1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
5 * Author: Andrey Ryabinin <a.ryabinin@samsung.com>
6 */
7
8 #include <linux/bitops.h>
9 #include <linux/delay.h>
10 #include <linux/kasan.h>
11 #include <linux/kernel.h>
12 #include <linux/mm.h>
13 #include <linux/mman.h>
14 #include <linux/module.h>
15 #include <linux/printk.h>
16 #include <linux/random.h>
17 #include <linux/slab.h>
18 #include <linux/string.h>
19 #include <linux/uaccess.h>
20 #include <linux/io.h>
21 #include <linux/vmalloc.h>
22
23 #include <asm/page.h>
24
25 #include <kunit/test.h>
26
27 #include "../mm/kasan/kasan.h"
28
29 #define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_GRANULE_SIZE)
30
31 /*
32 * Some tests use these global variables to store return values from function
33 * calls that could otherwise be eliminated by the compiler as dead code.
34 */
35 void *kasan_ptr_result;
36 int kasan_int_result;
37
38 static struct kunit_resource resource;
39 static struct kunit_kasan_expectation fail_data;
40 static bool multishot;
41
42 /*
43 * Temporarily enable multi-shot mode. Otherwise, KASAN would only report the
44 * first detected bug and panic the kernel if panic_on_warn is enabled. For
45 * hardware tag-based KASAN also allow tag checking to be reenabled for each
46 * test, see the comment for KUNIT_EXPECT_KASAN_FAIL().
47 */
kasan_test_init(struct kunit * test)48 static int kasan_test_init(struct kunit *test)
49 {
50 if (!kasan_enabled()) {
51 kunit_err(test, "can't run KASAN tests with KASAN disabled");
52 return -1;
53 }
54
55 multishot = kasan_save_enable_multi_shot();
56 fail_data.report_found = false;
57 kunit_add_named_resource(test, NULL, NULL, &resource,
58 "kasan_data", &fail_data);
59 return 0;
60 }
61
kasan_test_exit(struct kunit * test)62 static void kasan_test_exit(struct kunit *test)
63 {
64 kasan_restore_multi_shot(multishot);
65 KUNIT_EXPECT_FALSE(test, fail_data.report_found);
66 }
67
68 /**
69 * KUNIT_EXPECT_KASAN_FAIL() - check that the executed expression produces a
70 * KASAN report; causes a test failure otherwise. This relies on a KUnit
71 * resource named "kasan_data". Do not use this name for KUnit resources
72 * outside of KASAN tests.
73 *
74 * For hardware tag-based KASAN in sync mode, when a tag fault happens, tag
75 * checking is auto-disabled. When this happens, this test handler reenables
76 * tag checking. As tag checking can be only disabled or enabled per CPU,
77 * this handler disables migration (preemption).
78 *
79 * Since the compiler doesn't see that the expression can change the fail_data
80 * fields, it can reorder or optimize away the accesses to those fields.
81 * Use READ/WRITE_ONCE() for the accesses and compiler barriers around the
82 * expression to prevent that.
83 *
84 * In between KUNIT_EXPECT_KASAN_FAIL checks, fail_data.report_found is kept as
85 * false. This allows detecting KASAN reports that happen outside of the checks
86 * by asserting !fail_data.report_found at the start of KUNIT_EXPECT_KASAN_FAIL
87 * and in kasan_test_exit.
88 */
89 #define KUNIT_EXPECT_KASAN_FAIL(test, expression) do { \
90 if (IS_ENABLED(CONFIG_KASAN_HW_TAGS) && \
91 kasan_sync_fault_possible()) \
92 migrate_disable(); \
93 KUNIT_EXPECT_FALSE(test, READ_ONCE(fail_data.report_found)); \
94 barrier(); \
95 expression; \
96 barrier(); \
97 if (!READ_ONCE(fail_data.report_found)) { \
98 KUNIT_FAIL(test, KUNIT_SUBTEST_INDENT "KASAN failure " \
99 "expected in \"" #expression \
100 "\", but none occurred"); \
101 } \
102 if (IS_ENABLED(CONFIG_KASAN_HW_TAGS)) { \
103 if (READ_ONCE(fail_data.report_found)) \
104 kasan_enable_tagging_sync(); \
105 migrate_enable(); \
106 } \
107 WRITE_ONCE(fail_data.report_found, false); \
108 } while (0)
109
110 #define KASAN_TEST_NEEDS_CONFIG_ON(test, config) do { \
111 if (!IS_ENABLED(config)) \
112 kunit_skip((test), "Test requires " #config "=y"); \
113 } while (0)
114
115 #define KASAN_TEST_NEEDS_CONFIG_OFF(test, config) do { \
116 if (IS_ENABLED(config)) \
117 kunit_skip((test), "Test requires " #config "=n"); \
118 } while (0)
119
kmalloc_oob_right(struct kunit * test)120 static void kmalloc_oob_right(struct kunit *test)
121 {
122 char *ptr;
123 size_t size = 128 - KASAN_GRANULE_SIZE - 5;
124
125 ptr = kmalloc(size, GFP_KERNEL);
126 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
127
128 /*
129 * An unaligned access past the requested kmalloc size.
