Commit | Line | Data |
---|---|---|
45051539 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1ab8e268 | 2 | /* |
88b4a07e MH |
3 | * eCryptfs: Linux filesystem encryption layer |
4 | * | |
f66e883e | 5 | * Copyright (C) 2004-2008 International Business Machines Corp. |
88b4a07e | 6 | * Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com> |
f8e48a84 | 7 | * Tyler Hicks <code@tyhicks.com> |
88b4a07e | 8 | */ |
e8edc6e0 | 9 | #include <linux/sched.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
6a3fd92e MH |
11 | #include <linux/user_namespace.h> |
12 | #include <linux/nsproxy.h> | |
88b4a07e MH |
13 | #include "ecryptfs_kernel.h" |
14 | ||
dd2a3b7a MH |
15 | static LIST_HEAD(ecryptfs_msg_ctx_free_list); |
16 | static LIST_HEAD(ecryptfs_msg_ctx_alloc_list); | |
724fa862 | 17 | static DEFINE_MUTEX(ecryptfs_msg_ctx_lists_mux); |
88b4a07e | 18 | |
f66e883e | 19 | static struct hlist_head *ecryptfs_daemon_hash; |
724fa862 | 20 | DEFINE_MUTEX(ecryptfs_daemon_hash_mux); |
a6f80fb7 | 21 | static int ecryptfs_hash_bits; |
2ecaf55d | 22 | #define ecryptfs_current_euid_hash(uid) \ |
cdf8c58a | 23 | hash_long((unsigned long)from_kuid(&init_user_ns, current_euid()), ecryptfs_hash_bits) |
88b4a07e | 24 | |
f66e883e | 25 | static u32 ecryptfs_msg_counter; |
dd2a3b7a | 26 | static struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr; |
88b4a07e MH |
27 | |
28 | /** | |
29 | * ecryptfs_acquire_free_msg_ctx | |
30 | * @msg_ctx: The context that was acquired from the free list | |
31 | * | |
32 | * Acquires a context element from the free list and locks the mutex | |
f66e883e MH |
33 | * on the context. Sets the msg_ctx task to current. Returns zero on |
34 | * success; non-zero on error or upon failure to acquire a free | |
35 | * context element. Must be called with ecryptfs_msg_ctx_lists_mux | |
36 | * held. | |
88b4a07e MH |
37 | */ |
38 | static int ecryptfs_acquire_free_msg_ctx(struct ecryptfs_msg_ctx **msg_ctx) | |
39 | { | |
40 | struct list_head *p; | |
41 | int rc; | |
42 | ||
43 | if (list_empty(&ecryptfs_msg_ctx_free_list)) { | |
f66e883e MH |
44 | printk(KERN_WARNING "%s: The eCryptfs free " |
45 | "context list is empty. It may be helpful to " | |
46 | "specify the ecryptfs_message_buf_len " | |
47 | "parameter to be greater than the current " | |
48 | "value of [%d]\n", __func__, ecryptfs_message_buf_len); | |
88b4a07e MH |
49 | rc = -ENOMEM; |
50 | goto out; | |
51 | } | |
52 | list_for_each(p, &ecryptfs_msg_ctx_free_list) { | |
53 | *msg_ctx = list_entry(p, struct ecryptfs_msg_ctx, node); | |
54 | if (mutex_trylock(&(*msg_ctx)->mux)) { | |
55 | (*msg_ctx)->task = current; | |
56 | rc = 0; | |
57 | goto out; | |
58 | } | |
59 | } | |
60 | rc = -ENOMEM; | |
61 | out: | |
62 | return rc; | |
63 | } | |
64 | ||
65 | /** | |
66 | * ecryptfs_msg_ctx_free_to_alloc | |
67 | * @msg_ctx: The context to move from the free list to the alloc list | |
68 | * | |
f66e883e | 69 | * Must be called with ecryptfs_msg_ctx_lists_mux held. |
88b4a07e MH |
70 | */ |
71 | static void ecryptfs_msg_ctx_free_to_alloc(struct ecryptfs_msg_ctx *msg_ctx) | |
72 | { | |
