1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 * Copyright (c) 2020, 2022 Linaro Limited 5 */ 6 7 #include <config.h> 8 #include <crypto/crypto.h> 9 #include <kernel/mutex.h> 10 #include <kernel/tee_misc.h> 11 #include <kernel/tee_ta_manager.h> 12 #include <kernel/ts_manager.h> 13 #include <kernel/user_access.h> 14 #include <memtag.h> 15 #include <mm/vm.h> 16 #include <string.h> 17 #include <tee_api_defines_extensions.h> 18 #include <tee_api_defines.h> 19 #include <tee/tee_fs.h> 20 #include <tee/tee_obj.h> 21 #include <tee/tee_pobj.h> 22 #include <tee/tee_svc_cryp.h> 23 #include <tee/tee_svc.h> 24 #include <tee/tee_svc_storage.h> 25 #include <trace.h> 26 27 /* Header of GP formated secure storage files */ 28 struct tee_svc_storage_head { 29 uint32_t attr_size; 30 uint32_t objectSize; 31 uint32_t maxObjectSize; 32 uint32_t objectUsage; 33 uint32_t objectType; 34 uint32_t have_attrs; 35 }; 36 37 struct tee_storage_enum { 38 TAILQ_ENTRY(tee_storage_enum) link; 39 struct tee_fs_dir *dir; 40 const struct tee_file_operations *fops; 41 }; 42 43 static TEE_Result tee_svc_storage_get_enum(struct user_ta_ctx *utc, 44 vaddr_t enum_id, 45 struct tee_storage_enum **e_out) 46 { 47 struct tee_storage_enum *e; 48 49 TAILQ_FOREACH(e, &utc->storage_enums, link) { 50 if (enum_id == (vaddr_t)e) { 51 *e_out = e; 52 return TEE_SUCCESS; 53 } 54 } 55 return TEE_ERROR_BAD_PARAMETERS; 56 } 57 58 static TEE_Result tee_svc_close_enum(struct user_ta_ctx *utc, 59 struct tee_storage_enum *e) 60 { 61 if (e == NULL || utc == NULL) 62 return TEE_ERROR_BAD_PARAMETERS; 63 64 TAILQ_REMOVE(&utc->storage_enums, e, link); 65 66 if (e->fops) 67 e->fops->closedir(e->dir); 68 69 e->dir = NULL; 70 e->fops = NULL; 71 72 free(e); 73 74 return TEE_SUCCESS; 75 } 76 77 static void remove_corrupt_obj(struct user_ta_ctx *utc, struct tee_obj *o) 78 { 79 o->pobj->fops->remove(o->pobj); 80 if (!(utc->ta_ctx.flags & TA_FLAG_DONT_CLOSE_HANDLE_ON_CORRUPT_OBJECT)) 81 tee_obj_close(utc, o); 82 } 83 84 static TEE_Result tee_svc_storage_read_head(struct tee_obj *o) 85 { 86 TEE_Result res = TEE_SUCCESS; 87 size_t bytes; 88 struct tee_svc_storage_head head; 89 const struct tee_file_operations *fops = o->pobj->fops; 90 void *attr = NULL; 91 size_t size; 92 size_t tmp = 0; 93 94 assert(!o->fh); 95 res = fops->open(o->pobj, &size, &o->fh); 96 if (res != TEE_SUCCESS) 97 goto exit; 98 99 /* read head */ 100 bytes = sizeof(struct tee_svc_storage_head); 101 res = fops->read(o->fh, 0, &head, NULL, &bytes); 102 if (res != TEE_SUCCESS) { 103 if (res == TEE_ERROR_CORRUPT_OBJECT) 104 EMSG("Head corrupt"); 105 goto exit; 106 } 107 108 if (ADD_OVERFLOW(sizeof(head), head.attr_size, &tmp)) { 109 res = TEE_ERROR_OVERFLOW; 110 goto exit; 111 } 112 if (tmp > size) { 113 res = TEE_ERROR_CORRUPT_OBJECT; 114 goto exit; 115 } 116 117 if (bytes != sizeof(struct tee_svc_storage_head)) { 118 res = TEE_ERROR_BAD_FORMAT; 119 goto exit; 120 } 121 122 res = tee_obj_set_type(o, head.objectType, head.maxObjectSize); 123 if (res != TEE_SUCCESS) 124 goto exit; 125 126 o->ds_pos = tmp; 127 128 if (head.attr_size) { 129 attr = malloc(head.attr_size); 130 if (!attr) { 131 res = TEE_ERROR_OUT_OF_MEMORY; 132 goto exit; 133 } 134 135 /* read meta */ 136 bytes = head.attr_size; 137 res = fops->read(o->fh, sizeof(struct tee_svc_storage_head), 138 attr, NULL, &bytes); 139 if (res == TEE_ERROR_OUT_OF_MEMORY) 140 goto exit; 141 if (res != TEE_SUCCESS || bytes != head.attr_size) 142 res = TEE_ERROR_CORRUPT_OBJECT; 143 if (res) 144 goto exit; 145 } 146 147 res = tee_obj_attr_from_binary(o, attr, head.attr_size); 148 if (res != TEE_SUCCESS) 149 goto exit; 150 151 o->info.dataSize = size - sizeof(head) - head.attr_size; 152 o->info.objectSize = head.objectSize; 153 o->info.objectUsage = head.objectUsage; 154 o->info.objectType = head.objectType; 155 o->have_attrs = head.have_attrs; 156 157 exit: 158 free(attr); 159 160 return res; 161 } 162 163 TEE_Result syscall_storage_obj_open(unsigned long storage_id, void *object_id, 164 size_t object_id_len, unsigned long flags, 165 uint32_t *obj) 166 { 167 const unsigned long valid_flags = TEE_DATA_FLAG_ACCESS_READ | 168 TEE_DATA_FLAG_ACCESS_WRITE | 169 TEE_DATA_FLAG_ACCESS_WRITE_META | 170 TEE_DATA_FLAG_SHARE_READ | 171 TEE_DATA_FLAG_SHARE_WRITE; 172 const struct tee_file_operations *fops = 173 tee_svc_storage_file_ops(storage_id); 174 struct ts_session *sess = ts_get_current_session(); 175 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 176 TEE_Result res = TEE_SUCCESS; 177 struct tee_pobj *po = NULL; 178 struct tee_obj *o = NULL; 179 void *oid_bbuf = NULL; 180 181 if (flags & ~valid_flags) 182 return TEE_ERROR_BAD_PARAMETERS; 183 184 if (!fops) { 185 res = TEE_ERROR_ITEM_NOT_FOUND; 186 goto exit; 187 } 188 189 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) { 190 res = TEE_ERROR_BAD_PARAMETERS; 191 goto exit; 192 } 193 194 object_id = memtag_strip_tag(object_id); 195 if (object_id_len) { 196 res = bb_memdup_user_private(object_id, object_id_len, 197 &oid_bbuf); 198 if (res) 199 goto exit; 200 } 201 202 res = tee_pobj_get((void *)&sess->ctx->uuid, oid_bbuf, 203 object_id_len, flags, TEE_POBJ_USAGE_OPEN, fops, 204 &po); 205 bb_free(oid_bbuf, object_id_len); 206 if (res != TEE_SUCCESS) 207 goto err; 208 209 o = tee_obj_alloc(); 210 if (o == NULL) { 211 tee_pobj_release(po); 212 res = TEE_ERROR_OUT_OF_MEMORY; 213 goto err; 214 } 215 216 o->info.handleFlags = TEE_HANDLE_FLAG_PERSISTENT | 217 TEE_HANDLE_FLAG_INITIALIZED | flags; 218 o->pobj = po; 219 tee_obj_add(utc, o); 220 221 res = tee_svc_storage_read_head(o); 222 if (res != TEE_SUCCESS) { 223 if (res == TEE_ERROR_CORRUPT_OBJECT) { 224 EMSG("Object corrupt"); 225 goto err; 226 } 227 goto oclose; 228 } 229 230 res = copy_kaddr_to_uref(obj, o); 231 if (res != TEE_SUCCESS) 232 goto oclose; 233 234 goto exit; 235 236 oclose: 237 tee_obj_close(utc, o); 238 o = NULL; 239 240 err: 241 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 242 res = TEE_ERROR_CORRUPT_OBJECT; 243 