130 * Only generic KASAN can precisely detect these.
131 */
132 if (IS_ENABLED(CONFIG_KASAN_GENERIC))
133 KUNIT_EXPECT_KASAN_FAIL(test, ptr[size] = 'x');
134
135 /*
136 * An aligned access into the first out-of-bounds granule that falls
137 * within the aligned kmalloc object.
138 */
139 KUNIT_EXPECT_KASAN_FAIL(test, ptr[size + 5] = 'y');
140
141 /* Out-of-bounds access past the aligned kmalloc object. */
142 KUNIT_EXPECT_KASAN_FAIL(test, ptr[0] =
143 ptr[size + KASAN_GRANULE_SIZE + 5]);
144
145 kfree(ptr);
146 }
147
kmalloc_oob_left(struct kunit * test)148 static void kmalloc_oob_left(struct kunit *test)
149 {
150 char *ptr;
151 size_t size = 15;
152
153 ptr = kmalloc(size, GFP_KERNEL);
154 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
155
156 KUNIT_EXPECT_KASAN_FAIL(test, *ptr = *(ptr - 1));
157 kfree(ptr);
158 }
159
kmalloc_node_oob_right(struct kunit * test)160 static void kmalloc_node_oob_right(struct kunit *test)
161 {
162 char *ptr;
163 size_t size = 4096;
164
165 ptr = kmalloc_node(size, GFP_KERNEL, 0);
166 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
167
168 KUNIT_EXPECT_KASAN_FAIL(test, ptr[0] = ptr[size]);
169 kfree(ptr);
170 }
171
172 /*
173 * These kmalloc_pagealloc_* tests try allocating a memory chunk that doesn't
174 * fit into a slab cache and therefore is allocated via the page allocator
175 * fallback. Since this kind of fallback is only implemented for SLUB, these
176 * tests are limited to that allocator.
177 */
kmalloc_pagealloc_oob_right(struct kunit * test)178 static void kmalloc_pagealloc_oob_right(struct kunit *test)
179 {
180 char *ptr;
181 size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
182
183 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_SLUB);
184
185 ptr = kmalloc(size, GFP_KERNEL);
186 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
187
188 KUNIT_EXPECT_KASAN_FAIL(test, ptr[size + OOB_TAG_OFF] = 0);
189
190 kfree(ptr);
191 }
192
kmalloc_pagealloc_uaf(struct kunit * test)193 static void kmalloc_pagealloc_uaf(struct kunit *test)
194 {
195 char *ptr;
196 size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
197
198 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_SLUB);
199
200 ptr = kmalloc(size, GFP_KERNEL);
201 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
202 kfree(ptr);
203
204 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[0]);
205 }
206
kmalloc_pagealloc_invalid_free(struct kunit * test)207 static void kmalloc_pagealloc_invalid_free(struct kunit *test)
208 {
209 char *ptr;
210 size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
211
212 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_SLUB);
213
214 ptr = kmalloc(size, GFP_KERNEL);
215 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
216
217 KUNIT_EXPECT_KASAN_FAIL(test, kfree(ptr + 1));
218 }
219
pagealloc_oob_right(struct kunit * test)220 static void pagealloc_oob_right(struct kunit *test)
221 {
222 char *ptr;
223 struct page *pages;
224 size_t order = 4;
225 size_t size = (1UL << (PAGE_SHIFT + order));
226
227 /*
228 * With generic KASAN page allocations have no redzones, thus
229 * out-of-bounds detection is not guaranteed.
230 * See https://bugzilla.kernel.org/show_bug.cgi?id=210503.
231 */
232 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
233
234 pages = alloc_pages(GFP_KERNEL, order);
235 ptr = page_address(pages);
236 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
237
238 KUNIT_EXPECT_KASAN_FAIL(test, ptr[0] = ptr[size]);
239 free_pages((unsigned long)ptr, order);
240 }
241
pagealloc_uaf(struct kunit * test)242 static void pagealloc_uaf(struct kunit *test)
243 {
244 char *ptr;
245 struct page *pages;
246 size_t order = 4;
247
248 pages = alloc_pages(GFP_KERNEL, order);
249 ptr = page_address(pages);
250 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
251 free_pages((unsigned long)ptr, order);
252
253 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[0]);
254 }
255
kmalloc_large_oob_right(struct kunit * test)256 static void kmalloc_large_oob_right(struct kunit *test)
257 {
258 char *ptr;
259 size_t size = KMALLOC_MAX_CACHE_SIZE - 256;
260
261 /*
262 * Allocate a chunk that is large enough, but still fits into a slab
263 * and does not trigger the page allocator fallback in SLUB.