73 | list_move(&msg_ctx->node, &ecryptfs_msg_ctx_alloc_list); | |
74 | msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_PENDING; | |
75 | msg_ctx->counter = ++ecryptfs_msg_counter; | |
76 | } | |
77 | ||
78 | /** | |
79 | * ecryptfs_msg_ctx_alloc_to_free | |
80 | * @msg_ctx: The context to move from the alloc list to the free list | |
81 | * | |
f66e883e | 82 | * Must be called with ecryptfs_msg_ctx_lists_mux held. |
88b4a07e | 83 | */ |
f66e883e | 84 | void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx) |
88b4a07e MH |
85 | { |
86 | list_move(&(msg_ctx->node), &ecryptfs_msg_ctx_free_list); | |
1101d586 | 87 | kfree(msg_ctx->msg); |
f66e883e | 88 | msg_ctx->msg = NULL; |
88b4a07e MH |
89 | msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_FREE; |
90 | } | |
91 | ||
92 | /** | |
f66e883e | 93 | * ecryptfs_find_daemon_by_euid |
f66e883e | 94 | * @daemon: If return value is zero, points to the desired daemon pointer |
88b4a07e | 95 | * |
f66e883e MH |
96 | * Must be called with ecryptfs_daemon_hash_mux held. |
97 | * | |
2ecaf55d | 98 | * Search the hash list for the current effective user id. |
f66e883e MH |
99 | * |
100 | * Returns zero if the user id exists in the list; non-zero otherwise. | |
88b4a07e | 101 | */ |
2ecaf55d | 102 | int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon) |
88b4a07e | 103 | { |
88b4a07e MH |
104 | int rc; |
105 | ||
b67bfe0d | 106 | hlist_for_each_entry(*daemon, |
2ecaf55d TH |
107 | &ecryptfs_daemon_hash[ecryptfs_current_euid_hash()], |
108 | euid_chain) { | |
cdf8c58a | 109 | if (uid_eq((*daemon)->file->f_cred->euid, current_euid())) { |
88b4a07e MH |
110 | rc = 0; |
111 | goto out; | |
112 | } | |
113 | } | |
114 | rc = -EINVAL; | |
115 | out: | |
116 | return rc; | |
117 | } | |
118 | ||
f66e883e MH |
119 | /** |
120 | * ecryptfs_spawn_daemon - Create and initialize a new daemon struct | |
121 | * @daemon: Pointer to set to newly allocated daemon struct | |
2ecaf55d | 122 | * @file: File used when opening /dev/ecryptfs |
f66e883e MH |
123 | * |
124 | * Must be called ceremoniously while in possession of | |
125 | * ecryptfs_sacred_daemon_hash_mux | |
126 | * | |
127 | * Returns zero on success; non-zero otherwise | |
128 | */ | |
129 | int | |
2ecaf55d | 130 | ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file) |
f66e883e MH |
131 | { |
132 | int rc = 0; | |
133 | ||
134 | (*daemon) = kzalloc(sizeof(**daemon), GFP_KERNEL); | |
135 | if (!(*daemon)) { | |
136 | rc = -ENOMEM; | |
f66e883e MH |
137 | goto out; |
138 | } | |
2ecaf55d | 139 | (*daemon)->file = file; |
f66e883e MH |
140 | mutex_init(&(*daemon)->mux); |
141 | INIT_LIST_HEAD(&(*daemon)->msg_ctx_out_queue); | |
142 | init_waitqueue_head(&(*daemon)->wait); | |
143 | (*daemon)->num_queued_msg_ctx = 0; | |
144 | hlist_add_head(&(*daemon)->euid_chain, | |
2ecaf55d | 145 | &ecryptfs_daemon_hash[ecryptfs_current_euid_hash()]); |
f66e883e | 146 | out: |
88b4a07e MH |
147 | return rc; |
148 | } | |
149 | ||
1ab8e268 | 150 | /* |
f66e883e MH |
151 | * ecryptfs_exorcise_daemon - Destroy the daemon struct |
152 | * | |
153 | * Must be called ceremoniously while in possession of | |