if (res == TEE_ERROR_CORRUPT_OBJECT && o) 244 remove_corrupt_obj(utc, o); 245 246 exit: 247 return res; 248 } 249 250 static TEE_Result tee_svc_storage_init_file(struct tee_obj *o, bool overwrite, 251 struct tee_obj *attr_o, 252 void *data, uint32_t len) 253 { 254 TEE_Result res = TEE_SUCCESS; 255 struct tee_svc_storage_head head = { }; 256 const struct tee_file_operations *fops = o->pobj->fops; 257 void *attr = NULL; 258 size_t attr_size = 0; 259 260 if (attr_o) { 261 if (o != attr_o) { 262 res = tee_obj_set_type(o, attr_o->info.objectType, 263 attr_o->info.maxObjectSize); 264 if (res) 265 return res; 266 res = tee_obj_attr_copy_from(o, attr_o); 267 if (res) 268 return res; 269 o->have_attrs = attr_o->have_attrs; 270 o->info.objectUsage = attr_o->info.objectUsage; 271 o->info.objectSize = attr_o->info.objectSize; 272 } 273 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 274 if (res) 275 return res; 276 if (attr_size) { 277 attr = malloc(attr_size); 278 if (!attr) 279 return TEE_ERROR_OUT_OF_MEMORY; 280 res = tee_obj_attr_to_binary(o, attr, &attr_size); 281 if (res != TEE_SUCCESS) 282 goto exit; 283 } 284 } else { 285 res = tee_obj_set_type(o, TEE_TYPE_DATA, 0); 286 if (res != TEE_SUCCESS) 287 goto exit; 288 } 289 290 o->ds_pos = sizeof(struct tee_svc_storage_head) + attr_size; 291 292 /* write head */ 293 head.attr_size = attr_size; 294 head.objectSize = o->info.objectSize; 295 head.maxObjectSize = o->info.maxObjectSize; 296 head.objectUsage = o->info.objectUsage; 297 head.objectType = o->info.objectType; 298 head.have_attrs = o->have_attrs; 299 300 res = fops->create(o->pobj, overwrite, &head, sizeof(head), attr, 301 attr_size, NULL, data, len, &o->fh); 302 303 if (res) 304 o->ds_pos = 0; 305 else 306 o->info.dataSize = len; 307 exit: 308 free(attr); 309 return res; 310 } 311 312 TEE_Result syscall_storage_obj_create(unsigned long storage_id, void *object_id, 313 size_t object_id_len, unsigned long flags, 314 unsigned long attr, void *data, size_t len, 315 uint32_t *obj) 316 { 317 const unsigned long valid_flags = TEE_DATA_FLAG_ACCESS_READ | 318 TEE_DATA_FLAG_ACCESS_WRITE | 319 TEE_DATA_FLAG_ACCESS_WRITE_META | 320 TEE_DATA_FLAG_SHARE_READ | 321 TEE_DATA_FLAG_SHARE_WRITE | 322 TEE_DATA_FLAG_OVERWRITE; 323 const struct tee_file_operations *fops = 324 tee_svc_storage_file_ops(storage_id); 325 struct ts_session *sess = ts_get_current_session(); 326 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 327 struct tee_obj *attr_o = NULL; 328 TEE_Result res = TEE_SUCCESS; 329 struct tee_pobj *po = NULL; 330 struct tee_obj *o = NULL; 331 void *oid_bbuf = NULL; 332 333 if (flags & ~valid_flags) 334 return TEE_ERROR_BAD_PARAMETERS; 335 336 if (!fops) 337 return TEE_ERROR_ITEM_NOT_FOUND; 338 339 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 340 return TEE_ERROR_BAD_PARAMETERS; 341 342 object_id = memtag_strip_tag(object_id); 343 data = memtag_strip_tag(data); 344 345 /* Check presence of optional buffer */ 346 if (len && !data) 347 