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1 : : // SPDX-License-Identifier: GPL-2.0-only
2 : : /*
3 : : * This contains encryption functions for per-file encryption.
4 : : *
5 : : * Copyright (C) 2015, Google, Inc.
6 : : * Copyright (C) 2015, Motorola Mobility
7 : : *
8 : : * Written by Michael Halcrow, 2014.
9 : : *
10 : : * Filename encryption additions
11 : : * Uday Savagaonkar, 2014
12 : : * Encryption policy handling additions
13 : : * Ildar Muslukhov, 2014
14 : : * Add fscrypt_pullback_bio_page()
15 : : * Jaegeuk Kim, 2015.
16 : : *
17 : : * This has not yet undergone a rigorous security audit.
18 : : *
19 : : * The usage of AES-XTS should conform to recommendations in NIST
20 : : * Special Publication 800-38E and IEEE P1619/D16.
21 : : */
22 : :
23 : : #include <linux/pagemap.h>
24 : : #include <linux/mempool.h>
25 : : #include <linux/module.h>
26 : : #include <linux/scatterlist.h>
27 : : #include <linux/ratelimit.h>
28 : : #include <linux/dcache.h>
29 : : #include <linux/namei.h>
30 : : #include <crypto/aes.h>
31 : : #include <crypto/skcipher.h>
32 : : #include "fscrypt_private.h"
33 : :
34 : : static unsigned int num_prealloc_crypto_pages = 32;
35 : : static unsigned int num_prealloc_crypto_ctxs = 128;
36 : :
37 : : module_param(num_prealloc_crypto_pages, uint, 0444);
38 : : MODULE_PARM_DESC(num_prealloc_crypto_pages,
39 : : "Number of crypto pages to preallocate");
40 : : module_param(num_prealloc_crypto_ctxs, uint, 0444);
41 : : MODULE_PARM_DESC(num_prealloc_crypto_ctxs,
42 : : "Number of crypto contexts to preallocate");
43 : :
44 : : static mempool_t *fscrypt_bounce_page_pool = NULL;
45 : :
46 : : static LIST_HEAD(fscrypt_free_ctxs);
47 : : static DEFINE_SPINLOCK(fscrypt_ctx_lock);
48 : :
49 : : static struct workqueue_struct *fscrypt_read_workqueue;
50 : : static DEFINE_MUTEX(fscrypt_init_mutex);
51 : :
52 : : static struct kmem_cache *fscrypt_ctx_cachep;
53 : : struct kmem_cache *fscrypt_info_cachep;
54 : :
55 : 0 : void fscrypt_enqueue_decrypt_work(struct work_struct *work)
56 : : {
57 : 0 : queue_work(fscrypt_read_workqueue, work);
58 : 0 : }
59 : : EXPORT_SYMBOL(fscrypt_enqueue_decrypt_work);
60 : :
61 : : /**
62 : : * fscrypt_release_ctx() - Release a decryption context
63 : : * @ctx: The decryption context to release.
64 : : *
65 : : * If the decryption context was allocated from the pre-allocated pool, return
66 : : * it to that pool. Else, free it.
67 : : */
68 : 0 : void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
69 : : {
70 : : unsigned long flags;
71 : :
72 [ # # ]: 0 : if (ctx->flags & FS_CTX_REQUIRES_FREE_ENCRYPT_FL) {
73 : 0 : kmem_cache_free(fscrypt_ctx_cachep, ctx);
74 : : } else {
75 : 0 : spin_lock_irqsave(&fscrypt_ctx_lock, flags);
76 : 0 : list_add(&ctx->free_list, &fscrypt_free_ctxs);
77 : : spin_unlock_irqrestore(&fscrypt_ctx_lock, flags);
78 : : }
79 : 0 : }
80 : : EXPORT_SYMBOL(fscrypt_release_ctx);
81 : :
82 : : /**
83 : : * fscrypt_get_ctx() - Get a decryption context
84 : : * @gfp_flags: The gfp flag for memory allocation
85 : : *
86 : : * Allocate and initialize a decryption context.
87 : : *
88 : : * Return: A new decryption context on success; an ERR_PTR() otherwise.
