mm/kasan/report.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This file contains common KASAN error reporting code.
   4  *
   5  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
   6  * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
   7  *
   8  * Some code borrowed from https://github.com/xairy/kasan-prototype by
   9  *        Andrey Konovalov <andreyknvl@gmail.com>
  10  */
  11
  12 #include <kunit/test.h>
  13 #include <linux/bitops.h>
  14 #include <linux/ftrace.h>
  15 #include <linux/init.h>
  16 #include <linux/kernel.h>
  17 #include <linux/lockdep.h>
  18 #include <linux/mm.h>
  19 #include <linux/printk.h>
  20 #include <linux/sched.h>
  21 #include <linux/slab.h>
  22 #include <linux/stackdepot.h>
  23 #include <linux/stacktrace.h>
  24 #include <linux/string.h>
  25 #include <linux/types.h>
  26 #include <linux/kasan.h>
  27 #include <linux/module.h>
  28 #include <linux/sched/task_stack.h>
  29 #include <linux/uaccess.h>
  30 #include <trace/events/error_report.h>
  31
  32 #include <asm/sections.h>
  33
  34 #include "kasan.h"
  35 #include "../slab.h"
  36
  37 static unsigned long kasan_flags;
  38
  39 #define KASAN_BIT_REPORTED      0
  40 #define KASAN_BIT_MULTI_SHOT    1
  41
  42 enum kasan_arg_fault {
  43         KASAN_ARG_FAULT_DEFAULT,
  44         KASAN_ARG_FAULT_REPORT,
  45         KASAN_ARG_FAULT_PANIC,
  46         KASAN_ARG_FAULT_PANIC_ON_WRITE,
  47 };
  48
  49 static enum kasan_arg_fault kasan_arg_fault __ro_after_init = KASAN_ARG_FAULT_DEFAULT;
  50
  51 /* kasan.fault=report/panic */
  52 static int __init early_kasan_fault(char *arg)
  53 {
  54         if (!arg)
  55                 return -EINVAL;
  56
  57         if (!strcmp(arg, "report"))
  58                 kasan_arg_fault = KASAN_ARG_FAULT_REPORT;
  59         else if (!strcmp(arg, "panic"))
  60                 kasan_arg_fault = KASAN_ARG_FAULT_PANIC;
  61         else if (!strcmp(arg, "panic_on_write"))
  62                 kasan_arg_fault = KASAN_ARG_FAULT_PANIC_ON_WRITE;
  63         else
  64                 return -EINVAL;
  65
  66         return 0;
  67 }
  68 early_param("kasan.fault", early_kasan_fault);
  69
  70 static int __init kasan_set_multi_shot(char *str)
  71 {
  72         set_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
  73         return 1;
  74 }
  75 __setup("kasan_multi_shot", kasan_set_multi_shot);
  76
  77 /*
  78  * This function is used to check whether KASAN reports are suppressed for
  79  * software KASAN modes via kasan_disable/enable_current() critical sections.
  80  *
  81  * This is done to avoid:
  82  * 1. False-positive reports when accessing slab metadata,
  83  * 2. Deadlocking when poisoned memory is accessed by the reporting code.
  84  *
  85  * Hardware Tag-Based KASAN instead relies on:
  86  * For #1: Resetting tags via kasan_reset_tag().
  87  * For #2: Suppression of tag checks via CPU, see report_suppress_start/end().
  88  */
  89 static bool report_suppressed_sw(void)
  90 {
  91 #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
  92         if (current->kasan_depth)
  93                 return true;
  94 #endif
  95         return false;
  96 }
  97
  98 static void report_suppress_start(void)
  99 {
 100 #ifdef CONFIG_KASAN_HW_TAGS
 101         /*
 102          * Disable preemption for the duration of printing a KASAN report, as
 103          * hw_suppress_tag_checks_start() disables checks on the current CPU.
