) |
| 2406 |
continue; |
| 2407 |
/* |
| 2408 |
* Some query can be skipped because ccs_query_list |
| 2409 |
* can change, but I don't care. |
| 2410 |
*/ |
| 2411 |
if (len == ptr->query_len) |
| 2412 |
memmove(buf, ptr->query, len); |
| 2413 |
break; |
| 2414 |
} |
| 2415 |
spin_unlock(&ccs_query_list_lock); |
| 2416 |
if (buf[0]) { |
| 2417 |
head->read_avail = len; |
| 2418 |
head->readbuf_size = head->read_avail; |
| 2419 |
head->read_buf = buf; |
| 2420 |
head->read_step++; |
| 2421 |
} else { |
| 2422 |
kfree(buf); |
| 2423 |
} |
| 2424 |
} |
| 2425 |
|
| 2426 |
/** |
| 2427 |
* ccs_write_answer - Write the supervisor's decision. |
| 2428 |
* |
| 2429 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2430 |
* |
| 2431 |
* Returns 0 on success, -EINVAL otherwise. |
| 2432 |
*/ |
| 2433 |
static int ccs_write_answer(struct ccs_io_buffer *head) |
| 2434 |
{ |
| 2435 |
char *data = head->write_buf; |
| 2436 |
struct list_head *tmp; |
| 2437 |
unsigned int serial; |
| 2438 |
unsigned int answer; |
| 2439 |
spin_lock(&ccs_query_list_lock); |
| 2440 |
list_for_each(tmp, &ccs_query_list) { |
| 2441 |
struct ccs_query_entry *ptr |
| 2442 |
= list_entry(tmp, struct ccs_query_entry, list); |
| 2443 |
ptr->timer = 0; |
| 2444 |
} |
| 2445 |
spin_unlock(&ccs_query_list_lock); |
| 2446 |
if (sscanf(data, "A%u=%u", &serial, &answer) != 2) |
| 2447 |
return -EINVAL; |
| 2448 |
spin_lock(&ccs_query_list_lock); |
| 2449 |
list_for_each(tmp, &ccs_query_list) { |
| 2450 |
struct ccs_query_entry *ptr |
| 2451 |
= list_entry(tmp, struct ccs_query_entry, list); |
| 2452 |
if (ptr->serial != serial) |
| 2453 |
continue; |
| 2454 |
if (!ptr->answer) |
| 2455 |
ptr->answer = answer; |
| 2456 |
break; |
| 2457 |
} |
| 2458 |
spin_unlock(&ccs_query_list_lock); |
| 2459 |
return 0; |
| 2460 |
} |
| 2461 |
|
| 2462 |
/** |
| 2463 |
* ccs_read_version: Get version. |
| 2464 |
* |
| 2465 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2466 |
*/ |
| 2467 |
static void ccs_read_version(struct ccs_io_buffer *head) |
| 2468 |
{ |
| 2469 |
if (head->read_eof) |
| 2470 |
return; |
| 2471 |
ccs_io_printf(head, "1.7.0-pre"); |
| 2472 |
head->read_eof = true; |
| 2473 |
} |
| 2474 |
|
| 2475 |
/** |
| 2476 |
* ccs_read_self_domain - Get the current process's domainname. |
| 2477 |
* |
| 2478 |
* @head: Pointer to "struct ccs_io_buffer". |
| 2479 |
*/ |
| 2480 |
static void ccs_read_self_domain(struct ccs_io_buffer *head) |
| 2481 |
{ |
| 2482 |
if (head->read_eof) |
| 2483 |
return; |
| 2484 |
/* |
| 2485 |
* ccs_current_domain()->domainname != NULL because every process |
| 2486 |
* belongs to a domain and the domain's name cannot be NULL. |
| 2487 |
*/ |
| 2488 |
ccs_io_printf(head, "%s", ccs_current_domain()->domainname->name); |
| 2489 |
head->read_eof = true; |
| 2490 |
} |
| 2491 |
|
| 2492 |
/** |
| 2493 |
* ccs_open_control - open() for /proc/ccs/ interface. |
| 2494 |
* |
| 2495 |
* @type: Type of interface. |
| 2496 |
* @file: Pointer to "struct file". |
| 2497 |
* |
| 2498 |
* Associates policy handler and returns 0 on success, -ENOMEM otherwise. |
| 2499 |
*/ |
| 2500 |
int ccs_open_control(const u8 type, struct file *file) |
| 2501 |
{ |
| 2502 |
struct ccs_io_buffer *head = kzalloc(sizeof(*head), GFP_KERNEL); |
| 2503 |
if (!head) |
| 2504 |
return -ENOMEM; |
| 2505 |
mutex_init(&head->io_sem); |
| 2506 |
head->type = type; |