154 | * ecryptfs_daemon_hash_mux and the daemon's own mux. | |
155 | */ | |
156 | int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon) | |
157 | { | |
158 | struct ecryptfs_msg_ctx *msg_ctx, *msg_ctx_tmp; | |
159 | int rc = 0; | |
160 | ||
161 | mutex_lock(&daemon->mux); | |
162 | if ((daemon->flags & ECRYPTFS_DAEMON_IN_READ) | |
163 | || (daemon->flags & ECRYPTFS_DAEMON_IN_POLL)) { | |
164 | rc = -EBUSY; | |
f66e883e MH |
165 | mutex_unlock(&daemon->mux); |
166 | goto out; | |
167 | } | |
168 | list_for_each_entry_safe(msg_ctx, msg_ctx_tmp, | |
169 | &daemon->msg_ctx_out_queue, daemon_out_list) { | |
170 | list_del(&msg_ctx->daemon_out_list); | |
171 | daemon->num_queued_msg_ctx--; | |
172 | printk(KERN_WARNING "%s: Warning: dropping message that is in " | |
173 | "the out queue of a dying daemon\n", __func__); | |
174 | ecryptfs_msg_ctx_alloc_to_free(msg_ctx); | |
175 | } | |
176 | hlist_del(&daemon->euid_chain); | |
f66e883e | 177 | mutex_unlock(&daemon->mux); |
453431a5 | 178 | kfree_sensitive(daemon); |
f66e883e | 179 | out: |
88b4a07e MH |
180 | return rc; |
181 | } | |
182 | ||
88b4a07e | 183 | /** |
1ab8e268 LJ |
184 | * ecryptfs_process_response |
185 | * @daemon: eCryptfs daemon object | |
88b4a07e | 186 | * @msg: The ecryptfs message received; the caller should sanity check |
f66e883e | 187 | * msg->data_len and free the memory |
f66e883e MH |
188 | * @seq: The sequence number of the message; must match the sequence |
189 | * number for the existing message context waiting for this | |
190 | * response | |
191 | * | |
192 | * Processes a response message after sending an operation request to | |
193 | * userspace. Some other process is awaiting this response. Before | |
194 | * sending out its first communications, the other process allocated a | |
195 | * msg_ctx from the ecryptfs_msg_ctx_arr at a particular index. The | |
196 | * response message contains this index so that we can copy over the | |
197 | * response message into the msg_ctx that the process holds a | |
198 | * reference to. The other process is going to wake up, check to see | |
199 | * that msg_ctx->state == ECRYPTFS_MSG_CTX_STATE_DONE, and then | |
200 | * proceed to read off and process the response message. Returns zero | |
201 | * upon delivery to desired context element; non-zero upon delivery | |
202 | * failure or error. | |
88b4a07e | 203 | * |
f66e883e | 204 | * Returns zero on success; non-zero otherwise |
88b4a07e | 205 | */ |
2ecaf55d TH |
206 | int ecryptfs_process_response(struct ecryptfs_daemon *daemon, |
207 | struct ecryptfs_message *msg, u32 seq) | |
88b4a07e | 208 | { |
88b4a07e | 209 | struct ecryptfs_msg_ctx *msg_ctx; |
f66e883e | 210 | size_t msg_size; |
88b4a07e MH |
211 | int rc; |
212 | ||
213 | if (msg->index >= ecryptfs_message_buf_len) { | |
214 | rc = -EINVAL; | |
f66e883e MH |
215 | printk(KERN_ERR "%s: Attempt to reference " |
216 | "context buffer at index [%d]; maximum " | |
217 | "allowable is [%d]\n", __func__, msg->index, | |
218 | (ecryptfs_message_buf_len - 1)); | |
88b4a07e MH |
219 | goto out; |
220 | } | |
