osfmk/ipc/mach_kernelrpc.c

   1 /*
   2  * Copyright (c) 2011 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #include <mach/mach_types.h>
  30 #include <mach/mach_traps.h>
  31 #include <mach/mach_vm_server.h>
  32 #include <mach/mach_port_server.h>
  33 #include <mach/mach_host_server.h>
  34 #include <mach/mach_voucher_server.h>
  35 #include <mach/vm_map.h>
  36 #include <kern/task.h>
  37 #include <kern/ipc_tt.h>
  38 #include <kern/kalloc.h>
  39 #include <vm/vm_protos.h>
  40
  41 int
  42 _kernelrpc_mach_vm_allocate_trap(struct _kernelrpc_mach_vm_allocate_trap_args *args)
  43 {
  44         mach_vm_offset_t addr;
  45         task_t task = port_name_to_task(args->target);
  46         int rv = MACH_SEND_INVALID_DEST;
  47
  48         if (task != current_task())
  49                 goto done;
  50
  51         if (copyin(args->addr, (char *)&addr, sizeof (addr)))
  52                 goto done;
  53
  54         rv = mach_vm_allocate_external(task->map, &addr, args->size, args->flags);
  55         if (rv == KERN_SUCCESS)
  56                 rv = copyout(&addr, args->addr, sizeof (addr));
  57
  58 done:
  59         if (task)
  60                 task_deallocate(task);
  61         return (rv);
  62 }
  63
  64 int
  65 _kernelrpc_mach_vm_deallocate_trap(struct _kernelrpc_mach_vm_deallocate_args *args)
  66 {
  67         task_t task = port_name_to_task(args->target);
  68         int rv = MACH_SEND_INVALID_DEST;
  69
  70         if (task != current_task())
  71                 goto done;
  72
  73         rv = mach_vm_deallocate(task->map, args->address, args->size);
  74
  75 done:
  76         if (task)
  77                 task_deallocate(task);
  78         return (rv);
  79 }
  80
  81 int
  82 _kernelrpc_mach_vm_protect_trap(struct _kernelrpc_mach_vm_protect_args *args)
  83 {
  84         task_t task = port_name_to_task(args->target);
  85         int rv = MACH_SEND_INVALID_DEST;
  86
  87         if (task != current_task())
  88                 goto done;
  89
  90         rv = mach_vm_protect(task->map, args->address, args->size,
  91             args->set_maximum, args->new_protection);
  92
  93 done:
  94         if (task)
  95                 task_deallocate(task);
  96         return (rv);
  97 }
  98
  99 int
 100 _kernelrpc_mach_vm_map_trap(struct _kernelrpc_mach_vm_map_trap_args *args)
 101 {
 102         mach_vm_offset_t addr;
 103         task_t task = port_name_to_task(args->target);
 104         int rv = MACH_SEND_INVALID_DEST;
 105
 106         if (task != current_task())
 107                 goto done;
 108
 109         if (copyin(args->addr, (char *)&addr, sizeof (addr)))
 110                 goto done;
 111
 112         rv = mach_vm_map_external(task->map, &addr, args->size, args->mask, args->flags,
 113                         IPC_PORT_NULL, 0, FALSE, args->cur_protection, VM_PROT_ALL,
 114                         VM_INHERIT_DEFAULT);
 115         if (rv == KERN_SUCCESS)
 116                 rv = copyout(&addr, args->addr, sizeof (addr));
 117
 118 done:
 119         if (task)
 120                 task_deallocate(task);
 121         return (rv);
 122 }
 123
 124 int
 125 _kernelrpc_mach_vm_purgable_control_trap(
 126         struct _kernelrpc_mach_vm_purgable_control_trap_args *args)
 127 {
 128         int state;
 129         task_t task = port_name_to_task(args->target);
 130         int rv = MACH_SEND_INVALID_DEST;
 131
 132         if (task != current_task())
 133                 goto done;
 134
 135         if (copyin(args->state, (char *)&state, sizeof (state)))
 136                 goto done;
 137
 138         rv = mach_vm_purgable_control(task->map,
 139                                       args->address,
 140                                       args->control,
 141                                       &state);
 142         if (rv == KERN_SUCCESS)
 143                 rv = copyout(&state, args->state, sizeof (state));
 144
 145 done:
 146         if (task)
 147                 task_deallocate(task);