89 : : */
90 : 0 : struct fscrypt_ctx *fscrypt_get_ctx(gfp_t gfp_flags)
91 : : {
92 : : struct fscrypt_ctx *ctx;
93 : : unsigned long flags;
94 : :
95 : : /*
96 : : * First try getting a ctx from the free list so that we don't have to
97 : : * call into the slab allocator.
98 : : */
99 : 0 : spin_lock_irqsave(&fscrypt_ctx_lock, flags);
100 [ # # ]: 0 : ctx = list_first_entry_or_null(&fscrypt_free_ctxs,
101 : : struct fscrypt_ctx, free_list);
102 [ # # ]: 0 : if (ctx)
103 : : list_del(&ctx->free_list);
104 : : spin_unlock_irqrestore(&fscrypt_ctx_lock, flags);
105 [ # # ]: 0 : if (!ctx) {
106 : 0 : ctx = kmem_cache_zalloc(fscrypt_ctx_cachep, gfp_flags);
107 [ # # ]: 0 : if (!ctx)
108 : : return ERR_PTR(-ENOMEM);
109 : 0 : ctx->flags |= FS_CTX_REQUIRES_FREE_ENCRYPT_FL;
110 : : } else {
111 : 0 : ctx->flags &= ~FS_CTX_REQUIRES_FREE_ENCRYPT_FL;
112 : : }
113 : 0 : return ctx;
114 : : }
115 : : EXPORT_SYMBOL(fscrypt_get_ctx);
116 : :
117 : 0 : struct page *fscrypt_alloc_bounce_page(gfp_t gfp_flags)
118 : : {
119 : 0 : return mempool_alloc(fscrypt_bounce_page_pool, gfp_flags);
120 : : }
121 : :
122 : : /**
123 : : * fscrypt_free_bounce_page() - free a ciphertext bounce page
124 : : *
125 : : * Free a bounce page that was allocated by fscrypt_encrypt_pagecache_blocks(),
126 : : * or by fscrypt_alloc_bounce_page() directly.
127 : : */
128 : 104090 : void fscrypt_free_bounce_page(struct page *bounce_page)
129 : : {
130 [ - + ]: 104090 : if (!bounce_page)
131 : 104090 : return;
132 : 0 : set_page_private(bounce_page, (unsigned long)NULL);
133 : : ClearPagePrivate(bounce_page);
134 : 0 : mempool_free(bounce_page, fscrypt_bounce_page_pool);
135 : : }
136 : : EXPORT_SYMBOL(fscrypt_free_bounce_page);
137 : :
138 : 0 : void fscrypt_generate_iv(union fscrypt_iv *iv, u64 lblk_num,
139 : : const struct fscrypt_info *ci)
140 : : {
141 : 0 : memset(iv, 0, ci->ci_mode->ivsize);
142 : 0 : iv->lblk_num = cpu_to_le64(lblk_num);
143 : :
144 [ # # ]: 0 : if (fscrypt_is_direct_key_policy(&ci->ci_policy))
145 : 0 : memcpy(iv->nonce, ci->ci_nonce, FS_KEY_DERIVATION_NONCE_SIZE);
146 : :
147 [ # # ]: 0 : if (ci->ci_essiv_tfm != NULL)
148 : 0 : crypto_cipher_encrypt_one(ci->ci_essiv_tfm, iv->raw, iv->raw);
149 : 0 : }
150 : :
151 : : /* Encrypt or decrypt a single filesystem block of file contents */
152 : 0 : int fscrypt_crypt_block(const struct inode *inode, fscrypt_direction_t rw,
153 : : u64 lblk_num, struct page *src_page,
154 : : struct page *dest_page, unsigned int len,
155 : : unsigned int offs, gfp_t gfp_flags)
156 : : {
157 : : union fscrypt_iv iv;
158 : : struct skcipher_request *req = NULL;
159 : 0 : DECLARE_CRYPTO_WAIT(wait);
160 : : struct scatterlist dst, src;
161 : 0 : struct fscrypt_info *ci = inode->i_crypt_info;
162 : 0 : struct crypto_skcipher *tfm = ci->ci_ctfm;
163 : : int res = 0;
164 : :
165 [ # # # # : 0 : if (WARN_ON_ONCE(len <= 0))
# # ]
166 : : return -EINVAL;
167 [ # # # # : 0 : if (WARN_ON_ONCE(len % FS_CRYPTO_BLOCK_SIZE != 0))
# # ]
168 : : return -EINVAL;
169 : :
170 : 0 : fscrypt_generate_iv(&iv, lblk_num, ci);
171 : :
172 : 0 : req = skcipher_request_alloc(tfm, gfp_flags);
173 [ # # ]: 0 : if (!req)
174 : : return -ENOMEM;
175 : :
176 : : skcipher_request_set_callback(
177 : : req, CRYPTO_TFM_REQ_MAY_BACKLOG | CRYPTO_TFM_REQ_MAY_SLEEP,
178 : : crypto_req_done, &wait);
179 : :
180 : 0 : sg_init_table(&dst, 1);
181 : : sg_set_page(&dst, dest_page, len, offs);
182 : 0 : sg_init_table(&src, 1);
183 : : sg_set_page(&src, src_page, len, offs);
