1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2017-2018 HUAWEI, Inc. 4 * https://www.huawei.com/ 5 * Copyright (C) 2021-2022, Alibaba Cloud 6 */ 7 #include <linux/security.h> 8 #include <linux/xxhash.h> 9 #include "xattr.h" 10 11 struct erofs_xattr_iter { 12 struct super_block *sb; 13 struct erofs_buf buf; 14 erofs_off_t pos; 15 void *kaddr; 16 17 char *buffer; 18 int buffer_size, buffer_ofs; 19 20 /* getxattr */ 21 int index, infix_len; 22 struct qstr name; 23 24 /* listxattr */ 25 struct dentry *dentry; 26 }; 27 28 static const char *erofs_xattr_prefix(unsigned int idx, struct dentry *dentry); 29 30 static int erofs_init_inode_xattrs(struct inode *inode) 31 { 32 struct erofs_buf buf = __EROFS_BUF_INITIALIZER; 33 struct erofs_inode *vi = EROFS_I(inode); 34 struct super_block *sb = inode->i_sb; 35 const struct erofs_xattr_ibody_header *ih; 36 __le32 *xattr_id; 37 erofs_off_t pos; 38 unsigned int i; 39 int ret = 0; 40 41 if (!vi->xattr_isize) 42 return -ENODATA; 43 44 /* the most case is that xattrs of this inode are initialized. */ 45 if (test_bit(EROFS_I_EA_INITED_BIT, &vi->flags)) { 46 /* 47 * paired with smp_mb() at the end of the function to ensure 48 * fields will only be observed after the bit is set. 49 */ 50 smp_mb(); 51 return 0; 52 } 53 if (wait_on_bit_lock(&vi->flags, EROFS_I_BL_XATTR_BIT, TASK_KILLABLE)) 54 return -ERESTARTSYS; 55 56 /* someone has initialized xattrs for us? */ 57 if (test_bit(EROFS_I_EA_INITED_BIT, &vi->flags)) 58 goto out_unlock; 59 60 /* 61 * bypass all xattr operations if ->xattr_isize is not greater than 62 * sizeof(struct erofs_xattr_ibody_header), in detail: 63 * 1) it is not enough to contain erofs_xattr_ibody_header then 64 * ->xattr_isize should be 0 (it means no xattr); 65 * 2) it is just to contain erofs_xattr_ibody_header, which is on-disk 66 * undefined right now (maybe use later with some new sb feature). 67 */ 68 if (vi->xattr_isize == sizeof(struct erofs_xattr_ibody_header)) { 69 erofs_err(sb, "xattr_isize %d of nid %llu is not supported yet", 70 vi->xattr_isize, vi->nid); 71 ret = -EOPNOTSUPP; 72 goto out_unlock; 73 } else if (vi->xattr_isize < sizeof(struct erofs_xattr_ibody_header)) { 74 erofs_err(sb, "bogus xattr ibody @ nid %llu", vi->nid); 75 DBG_BUGON(1); 76 ret = -EFSCORRUPTED; 77 goto out_unlock; 78 } 79 80 pos = erofs_iloc(inode) + vi->inode_isize; 81 ih = erofs_read_metabuf(&buf, sb, pos, erofs_inode_in_metabox(inode)); 82 if (IS_ERR(ih)) { 83 ret = PTR_ERR(ih); 84 goto out_unlock; 85 } 86 vi->xattr_name_filter = le32_to_cpu(ih->h_name_filter); 87 vi->xattr_shared_count = ih->h_shared_count; 88 vi->xattr_shared_xattrs = kmalloc_objs(uint, vi->xattr_shared_count); 89 if (!vi->xattr_shared_xattrs) { 90 erofs_put_metabuf(&buf); 91 ret = -ENOMEM; 92 goto out_unlock; 93 } 94 95 /* skip the ibody header and read the shared xattr array */ 96 pos += sizeof(struct erofs_xattr_ibody_header); 97 for (i = 0; i < vi->xattr_shared_count; ++i) { 98 xattr_id = erofs_bread(&buf, pos + i * sizeof(__le32), true); 99 if (IS_ERR(xattr_id)) { 100 kfree(vi->xattr_shared_xattrs); 101 vi->xattr_shared_xattrs = NULL; 102 ret = PTR_ERR(xattr_id); 103 goto out_unlock; 