 148         return (rv);
 149 }
 150
 151 int
 152 _kernelrpc_mach_port_allocate_trap(struct _kernelrpc_mach_port_allocate_args *args)
 153 {
 154         task_t task = port_name_to_task(args->target);
 155         mach_port_name_t name;
 156         int rv = MACH_SEND_INVALID_DEST;
 157
 158         if (task != current_task())
 159                 goto done;
 160
 161         rv = mach_port_allocate(task->itk_space, args->right, &name);
 162         if (rv == KERN_SUCCESS)
 163                 rv = copyout(&name, args->name, sizeof (name));
 164
 165
 166 done:
 167         if (task)
 168                 task_deallocate(task);
 169         return (rv);
 170 }
 171
 172 int
 173 _kernelrpc_mach_port_destroy_trap(struct _kernelrpc_mach_port_destroy_args *args)
 174 {
 175         task_t task = port_name_to_task(args->target);
 176         int rv = MACH_SEND_INVALID_DEST;
 177
 178         if (task != current_task())
 179                 goto done;
 180
 181         rv = mach_port_destroy(task->itk_space, args->name);
 182
 183 done:
 184         if (task)
 185                 task_deallocate(task);
 186         return (rv);
 187 }
 188
 189 int
 190 _kernelrpc_mach_port_deallocate_trap(struct _kernelrpc_mach_port_deallocate_args *args)
 191 {
 192         task_t task = port_name_to_task(args->target);
 193         int rv = MACH_SEND_INVALID_DEST;
 194
 195         if (task != current_task())
 196                 goto done;
 197
 198         rv = mach_port_deallocate(task->itk_space, args->name);
 199
 200 done:
 201         if (task)
 202                 task_deallocate(task);
 203         return (rv);
 204 }
 205
 206 int
 207 _kernelrpc_mach_port_mod_refs_trap(struct _kernelrpc_mach_port_mod_refs_args *args)
 208 {
 209         task_t task = port_name_to_task(args->target);
 210         int rv = MACH_SEND_INVALID_DEST;
 211
 212         if (task != current_task())
 213                 goto done;
 214
 215         rv = mach_port_mod_refs(task->itk_space, args->name, args->right, args->delta);
 216
 217 done:
 218         if (task)
 219                 task_deallocate(task);
 220         return (rv);
 221 }
 222
 223
 224 int
 225 _kernelrpc_mach_port_move_member_trap(struct _kernelrpc_mach_port_move_member_args *args)
 226 {
 227         task_t task = port_name_to_task(args->target);
 228         int rv = MACH_SEND_INVALID_DEST;
 229
 230         if (task != current_task())
 231                 goto done;
 232
 233         rv = mach_port_move_member(task->itk_space, args->member, args->after);
 234
 235 done:
 236         if (task)
 237                 task_deallocate(task);
 238         return (rv);
 239 }
 240
 241 int
 242 _kernelrpc_mach_port_insert_right_trap(struct _kernelrpc_mach_port_insert_right_args *args)
 243 {
 244         task_t task = port_name_to_task(args->target);
 245         ipc_port_t port;
 246         mach_msg_type_name_t disp;
 247         int rv = MACH_SEND_INVALID_DEST;
 248
 249         if (task != current_task())
 250                 goto done;
 251
 252         rv = ipc_object_copyin(task->itk_space, args->poly, args->polyPoly,
 253             (ipc_object_t *)&port);
 254         if (rv != KERN_SUCCESS)
 255                 goto done;
 256         disp = ipc_object_copyin_type(args->polyPoly);
 257
 258         rv = mach_port_insert_right(task->itk_space, args->name, port, disp);
 259         if (rv != KERN_SUCCESS) {
 260                 if (IO_VALID((ipc_object_t)port)) {
 261                         ipc_object_destroy((ipc_object_t)port, disp);
 262                 }
 263         }
 264
 265 done:
 266         if (task)
 267                 task_deallocate(task);
 268         return (rv);
 269 }
 270
 271 int
 272 _kernelrpc_mach_port_insert_member_trap(struct _kernelrpc_mach_port_insert_member_args *args)
 273 {
 274         task_t task = port_name_to_task(args->target);
 275         int rv = MACH_SEND_INVALID_DEST;
 276
 277         if (task != current_task())
 278                 goto done;