264 */
265 ptr = kmalloc(size, GFP_KERNEL);
266 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
267
268 KUNIT_EXPECT_KASAN_FAIL(test, ptr[size] = 0);
269 kfree(ptr);
270 }
271
krealloc_more_oob_helper(struct kunit * test,size_t size1,size_t size2)272 static void krealloc_more_oob_helper(struct kunit *test,
273 size_t size1, size_t size2)
274 {
275 char *ptr1, *ptr2;
276 size_t middle;
277
278 KUNIT_ASSERT_LT(test, size1, size2);
279 middle = size1 + (size2 - size1) / 2;
280
281 ptr1 = kmalloc(size1, GFP_KERNEL);
282 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
283
284 ptr2 = krealloc(ptr1, size2, GFP_KERNEL);
285 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
286
287 /* All offsets up to size2 must be accessible. */
288 ptr2[size1 - 1] = 'x';
289 ptr2[size1] = 'x';
290 ptr2[middle] = 'x';
291 ptr2[size2 - 1] = 'x';
292
293 /* Generic mode is precise, so unaligned size2 must be inaccessible. */
294 if (IS_ENABLED(CONFIG_KASAN_GENERIC))
295 KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size2] = 'x');
296
297 /* For all modes first aligned offset after size2 must be inaccessible. */
298 KUNIT_EXPECT_KASAN_FAIL(test,
299 ptr2[round_up(size2, KASAN_GRANULE_SIZE)] = 'x');
300
301 kfree(ptr2);
302 }
303
krealloc_less_oob_helper(struct kunit * test,size_t size1,size_t size2)304 static void krealloc_less_oob_helper(struct kunit *test,
305 size_t size1, size_t size2)
306 {
307 char *ptr1, *ptr2;
308 size_t middle;
309
310 KUNIT_ASSERT_LT(test, size2, size1);
311 middle = size2 + (size1 - size2) / 2;
312
313 ptr1 = kmalloc(size1, GFP_KERNEL);
314 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
315
316 ptr2 = krealloc(ptr1, size2, GFP_KERNEL);
317 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
318
319 /* Must be accessible for all modes. */
320 ptr2[size2 - 1] = 'x';
321
322 /* Generic mode is precise, so unaligned size2 must be inaccessible. */
323 if (IS_ENABLED(CONFIG_KASAN_GENERIC))
324 KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size2] = 'x');
325
326 /* For all modes first aligned offset after size2 must be inaccessible. */
327 KUNIT_EXPECT_KASAN_FAIL(test,
328 ptr2[round_up(size2, KASAN_GRANULE_SIZE)] = 'x');
329
330 /*
331 * For all modes all size2, middle, and size1 should land in separate
332 * granules and thus the latter two offsets should be inaccessible.
333 */
334 KUNIT_EXPECT_LE(test, round_up(size2, KASAN_GRANULE_SIZE),
335 round_down(middle, KASAN_GRANULE_SIZE));
336 KUNIT_EXPECT_LE(test, round_up(middle, KASAN_GRANULE_SIZE),
337 round_down(size1, KASAN_GRANULE_SIZE));
338 KUNIT_EXPECT_KASAN_FAIL(test, ptr2[middle] = 'x');
339 KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size1 - 1] = 'x');
340 KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size1] = 'x');
341
342 kfree(ptr2);
343 }
344
krealloc_more_oob(struct kunit * test)345 static void krealloc_more_oob(struct kunit *test)
346 {
347 krealloc_more_oob_helper(test, 201, 235);
348 }
349
krealloc_less_oob(struct kunit * test)350 static void krealloc_less_oob(struct kunit *test)
351 {
352 krealloc_less_oob_helper(test, 235, 201);
353 }
354
krealloc_pagealloc_more_oob(struct kunit * test)355 static void krealloc_pagealloc_more_oob(struct kunit *test)
356 {
357 /* page_alloc fallback in only implemented for SLUB. */
358 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_SLUB);
359
360 krealloc_more_oob_helper(test, KMALLOC_MAX_CACHE_SIZE + 201,
361 KMALLOC_MAX_CACHE_SIZE + 235);
362 }
363
krealloc_pagealloc_less_oob(struct kunit * test)364 static void krealloc_pagealloc_less_oob(struct kunit *test)
365 {
366 /* page_alloc fallback in only implemented for SLUB. */
367 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_SLUB);
368
369 krealloc_less_oob_helper(test, KMALLOC_MAX_CACHE_SIZE + 235,
370 KMALLOC_MAX_CACHE_SIZE + 201);
371 }
372
373 /*
374 * Check that krealloc() detects a use-after-free, returns NULL,
375 * and doesn't unpoison the freed object.