184 : : skcipher_request_set_crypt(req, &src, &dst, len, &iv);
185 [ # # ]: 0 : if (rw == FS_DECRYPT)
186 : 0 : res = crypto_wait_req(crypto_skcipher_decrypt(req), &wait);
187 : : else
188 : 0 : res = crypto_wait_req(crypto_skcipher_encrypt(req), &wait);
189 : : skcipher_request_free(req);
190 [ # # ]: 0 : if (res) {
191 [ # # ]: 0 : fscrypt_err(inode, "%scryption failed for block %llu: %d",
192 : : (rw == FS_DECRYPT ? "De" : "En"), lblk_num, res);
193 : 0 : return res;
194 : : }
195 : : return 0;
196 : : }
197 : :
198 : : /**
199 : : * fscrypt_encrypt_pagecache_blocks() - Encrypt filesystem blocks from a pagecache page
200 : : * @page: The locked pagecache page containing the block(s) to encrypt
201 : : * @len: Total size of the block(s) to encrypt. Must be a nonzero
202 : : * multiple of the filesystem's block size.
203 : : * @offs: Byte offset within @page of the first block to encrypt. Must be
204 : : * a multiple of the filesystem's block size.
205 : : * @gfp_flags: Memory allocation flags
206 : : *
207 : : * A new bounce page is allocated, and the specified block(s) are encrypted into
208 : : * it. In the bounce page, the ciphertext block(s) will be located at the same
209 : : * offsets at which the plaintext block(s) were located in the source page; any
210 : : * other parts of the bounce page will be left uninitialized. However, normally
211 : : * blocksize == PAGE_SIZE and the whole page is encrypted at once.
212 : : *
213 : : * This is for use by the filesystem's ->writepages() method.
214 : : *
215 : : * Return: the new encrypted bounce page on success; an ERR_PTR() on failure
216 : : */
217 : 0 : struct page *fscrypt_encrypt_pagecache_blocks(struct page *page,
218 : : unsigned int len,
219 : : unsigned int offs,
220 : : gfp_t gfp_flags)
221 : :
222 : : {
223 : 0 : const struct inode *inode = page->mapping->host;
224 : 0 : const unsigned int blockbits = inode->i_blkbits;
225 : 0 : const unsigned int blocksize = 1 << blockbits;
226 : : struct page *ciphertext_page;
227 : 0 : u64 lblk_num = ((u64)page->index << (PAGE_SHIFT - blockbits)) +
228 : 0 : (offs >> blockbits);
229 : : unsigned int i;
230 : : int err;
231 : :
232 [ # # # # : 0 : if (WARN_ON_ONCE(!PageLocked(page)))
# # ]
233 : : return ERR_PTR(-EINVAL);
234 : :
235 [ # # # # : 0 : if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize)))
# # # # #
# ]
236 : : return ERR_PTR(-EINVAL);
237 : :
238 : : ciphertext_page = fscrypt_alloc_bounce_page(gfp_flags);
239 [ # # ]: 0 : if (!ciphertext_page)
240 : : return ERR_PTR(-ENOMEM);
241 : :
242 [ # # ]: 0 : for (i = offs; i < offs + len; i += blocksize, lblk_num++) {
243 : 0 : err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num,
244 : : page, ciphertext_page,
245 : : blocksize, i, gfp_flags);
246 [ # # ]: 0 : if (err) {
247 : 0 : fscrypt_free_bounce_page(ciphertext_page);
248 : 0 : return ERR_PTR(err);
249 : : }
250 : : }
251 : : SetPagePrivate(ciphertext_page);
252 : 0 : set_page_private(ciphertext_page, (unsigned long)page);
253 : 0 : return ciphertext_page;
254 : : }
255 : : EXPORT_SYMBOL(fscrypt_encrypt_pagecache_blocks);
256 : :
257 : : /**
258 : : * fscrypt_encrypt_block_inplace() - Encrypt a filesystem block in-place
259 : : * @inode: The inode to which this block belongs
260 : : * @page: The page containing the block to encrypt
261 : : * @len: Size of block to encrypt. Doesn't need to be a multiple of the
262 : : * fs block size, but must be a multiple of FS_CRYPTO_BLOCK_SIZE.