221 | msg_ctx = &ecryptfs_msg_ctx_arr[msg->index]; | |
222 | mutex_lock(&msg_ctx->mux); | |
88b4a07e MH |
223 | if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_PENDING) { |
224 | rc = -EINVAL; | |
f66e883e MH |
225 | printk(KERN_WARNING "%s: Desired context element is not " |
226 | "pending a response\n", __func__); | |
88b4a07e MH |
227 | goto unlock; |
228 | } else if (msg_ctx->counter != seq) { | |
229 | rc = -EINVAL; | |
f66e883e MH |
230 | printk(KERN_WARNING "%s: Invalid message sequence; " |
231 | "expected [%d]; received [%d]\n", __func__, | |
232 | msg_ctx->counter, seq); | |
88b4a07e MH |
233 | goto unlock; |
234 | } | |
f66e883e | 235 | msg_size = (sizeof(*msg) + msg->data_len); |
fc8b14d3 | 236 | msg_ctx->msg = kmemdup(msg, msg_size, GFP_KERNEL); |
88b4a07e MH |
237 | if (!msg_ctx->msg) { |
238 | rc = -ENOMEM; | |
88b4a07e MH |
239 | goto unlock; |
240 | } | |
88b4a07e | 241 | msg_ctx->state = ECRYPTFS_MSG_CTX_STATE_DONE; |
88b4a07e | 242 | wake_up_process(msg_ctx->task); |
2ecaf55d | 243 | rc = 0; |
88b4a07e MH |
244 | unlock: |
245 | mutex_unlock(&msg_ctx->mux); | |
246 | out: | |
247 | return rc; | |
248 | } | |
249 | ||
250 | /** | |
f66e883e | 251 | * ecryptfs_send_message_locked |
88b4a07e MH |
252 | * @data: The data to send |
253 | * @data_len: The length of data | |
1ab8e268 | 254 | * @msg_type: Type of message |
88b4a07e | 255 | * @msg_ctx: The message context allocated for the send |
f66e883e MH |
256 | * |
257 | * Must be called with ecryptfs_daemon_hash_mux held. | |
258 | * | |
259 | * Returns zero on success; non-zero otherwise | |
88b4a07e | 260 | */ |
f66e883e | 261 | static int |
624ae528 TH |
262 | ecryptfs_send_message_locked(char *data, int data_len, u8 msg_type, |
263 | struct ecryptfs_msg_ctx **msg_ctx) | |
88b4a07e | 264 | { |
f66e883e | 265 | struct ecryptfs_daemon *daemon; |
88b4a07e MH |
266 | int rc; |
267 | ||
2ecaf55d | 268 | rc = ecryptfs_find_daemon_by_euid(&daemon); |
1111eae9 | 269 | if (rc) { |
88b4a07e | 270 | rc = -ENOTCONN; |
88b4a07e MH |
271 | goto out; |
272 | } | |
88b4a07e MH |
273 | mutex_lock(&ecryptfs_msg_ctx_lists_mux); |
274 | rc = ecryptfs_acquire_free_msg_ctx(msg_ctx); | |
275 | if (rc) { | |
276 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
f66e883e MH |
277 | printk(KERN_WARNING "%s: Could not claim a free " |
278 | "context element\n", __func__); | |
88b4a07e MH |
279 | goto out; |
280 | } | |
281 | ecryptfs_msg_ctx_free_to_alloc(*msg_ctx); | |
282 | mutex_unlock(&(*msg_ctx)->mux); | |
283 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
624ae528 TH |
284 | rc = ecryptfs_send_miscdev(data, data_len, *msg_ctx, msg_type, 0, |
285 | daemon); | |
f66e883e MH |
286 | if (rc) |
287 | printk(KERN_ERR "%s: Error attempting to send message to " | |
288 | "userspace daemon; rc = [%d]\n", __func__, rc); | |
88b4a07e MH |
289 | out: |
290 | return rc; | |
291 | } | |
292 | ||
f66e883e MH |
293 | /** |
294 | * ecryptfs_send_message | |
f66e883e MH |
295 | * @data: The data to send |
296 | * @data_len: The length of data | |
297 | * @msg_ctx: The message context allocated for the send | |