376 */
krealloc_uaf(struct kunit * test)377 static void krealloc_uaf(struct kunit *test)
378 {
379 char *ptr1, *ptr2;
380 int size1 = 201;
381 int size2 = 235;
382
383 ptr1 = kmalloc(size1, GFP_KERNEL);
384 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
385 kfree(ptr1);
386
387 KUNIT_EXPECT_KASAN_FAIL(test, ptr2 = krealloc(ptr1, size2, GFP_KERNEL));
388 KUNIT_ASSERT_PTR_EQ(test, (void *)ptr2, NULL);
389 KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)ptr1);
390 }
391
kmalloc_oob_16(struct kunit * test)392 static void kmalloc_oob_16(struct kunit *test)
393 {
394 struct {
395 u64 words[2];
396 } *ptr1, *ptr2;
397
398 /* This test is specifically crafted for the generic mode. */
399 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
400
401 ptr1 = kmalloc(sizeof(*ptr1) - 3, GFP_KERNEL);
402 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
403
404 ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
405 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
406
407 KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
408 kfree(ptr1);
409 kfree(ptr2);
410 }
411
kmalloc_uaf_16(struct kunit * test)412 static void kmalloc_uaf_16(struct kunit *test)
413 {
414 struct {
415 u64 words[2];
416 } *ptr1, *ptr2;
417
418 ptr1 = kmalloc(sizeof(*ptr1), GFP_KERNEL);
419 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
420
421 ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
422 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
423 kfree(ptr2);
424
425 KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
426 kfree(ptr1);
427 }
428
429 /*
430 * Note: in the memset tests below, the written range touches both valid and
431 * invalid memory. This makes sure that the instrumentation does not only check
432 * the starting address but the whole range.
433 */
434
kmalloc_oob_memset_2(struct kunit * test)435 static void kmalloc_oob_memset_2(struct kunit *test)
436 {
437 char *ptr;
438 size_t size = 128 - KASAN_GRANULE_SIZE;
439
440 ptr = kmalloc(size, GFP_KERNEL);
441 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
442
443 OPTIMIZER_HIDE_VAR(size);
444 KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 1, 0, 2));
445 kfree(ptr);
446 }
447
kmalloc_oob_memset_4(struct kunit * test)448 static void kmalloc_oob_memset_4(struct kunit *test)
449 {
450 char *ptr;
451 size_t size = 128 - KASAN_GRANULE_SIZE;
452
453 ptr = kmalloc(size, GFP_KERNEL);
454 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
455
456 OPTIMIZER_HIDE_VAR(size);
457 KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 3, 0, 4));
458 kfree(ptr);
459 }
460
kmalloc_oob_memset_8(struct kunit * test)461 static void kmalloc_oob_memset_8(struct kunit *test)
462 {
463 char *ptr;
464 size_t size = 128 - KASAN_GRANULE_SIZE;
465
466 ptr = kmalloc(size, GFP_KERNEL);
467 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
468
469 OPTIMIZER_HIDE_VAR(size);
470 KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 7, 0, 8));
471 kfree(ptr);
472 }
473
kmalloc_oob_memset_16(struct kunit * test)474 static void kmalloc_oob_memset_16(struct kunit *test)
475 {
476 char *ptr;
477 size_t size = 128 - KASAN_GRANULE_SIZE;
478
479 ptr = kmalloc(size, GFP_KERNEL);
480 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
481
482 OPTIMIZER_HIDE_VAR(size);
483 KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 15, 0, 16));
484 kfree(ptr);
485 }
486
kmalloc_oob_in_memset(struct kunit * test)487 static void kmalloc_oob_in_memset(struct kunit *test)
488 {
489 char *ptr;
490 size_t size = 128 - KASAN_GRANULE_SIZE;
491
492 ptr = kmalloc(size, GFP_KERNEL);
493 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
494
495 OPTIMIZER_HIDE_VAR(size);
496 KUNIT_EXPECT_KASAN_FAIL(test,
497 memset(ptr, 0, size + KASAN_GRANULE_SIZE));
498 kfree(ptr);
499 }
500
kmalloc_memmove_negative_size(struct kunit * test)501 static void kmalloc_memmove_negative_size(struct kunit *test)
502 {
503 char *ptr;
504 size_t size = 64;
505 size_t invalid_size = -2;
506
507 /*
508 * Hardware tag-based mode doesn't check memmove for negative size.
509 * As a result, this test introduces a side-effect memory corruption,
510 * which can result in a crash.