263 : : * @offs: Byte offset within @page at which the block to encrypt begins
264 : : * @lblk_num: Filesystem logical block number of the block, i.e. the 0-based
265 : : * number of the block within the file
266 : : * @gfp_flags: Memory allocation flags
267 : : *
268 : : * Encrypt a possibly-compressed filesystem block that is located in an
269 : : * arbitrary page, not necessarily in the original pagecache page. The @inode
270 : : * and @lblk_num must be specified, as they can't be determined from @page.
271 : : *
272 : : * Return: 0 on success; -errno on failure
273 : : */
274 : 0 : int fscrypt_encrypt_block_inplace(const struct inode *inode, struct page *page,
275 : : unsigned int len, unsigned int offs,
276 : : u64 lblk_num, gfp_t gfp_flags)
277 : : {
278 : 0 : return fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num, page, page,
279 : : len, offs, gfp_flags);
280 : : }
281 : : EXPORT_SYMBOL(fscrypt_encrypt_block_inplace);
282 : :
283 : : /**
284 : : * fscrypt_decrypt_pagecache_blocks() - Decrypt filesystem blocks in a pagecache page
285 : : * @page: The locked pagecache page containing the block(s) to decrypt
286 : : * @len: Total size of the block(s) to decrypt. Must be a nonzero
287 : : * multiple of the filesystem's block size.
288 : : * @offs: Byte offset within @page of the first block to decrypt. Must be
289 : : * a multiple of the filesystem's block size.
290 : : *
291 : : * The specified block(s) are decrypted in-place within the pagecache page,
292 : : * which must still be locked and not uptodate. Normally, blocksize ==
293 : : * PAGE_SIZE and the whole page is decrypted at once.
294 : : *
295 : : * This is for use by the filesystem's ->readpages() method.
296 : : *
297 : : * Return: 0 on success; -errno on failure
298 : : */
299 : 0 : int fscrypt_decrypt_pagecache_blocks(struct page *page, unsigned int len,
300 : : unsigned int offs)
301 : : {
302 : 0 : const struct inode *inode = page->mapping->host;
303 : 0 : const unsigned int blockbits = inode->i_blkbits;
304 : 0 : const unsigned int blocksize = 1 << blockbits;
305 : 0 : u64 lblk_num = ((u64)page->index << (PAGE_SHIFT - blockbits)) +
306 : 0 : (offs >> blockbits);
307 : : unsigned int i;
308 : : int err;
309 : :
310 [ # # # # : 0 : if (WARN_ON_ONCE(!PageLocked(page)))
# # ]
311 : : return -EINVAL;
312 : :
313 [ # # # # : 0 : if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize)))
# # # # #
# ]
314 : : return -EINVAL;
315 : :
316 [ # # ]: 0 : for (i = offs; i < offs + len; i += blocksize, lblk_num++) {
317 : 0 : err = fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page,
318 : : page, blocksize, i, GFP_NOFS);
319 [ # # ]: 0 : if (err)
320 : 0 : return err;
321 : : }
322 : : return 0;
323 : : }
324 : : EXPORT_SYMBOL(fscrypt_decrypt_pagecache_blocks);
325 : :
326 : : /**
327 : : * fscrypt_decrypt_block_inplace() - Decrypt a filesystem block in-place
328 : : * @inode: The inode to which this block belongs
329 : : * @page: The page containing the block to decrypt
330 : : * @len: Size of block to decrypt. Doesn't need to be a multiple of the
331 : : * fs block size, but must be a multiple of FS_CRYPTO_BLOCK_SIZE.