298 | * | |
299 | * Grabs ecryptfs_daemon_hash_mux. | |
300 | * | |
301 | * Returns zero on success; non-zero otherwise | |
302 | */ | |
624ae528 | 303 | int ecryptfs_send_message(char *data, int data_len, |
f66e883e MH |
304 | struct ecryptfs_msg_ctx **msg_ctx) |
305 | { | |
306 | int rc; | |
307 | ||
308 | mutex_lock(&ecryptfs_daemon_hash_mux); | |
624ae528 TH |
309 | rc = ecryptfs_send_message_locked(data, data_len, ECRYPTFS_MSG_REQUEST, |
310 | msg_ctx); | |
f66e883e MH |
311 | mutex_unlock(&ecryptfs_daemon_hash_mux); |
312 | return rc; | |
313 | } | |
314 | ||
88b4a07e MH |
315 | /** |
316 | * ecryptfs_wait_for_response | |
317 | * @msg_ctx: The context that was assigned when sending a message | |
318 | * @msg: The incoming message from userspace; not set if rc != 0 | |
319 | * | |
320 | * Sleeps until awaken by ecryptfs_receive_message or until the amount | |
321 | * of time exceeds ecryptfs_message_wait_timeout. If zero is | |
322 | * returned, msg will point to a valid message from userspace; a | |
323 | * non-zero value is returned upon failure to receive a message or an | |
f66e883e | 324 | * error occurs. Callee must free @msg on success. |
88b4a07e MH |
325 | */ |
326 | int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, | |
327 | struct ecryptfs_message **msg) | |
328 | { | |
329 | signed long timeout = ecryptfs_message_wait_timeout * HZ; | |
330 | int rc = 0; | |
331 | ||
332 | sleep: | |
333 | timeout = schedule_timeout_interruptible(timeout); | |
334 | mutex_lock(&ecryptfs_msg_ctx_lists_mux); | |
335 | mutex_lock(&msg_ctx->mux); | |
336 | if (msg_ctx->state != ECRYPTFS_MSG_CTX_STATE_DONE) { | |
337 | if (timeout) { | |
338 | mutex_unlock(&msg_ctx->mux); | |
339 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
340 | goto sleep; | |
341 | } | |
342 | rc = -ENOMSG; | |
343 | } else { | |
344 | *msg = msg_ctx->msg; | |
345 | msg_ctx->msg = NULL; | |
346 | } | |
347 | ecryptfs_msg_ctx_alloc_to_free(msg_ctx); | |
348 | mutex_unlock(&msg_ctx->mux); | |
349 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
350 | return rc; | |
351 | } | |
352 | ||
7371a382 | 353 | int __init ecryptfs_init_messaging(void) |
88b4a07e MH |
354 | { |
355 | int i; | |
356 | int rc = 0; | |
357 | ||
358 | if (ecryptfs_number_of_users > ECRYPTFS_MAX_NUM_USERS) { | |
359 | ecryptfs_number_of_users = ECRYPTFS_MAX_NUM_USERS; | |
f66e883e MH |
360 | printk(KERN_WARNING "%s: Specified number of users is " |
361 | "too large, defaulting to [%d] users\n", __func__, | |
362 | ecryptfs_number_of_users); | |
88b4a07e | 363 | } |
f66e883e | 364 | mutex_lock(&ecryptfs_daemon_hash_mux); |
a6f80fb7 AO |
365 | ecryptfs_hash_bits = 1; |
366 | while (ecryptfs_number_of_users >> ecryptfs_hash_bits) | |
367 | ecryptfs_hash_bits++; | |
f66e883e | 368 | ecryptfs_daemon_hash = kmalloc((sizeof(struct hlist_head) |
a6f80fb7 AO |
369 | * (1 << ecryptfs_hash_bits)), |
370 | GFP_KERNEL); | |
f66e883e | 371 | if (!ecryptfs_daemon_hash) { |
88b4a07e | 372 | rc = -ENOMEM; |
f66e883e | 373 | mutex_unlock(&ecryptfs_daemon_hash_mux); |
88b4a07e MH |
374 | goto out; |
375 | } | |