511 */
512 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_HW_TAGS);
513
514 ptr = kmalloc(size, GFP_KERNEL);
515 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
516
517 memset((char *)ptr, 0, 64);
518 OPTIMIZER_HIDE_VAR(invalid_size);
519 KUNIT_EXPECT_KASAN_FAIL(test,
520 memmove((char *)ptr, (char *)ptr + 4, invalid_size));
521 kfree(ptr);
522 }
523
kmalloc_memmove_invalid_size(struct kunit * test)524 static void kmalloc_memmove_invalid_size(struct kunit *test)
525 {
526 char *ptr;
527 size_t size = 64;
528 volatile size_t invalid_size = size;
529
530 ptr = kmalloc(size, GFP_KERNEL);
531 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
532
533 memset((char *)ptr, 0, 64);
534 KUNIT_EXPECT_KASAN_FAIL(test,
535 memmove((char *)ptr, (char *)ptr + 4, invalid_size));
536 kfree(ptr);
537 }
538
kmalloc_uaf(struct kunit * test)539 static void kmalloc_uaf(struct kunit *test)
540 {
541 char *ptr;
542 size_t size = 10;
543
544 ptr = kmalloc(size, GFP_KERNEL);
545 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
546
547 kfree(ptr);
548 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[8]);
549 }
550
kmalloc_uaf_memset(struct kunit * test)551 static void kmalloc_uaf_memset(struct kunit *test)
552 {
553 char *ptr;
554 size_t size = 33;
555
556 /*
557 * Only generic KASAN uses quarantine, which is required to avoid a
558 * kernel memory corruption this test causes.
559 */
560 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
561
562 ptr = kmalloc(size, GFP_KERNEL);
563 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
564
565 kfree(ptr);
566 KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr, 0, size));
567 }
568
kmalloc_uaf2(struct kunit * test)569 static void kmalloc_uaf2(struct kunit *test)
570 {
571 char *ptr1, *ptr2;
572 size_t size = 43;
573 int counter = 0;
574
575 again:
576 ptr1 = kmalloc(size, GFP_KERNEL);
577 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
578
579 kfree(ptr1);
580
581 ptr2 = kmalloc(size, GFP_KERNEL);
582 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
583
584 /*
585 * For tag-based KASAN ptr1 and ptr2 tags might happen to be the same.
586 * Allow up to 16 attempts at generating different tags.
587 */
588 if (!IS_ENABLED(CONFIG_KASAN_GENERIC) && ptr1 == ptr2 && counter++ < 16) {
589 kfree(ptr2);
590 goto again;
591 }
592
593 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr1)[40]);
594 KUNIT_EXPECT_PTR_NE(test, ptr1, ptr2);
595
596 kfree(ptr2);
597 }
598
kfree_via_page(struct kunit * test)599 static void kfree_via_page(struct kunit *test)
600 {
601 char *ptr;
602 size_t size = 8;
603 struct page *page;
604 unsigned long offset;
605
606 ptr = kmalloc(size, GFP_KERNEL);
607 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
608
609 page = virt_to_page(ptr);
610 offset = offset_in_page(ptr);
611 kfree(page_address(page) + offset);
612 }
613
kfree_via_phys(struct kunit * test)614 static void kfree_via_phys(struct kunit *test)
615 {
616 char *ptr;
617 size_t size = 8;
618 phys_addr_t phys;
619
620 ptr = kmalloc(size, GFP_KERNEL);
621 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
622
623 phys = virt_to_phys(ptr);
624 kfree(phys_to_virt(phys));
625 }
626
kmem_cache_oob(struct kunit * test)627 static void kmem_cache_oob(struct kunit *test)
628 {
629 char *p;
630 size_t size = 200;
631 struct kmem_cache *cache;
632
633 cache = kmem_cache_create("test_cache", size, 0, 0, NULL);
634 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
635
636 p = kmem_cache_alloc(cache, GFP_KERNEL);
637 if (!p) {
638 kunit_err(test, "Allocation failed: %s\n", __func__);
639 kmem_cache_destroy(cache);
640 return;
641 }
642
643 KUNIT_EXPECT_KASAN_FAIL(test, *p = p[size + OOB_TAG_OFF]);
644
645 kmem_cache_free(cache, p);
646 kmem_cache_destroy(cache);
647 }
648
kmem_cache_accounted(struct kunit * test)649 static void kmem_cache_accounted(struct kunit *test)
650 {
651 int i;
652 char *p;
653 size_t size = 200;
654 struct kmem_cache *cache;
655
656 cache = kmem_cache_create("test_cache", size, 0, SLAB_ACCOUNT, NULL);
657 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
658
659 /*
660 * Several allocations with a delay to allow for lazy per memcg kmem
661 * cache creation.