332 : : * @offs: Byte offset within @page at which the block to decrypt begins
333 : : * @lblk_num: Filesystem logical block number of the block, i.e. the 0-based
334 : : * number of the block within the file
335 : : *
336 : : * Decrypt a possibly-compressed filesystem block that is located in an
337 : : * arbitrary page, not necessarily in the original pagecache page. The @inode
338 : : * and @lblk_num must be specified, as they can't be determined from @page.
339 : : *
340 : : * Return: 0 on success; -errno on failure
341 : : */
342 : 0 : int fscrypt_decrypt_block_inplace(const struct inode *inode, struct page *page,
343 : : unsigned int len, unsigned int offs,
344 : : u64 lblk_num)
345 : : {
346 : 0 : return fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page, page,
347 : : len, offs, GFP_NOFS);
348 : : }
349 : : EXPORT_SYMBOL(fscrypt_decrypt_block_inplace);
350 : :
351 : : /*
352 : : * Validate dentries in encrypted directories to make sure we aren't potentially
353 : : * caching stale dentries after a key has been added.
354 : : */
355 : 0 : static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
356 : : {
357 : : struct dentry *dir;
358 : : int err;
359 : : int valid;
360 : :
361 : : /*
362 : : * Plaintext names are always valid, since fscrypt doesn't support
363 : : * reverting to ciphertext names without evicting the directory's inode
364 : : * -- which implies eviction of the dentries in the directory.
365 : : */
366 [ # # ]: 0 : if (!(dentry->d_flags & DCACHE_ENCRYPTED_NAME))
367 : : return 1;
368 : :
369 : : /*
370 : : * Ciphertext name; valid if the directory's key is still unavailable.
371 : : *
372 : : * Although fscrypt forbids rename() on ciphertext names, we still must
373 : : * use dget_parent() here rather than use ->d_parent directly. That's
374 : : * because a corrupted fs image may contain directory hard links, which
375 : : * the VFS handles by moving the directory's dentry tree in the dcache
376 : : * each time ->lookup() finds the directory and it already has a dentry
377 : : * elsewhere. Thus ->d_parent can be changing, and we must safely grab
378 : : * a reference to some ->d_parent to prevent it from being freed.
379 : : */
380 : :
381 [ # # ]: 0 : if (flags & LOOKUP_RCU)
382 : : return -ECHILD;
383 : :
384 : 0 : dir = dget_parent(dentry);
385 : 0 : err = fscrypt_get_encryption_info(d_inode(dir));
386 : 0 : valid = !fscrypt_has_encryption_key(d_inode(dir));
387 : 0 : dput(dir);
388 : :
389 [ # # ]: 0 : if (err < 0)
390 : : return err;
391 : :
392 : 0 : return valid;
393 : : }
394 : :
395 : : const struct dentry_operations fscrypt_d_ops = {
396 : : .d_revalidate = fscrypt_d_revalidate,
397 : : };
398 : :
399 : 0 : static void fscrypt_destroy(void)
400 : : {
401 : : struct fscrypt_ctx *pos, *n;
402 : :
403 [ # # ]: 0 : list_for_each_entry_safe(pos, n, &fscrypt_free_ctxs, free_list)
404 : 0 : kmem_cache_free(fscrypt_ctx_cachep, pos);
405 : : INIT_LIST_HEAD(&fscrypt_free_ctxs);
406 : 0 : mempool_destroy(fscrypt_bounce_page_pool);
407 : 0 : fscrypt_bounce_page_pool = NULL;
408 : 0 : }
409 : :
410 : : /**
411 : : * fscrypt_initialize() - allocate major buffers for fs encryption.
412 : : * @cop_flags: fscrypt operations flags
413 : : *
414 : : * We only call this when we start accessing encrypted files, since it
415 : : * results in memory getting allocated that wouldn't otherwise be used.
416 : : *
417 : : * Return: Zero on success, non-zero otherwise.