| 2507 |
switch (type) { |
| 2508 |
case CCS_DOMAINPOLICY: /* /proc/ccs/domain_policy */ |
| 2509 |
head->write = ccs_write_domain_policy; |
| 2510 |
head->read = ccs_read_domain_policy; |
| 2511 |
break; |
| 2512 |
case CCS_EXCEPTIONPOLICY: /* /proc/ccs/exception_policy */ |
| 2513 |
head->write = ccs_write_exception_policy; |
| 2514 |
head->read = ccs_read_exception_policy; |
| 2515 |
break; |
| 2516 |
#ifdef CONFIG_CCSECURITY_AUDIT |
| 2517 |
case CCS_GRANTLOG: /* /proc/ccs/grant_log */ |
| 2518 |
head->poll = ccs_poll_grant_log; |
| 2519 |
head->read = ccs_read_grant_log; |
| 2520 |
break; |
| 2521 |
case CCS_REJECTLOG: /* /proc/ccs/reject_log */ |
| 2522 |
head->poll = ccs_poll_reject_log; |
| 2523 |
head->read = ccs_read_reject_log; |
| 2524 |
break; |
| 2525 |
#endif |
| 2526 |
case CCS_SELFDOMAIN: /* /proc/ccs/self_domain */ |
| 2527 |
head->read = ccs_read_self_domain; |
| 2528 |
break; |
| 2529 |
case CCS_DOMAIN_STATUS: /* /proc/ccs/.domain_status */ |
| 2530 |
head->write = ccs_write_domain_profile; |
| 2531 |
head->read = ccs_read_domain_profile; |
| 2532 |
break; |
| 2533 |
case CCS_EXECUTE_HANDLER: /* /proc/ccs/.execute_handler */ |
| 2534 |
/* Allow execute_handler to read process's status. */ |
| 2535 |
if (!(current->ccs_flags & CCS_TASK_IS_EXECUTE_HANDLER)) { |
| 2536 |
kfree(head); |
| 2537 |
return -EPERM; |
| 2538 |
} |
| 2539 |
/* fall through */ |
| 2540 |
case CCS_PROCESS_STATUS: /* /proc/ccs/.process_status */ |
| 2541 |
head->write = ccs_write_pid; |
| 2542 |
head->read = ccs_read_pid; |
| 2543 |
break; |
| 2544 |
case CCS_VERSION: /* /proc/ccs/version */ |
| 2545 |
head->read = ccs_read_version; |
| 2546 |
head->readbuf_size = 128; |
| 2547 |
break; |
| 2548 |
case CCS_MEMINFO: /* /proc/ccs/meminfo */ |
| 2549 |
head->write = ccs_write_memory_quota; |
| 2550 |
head->read = ccs_read_memory_counter; |
| 2551 |
head->readbuf_size = 512; |
| 2552 |
break; |
| 2553 |
case CCS_PROFILE: /* /proc/ccs/profile */ |
| 2554 |
head->write = ccs_write_profile; |
| 2555 |
head->read = ccs_read_profile; |
| 2556 |
break; |
| 2557 |
case CCS_QUERY: /* /proc/ccs/query */ |
| 2558 |
head->poll = ccs_poll_query; |
| 2559 |
head->write = ccs_write_answer; |
| 2560 |
head->read = ccs_read_query; |
| 2561 |
break; |
| 2562 |
case CCS_MANAGER: /* /proc/ccs/manager */ |
| 2563 |
head->write = ccs_write_manager_policy; |
| 2564 |
head->read = ccs_read_manager_policy; |
| 2565 |
break; |
| 2566 |
} |
| 2567 |
if (!(file->f_mode & FMODE_READ)) { |
| 2568 |
/* |
| 2569 |
* No need to allocate read_buf since it is not opened |
| 2570 |
* for reading. |
| 2571 |
*/ |
| 2572 |
head->read = NULL; |
| 2573 |
head->poll = NULL; |
| 2574 |
} else if (!head->poll) { |
| 2575 |
/* Don't allocate read_buf for poll() access. */ |
| 2576 |
if (!head->readbuf_size) |
| 2577 |
head->readbuf_size = 4096; |
| 2578 |
head->read_buf = kzalloc(head->readbuf_size, GFP_KERNEL); |
| 2579 |
if (!head->read_buf) { |
| 2580 |
kfree(head); |
| 2581 |
return -ENOMEM; |
| 2582 |
} |
| 2583 |
} |
| 2584 |
if (!(file->f_mode & FMODE_WRITE)) { |
| 2585 |
/* |
| 2586 |
* No need to allocate write_buf since it is not opened |
| 2587 |
* for writing. |
| 2588 |
*/ |
| 2589 |
head->write = NULL; |
| 2590 |
} else if (head->write) { |
| 2591 |
head->writebuf_size = 4096; |
| 2592 |
head->write_buf = kzalloc(head->writebuf_size, GFP_KERNEL); |
| 2593 |