662 */
663 for (i = 0; i < 5; i++) {
664 p = kmem_cache_alloc(cache, GFP_KERNEL);
665 if (!p)
666 goto free_cache;
667
668 kmem_cache_free(cache, p);
669 msleep(100);
670 }
671
672 free_cache:
673 kmem_cache_destroy(cache);
674 }
675
kmem_cache_bulk(struct kunit * test)676 static void kmem_cache_bulk(struct kunit *test)
677 {
678 struct kmem_cache *cache;
679 size_t size = 200;
680 char *p[10];
681 bool ret;
682 int i;
683
684 cache = kmem_cache_create("test_cache", size, 0, 0, NULL);
685 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
686
687 ret = kmem_cache_alloc_bulk(cache, GFP_KERNEL, ARRAY_SIZE(p), (void **)&p);
688 if (!ret) {
689 kunit_err(test, "Allocation failed: %s\n", __func__);
690 kmem_cache_destroy(cache);
691 return;
692 }
693
694 for (i = 0; i < ARRAY_SIZE(p); i++)
695 p[i][0] = p[i][size - 1] = 42;
696
697 kmem_cache_free_bulk(cache, ARRAY_SIZE(p), (void **)&p);
698 kmem_cache_destroy(cache);
699 }
700
701 static char global_array[10];
702
kasan_global_oob(struct kunit * test)703 static void kasan_global_oob(struct kunit *test)
704 {
705 /*
706 * Deliberate out-of-bounds access. To prevent CONFIG_UBSAN_LOCAL_BOUNDS
707 * from failing here and panicking the kernel, access the array via a
708 * volatile pointer, which will prevent the compiler from being able to
709 * determine the array bounds.
710 *
711 * This access uses a volatile pointer to char (char *volatile) rather
712 * than the more conventional pointer to volatile char (volatile char *)
713 * because we want to prevent the compiler from making inferences about
714 * the pointer itself (i.e. its array bounds), not the data that it
715 * refers to.
716 */
717 char *volatile array = global_array;
718 char *p = &array[ARRAY_SIZE(global_array) + 3];
719
720 /* Only generic mode instruments globals. */
721 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
722
723 KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
724 }
725
726 /* Check that ksize() makes the whole object accessible. */
ksize_unpoisons_memory(struct kunit * test)727 static void ksize_unpoisons_memory(struct kunit *test)
728 {
729 char *ptr;
730 size_t size = 123, real_size;
731
732 ptr = kmalloc(size, GFP_KERNEL);
733 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
734 real_size = ksize(ptr);
735
736 /* This access shouldn't trigger a KASAN report. */
737 ptr[size] = 'x';
738
739 /* This one must. */
740 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[real_size]);
741
742 kfree(ptr);
743 }
744
745 /*
746 * Check that a use-after-free is detected by ksize() and via normal accesses
747 * after it.
748 */
ksize_uaf(struct kunit * test)749 static void ksize_uaf(struct kunit *test)
750 {
751 char *ptr;
752 int size = 128 - KASAN_GRANULE_SIZE;
753
754 ptr = kmalloc(size, GFP_KERNEL);
755 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
756 kfree(ptr);
757
758 KUNIT_EXPECT_KASAN_FAIL(test, ksize(ptr));
759 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[0]);
760 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)ptr)[size]);
761 }
762
kasan_stack_oob(struct kunit * test)763 static void kasan_stack_oob(struct kunit *test)
764 {
765 char stack_array[10];
766 /* See comment in kasan_global_oob. */
767 char *volatile array = stack_array;
768 char *p = &array[ARRAY_SIZE(stack_array) + OOB_TAG_OFF];
769
770 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_STACK);
771
772 KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
773 }
774
kasan_alloca_oob_left(struct kunit * test)775 static void kasan_alloca_oob_left(struct kunit *test)
776 {
777 volatile int i = 10;
778 char alloca_array[i];
779 /* See comment in kasan_global_oob. */
780 char *volatile array = alloca_array;
781 char *p = array - 1;
782
783 /* Only generic mode instruments dynamic allocas. */
784 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
785 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_STACK);
786
787 KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
788 }
789
kasan_alloca_oob_right(struct kunit * test)790 static void kasan_alloca_oob_right(struct kunit *test)
791 {
792 volatile int i = 10;
793 char alloca_array[i];
794 /* See comment in kasan_global_oob. */
795 char *volatile array = alloca_array;
796 char *p = array + i;
797
798 /* Only generic mode instruments dynamic allocas. */
799 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
800 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_STACK);
801
802 KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
803 }
804
kmem_cache_double_free(struct kunit * test)805 static void kmem_cache_double_free(struct kunit *test)
806 {
807 char *p;
808 size_t size = 200;
809 struct kmem_cache *cache;
810
811 cache = kmem_cache_create("test_cache", size, 0, 0, NULL);
812 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
813
814 p = kmem_cache_alloc(cache, GFP_KERNEL);
815 if (!p) {
816 kunit_err(test, "Allocation failed: %s\n", __func__);
817 kmem_cache_destroy(cache);
818 return;
819 }
820
821 kmem_cache_free(cache, p);
822 KUNIT_EXPECT_KASAN_FAIL(test, kmem_cache_free(cache, p));
823 kmem_cache_destroy(cache);
824 }
825
kmem_cache_invalid_free(struct kunit * test)826 static void kmem_cache_invalid_free(struct kunit *test)
827 {
828 char *p;
829 size_t size = 200;
830 struct kmem_cache *cache;
831
832 cache = kmem_cache_create("test_cache", size, 0, SLAB_TYPESAFE_BY_RCU,
833 NULL);
834 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
835
836 p = kmem_cache_alloc(cache, GFP_KERNEL);
837 if (!p) {
838 kunit_err(test, "Allocation failed: %s\n", __func__);
839 kmem_cache_destroy(cache);
840 return;
841 }
842
843 /* Trigger invalid free, the object doesn't get freed. */
844 KUNIT_EXPECT_KASAN_FAIL(test, kmem_cache_free(cache, p + 1));
845
846 /*
847 * Properly free the object to prevent the "Objects remaining in
848 * test_cache on __kmem_cache_shutdown" BUG failure.