 104          */
 105         preempt_disable();
 106         hw_suppress_tag_checks_start();
 107 #else
 108         kasan_disable_current();
 109 #endif
 110 }
 111
 112 static void report_suppress_stop(void)
 113 {
 114 #ifdef CONFIG_KASAN_HW_TAGS
 115         hw_suppress_tag_checks_stop();
 116         preempt_enable();
 117 #else
 118         kasan_enable_current();
 119 #endif
 120 }
 121
 122 /*
 123  * Used to avoid reporting more than one KASAN bug unless kasan_multi_shot
 124  * is enabled. Note that KASAN tests effectively enable kasan_multi_shot
 125  * for their duration.
 126  */
 127 static bool report_enabled(void)
 128 {
 129         if (test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
 130                 return true;
 131         return !test_and_set_bit(KASAN_BIT_REPORTED, &kasan_flags);
 132 }
 133
 134 #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST) || IS_ENABLED(CONFIG_KASAN_MODULE_TEST)
 135
 136 bool kasan_save_enable_multi_shot(void)
 137 {
 138         return test_and_set_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
 139 }
 140 EXPORT_SYMBOL_GPL(kasan_save_enable_multi_shot);
 141
 142 void kasan_restore_multi_shot(bool enabled)
 143 {
 144         if (!enabled)
 145                 clear_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags);
 146 }
 147 EXPORT_SYMBOL_GPL(kasan_restore_multi_shot);
 148
 149 #endif
 150
 151 #if IS_ENABLED(CONFIG_KASAN_KUNIT_TEST)
 152
 153 /*
 154  * Whether the KASAN KUnit test suite is currently being executed.
 155  * Updated in kasan_test.c.
 156  */
 157 static bool kasan_kunit_executing;
 158
 159 void kasan_kunit_test_suite_start(void)
 160 {
 161         WRITE_ONCE(kasan_kunit_executing, true);
 162 }
 163 EXPORT_SYMBOL_GPL(kasan_kunit_test_suite_start);
 164
 165 void kasan_kunit_test_suite_end(void)
 166 {
 167         WRITE_ONCE(kasan_kunit_executing, false);
 168 }
 169 EXPORT_SYMBOL_GPL(kasan_kunit_test_suite_end);
 170
 171 static bool kasan_kunit_test_suite_executing(void)
 172 {
 173         return READ_ONCE(kasan_kunit_executing);
 174 }
 175
 176 #else /* CONFIG_KASAN_KUNIT_TEST */
 177
 178 static inline bool kasan_kunit_test_suite_executing(void) { return false; }
 179
 180 #endif /* CONFIG_KASAN_KUNIT_TEST */
 181
 182 #if IS_ENABLED(CONFIG_KUNIT)
 183
 184 static void fail_non_kasan_kunit_test(void)
 185 {
 186         struct kunit *test;
 187
 188         if (kasan_kunit_test_suite_executing())
 189                 return;
 190
 191         test = current->kunit_test;
 192         if (test)
 193                 kunit_set_failure(test);
 194 }
 195
 196 #else /* CONFIG_KUNIT */
 197
 198 static inline void fail_non_kasan_kunit_test(void) { }
 199
 200 #endif /* CONFIG_KUNIT */
 201
 202 static DEFINE_SPINLOCK(report_lock);
 203
 204 static void start_report(unsigned long *flags, bool sync)
 205 {
 206         fail_non_kasan_kunit_test();
 207         /* Respect the /proc/sys/kernel/traceoff_on_warning interface. */
 208         disable_trace_on_warning();
 209         /* Do not allow LOCKDEP mangling KASAN reports. */
 210         lockdep_off();
 211         /* Make sure we don't end up in loop. */
 212         report_suppress_start();
 213         spin_lock_irqsave(&report_lock, *flags);
 214         pr_err("==================================================================\n");
 215 }
 216
 217 static void end_report(unsigned long *flags, const void *addr, bool is_write)
 218 {
 219         if (addr)
 220                 trace_error_report_end(ERROR_DETECTOR_KASAN,
 221                                        (unsigned long)addr);
 222         pr_err("==================================================================\n");