a6f80fb7 | 376 | for (i = 0; i < (1 << ecryptfs_hash_bits); i++) |
f66e883e MH |
377 | INIT_HLIST_HEAD(&ecryptfs_daemon_hash[i]); |
378 | mutex_unlock(&ecryptfs_daemon_hash_mux); | |
88b4a07e | 379 | ecryptfs_msg_ctx_arr = kmalloc((sizeof(struct ecryptfs_msg_ctx) |
f66e883e MH |
380 | * ecryptfs_message_buf_len), |
381 | GFP_KERNEL); | |
88b4a07e | 382 | if (!ecryptfs_msg_ctx_arr) { |
b4a81b87 | 383 | kfree(ecryptfs_daemon_hash); |
88b4a07e | 384 | rc = -ENOMEM; |
88b4a07e MH |
385 | goto out; |
386 | } | |
88b4a07e MH |
387 | mutex_lock(&ecryptfs_msg_ctx_lists_mux); |
388 | ecryptfs_msg_counter = 0; | |
389 | for (i = 0; i < ecryptfs_message_buf_len; i++) { | |
390 | INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr[i].node); | |
f66e883e | 391 | INIT_LIST_HEAD(&ecryptfs_msg_ctx_arr[i].daemon_out_list); |
88b4a07e MH |
392 | mutex_init(&ecryptfs_msg_ctx_arr[i].mux); |
393 | mutex_lock(&ecryptfs_msg_ctx_arr[i].mux); | |
394 | ecryptfs_msg_ctx_arr[i].index = i; | |
395 | ecryptfs_msg_ctx_arr[i].state = ECRYPTFS_MSG_CTX_STATE_FREE; | |
396 | ecryptfs_msg_ctx_arr[i].counter = 0; | |
397 | ecryptfs_msg_ctx_arr[i].task = NULL; | |
398 | ecryptfs_msg_ctx_arr[i].msg = NULL; | |
399 | list_add_tail(&ecryptfs_msg_ctx_arr[i].node, | |
400 | &ecryptfs_msg_ctx_free_list); | |
401 | mutex_unlock(&ecryptfs_msg_ctx_arr[i].mux); | |
402 | } | |
403 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
624ae528 TH |
404 | rc = ecryptfs_init_ecryptfs_miscdev(); |
405 | if (rc) | |
406 | ecryptfs_release_messaging(); | |
88b4a07e MH |
407 | out: |
408 | return rc; | |
409 | } | |
410 | ||
624ae528 | 411 | void ecryptfs_release_messaging(void) |
88b4a07e MH |
412 | { |
413 | if (ecryptfs_msg_ctx_arr) { | |
414 | int i; | |
415 | ||
416 | mutex_lock(&ecryptfs_msg_ctx_lists_mux); | |
417 | for (i = 0; i < ecryptfs_message_buf_len; i++) { | |
418 | mutex_lock(&ecryptfs_msg_ctx_arr[i].mux); | |
3db593e8 | 419 | kfree(ecryptfs_msg_ctx_arr[i].msg); |
88b4a07e MH |
420 | mutex_unlock(&ecryptfs_msg_ctx_arr[i].mux); |
421 | } | |
422 | kfree(ecryptfs_msg_ctx_arr); | |
423 | mutex_unlock(&ecryptfs_msg_ctx_lists_mux); | |
424 | } | |
f66e883e | 425 | if (ecryptfs_daemon_hash) { |
f66e883e | 426 | struct ecryptfs_daemon *daemon; |
db86be3a | 427 | struct hlist_node *n; |
88b4a07e MH |
428 | int i; |
429 | ||
f66e883e | 430 | mutex_lock(&ecryptfs_daemon_hash_mux); |
a6f80fb7 | 431 | for (i = 0; i < (1 << ecryptfs_hash_bits); i++) { |
f66e883e MH |
432 | int rc; |
433 | ||
db86be3a DC |
434 | hlist_for_each_entry_safe(daemon, n, |
435 | &ecryptfs_daemon_hash[i], | |
436 | euid_chain) { | |
f66e883e MH |
437 | rc = ecryptfs_exorcise_daemon(daemon); |
438 | if (rc) | |
439 | printk(KERN_ERR "%s: Error whilst " | |
440 | "attempting to destroy daemon; " | |
441 | "rc = [%d]. Dazed and confused, " | |
442 | "but trying to continue.\n", | |
443 | __func__, rc); | |
88b4a07e MH |
444 | } |
445 | } | |
f66e883e MH |
446 | kfree(ecryptfs_daemon_hash); |
447 | mutex_unlock(&ecryptfs_daemon_hash_mux); | |
88b4a07e | 448 | } |
624ae528 | 449 | ecryptfs_destroy_ecryptfs_miscdev(); |
88b4a07e MH |
450 | return; |
451 | } |