849 */
850 kmem_cache_free(cache, p);
851
852 kmem_cache_destroy(cache);
853 }
854
kasan_memchr(struct kunit * test)855 static void kasan_memchr(struct kunit *test)
856 {
857 char *ptr;
858 size_t size = 24;
859
860 /*
861 * str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT.
862 * See https://bugzilla.kernel.org/show_bug.cgi?id=206337 for details.
863 */
864 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_AMD_MEM_ENCRYPT);
865
866 if (OOB_TAG_OFF)
867 size = round_up(size, OOB_TAG_OFF);
868
869 ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
870 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
871
872 OPTIMIZER_HIDE_VAR(size);
873 KUNIT_EXPECT_KASAN_FAIL(test,
874 kasan_ptr_result = memchr(ptr, '1', size + 1));
875
876 kfree(ptr);
877 }
878
kasan_memcmp(struct kunit * test)879 static void kasan_memcmp(struct kunit *test)
880 {
881 char *ptr;
882 size_t size = 24;
883 int arr[9];
884
885 /*
886 * str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT.
887 * See https://bugzilla.kernel.org/show_bug.cgi?id=206337 for details.
888 */
889 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_AMD_MEM_ENCRYPT);
890
891 if (OOB_TAG_OFF)
892 size = round_up(size, OOB_TAG_OFF);
893
894 ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
895 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
896 memset(arr, 0, sizeof(arr));
897
898 OPTIMIZER_HIDE_VAR(size);
899 KUNIT_EXPECT_KASAN_FAIL(test,
900 kasan_int_result = memcmp(ptr, arr, size+1));
901 kfree(ptr);
902 }
903
kasan_strings(struct kunit * test)904 static void kasan_strings(struct kunit *test)
905 {
906 char *ptr;
907 size_t size = 24;
908
909 /*
910 * str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT.
911 * See https://bugzilla.kernel.org/show_bug.cgi?id=206337 for details.
912 */
913 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_AMD_MEM_ENCRYPT);
914
915 ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
916 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
917
918 kfree(ptr);
919
920 /*
921 * Try to cause only 1 invalid access (less spam in dmesg).
922 * For that we need ptr to point to zeroed byte.
923 * Skip metadata that could be stored in freed object so ptr
924 * will likely point to zeroed byte.
925 */
926 ptr += 16;
927 KUNIT_EXPECT_KASAN_FAIL(test, kasan_ptr_result = strchr(ptr, '1'));
928
929 KUNIT_EXPECT_KASAN_FAIL(test, kasan_ptr_result = strrchr(ptr, '1'));
930
931 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strcmp(ptr, "2"));
932
933 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strncmp(ptr, "2", 1));
934
935 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strlen(ptr));
936
937 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strnlen(ptr, 1));
938 }
939
kasan_bitops_modify(struct kunit * test,int nr,void * addr)940 static void kasan_bitops_modify(struct kunit *test, int nr, void *addr)
941 {
942 KUNIT_EXPECT_KASAN_FAIL(test, set_bit(nr, addr));
943 KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(nr, addr));
944 KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(nr, addr));
945 KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(nr, addr));
946 KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(nr, addr));
947 KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(nr, addr));
948 KUNIT_EXPECT_KASAN_FAIL(test, change_bit(nr, addr));
949 KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(nr, addr));
950 }
951
kasan_bitops_test_and_modify(struct kunit * test,int nr,void * addr)952 static void kasan_bitops_test_and_modify(struct kunit *test, int nr, void *addr)
953 {
954 KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit(nr, addr));
955 KUNIT_EXPECT_KASAN_FAIL(test, __test_and_set_bit(nr, addr));
956 KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit_lock(nr, addr));
957 KUNIT_EXPECT_KASAN_FAIL(test, test_and_clear_bit(nr, addr));
958 KUNIT_EXPECT_KASAN_FAIL(test, __test_and_clear_bit(nr, addr));
959 KUNIT_EXPECT_KASAN_FAIL(test, test_and_change_bit(nr, addr));
960 KUNIT_EXPECT_KASAN_FAIL(test, __test_and_change_bit(nr, addr));
961 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = test_bit(nr, addr));
962
963 #if defined(clear_bit_unlock_is_negative_byte)
964 KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result =
965 clear_bit_unlock_is_negative_byte(nr, addr));
966 #endif
967 }
968
kasan_bitops_generic(struct kunit * test)969 static void kasan_bitops_generic(struct kunit *test)
970 {
971 long *bits;
972
973 /* This test is specifically crafted for the generic mode. */
974 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_GENERIC);
975
976 /*
977 * Allocate 1 more byte, which causes kzalloc to round up to 16 bytes;
978 * this way we do not actually corrupt other memory.