if (!head->write_buf) { |
| 2594 |
kfree(head->read_buf); |
| 2595 |
kfree(head); |
| 2596 |
return -ENOMEM; |
| 2597 |
} |
| 2598 |
} |
| 2599 |
if (type != CCS_QUERY && |
| 2600 |
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
| 2601 |
head->reader_idx = ccs_read_lock(); |
| 2602 |
file->private_data = head; |
| 2603 |
/* |
| 2604 |
* Call the handler now if the file is /proc/ccs/self_domain |
| 2605 |
* so that the user can use "cat < /proc/ccs/self_domain" to |
| 2606 |
* know the current process's domainname. |
| 2607 |
*/ |
| 2608 |
if (type == CCS_SELFDOMAIN) |
| 2609 |
ccs_read_control(file, NULL, 0); |
| 2610 |
/* |
| 2611 |
* If the file is /proc/ccs/query , increment the observer counter. |
| 2612 |
* The obserber counter is used by ccs_supervisor() to see if |
| 2613 |
* there is some process monitoring /proc/ccs/query. |
| 2614 |
*/ |
| 2615 |
else if (type == CCS_QUERY) |
| 2616 |
atomic_inc(&ccs_query_observers); |
| 2617 |
return 0; |
| 2618 |
} |
| 2619 |
|
| 2620 |
/** |
| 2621 |
* ccs_poll_control - poll() for /proc/ccs/ interface. |
| 2622 |
* |
| 2623 |
* @file: Pointer to "struct file". |
| 2624 |
* @wait: Pointer to "poll_table". |
| 2625 |
* |
| 2626 |
* Waits for read readiness. |
| 2627 |
* /proc/ccs/query is handled by /usr/sbin/ccs-queryd and |
| 2628 |
* /proc/ccs/grant_log and /proc/ccs/reject_log are handled by |
| 2629 |
* /usr/sbin/ccs-auditd. |
| 2630 |
*/ |
| 2631 |
int ccs_poll_control(struct file *file, poll_table *wait) |
| 2632 |
{ |
| 2633 |
struct ccs_io_buffer *head = file->private_data; |
| 2634 |
if (!head->poll) |
| 2635 |
return -ENOSYS; |
| 2636 |
return head->poll(file, wait); |
| 2637 |
} |
| 2638 |
|
| 2639 |
/** |
| 2640 |
* ccs_read_control - read() for /proc/ccs/ interface. |
| 2641 |
* |
| 2642 |
* @file: Pointer to "struct file". |
| 2643 |
* @buffer: Poiner to buffer to write to. |
| 2644 |
* @buffer_len: Size of @buffer. |
| 2645 |
* |
| 2646 |
* Returns bytes read on success, negative value otherwise. |
| 2647 |
*/ |
| 2648 |
int ccs_read_control(struct file *file, char __user *buffer, |
| 2649 |
const int buffer_len) |
| 2650 |
{ |
| 2651 |
int len = 0; |
| 2652 |
struct ccs_io_buffer *head = file->private_data; |
| 2653 |
char *cp; |
| 2654 |
if (!head->read) |
| 2655 |
return -ENOSYS; |
| 2656 |
if (!access_ok(VERIFY_WRITE, buffer, buffer_len)) |
| 2657 |
return -EFAULT; |
| 2658 |
if (mutex_lock_interruptible(&head->io_sem)) |
| 2659 |
return -EINTR; |
| 2660 |
while (1) { |
| 2661 |
/* Call the policy handler. */ |
| 2662 |
head->read(head); |
| 2663 |
/* Write to buffer. */ |
| 2664 |
len = head->read_avail; |
| 2665 |
if (len || head->poll || head->read_eof) |
| 2666 |
break; |
| 2667 |
len = head->readbuf_size * 2; |
| 2668 |
cp = kzalloc(len, GFP_KERNEL); |
| 2669 |
if (!cp) { |
| 2670 |
len = -ENOMEM; |
| 2671 |
goto out; |
| 2672 |
} |
| 2673 |
kfree(head->read_buf); |
| 2674 |
head->read_buf = cp; |
| 2675 |
head->readbuf_size = len; |
| 2676 |
} |
| 2677 |
if (len > buffer_len) |
| 2678 |
len = buffer_len; |
| 2679 |
if (!len) |
| 2680 |
goto out; |
| 2681 |
/* head->read_buf changes by some functions. */ |
| 2682 |
cp = head->read_buf; |
| 2683 |
if (copy_to_user(buffer, cp, len)) { |
| 2684 |
len = -EFAULT; |
| 2685 |
goto out; |
| 2686 |
} |
| 2687 |
head->read_avail -= len; |
| 2688 |
memmove(cp, cp + len, head->read_avail); |
| 2689 |
out: |