418 : : */
419 : 0 : int fscrypt_initialize(unsigned int cop_flags)
420 : : {
421 : : int i, res = -ENOMEM;
422 : :
423 : : /* No need to allocate a bounce page pool if this FS won't use it. */
424 [ # # ]: 0 : if (cop_flags & FS_CFLG_OWN_PAGES)
425 : : return 0;
426 : :
427 : 0 : mutex_lock(&fscrypt_init_mutex);
428 [ # # ]: 0 : if (fscrypt_bounce_page_pool)
429 : : goto already_initialized;
430 : :
431 [ # # ]: 0 : for (i = 0; i < num_prealloc_crypto_ctxs; i++) {
432 : : struct fscrypt_ctx *ctx;
433 : :
434 : 0 : ctx = kmem_cache_zalloc(fscrypt_ctx_cachep, GFP_NOFS);
435 [ # # ]: 0 : if (!ctx)
436 : : goto fail;
437 : 0 : list_add(&ctx->free_list, &fscrypt_free_ctxs);
438 : : }
439 : :
440 : 0 : fscrypt_bounce_page_pool =
441 : 0 : mempool_create_page_pool(num_prealloc_crypto_pages, 0);
442 [ # # ]: 0 : if (!fscrypt_bounce_page_pool)
443 : : goto fail;
444 : :
445 : : already_initialized:
446 : 0 : mutex_unlock(&fscrypt_init_mutex);
447 : 0 : return 0;
448 : : fail:
449 : 0 : fscrypt_destroy();
450 : 0 : mutex_unlock(&fscrypt_init_mutex);
451 : 0 : return res;
452 : : }
453 : :
454 : 0 : void fscrypt_msg(const struct inode *inode, const char *level,
455 : : const char *fmt, ...)
456 : : {
457 : : static DEFINE_RATELIMIT_STATE(rs, DEFAULT_RATELIMIT_INTERVAL,
458 : : DEFAULT_RATELIMIT_BURST);
459 : : struct va_format vaf;
460 : : va_list args;
461 : :
462 [ # # ]: 0 : if (!__ratelimit(&rs))
463 : 0 : return;
464 : :
465 : 0 : va_start(args, fmt);
466 : 0 : vaf.fmt = fmt;
467 : 0 : vaf.va = &args;
468 [ # # ]: 0 : if (inode)
469 : 0 : printk("%sfscrypt (%s, inode %lu): %pV\n",
470 : 0 : level, inode->i_sb->s_id, inode->i_ino, &vaf);
471 : : else
472 : 0 : printk("%sfscrypt: %pV\n", level, &vaf);
473 : 0 : va_end(args);
474 : : }
475 : :
476 : : /**
477 : : * fscrypt_init() - Set up for fs encryption.
478 : : */
479 : 404 : static int __init fscrypt_init(void)
480 : : {
481 : : int err = -ENOMEM;
482 : :
483 : : /*
484 : : * Use an unbound workqueue to allow bios to be decrypted in parallel
485 : : * even when they happen to complete on the same CPU. This sacrifices
486 : : * locality, but it's worthwhile since decryption is CPU-intensive.
487 : : *
488 : : * Also use a high-priority workqueue to prioritize decryption work,
489 : : * which blocks reads from completing, over regular application tasks.
490 : : */
491 : 404 : fscrypt_read_workqueue = alloc_workqueue("fscrypt_read_queue",
492 : : WQ_UNBOUND | WQ_HIGHPRI,
493 : : num_online_cpus());
494 [ + - ]: 404 : if (!fscrypt_read_workqueue)
495 : : goto fail;
496 : :
497 : 404 : fscrypt_ctx_cachep = KMEM_CACHE(fscrypt_ctx, SLAB_RECLAIM_ACCOUNT);
498 [ + - ]: 404 : if (!fscrypt_ctx_cachep)
499 : : goto fail_free_queue;
500 : :
501 : 404 : fscrypt_info_cachep = KMEM_CACHE(fscrypt_info, SLAB_RECLAIM_ACCOUNT);
502 [ + - ]: 404 : if (!fscrypt_info_cachep)
503 : : goto fail_free_ctx;
504 : :
505 : 404 : err = fscrypt_init_keyring();
506 [ - + ]: 404 : if (err)
507 : : goto fail_free_info;
508 : :
509 : : return 0;
510 : :
511 : : fail_free_info:
512 : 0 : kmem_cache_destroy(fscrypt_info_cachep);
513 : : fail_free_ctx:
514 : 0 : kmem_cache_destroy(fscrypt_ctx_cachep);
515 : : fail_free_queue:
516 : 0 : destroy_workqueue(fscrypt_read_workqueue);
517 : : fail:
518 : 0 : return err;
519 : : }
520 : : late_initcall(fscrypt_init)
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