 223         spin_unlock_irqrestore(&report_lock, *flags);
 224         if (!test_bit(KASAN_BIT_MULTI_SHOT, &kasan_flags))
 225                 check_panic_on_warn("KASAN");
 226         switch (kasan_arg_fault) {
 227         case KASAN_ARG_FAULT_DEFAULT:
 228         case KASAN_ARG_FAULT_REPORT:
 229                 break;
 230         case KASAN_ARG_FAULT_PANIC:
 231                 panic("kasan.fault=panic set ...\n");
 232                 break;
 233         case KASAN_ARG_FAULT_PANIC_ON_WRITE:
 234                 if (is_write)
 235                         panic("kasan.fault=panic_on_write set ...\n");
 236                 break;
 237         }
 238         add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE);
 239         lockdep_on();
 240         report_suppress_stop();
 241 }
 242
 243 static void print_error_description(struct kasan_report_info *info)
 244 {
 245         pr_err("BUG: KASAN: %s in %pS\n", info->bug_type, (void *)info->ip);
 246
 247         if (info->type != KASAN_REPORT_ACCESS) {
 248                 pr_err("Free of addr %px by task %s/%d\n",
 249                         info->access_addr, current->comm, task_pid_nr(current));
 250                 return;
 251         }
 252
 253         if (info->access_size)
 254                 pr_err("%s of size %zu at addr %px by task %s/%d\n",
 255                         info->is_write ? "Write" : "Read", info->access_size,
 256                         info->access_addr, current->comm, task_pid_nr(current));
 257         else
 258                 pr_err("%s at addr %px by task %s/%d\n",
 259                         info->is_write ? "Write" : "Read",
 260                         info->access_addr, current->comm, task_pid_nr(current));
 261 }
 262
 263 static void print_track(struct kasan_track *track, const char *prefix)
 264 {
 265         pr_err("%s by task %u:\n", prefix, track->pid);
 266         if (track->stack)
 267                 stack_depot_print(track->stack);
 268         else
 269                 pr_err("(stack is not available)\n");
 270 }
 271
 272 static inline struct page *addr_to_page(const void *addr)
 273 {
 274         if (virt_addr_valid(addr))
 275                 return virt_to_head_page(addr);
 276         return NULL;
 277 }
 278
 279 static void describe_object_addr(const void *addr, struct kasan_report_info *info)
 280 {
 281         unsigned long access_addr = (unsigned long)addr;
 282         unsigned long object_addr = (unsigned long)info->object;
 283         const char *rel_type, *region_state = "";
 284         int rel_bytes;
 285
 286         pr_err("The buggy address belongs to the object at %px\n"
 287                " which belongs to the cache %s of size %d\n",
 288                 info->object, info->cache->name, info->cache->object_size);
 289
 290         if (access_addr < object_addr) {
 291                 rel_type = "to the left";
 292                 rel_bytes = object_addr - access_addr;
 293         } else if (access_addr >= object_addr + info->alloc_size) {
 294                 rel_type = "to the right";
 295                 rel_bytes = access_addr - (object_addr + info->alloc_size);
 296         } else {
 297                 rel_type = "inside";
 298                 rel_bytes = access_addr - object_addr;
 299         }
 300
 301         /*
 302          * Tag-Based modes use the stack ring to infer the bug type, but the
 303          * memory region state description is generated based on the metadata.
 304          * Thus, defining the region state as below can contradict the metadata.
 305          * Fixing this requires further improvements, so only infer the state
 306          * for the Generic mode.