return TEE_ERROR_BAD_PARAMETERS; 348 349 if (object_id_len) { 350 res = bb_memdup_user_private(object_id, object_id_len, 351 &oid_bbuf); 352 if (res) 353 return res; 354 } 355 356 res = tee_pobj_get((void *)&sess->ctx->uuid, oid_bbuf, 357 object_id_len, flags, TEE_POBJ_USAGE_CREATE, 358 fops, &po); 359 bb_free(oid_bbuf, object_id_len); 360 if (res != TEE_SUCCESS) 361 goto err; 362 363 if (attr != TEE_HANDLE_NULL) { 364 res = tee_obj_get(utc, uref_to_vaddr(attr), &attr_o); 365 if (res != TEE_SUCCESS) 366 goto err; 367 /* The supplied handle must be one of an initialized object */ 368 if (!(attr_o->info.handleFlags & TEE_HANDLE_FLAG_INITIALIZED)) { 369 res = TEE_ERROR_BAD_PARAMETERS; 370 goto err; 371 } 372 } 373 374 if (!obj && attr_o && 375 !(attr_o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 376 /* 377 * The caller expects the supplied attributes handle to be 378 * transformed into a persistent object. 379 */ 380 uint32_t saved_flags = attr_o->info.handleFlags; 381 382 attr_o->info.handleFlags = TEE_HANDLE_FLAG_PERSISTENT | 383 TEE_HANDLE_FLAG_INITIALIZED | flags; 384 attr_o->pobj = po; 385 res = tee_svc_storage_init_file(attr_o, 386 flags & TEE_DATA_FLAG_OVERWRITE, 387 attr_o, data, len); 388 if (res) { 389 attr_o->info.handleFlags = saved_flags; 390 attr_o->pobj = NULL; 391 goto err; 392 } 393 } else { 394 o = tee_obj_alloc(); 395 if (!o) { 396 res = TEE_ERROR_OUT_OF_MEMORY; 397 goto err; 398 } 399 400 o->info.handleFlags = TEE_HANDLE_FLAG_PERSISTENT | 401 TEE_HANDLE_FLAG_INITIALIZED | flags; 402 o->pobj = po; 403 404 res = tee_svc_storage_init_file(o, 405 flags & TEE_DATA_FLAG_OVERWRITE, 406 attr_o, data, len); 407 if (res != TEE_SUCCESS) 408 goto err; 409 410 po = NULL; /* o owns it from now on */ 411 tee_obj_add(utc, o); 412 413 if (obj) { 414 res = copy_kaddr_to_uref(obj, o); 415 if (res != TEE_SUCCESS) 416 goto oclose; 417 } 418 419 tee_pobj_create_final(o->pobj); 420 421 if (!obj) 422 tee_obj_close(utc, o); 423 } 424 425 return TEE_SUCCESS; 426 427 oclose: 428 tee_obj_close(utc, o); 429 return res; 430 431 err: 432 if (res == TEE_ERROR_NO_DATA || res == TEE_ERROR_BAD_FORMAT) 433 res = TEE_ERROR_CORRUPT_OBJECT; 434 if (res == TEE_ERROR_CORRUPT_OBJECT && po) 435 fops->remove(po); 436 if (o) { 437 fops->close(&o->fh); 438 tee_obj_free(o); 439 } 440 if (po) 441 tee_pobj_release(po); 442 443 return res; 444 } 445 446 TEE_Result syscall_storage_obj_del(unsigned long obj) 447 { 448 struct ts_session *sess = ts_get_current_session(); 449 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 450 TEE_Result res = TEE_SUCCESS; 451 struct tee_obj *o = NULL; 452 453 res = tee_obj_get(utc, uref_to_vaddr(obj), &o); 454 if (res != TEE_SUCCESS) 455 return res; 456 457 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE_META)) 458 return TEE_ERROR_ACCESS_CONFLICT; 459 460 if (o->pobj == NULL || o->pobj->obj_id == NULL) 461 return TEE_ERROR_BAD_STATE; 462 463 if (IS_ENABLED(CFG_NXP_SE05X)) { 464 /* Cryptographic layer house-keeping */ 465 