 279
 280         rv = mach_port_insert_member(task->itk_space, args->name, args->pset);
 281
 282 done:
 283         if (task)
 284                 task_deallocate(task);
 285         return (rv);
 286 }
 287
 288
 289 int
 290 _kernelrpc_mach_port_extract_member_trap(struct _kernelrpc_mach_port_extract_member_args *args)
 291 {
 292         task_t task = port_name_to_task(args->target);
 293         int rv = MACH_SEND_INVALID_DEST;
 294
 295         if (task != current_task())
 296                 goto done;
 297
 298         rv = mach_port_extract_member(task->itk_space, args->name, args->pset);
 299
 300 done:
 301         if (task)
 302                 task_deallocate(task);
 303         return (rv);
 304 }
 305
 306 int
 307 _kernelrpc_mach_port_construct_trap(struct _kernelrpc_mach_port_construct_args *args)
 308 {
 309         task_t task = port_name_to_task(args->target);
 310         mach_port_name_t name;
 311         int rv = MACH_SEND_INVALID_DEST;
 312         mach_port_options_t options;
 313
 314         if (copyin(args->options, (char *)&options, sizeof (options))) {
 315                 rv = MACH_SEND_INVALID_DATA;
 316                 goto done;
 317         }
 318
 319         if (task != current_task())
 320                 goto done;
 321
 322         rv = mach_port_construct(task->itk_space, &options, args->context, &name);
 323         if (rv == KERN_SUCCESS)
 324                 rv = copyout(&name, args->name, sizeof (name));
 325
 326 done:
 327         if (task)
 328                 task_deallocate(task);
 329         return (rv);
 330 }
 331
 332 int
 333 _kernelrpc_mach_port_destruct_trap(struct _kernelrpc_mach_port_destruct_args *args)
 334 {
 335         task_t task = port_name_to_task(args->target);
 336         int rv = MACH_SEND_INVALID_DEST;
 337
 338         if (task != current_task())
 339                 goto done;
 340
 341         rv = mach_port_destruct(task->itk_space, args->name, args->srdelta, args->guard);
 342
 343 done:
 344         if (task)
 345                 task_deallocate(task);
 346         return (rv);
 347 }
 348
 349 int
 350 _kernelrpc_mach_port_guard_trap(struct _kernelrpc_mach_port_guard_args *args)
 351 {
 352         task_t task = port_name_to_task(args->target);
 353         int rv = MACH_SEND_INVALID_DEST;
 354
 355         if (task != current_task())
 356                 goto done;
 357
 358         rv = mach_port_guard(task->itk_space, args->name, args->guard, args->strict);
 359
 360 done:
 361         if (task)
 362                 task_deallocate(task);
 363         return (rv);
 364 }
 365
 366 int
 367 _kernelrpc_mach_port_unguard_trap(struct _kernelrpc_mach_port_unguard_args *args)
 368 {
 369         task_t task = port_name_to_task(args->target);
 370         int rv = MACH_SEND_INVALID_DEST;
 371
 372         if (task != current_task())
 373                 goto done;
 374
 375         rv = mach_port_unguard(task->itk_space, args->name, args->guard);
 376
 377 done:
 378         if (task)
 379                 task_deallocate(task);
 380         return (rv);
 381 }
 382
 383 kern_return_t
 384 host_create_mach_voucher_trap(struct host_create_mach_voucher_args *args)
 385 {
 386         host_t host = port_name_to_host(args->host);
 387         ipc_voucher_t new_voucher = IV_NULL;
 388         ipc_port_t voucher_port = IPC_PORT_NULL;
 389         mach_port_name_t voucher_name = 0;
 390         kern_return_t kr = 0;
 391
 392         if (host == HOST_NULL)
 393                 return MACH_SEND_INVALID_DEST;
 394
 395         if (args->recipes_size < 0)
 396                 return KERN_INVALID_ARGUMENT;
 397         else if (args->recipes_size > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE)
 398                 return MIG_ARRAY_TOO_LARGE;
 399
 400         if (args->recipes_size < MACH_VOUCHER_TRAP_STACK_LIMIT) {
 401                 /* keep small recipes on the stack for speed */
 402                 uint8_t krecipes[args->recipes_size];