 307          */
 308         if (IS_ENABLED(CONFIG_KASAN_GENERIC)) {
 309                 if (strcmp(info->bug_type, "slab-out-of-bounds") == 0)
 310                         region_state = "allocated ";
 311                 else if (strcmp(info->bug_type, "slab-use-after-free") == 0)
 312                         region_state = "freed ";
 313         }
 314
 315         pr_err("The buggy address is located %d bytes %s of\n"
 316                " %s%zu-byte region [%px, %px)\n",
 317                rel_bytes, rel_type, region_state, info->alloc_size,
 318                (void *)object_addr, (void *)(object_addr + info->alloc_size));
 319 }
 320
 321 static void describe_object_stacks(struct kasan_report_info *info)
 322 {
 323         if (info->alloc_track.stack) {
 324                 print_track(&info->alloc_track, "Allocated");
 325                 pr_err("\n");
 326         }
 327
 328         if (info->free_track.stack) {
 329                 print_track(&info->free_track, "Freed");
 330                 pr_err("\n");
 331         }
 332
 333         kasan_print_aux_stacks(info->cache, info->object);
 334 }
 335
 336 static void describe_object(const void *addr, struct kasan_report_info *info)
 337 {
 338         if (kasan_stack_collection_enabled())
 339                 describe_object_stacks(info);
 340         describe_object_addr(addr, info);
 341 }
 342
 343 static inline bool kernel_or_module_addr(const void *addr)
 344 {
 345         if (is_kernel((unsigned long)addr))
 346                 return true;
 347         if (is_module_address((unsigned long)addr))
 348                 return true;
 349         return false;
 350 }
 351
 352 static inline bool init_task_stack_addr(const void *addr)
 353 {
 354         return addr >= (void *)&init_thread_union.stack &&
 355                 (addr <= (void *)&init_thread_union.stack +
 356                         sizeof(init_thread_union.stack));
 357 }
 358
 359 static void print_address_description(void *addr, u8 tag,
 360                                       struct kasan_report_info *info)
 361 {
 362         struct page *page = addr_to_page(addr);
 363
 364         dump_stack_lvl(KERN_ERR);
 365         pr_err("\n");
 366
 367         if (info->cache && info->object) {
 368                 describe_object(addr, info);
 369                 pr_err("\n");
 370         }
 371
 372         if (kernel_or_module_addr(addr) && !init_task_stack_addr(addr)) {
 373                 pr_err("The buggy address belongs to the variable:\n");
 374                 pr_err(" %pS\n", addr);
 375                 pr_err("\n");
 376         }
 377
 378         if (object_is_on_stack(addr)) {
 379                 /*
 380                  * Currently, KASAN supports printing frame information only
 381                  * for accesses to the task's own stack.
 382                  */
 383                 kasan_print_address_stack_frame(addr);
 384                 pr_err("\n");
 385         }
 386
 387         if (is_vmalloc_addr(addr)) {
 388                 struct vm_struct *va = find_vm_area(addr);
 389
 390                 if (va) {
 391                         pr_err("The buggy address belongs to the virtual mapping at\n"
 392                                " [%px, %px) created by:\n"
 393                                " %pS\n",
 394                                va->addr, va->addr + va->size, va->caller);
 395                         pr_err("\n");
 396
 397                         page = vmalloc_to_page(addr);
 398                 }
 399         }
 400
 401         if (page) {
 402                 pr_err("The buggy address belongs to the physical page:\n");
 403                 dump_page(page, "kasan: bad access detected");
 404                 pr_err("\n");
 405         }
 406 }
 407
 408 static bool meta_row_is_guilty(const void *row, const void *addr)
 409 {
 410         return (row <= addr) && (addr < row + META_MEM_BYTES_PER_ROW);
 411 }
 412
 413 static int meta_pointer_offset(const void *row, const void *addr)
 414 {
 415         /*
 416          * Memory state around the buggy address:
 417          *  ff00ff00ff00ff00: 00 00 00 05 fe fe fe fe fe fe fe fe fe fe fe fe
 418          *  ...
 419          *
 420          * The length of ">ff00ff00ff00ff00: " is
 421          *    3 + (BITS_PER_LONG / 8) * 2 chars.
 422          * The length of each granule metadata is 2 bytes
 423          *    plus 1 byte for space.
 424          */
 425         return 3 + (BITS_PER_LONG / 8) * 2 +
 426                 (addr - row) / KASAN_GRANULE_SIZE * 3 + 1;
 427 }
 428
 429 static void print_memory_metadata(const void *addr)
 430 {
 431         int i;
 432         void *row;
 433
 434         row = (void *)round_down((unsigned long)addr, META_MEM_BYTES_PER_ROW)
 435                         - META_ROWS_AROUND_ADDR * META_MEM_BYTES_PER_ROW;
 436
 437         pr_err("Memory state around the buggy address:\n");
 438
 439         for (i = -META_ROWS_AROUND_ADDR; i <= META_ROWS_AROUND_ADDR; i++) {
 440                 char buffer[4 + (BITS_PER_LONG / 8) * 2];
 441                 char metadata[META_BYTES_PER_ROW];
 442
 443                 snprintf(buffer, sizeof(buffer),
 444                                 (i == 0) ? ">%px: " : " %px: ", row);
 445
 446                 /*
 447                  * We should not pass a shadow pointer to generic
 448                  * function, because generic functions may try to
 449                  * access kasan mapping for the passed address.