res = crypto_storage_obj_del(o); 466 if (res) 467 return res; 468 } 469 470 res = o->pobj->fops->remove(o->pobj); 471 tee_obj_close(utc, o); 472 473 return res; 474 } 475 476 TEE_Result syscall_storage_obj_rename(unsigned long obj, void *object_id, 477 size_t object_id_len) 478 { 479 const struct tee_file_operations *fops = NULL; 480 struct ts_session *sess = ts_get_current_session(); 481 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 482 TEE_Result res = TEE_SUCCESS; 483 struct tee_pobj *po = NULL; 484 struct tee_obj *o = NULL; 485 char *new_file = NULL; 486 char *old_file = NULL; 487 void *oid_bbuf = NULL; 488 489 if (object_id_len > TEE_OBJECT_ID_MAX_LEN) 490 return TEE_ERROR_BAD_PARAMETERS; 491 492 res = tee_obj_get(utc, uref_to_vaddr(obj), &o); 493 if (res != TEE_SUCCESS) 494 return res; 495 496 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 497 res = TEE_ERROR_BAD_STATE; 498 goto exit; 499 } 500 501 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE_META)) { 502 res = TEE_ERROR_BAD_STATE; 503 goto exit; 504 } 505 506 if (o->pobj == NULL || o->pobj->obj_id == NULL) { 507 res = TEE_ERROR_BAD_STATE; 508 goto exit; 509 } 510 511 object_id = memtag_strip_tag(object_id); 512 if (object_id_len) { 513 res = bb_memdup_user_private(object_id, object_id_len, 514 &oid_bbuf); 515 if (res) 516 goto exit; 517 } 518 519 /* reserve dest name */ 520 fops = o->pobj->fops; 521 res = tee_pobj_get((void *)&sess->ctx->uuid, oid_bbuf, 522 object_id_len, TEE_DATA_FLAG_ACCESS_WRITE_META, 523 TEE_POBJ_USAGE_RENAME, fops, &po); 524 bb_free(oid_bbuf, object_id_len); 525 if (res != TEE_SUCCESS) 526 goto exit; 527 528 /* move */ 529 res = fops->rename(o->pobj, po, false /* no overwrite */); 530 if (res) 531 goto exit; 532 533 res = tee_pobj_rename(o->pobj, po->obj_id, po->obj_id_len); 534 535 exit: 536 tee_pobj_release(po); 537 538 free(new_file); 539 free(old_file); 540 541 return res; 542 } 543 544 TEE_Result syscall_storage_alloc_enum(uint32_t *obj_enum) 545 { 546 struct ts_session *sess = ts_get_current_session(); 547 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 548 struct tee_storage_enum *e = NULL; 549 550 if (obj_enum == NULL) 551 return TEE_ERROR_BAD_PARAMETERS; 552 553 e = malloc(sizeof(struct tee_storage_enum)); 554 if (e == NULL) 555 return TEE_ERROR_OUT_OF_MEMORY; 556 557 e->dir = NULL; 558 e->fops = NULL; 559 TAILQ_INSERT_TAIL(&utc->storage_enums, e, link); 560 561 return copy_kaddr_to_uref(obj_enum, e); 562 } 563 564 TEE_Result syscall_storage_free_enum(unsigned long obj_enum) 565 { 566 struct ts_session *sess = ts_get_current_session(); 567 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 568 struct tee_storage_enum *e = NULL; 569 TEE_Result res = TEE_SUCCESS; 570 571 res = tee_svc_storage_get_enum(utc, 572 uref_to_vaddr(obj_enum), &e); 573 if (res != TEE_SUCCESS) 574 return res; 575 576 return tee_svc_close_enum(utc, e); 577 } 578 579 TEE_Result syscall_storage_reset_enum(unsigned long obj_enum) 580 { 581 struct ts_session *sess = ts_get_current_session(); 582 struct tee_storage_enum *e = NULL; 583 TEE_Result res = TEE_SUCCESS; 584 585 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 586 uref_to_vaddr(obj_enum), &e); 587 if (res != TEE_SUCCESS) 588 return res; 589 590 if (e->fops) { 591 e->fops->closedir(e->dir); 592 e->fops = NULL; 593 e->dir = NULL; 594 } 595 assert(!e->dir); 596 597 return TEE_SUCCESS; 598 } 599 600 TEE_Result syscall_storage_start_enum(unsigned long obj_enum, 601 unsigned long storage_id) 602 { 603 struct ts_session *sess = ts_get_current_session(); 604 struct tee_storage_enum *e = NULL; 605 TEE_Result res = TEE_SUCCESS; 606 const struct tee_file_operations *fops = 607 tee_svc_storage_file_ops(storage_id); 608 609 res = tee_svc_storage_get_enum(to_user_ta_ctx(sess->ctx), 610 uref_to_vaddr(obj_enum), &e); 611 if (res != TEE_SUCCESS) 612 return res; 613 614 if (e->dir) { 615 e->fops->closedir(e->dir); 616 e->dir = NULL; 617 } 618 619 if (!fops) 620 return TEE_ERROR_ITEM_NOT_FOUND; 621 622 e->fops = fops; 623 624 return fops->opendir(&sess->ctx->uuid, &e->dir); 625 } 626 627 TEE_Result syscall_storage_next_enum(unsigned long obj_enum, 628 struct utee_object_info *info, 629 void *obj_id, uint64_t *len) 630 { 631 struct ts_session *sess = ts_get_current_session(); 632 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 633 struct tee_storage_enum *e = NULL; 634 struct tee_fs_dirent *d = NULL; 635 TEE_Result res = TEE_SUCCESS; 636 struct tee_obj *o = NULL; 637 uint64_t l = 0; 638 struct utee_object_info bbuf = { }; 639 640 res = tee_svc_storage_get_enum(utc, uref_to_vaddr(obj_enum), &e); 641 if (res != TEE_SUCCESS) 642 goto exit; 643 644 info = memtag_strip_tag(info); 645 obj_id = memtag_strip_tag(obj_id); 646 647 /* check rights of the provided buffers */ 648 res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_WRITE, 649 (uaddr_t)info, sizeof(*info)); 650 if (res != TEE_SUCCESS) 651 goto exit; 652 653 res = vm_check_access_rights(&utc->uctx, TEE_MEMORY_ACCESS_WRITE, 654 (uaddr_t)obj_id, TEE_OBJECT_ID_MAX_LEN); 655 if (res != TEE_SUCCESS) 656 goto exit; 657 658 if (!e->fops) { 659 res = TEE_ERROR_ITEM_NOT_FOUND; 660 goto exit; 661 } 662 663 res = e->fops->readdir(e->dir, &d); 664 if (res != TEE_SUCCESS) 665 goto exit; 666 667 o = tee_obj_alloc(); 668 if (o == NULL) { 669 res = TEE_ERROR_OUT_OF_MEMORY; 670 goto exit; 671 } 672 673 res = tee_pobj_get(&sess->ctx->uuid, d->oid, d->oidlen, 0, 674 TEE_POBJ_USAGE_ENUM, e->fops, &o->pobj); 675 if (res) 676 goto exit; 677 678 o->info.handleFlags = o->pobj->flags | TEE_HANDLE_FLAG_PERSISTENT | 679 TEE_HANDLE_FLAG_INITIALIZED; 680 681 res = tee_svc_storage_read_head(o); 682 if (res != TEE_SUCCESS) 683 goto exit; 684 685 bbuf = (struct utee_object_info){ 686 .obj_type = o->info.objectType, 687 .obj_size = o->info.objectSize, 688 .max_obj_size = o->info.maxObjectSize, 689 .obj_usage = o->info.objectUsage, 690 .data_size = o->info.dataSize, 691 .data_pos = o->info.dataPosition, 692 .handle_flags = o->info.handleFlags, 693 }; 694 res = copy_to_user(info, &bbuf, sizeof(bbuf)); 695 if (res) 696 goto exit; 697 698 res = copy_to_user(obj_id, o->pobj->obj_id, o->pobj->obj_id_len); 699 if (res) 700 goto exit; 701 702 l = o->pobj->obj_id_len; 703 res = copy_to_user_private(len, &l, sizeof(*len)); 704 705 exit: 706 if (o) { 707 if (o->pobj) { 708 o->pobj->fops->close(&o->fh); 709 tee_pobj_release(o->pobj); 710 } 711 tee_obj_free(o); 712 } 713 714 return res; 715 } 716 717 TEE_Result syscall_storage_obj_read(unsigned long obj, void *data, size_t len, 718 uint64_t *count) 719 { 720 struct ts_session *sess = ts_get_current_session(); 721 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 722 TEE_Result res = TEE_SUCCESS; 723 struct tee_obj *o = NULL; 724 uint64_t u_count = 0; 725 size_t pos_tmp = 0; 726 size_t bytes = 0; 727 728 res = tee_obj_get(utc, uref_to_vaddr(obj), &o); 729 if (res != TEE_SUCCESS) 730 goto exit; 731 732 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 733 res = TEE_ERROR_BAD_STATE; 734 goto exit; 735 } 736 737 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_READ)) { 738 res = TEE_ERROR_ACCESS_CONFLICT; 739 goto exit; 740 } 741 742 /* Guard o->info.dataPosition += bytes below from overflowing */ 743 if (ADD_OVERFLOW(o->info.dataPosition, len, &pos_tmp)) { 744 res = TEE_ERROR_OVERFLOW; 745 goto exit; 746 } 747 748 data = memtag_strip_tag(data); 749 750 bytes = len; 751 if (ADD_OVERFLOW(o->ds_pos, o->info.dataPosition, &pos_tmp)) { 752 res = TEE_ERROR_OVERFLOW; 753 goto exit; 754 } 755 res = o->pobj->fops->read(o->fh, pos_tmp, NULL, data, &bytes); 756 if (res != TEE_SUCCESS) { 757 if (res == TEE_ERROR_CORRUPT_OBJECT) { 758 EMSG("Object corrupt"); 759 remove_corrupt_obj(utc, o); 760 } 761 goto exit; 762 } 763 764 o->info.dataPosition += bytes; 765 766 u_count = bytes; 767 res = copy_to_user_private(count, &u_count, sizeof(*count)); 768 exit: 769 return res; 770 } 771 772 TEE_Result syscall_storage_obj_write(unsigned long obj, void *data, size_t len) 773 { 774 struct ts_session *sess = ts_get_current_session(); 775 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 776 TEE_Result res = TEE_SUCCESS; 777 struct tee_obj *o = NULL; 778 size_t pos_tmp = 0; 779 780 res = tee_obj_get(utc, uref_to_vaddr(obj), &o); 781 if (res != TEE_SUCCESS) 782 goto exit; 783 784 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 785 res = TEE_ERROR_BAD_STATE; 786 goto exit; 787 } 788 789 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE)) { 790 res = TEE_ERROR_ACCESS_CONFLICT; 791 goto exit; 792 } 793 794 /* Guard o->info.dataPosition += bytes below from overflowing */ 795 if (ADD_OVERFLOW(o->info.dataPosition, len, &pos_tmp)) { 796 res = TEE_ERROR_OVERFLOW; 797 goto exit; 798 } 799 800 data = memtag_strip_tag(data); 801 802 if (ADD_OVERFLOW(o->ds_pos, o->info.dataPosition, &pos_tmp)) { 803 res = TEE_ERROR_ACCESS_CONFLICT; 804 goto exit; 805 } 806 res = o->pobj->fops->write(o->fh, pos_tmp, NULL, data, len); 807 if (res != TEE_SUCCESS) { 808 if (res == TEE_ERROR_CORRUPT_OBJECT) { 809 EMSG("Object corrupt"); 810 remove_corrupt_obj(utc, o); 811 } 812 goto exit; 813 } 814 815 o->info.dataPosition += len; 816 if (o->info.dataPosition > o->info.dataSize) 817 o->info.dataSize = o->info.dataPosition; 818 819 exit: 820 return res; 821 } 822 823 TEE_Result syscall_storage_obj_trunc(unsigned long obj, size_t len) 824 { 825 struct ts_session *sess = ts_get_current_session(); 826 TEE_Result res = TEE_SUCCESS; 827 struct tee_obj *o = NULL; 828 size_t off = 0; 829 size_t attr_size = 0; 830 831 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 832 if (res != TEE_SUCCESS) 833 goto exit; 834 835 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) { 836 res = TEE_ERROR_BAD_STATE; 837 goto exit; 838 } 839 840 if (!(o->info.handleFlags & TEE_DATA_FLAG_ACCESS_WRITE)) { 841 res = TEE_ERROR_ACCESS_CONFLICT; 842 goto exit; 843 } 844 845 res = tee_obj_attr_to_binary(o, NULL, &attr_size); 846 if (res != TEE_SUCCESS) 847 goto exit; 848 849 if (ADD_OVERFLOW(sizeof(struct tee_svc_storage_head), attr_size, 850 &off)) { 851 res = TEE_ERROR_OVERFLOW; 852 goto exit; 853 } 854 if (ADD_OVERFLOW(len, off, &off)) { 855 res = TEE_ERROR_OVERFLOW; 856 goto exit; 857 } 858 res = o->pobj->fops->truncate(o->fh, off); 859 switch (res) { 860 case TEE_SUCCESS: 861 o->info.dataSize = len; 862 break; 863 case TEE_ERROR_CORRUPT_OBJECT: 864 EMSG("Object corruption"); 865 remove_corrupt_obj(to_user_ta_ctx(sess->ctx), o); 866 break; 867 default: 868 res = TEE_ERROR_GENERIC; 869 break; 870 } 871 872 exit: 873 return res; 874 } 875 876 TEE_Result syscall_storage_obj_seek(unsigned long obj, int32_t offset, 877 unsigned long whence) 878 { 879 struct ts_session *sess = ts_get_current_session(); 880 TEE_Result res = TEE_SUCCESS; 881 struct tee_obj *o = NULL; 882 tee_fs_off_t new_pos = 0; 883 884 res = tee_obj_get(to_user_ta_ctx(sess->ctx), uref_to_vaddr(obj), &o); 885 if (res != TEE_SUCCESS) 886 return res; 887 888 if (!(o->info.handleFlags & TEE_HANDLE_FLAG_PERSISTENT)) 889 return TEE_ERROR_BAD_STATE; 890 891 switch (whence) { 892 case TEE_DATA_SEEK_SET: 893 new_pos = offset; 894 break; 895 case TEE_DATA_SEEK_CUR: 896 if (ADD_OVERFLOW(o->info.dataPosition, offset, &new_pos)) 897 return TEE_ERROR_OVERFLOW; 898 break; 899 case TEE_DATA_SEEK_END: 900 if (ADD_OVERFLOW(o->info.dataSize, offset, &new_pos)) 901 return TEE_ERROR_OVERFLOW; 902 break; 903 default: 904 return TEE_ERROR_BAD_PARAMETERS; 905 } 906 907 if (new_pos < 0) 908 new_pos = 0; 909 910 if (new_pos > TEE_DATA_MAX_POSITION) { 911 EMSG("Position is beyond TEE_DATA_MAX_POSITION"); 912 return TEE_ERROR_BAD_PARAMETERS; 913 } 914 915 o->info.dataPosition = new_pos; 916 917 return TEE_SUCCESS; 918 } 919 920 void tee_svc_storage_close_all_enum(struct user_ta_ctx *utc) 921 { 922 struct tee_storage_enum_head *eh = &utc->storage_enums; 923 924 /* disregard return value */ 925 while (!TAILQ_EMPTY(eh)) 926 tee_svc_close_enum(utc, TAILQ_FIRST(eh)); 927 } 928