104 } 105 vi->xattr_shared_xattrs[i] = le32_to_cpu(*xattr_id); 106 } 107 erofs_put_metabuf(&buf); 108 109 /* paired with smp_mb() at the beginning of the function. */ 110 smp_mb(); 111 set_bit(EROFS_I_EA_INITED_BIT, &vi->flags); 112 out_unlock: 113 clear_and_wake_up_bit(EROFS_I_BL_XATTR_BIT, &vi->flags); 114 return ret; 115 } 116 117 static int erofs_xattr_copy_to_buffer(struct erofs_xattr_iter *it, 118 unsigned int len) 119 { 120 unsigned int slice, processed; 121 struct super_block *sb = it->sb; 122 123 for (processed = 0; processed < len; processed += slice) { 124 it->kaddr = erofs_bread(&it->buf, it->pos, true); 125 if (IS_ERR(it->kaddr)) 126 return PTR_ERR(it->kaddr); 127 128 slice = min_t(unsigned int, sb->s_blocksize - 129 erofs_blkoff(sb, it->pos), len - processed); 130 memcpy(it->buffer + it->buffer_ofs, it->kaddr, slice); 131 it->buffer_ofs += slice; 132 it->pos += slice; 133 } 134 return 0; 135 } 136 137 static int erofs_listxattr_foreach(struct erofs_xattr_iter *it) 138 { 139 struct erofs_xattr_entry entry; 140 unsigned int base_index, name_total, prefix_len, infix_len = 0; 141 const char *prefix, *infix = NULL; 142 int err; 143 144 /* 1. handle xattr entry */ 145 entry = *(struct erofs_xattr_entry *)it->kaddr; 146 it->pos += sizeof(struct erofs_xattr_entry); 147 148 base_index = entry.e_name_index; 149 if (entry.e_name_index & EROFS_XATTR_LONG_PREFIX) { 150 struct erofs_sb_info *sbi = EROFS_SB(it->sb); 151 struct erofs_xattr_prefix_item *pf = sbi->xattr_prefixes + 152 (entry.e_name_index & EROFS_XATTR_LONG_PREFIX_MASK); 153 154 if (pf >= sbi->xattr_prefixes + sbi->xattr_prefix_count) 155 return 0; 156 infix = pf->prefix->infix; 157 infix_len = pf->infix_len; 158 base_index = pf->prefix->base_index; 159 } 160 161 prefix = erofs_xattr_prefix(base_index, it->dentry); 162 if (!prefix) 163 return 0; 164 prefix_len = strlen(prefix); 165 name_total = prefix_len + infix_len + entry.e_name_len + 1; 166 167 if (!it->buffer) { 168 it->buffer_ofs += name_total; 169 return 0; 170 } 171 172 if (it->buffer_ofs + name_total > it->buffer_size) 173 return -ERANGE; 174 175 memcpy(it->buffer + it->buffer_ofs, prefix, prefix_len); 176 memcpy(it->buffer + it->buffer_ofs + prefix_len, infix, infix_len); 177 it->buffer_ofs += prefix_len + infix_len; 178 179 /* 2. handle xattr name */ 180 err = erofs_xattr_copy_to_buffer(it, entry.e_name_len); 181 if (err) 182 return err; 183 184 it->buffer[it->buffer_ofs++] = '\0'; 185 return 0; 186 } 187 188 static int erofs_getxattr_foreach(struct erofs_xattr_iter *it) 189 { 190 struct super_block *sb = it->sb; 191 struct erofs_xattr_entry entry; 192 unsigned int slice, processed, value_sz; 193 194 /* 1. handle xattr entry */ 195 entry = *(struct erofs_xattr_entry *)it->kaddr; 196 it->pos += sizeof(struct erofs_xattr_entry); 197 value_sz = le16_to_cpu(entry.e_value_size); 198 199 /* should also match the infix for long name prefixes */ 200 if (entry.e_name_index & EROFS_XATTR_LONG_PREFIX) { 201 struct erofs_sb_info *sbi = EROFS_SB(sb); 202 struct erofs_xattr_prefix_item *pf = sbi->xattr_prefixes + 203 (entry.e_name_index & EROFS_XATTR_LONG_PREFIX_MASK); 204 205 if (pf >= sbi->xattr_prefixes + sbi->xattr_prefix_count) 206 return -ENODATA; 207 208 if (it->index != pf->prefix->base_index || 209 it->name.len != entry.e_name_len + pf->infix_len) 210 return -ENODATA; 211 212 if (memcmp(it->name.name, pf->prefix->infix, pf->infix_len)) 213 return -ENODATA; 214 215 it->infix_len = pf->infix_len; 216 } else { 217 if (it->index != entry.e_name_index || 218 it->name.len != entry.e_name_len) 219 return -ENODATA; 220 221 it->infix_len = 0; 222 } 223 224 /* 2. handle xattr name */ 225 for (processed = 0; processed < entry.e_name_len; processed += slice) { 226 it->kaddr = erofs_bread(&it->buf, it->pos, true); 227 if (IS_ERR(it->kaddr)) 228 return PTR_ERR(it->kaddr); 229 230 slice = min_t(unsigned int, 231 sb->s_blocksize - erofs_blkoff(sb, it->pos), 232 entry.e_name_len - processed); 233 if (memcmp(it->name.name + it->infix_len + processed, 234 it->kaddr, slice)) 235 return -ENODATA; 236 it->pos += slice; 237 } 238 239 /* 3. handle xattr value */ 240 if (!it->buffer) { 241 it->buffer_ofs = value_sz; 242 return 0; 243 } 244 245 if (it->buffer_size < value_sz) 246 return -ERANGE; 247 248 return erofs_xattr_copy_to_buffer(it, value_sz); 249 } 250 251 static int erofs_xattr_iter_inline(struct erofs_xattr_iter *it, 252 struct inode *inode, bool getxattr) 253 { 254 struct erofs_inode *const vi = EROFS_I(inode); 255 unsigned int xattr_header_sz, remaining, entry_sz; 256 erofs_off_t next_pos; 257 int ret; 258 259 xattr_header_sz = sizeof(struct erofs_xattr_ibody_header) + 260 sizeof(u32) * vi->xattr_shared_count; 261 if (xattr_header_sz >= vi->xattr_isize) { 262 DBG_BUGON(xattr_header_sz > vi->xattr_isize); 263 return -ENODATA; 264 } 265 266 ret = erofs_init_metabuf(&it->buf, it->sb, erofs_inode_in_metabox(inode)); 267 if (ret) 268 return ret; 269 remaining = vi->xattr_isize - xattr_header_sz; 270 it->pos = erofs_iloc(inode) + vi->inode_isize + xattr_header_sz; 271 272 while (remaining) { 273 it->kaddr = erofs_bread(&it->buf, it->pos, true); 274 if (IS_ERR(it->kaddr)) 275 return PTR_ERR(it->kaddr); 276 277 entry_sz = erofs_xattr_entry_size(it->kaddr); 278 /* xattr on-disk corruption: xattr entry beyond xattr_isize */ 279 if (remaining < entry_sz) { 280 DBG_BUGON(1); 281 return -EFSCORRUPTED; 282 } 283 remaining -= entry_sz; 284 next_pos = it->pos + entry_sz; 285 286 if (getxattr) 287 ret = erofs_getxattr_foreach(it); 288 else 289 ret = erofs_listxattr_foreach(it); 290 if ((getxattr && ret != -ENODATA) || (!getxattr && ret)) 291 break; 292 293 it->pos = next_pos; 294 } 295 return ret; 296 } 297 298 static int erofs_xattr_iter_shared(struct erofs_xattr_iter *it, 299 struct inode *inode, bool getxattr) 300 { 301 struct erofs_inode *const vi = EROFS_I(inode); 302 struct super_block *const sb = it->sb; 303 struct erofs_sb_info *sbi = EROFS_SB(sb); 304 unsigned int i = 0; 305 int ret; 306 307 ret = erofs_init_metabuf(&it->buf, sb, 308 erofs_sb_has_shared_ea_in_metabox(sbi)); 309 if (ret) 310 return ret; 311 312 while (i < vi->xattr_shared_count) { 313 it->pos = erofs_pos(sb, sbi->xattr_blkaddr) + 314 vi->xattr_shared_xattrs[i++] * sizeof(__le32); 315 it->kaddr = erofs_bread(&it->buf, it->pos, true); 316 if (IS_ERR(it->kaddr)) 317 return PTR_ERR(it->kaddr); 318 319 if (getxattr) 320 ret = erofs_getxattr_foreach(it); 321 else 322 ret = erofs_listxattr_foreach(it); 323 if ((getxattr && ret != -ENODATA) || (!getxattr && ret)) 324 break; 325 } 326 return i ? ret : -ENODATA; 327 } 328 329 static int erofs_getxattr(struct inode *inode, int index, const char *name, 330 void *buffer, size_t buffer_size) 331 { 332 int ret; 333 unsigned int hashbit; 334 struct erofs_xattr_iter it; 335 struct erofs_inode *vi = EROFS_I(inode); 336 struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb); 337 338 if (!name) 339 return -EINVAL; 340 341 ret = erofs_init_inode_xattrs(inode); 342 if (ret) 343 return ret; 344 345 /* reserved flag is non-zero if there's any change of on-disk format */ 346 if (erofs_sb_has_xattr_filter(sbi) && !sbi->xattr_filter_reserved) { 347 hashbit = xxh32(name, strlen(name), 348 EROFS_XATTR_FILTER_SEED + index); 349 hashbit &= EROFS_XATTR_FILTER_BITS - 1; 350 if (vi->xattr_name_filter & (1U << hashbit)) 351 return -ENODATA; 352 } 353 354 it.index = index; 355 it.name = QSTR(name); 356 if (it.name.len > EROFS_NAME_LEN) 357 return -ERANGE; 358 359 it.sb = inode->i_sb; 360 it.buf = __EROFS_BUF_INITIALIZER; 361 it.buffer = buffer; 362 it.buffer_size = buffer_size; 363 it.buffer_ofs = 0; 364 365 ret = erofs_xattr_iter_inline(&it, inode, true); 366 if (ret == -ENODATA) 367 ret = erofs_xattr_iter_shared(&it, inode, true); 368 erofs_put_metabuf(&it.buf); 369 return ret ? ret : it.buffer_ofs; 370 } 371 372 ssize_t erofs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) 373 { 374 int ret; 375 struct erofs_xattr_iter it; 376 struct inode *inode = d_inode(dentry); 377 378 ret = erofs_init_inode_xattrs(inode); 379 if (ret == -ENODATA) 380 return 0; 381 if (ret) 382 return ret; 383 384 it.sb = dentry->d_sb; 385 it.buf = __EROFS_BUF_INITIALIZER; 386 it.dentry = dentry; 387 it.buffer = buffer; 388 it.buffer_size = buffer_size; 389 it.buffer_ofs = 0; 390 391 ret = erofs_xattr_iter_inline(&it, inode, false); 392 if (!ret || ret == -ENODATA) 393 ret = erofs_xattr_iter_shared(&it, inode, false); 394 if (ret == -ENODATA) 395 ret = 0; 396 erofs_put_metabuf(&it.buf); 397 return ret ? ret : it.buffer_ofs; 398 } 399 400 static bool erofs_xattr_user_list(struct dentry *dentry) 401 { 402 return test_opt(&EROFS_SB(dentry->d_sb)->opt, XATTR_USER); 403 } 404 405 static bool erofs_xattr_trusted_list(struct dentry *dentry) 406 { 407 return capable(CAP_SYS_ADMIN); 408 } 409 410 static int erofs_xattr_generic_get(const struct xattr_handler *handler, 411 struct dentry *unused, struct inode *inode, 412 const char *name, void *buffer, size_t size) 413 { 414 if (handler->flags == EROFS_XATTR_INDEX_USER && 415 !test_opt(&EROFS_I_SB(inode)->opt, XATTR_USER)) 416 return -EOPNOTSUPP; 417 418 return erofs_getxattr(inode, handler->flags, name, buffer, size); 419 } 420 421 static const struct xattr_handler erofs_xattr_user_handler = { 422 .prefix = XATTR_USER_PREFIX, 423 .flags = EROFS_XATTR_INDEX_USER, 424 .list = erofs_xattr_user_list, 425 .get = erofs_xattr_generic_get, 426 }; 427 428 static const struct xattr_handler erofs_xattr_trusted_handler = { 429 .prefix = XATTR_TRUSTED_PREFIX, 430 .flags = EROFS_XATTR_INDEX_TRUSTED, 431 .list = erofs_xattr_trusted_list, 432 .get = erofs_xattr_generic_get, 433 }; 434 435 #ifdef CONFIG_EROFS_FS_SECURITY 436 static const struct xattr_handler erofs_xattr_security_handler = { 437 .prefix = XATTR_SECURITY_PREFIX, 438 .flags = EROFS_XATTR_INDEX_SECURITY, 439 .get = erofs_xattr_generic_get, 440 }; 441 #endif 442 443 const struct xattr_handler * const erofs_xattr_handlers[] = { 444 &erofs_xattr_user_handler, 445 &erofs_xattr_trusted_handler, 446 #ifdef CONFIG_EROFS_FS_SECURITY 447 &erofs_xattr_security_handler, 448 #endif 449 NULL, 450 }; 451 452 static const char *erofs_xattr_prefix(unsigned int idx, struct dentry *dentry) 453 { 454 static const struct xattr_handler * const xattr_handler_map[] = { 455 [EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler, 456 #ifdef CONFIG_EROFS_FS_POSIX_ACL 457 [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access, 458 [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default, 459 #endif 460 [EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler, 461 #ifdef CONFIG_EROFS_FS_SECURITY 462 [EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler, 463 #endif 464 }; 465 const struct xattr_handler *handler = NULL; 466 467 if (idx && idx < ARRAY_SIZE(xattr_handler_map)) { 468 handler = xattr_handler_map[idx]; 469 if (xattr_handler_can_list(handler, dentry)) 470 return xattr_prefix(handler); 471 } 472 return NULL; 473 } 474 475 void erofs_xattr_prefixes_cleanup(struct super_block *sb) 476 { 477 struct erofs_sb_info *sbi = EROFS_SB(sb); 478 int i; 479 480 if (sbi->xattr_prefixes) { 481 for (i = 0; i < sbi->xattr_prefix_count; i++) 482 kfree(sbi->xattr_prefixes[i].prefix); 483 kfree(sbi->xattr_prefixes); 484 sbi->xattr_prefixes = NULL; 485 } 486 } 487 488 int erofs_xattr_prefixes_init(struct super_block *sb) 489 { 490 struct erofs_sb_info *sbi = EROFS_SB(sb); 491 struct erofs_buf buf = __EROFS_BUF_INITIALIZER; 492 erofs_off_t pos = (erofs_off_t)sbi->xattr_prefix_start << 2; 493 struct erofs_xattr_prefix_item *pfs; 494 int ret = 0, i, len; 495 bool plain = erofs_sb_has_plain_xattr_pfx(sbi); 496 497 if (!sbi->xattr_prefix_count) 498 return 0; 499 500 pfs = kzalloc_objs(*pfs, sbi->xattr_prefix_count); 501 if (!pfs) 502 return -ENOMEM; 503 504 if (!plain) { 505 if (erofs_sb_has_metabox(sbi)) 506 (void)erofs_init_metabuf(&buf, sb, true); 507 else if (sbi->packed_inode) 508 buf.mapping = sbi->packed_inode->i_mapping; 509 else 510 plain = true; 511 } 512 if (plain) 513 (void)erofs_init_metabuf(&buf, sb, false); 514 515 for (i = 0; i < sbi->xattr_prefix_count; i++) { 516 void *ptr = erofs_read_metadata(sb, &buf, &pos, &len); 517 518 if (IS_ERR(ptr)) { 519 ret = PTR_ERR(ptr); 520 break; 521 } else if (len < sizeof(*pfs->prefix) || 522 len > EROFS_NAME_LEN + sizeof(*pfs->prefix)) { 523 kfree(ptr); 524 ret = -EFSCORRUPTED; 525 break; 526 } 527 pfs[i].prefix = ptr; 528 pfs[i].infix_len = len - sizeof(struct erofs_xattr_long_prefix); 529 } 530 531 erofs_put_metabuf(&buf); 532 if (!ret && erofs_sb_has_ishare_xattrs(sbi)) { 533 struct erofs_xattr_prefix_item *pf = pfs + sbi->ishare_xattr_prefix_id; 534 struct erofs_xattr_long_prefix *newpfx; 535 536 newpfx = krealloc(pf->prefix, 537 sizeof(*newpfx) + pf->infix_len + 1, GFP_KERNEL); 538 if (newpfx) { 539 newpfx->infix[pf->infix_len] = '\0'; 540 pf->prefix = newpfx; 541 } else { 542 ret = -ENOMEM; 543 } 544 } 545 sbi->xattr_prefixes = pfs; 546 if (ret) 547 erofs_xattr_prefixes_cleanup(sb); 548 return ret; 549 } 550 551 #ifdef CONFIG_EROFS_FS_POSIX_ACL 552 struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu) 553 { 554 struct posix_acl *acl; 555 int prefix, rc; 556 char *value = NULL; 557 558 if (rcu) 559 return ERR_PTR(-ECHILD); 560 561 switch (type) { 562 case ACL_TYPE_ACCESS: 563 prefix = EROFS_XATTR_INDEX_POSIX_ACL_ACCESS; 564 break; 565 case ACL_TYPE_DEFAULT: 566 prefix = EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT; 567 break; 568 default: 569 return ERR_PTR(-EINVAL); 570 } 571 572 rc = erofs_getxattr(inode, prefix, "", NULL, 0); 573 if (rc > 0) { 574 value = kmalloc(rc, GFP_KERNEL); 575 if (!value) 576 return ERR_PTR(-ENOMEM); 577 rc = erofs_getxattr(inode, prefix, "", value, rc); 578 } 579 580 if (rc == -ENODATA) 581 acl = NULL; 582 else if (rc < 0) 583 acl = ERR_PTR(rc); 584 else 585 acl = posix_acl_from_xattr(&init_user_ns, value, rc); 586 kfree(value); 587 return acl; 588 } 589 590 bool erofs_inode_has_noacl(struct inode *inode, void *kaddr, unsigned int ofs) 591 { 592 static const unsigned int bitmask = 593 BIT(21) | /* system.posix_acl_default */ 594 BIT(30); /* system.posix_acl_access */ 595 struct erofs_sb_info *sbi = EROFS_I_SB(inode); 596 const struct erofs_xattr_ibody_header *ih = kaddr + ofs; 597 598 if (EROFS_I(inode)->xattr_isize < sizeof(*ih)) 599 return true; 600 601 if (erofs_sb_has_xattr_filter(sbi) && !sbi->xattr_filter_reserved && 602 !check_add_overflow(ofs, sizeof(*ih), &ofs) && 603 ofs <= i_blocksize(inode)) { 604 if ((le32_to_cpu(ih->h_name_filter) & bitmask) == bitmask) 605 return true; 606 } 607 return false; 608 } 609 #endif 610 611 #ifdef CONFIG_EROFS_FS_PAGE_CACHE_SHARE 612 int erofs_xattr_fill_inode_fingerprint(struct erofs_inode_fingerprint *fp, 613 struct inode *inode, const char *domain_id) 614 { 615 struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb); 616 struct erofs_xattr_prefix_item *prefix; 617 const char *infix; 618 int valuelen, base_index; 619 620 if (!test_opt(&sbi->opt, INODE_SHARE)) 621 return -EOPNOTSUPP; 622 if (!sbi->xattr_prefixes) 623 return -EINVAL; 624 prefix = sbi->xattr_prefixes + sbi->ishare_xattr_prefix_id; 625 infix = prefix->prefix->infix; 626 base_index = prefix->prefix->base_index; 627 valuelen = erofs_getxattr(inode, base_index, infix, NULL, 0); 628 if (valuelen <= 0 || valuelen > (1 << sbi->blkszbits)) 629 return -EFSCORRUPTED; 630 fp->size = valuelen + (domain_id ? strlen(domain_id) : 0); 631 fp->opaque = kmalloc(fp->size, GFP_KERNEL); 632 if (!fp->opaque) 633 return -ENOMEM; 634 if (valuelen != erofs_getxattr(inode, base_index, infix, 635 fp->opaque, valuelen)) { 636 kfree(fp->opaque); 637 fp->opaque = NULL; 638 return -EFSCORRUPTED; 639 } 640 memcpy(fp->opaque + valuelen, domain_id, fp->size - valuelen); 641 return 0; 642 } 643 #endif 644