 450                  */
 451                 kasan_metadata_fetch_row(&metadata[0], row);
 452
 453                 print_hex_dump(KERN_ERR, buffer,
 454                         DUMP_PREFIX_NONE, META_BYTES_PER_ROW, 1,
 455                         metadata, META_BYTES_PER_ROW, 0);
 456
 457                 if (meta_row_is_guilty(row, addr))
 458                         pr_err("%*c\n", meta_pointer_offset(row, addr), '^');
 459
 460                 row += META_MEM_BYTES_PER_ROW;
 461         }
 462 }
 463
 464 static void print_report(struct kasan_report_info *info)
 465 {
 466         void *addr = kasan_reset_tag((void *)info->access_addr);
 467         u8 tag = get_tag((void *)info->access_addr);
 468
 469         print_error_description(info);
 470         if (addr_has_metadata(addr))
 471                 kasan_print_tags(tag, info->first_bad_addr);
 472         pr_err("\n");
 473
 474         if (addr_has_metadata(addr)) {
 475                 print_address_description(addr, tag, info);
 476                 print_memory_metadata(info->first_bad_addr);
 477         } else {
 478                 dump_stack_lvl(KERN_ERR);
 479         }
 480 }
 481
 482 static void complete_report_info(struct kasan_report_info *info)
 483 {
 484         void *addr = kasan_reset_tag((void *)info->access_addr);
 485         struct slab *slab;
 486
 487         if (info->type == KASAN_REPORT_ACCESS)
 488                 info->first_bad_addr = kasan_find_first_bad_addr(
 489                                         (void *)info->access_addr, info->access_size);
 490         else
 491                 info->first_bad_addr = addr;
 492
 493         slab = kasan_addr_to_slab(addr);
 494         if (slab) {
 495                 info->cache = slab->slab_cache;
 496                 info->object = nearest_obj(info->cache, slab, addr);
 497
 498                 /* Try to determine allocation size based on the metadata. */
 499                 info->alloc_size = kasan_get_alloc_size(info->object, info->cache);
 500                 /* Fallback to the object size if failed. */
 501                 if (!info->alloc_size)
 502                         info->alloc_size = info->cache->object_size;
 503         } else
 504                 info->cache = info->object = NULL;
 505
 506         switch (info->type) {
 507         case KASAN_REPORT_INVALID_FREE:
 508                 info->bug_type = "invalid-free";
 509                 break;
 510         case KASAN_REPORT_DOUBLE_FREE:
 511                 info->bug_type = "double-free";
 512                 break;
 513         default:
 514                 /* bug_type filled in by kasan_complete_mode_report_info. */
 515                 break;
 516         }
 517
 518         /* Fill in mode-specific report info fields. */
 519         kasan_complete_mode_report_info(info);
 520 }
 521
 522 void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_type type)
 523 {
 524         unsigned long flags;
 525         struct kasan_report_info info;
 526
 527         /*
 528          * Do not check report_suppressed_sw(), as an invalid-free cannot be
 529          * caused by accessing poisoned memory and thus should not be suppressed
 530          * by kasan_disable/enable_current() critical sections.
 531          *
 532          * Note that for Hardware Tag-Based KASAN, kasan_report_invalid_free()
 533          * is triggered by explicit tag checks and not by the ones performed by
 534          * the CPU. Thus, reporting invalid-free is not suppressed as well.
 535          */
 536         if (unlikely(!report_enabled()))
 537                 return;
 538
 539         start_report(&flags, true);
 540
 541         memset(&info, 0, sizeof(info));
 542         info.type = type;
 543         info.access_addr = ptr;
 544         info.access_size = 0;
 545         info.is_write = false;
 546         info.ip = ip;
 547
 548         complete_report_info(&info);
 549
 550         print_report(&info);
 551
 552         /*
 553          * Invalid free is considered a "write" since the allocator's metadata
 554          * updates involves writes.