| 2690 |
mutex_unlock(&head->io_sem); |
| 2691 |
return len; |
| 2692 |
} |
| 2693 |
|
| 2694 |
/** |
| 2695 |
* ccs_write_control - write() for /proc/ccs/ interface. |
| 2696 |
* |
| 2697 |
* @file: Pointer to "struct file". |
| 2698 |
* @buffer: Pointer to buffer to read from. |
| 2699 |
* @buffer_len: Size of @buffer. |
| 2700 |
* |
| 2701 |
* Returns @buffer_len on success, negative value otherwise. |
| 2702 |
*/ |
| 2703 |
int ccs_write_control(struct file *file, const char __user *buffer, |
| 2704 |
const int buffer_len) |
| 2705 |
{ |
| 2706 |
struct ccs_io_buffer *head = file->private_data; |
| 2707 |
int error = buffer_len; |
| 2708 |
int avail_len = buffer_len; |
| 2709 |
char *cp0 = head->write_buf; |
| 2710 |
if (!head->write) |
| 2711 |
return -ENOSYS; |
| 2712 |
if (!access_ok(VERIFY_READ, buffer, buffer_len)) |
| 2713 |
return -EFAULT; |
| 2714 |
/* Don't allow updating policies by non manager programs. */ |
| 2715 |
if (head->write != ccs_write_pid && |
| 2716 |
head->write != ccs_write_domain_policy && |
| 2717 |
!ccs_is_policy_manager()) |
| 2718 |
return -EPERM; |
| 2719 |
if (mutex_lock_interruptible(&head->io_sem)) |
| 2720 |
return -EINTR; |
| 2721 |
/* Read a line and dispatch it to the policy handler. */ |
| 2722 |
while (avail_len > 0) { |
| 2723 |
char c; |
| 2724 |
if (head->write_avail >= head->writebuf_size - 1) { |
| 2725 |
const int len = head->writebuf_size * 2; |
| 2726 |
char *cp = kzalloc(len, GFP_KERNEL); |
| 2727 |
if (!cp) { |
| 2728 |
error = -ENOMEM; |
| 2729 |
break; |
| 2730 |
} |
| 2731 |
memmove(cp, cp0, head->write_avail); |
| 2732 |
kfree(cp0); |
| 2733 |
head->write_buf = cp; |
| 2734 |
cp0 = cp; |
| 2735 |
head->writebuf_size = len; |
| 2736 |
} |
| 2737 |
if (get_user(c, buffer)) { |
| 2738 |
error = -EFAULT; |
| 2739 |
break; |
| 2740 |
} |
| 2741 |
buffer++; |
| 2742 |
avail_len--; |
| 2743 |
cp0[head->write_avail++] = c; |
| 2744 |
if (c != '\n') |
| 2745 |
continue; |
| 2746 |
cp0[head->write_avail - 1] = '\0'; |
| 2747 |
head->write_avail = 0; |
| 2748 |
ccs_normalize_line(cp0); |
| 2749 |
head->write(head); |
| 2750 |
} |
| 2751 |
mutex_unlock(&head->io_sem); |
| 2752 |
return error; |
| 2753 |
} |
| 2754 |
|
| 2755 |
/** |
| 2756 |
* ccs_close_control - close() for /proc/ccs/ interface. |
| 2757 |
* |
| 2758 |
* @file: Pointer to "struct file". |
| 2759 |
* |
| 2760 |
* Releases memory and returns 0. |
| 2761 |
*/ |
| 2762 |
int ccs_close_control(struct file *file) |
| 2763 |
{ |
| 2764 |
struct ccs_io_buffer *head = file->private_data; |
| 2765 |
const bool is_write = head->write_buf != NULL; |
| 2766 |
const u8 type = head->type; |
| 2767 |
/* |
| 2768 |
* If the file is /proc/ccs/query , decrement the observer counter. |
| 2769 |
*/ |
| 2770 |
if (type == CCS_QUERY) |
| 2771 |
atomic_dec(&ccs_query_observers); |
| 2772 |
if (type != CCS_QUERY && |
| 2773 |
type != CCS_GRANTLOG && type != CCS_REJECTLOG) |
| 2774 |
ccs_read_unlock(head->reader_idx); |
| 2775 |
/* Release memory used for policy I/O. */ |
| 2776 |
kfree(head->read_buf); |
| 2777 |
head->read_buf = NULL; |
| 2778 |
kfree(head->write_buf); |
| 2779 |
head->write_buf = NULL; |
| 2780 |
kfree(head); |
| 2781 |
head = NULL; |
| 2782 |
file->private_data = NULL; |
| 2783 |
if (is_write) |
| 2784 |
ccs_run_gc(); |
| 2785 |
return 0; |
| 2786 |
} |
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