 403                 if (copyin(CAST_USER_ADDR_T(args->recipes), (void *)krecipes, args->recipes_size)) {
 404                         kr = KERN_MEMORY_ERROR;
 405                         goto done;
 406                 }
 407                 kr = host_create_mach_voucher(host, krecipes, args->recipes_size, &new_voucher);
 408         } else {
 409                 uint8_t *krecipes = kalloc((vm_size_t)args->recipes_size);
 410                 if (!krecipes) {
 411                         kr = KERN_RESOURCE_SHORTAGE;
 412                         goto done;
 413                 }
 414
 415                 if (copyin(CAST_USER_ADDR_T(args->recipes), (void *)krecipes, args->recipes_size)) {
 416                         kfree(krecipes, (vm_size_t)args->recipes_size);
 417                         kr = KERN_MEMORY_ERROR;
 418                         goto done;
 419                 }
 420
 421                 kr = host_create_mach_voucher(host, krecipes, args->recipes_size, &new_voucher);
 422                 kfree(krecipes, (vm_size_t)args->recipes_size);
 423         }
 424
 425         if (kr == 0) {
 426                 voucher_port = convert_voucher_to_port(new_voucher);
 427                 voucher_name = ipc_port_copyout_send(voucher_port, current_space());
 428
 429                 kr = copyout(&voucher_name, args->voucher, sizeof(voucher_name));
 430         }
 431
 432 done:
 433         return kr;
 434 }
 435
 436 kern_return_t
 437 mach_voucher_extract_attr_recipe_trap(struct mach_voucher_extract_attr_recipe_args *args)
 438 {
 439         ipc_voucher_t voucher = IV_NULL;
 440         kern_return_t kr = KERN_SUCCESS;
 441         mach_msg_type_number_t sz = 0;
 442
 443         if (copyin(args->recipe_size, (void *)&sz, sizeof(sz)))
 444                 return KERN_MEMORY_ERROR;
 445
 446         if (sz > MACH_VOUCHER_ATTR_MAX_RAW_RECIPE_ARRAY_SIZE)
 447                 return MIG_ARRAY_TOO_LARGE;
 448
 449         voucher = convert_port_name_to_voucher(args->voucher_name);
 450         if (voucher == IV_NULL)
 451                 return MACH_SEND_INVALID_DEST;
 452
 453         mach_msg_type_number_t max_sz = sz;
 454
 455         if (sz < MACH_VOUCHER_TRAP_STACK_LIMIT) {
 456                 /* keep small recipes on the stack for speed */
 457                 uint8_t krecipe[sz];
 458                 if (copyin(CAST_USER_ADDR_T(args->recipe), (void *)krecipe, sz)) {
 459                         kr = KERN_MEMORY_ERROR;
 460                         goto done;
 461                 }
 462                 kr = mach_voucher_extract_attr_recipe(voucher, args->key,
 463                                                       (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
 464                 assert(sz <= max_sz);
 465
 466                 if (kr == KERN_SUCCESS && sz > 0)
 467                         kr = copyout(krecipe, CAST_USER_ADDR_T(args->recipe), sz);
 468         } else {
 469                 uint8_t *krecipe = kalloc((vm_size_t)max_sz);
 470                 if (!krecipe) {
 471                         kr = KERN_RESOURCE_SHORTAGE;
 472                         goto done;
 473                 }
 474
 475                 if (copyin(CAST_USER_ADDR_T(args->recipe), (void *)krecipe, sz)) {
 476                         kfree(krecipe, (vm_size_t)max_sz);
 477                         kr = KERN_MEMORY_ERROR;
 478                         goto done;
 479                 }
 480
 481                 kr = mach_voucher_extract_attr_recipe(voucher, args->key,
 482                                                       (mach_voucher_attr_raw_recipe_t)krecipe, &sz);
 483                 assert(sz <= max_sz);
 484
 485                 if (kr == KERN_SUCCESS && sz > 0)
 486                         kr = copyout(krecipe, CAST_USER_ADDR_T(args->recipe), sz);
 487                 kfree(krecipe, (vm_size_t)max_sz);
 488         }
 489
 490         kr = copyout(&sz, args->recipe_size, sizeof(sz));
 491
 492 done:
 493         ipc_voucher_release(voucher);
 494         return kr;
 495 }