 555          */
 556         end_report(&flags, ptr, true);
 557 }
 558
 559 /*
 560  * kasan_report() is the only reporting function that uses
 561  * user_access_save/restore(): kasan_report_invalid_free() cannot be called
 562  * from a UACCESS region, and kasan_report_async() is not used on x86.
 563  */
 564 bool kasan_report(const void *addr, size_t size, bool is_write,
 565                         unsigned long ip)
 566 {
 567         bool ret = true;
 568         unsigned long ua_flags = user_access_save();
 569         unsigned long irq_flags;
 570         struct kasan_report_info info;
 571
 572         if (unlikely(report_suppressed_sw()) || unlikely(!report_enabled())) {
 573                 ret = false;
 574                 goto out;
 575         }
 576
 577         start_report(&irq_flags, true);
 578
 579         memset(&info, 0, sizeof(info));
 580         info.type = KASAN_REPORT_ACCESS;
 581         info.access_addr = addr;
 582         info.access_size = size;
 583         info.is_write = is_write;
 584         info.ip = ip;
 585
 586         complete_report_info(&info);
 587
 588         print_report(&info);
 589
 590         end_report(&irq_flags, (void *)addr, is_write);
 591
 592 out:
 593         user_access_restore(ua_flags);
 594
 595         return ret;
 596 }
 597
 598 #ifdef CONFIG_KASAN_HW_TAGS
 599 void kasan_report_async(void)
 600 {
 601         unsigned long flags;
 602
 603         /*
 604          * Do not check report_suppressed_sw(), as
 605          * kasan_disable/enable_current() critical sections do not affect
 606          * Hardware Tag-Based KASAN.
 607          */
 608         if (unlikely(!report_enabled()))
 609                 return;
 610
 611         start_report(&flags, false);
 612         pr_err("BUG: KASAN: invalid-access\n");
 613         pr_err("Asynchronous fault: no details available\n");
 614         pr_err("\n");
 615         dump_stack_lvl(KERN_ERR);
 616         /*
 617          * Conservatively set is_write=true, because no details are available.
 618          * In this mode, kasan.fault=panic_on_write is like kasan.fault=panic.
 619          */
 620         end_report(&flags, NULL, true);
 621 }
 622 #endif /* CONFIG_KASAN_HW_TAGS */
 623
 624 #ifdef CONFIG_KASAN_INLINE
 625 /*
 626  * With CONFIG_KASAN_INLINE, accesses to bogus pointers (outside the high
 627  * canonical half of the address space) cause out-of-bounds shadow memory reads
 628  * before the actual access. For addresses in the low canonical half of the
 629  * address space, as well as most non-canonical addresses, that out-of-bounds
 630  * shadow memory access lands in the non-canonical part of the address space.
 631  * Help the user figure out what the original bogus pointer was.
 632  */
 633 void kasan_non_canonical_hook(unsigned long addr)
 634 {
 635         unsigned long orig_addr;
 636         const char *bug_type;
 637
 638         if (addr < KASAN_SHADOW_OFFSET)
 639                 return;
 640
 641         orig_addr = (addr - KASAN_SHADOW_OFFSET) << KASAN_SHADOW_SCALE_SHIFT;
 642         /*
 643          * For faults near the shadow address for NULL, we can be fairly certain
 644          * that this is a KASAN shadow memory access.
 645          * For faults that correspond to shadow for low canonical addresses, we
 646          * can still be pretty sure - that shadow region is a fairly narrow
 647          * chunk of the non-canonical address space.
 648          * But faults that look like shadow for non-canonical addresses are a
 649          * really large chunk of the address space. In that case, we still
 650          * print the decoded address, but make it clear that this is not
 651          * necessarily what's actually going on.
 652          */
 653         if (orig_addr < PAGE_SIZE)
 654                 bug_type = "null-ptr-deref";
 655         else if (orig_addr < TASK_SIZE)
 656                 bug_type = "probably user-memory-access";
 657         else
 658                 bug_type = "maybe wild-memory-access";
 659         pr_alert("KASAN: %s in range [0x%016lx-0x%016lx]\n", bug_type,
 660                  orig_addr, orig_addr + KASAN_GRANULE_SIZE - 1);
 661 }
 662 #endif