979 */
980 bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
981 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
982
983 /*
984 * Below calls try to access bit within allocated memory; however, the
985 * below accesses are still out-of-bounds, since bitops are defined to
986 * operate on the whole long the bit is in.
987 */
988 kasan_bitops_modify(test, BITS_PER_LONG, bits);
989
990 /*
991 * Below calls try to access bit beyond allocated memory.
992 */
993 kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, bits);
994
995 kfree(bits);
996 }
997
kasan_bitops_tags(struct kunit * test)998 static void kasan_bitops_tags(struct kunit *test)
999 {
1000 long *bits;
1001
1002 /* This test is specifically crafted for tag-based modes. */
1003 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
1004
1005 /* kmalloc-64 cache will be used and the last 16 bytes will be the redzone. */
1006 bits = kzalloc(48, GFP_KERNEL);
1007 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
1008
1009 /* Do the accesses past the 48 allocated bytes, but within the redone. */
1010 kasan_bitops_modify(test, BITS_PER_LONG, (void *)bits + 48);
1011 kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, (void *)bits + 48);
1012
1013 kfree(bits);
1014 }
1015
kmalloc_double_kzfree(struct kunit * test)1016 static void kmalloc_double_kzfree(struct kunit *test)
1017 {
1018 char *ptr;
1019 size_t size = 16;
1020
1021 ptr = kmalloc(size, GFP_KERNEL);
1022 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
1023
1024 kfree_sensitive(ptr);
1025 KUNIT_EXPECT_KASAN_FAIL(test, kfree_sensitive(ptr));
1026 }
1027
vmalloc_oob(struct kunit * test)1028 static void vmalloc_oob(struct kunit *test)
1029 {
1030 void *area;
1031
1032 KASAN_TEST_NEEDS_CONFIG_ON(test, CONFIG_KASAN_VMALLOC);
1033
1034 /*
1035 * We have to be careful not to hit the guard page.
1036 * The MMU will catch that and crash us.
1037 */
1038 area = vmalloc(3000);
1039 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, area);
1040
1041 KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)area)[3100]);
1042 vfree(area);
1043 }
1044
1045 /*
1046 * Check that the assigned pointer tag falls within the [KASAN_TAG_MIN,
1047 * KASAN_TAG_KERNEL) range (note: excluding the match-all tag) for tag-based
1048 * modes.
1049 */
match_all_not_assigned(struct kunit * test)1050 static void match_all_not_assigned(struct kunit *test)
1051 {
1052 char *ptr;
1053 struct page *pages;
1054 int i, size, order;
1055
1056 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
1057
1058 for (i = 0; i < 256; i++) {
1059 size = (get_random_int() % 1024) + 1;
1060 ptr = kmalloc(size, GFP_KERNEL);
1061 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
1062 KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);
1063 KUNIT_EXPECT_LT(test, (u8)get_tag(ptr), (u8)KASAN_TAG_KERNEL);
1064 kfree(ptr);
1065 }
1066
1067 for (i = 0; i < 256; i++) {
1068 order = (get_random_int() % 4) + 1;
1069 pages = alloc_pages(GFP_KERNEL, order);
1070 ptr = page_address(pages);
1071 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
1072 KUNIT_EXPECT_GE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_MIN);
1073 KUNIT_EXPECT_LT(test, (u8)get_tag(ptr), (u8)KASAN_TAG_KERNEL);
1074 free_pages((unsigned long)ptr, order);
1075 }
1076 }
1077
1078 /* Check that 0xff works as a match-all pointer tag for tag-based modes. */
match_all_ptr_tag(struct kunit * test)1079 static void match_all_ptr_tag(struct kunit *test)
1080 {
1081 char *ptr;
1082 u8 tag;
1083
1084 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
1085
1086 ptr = kmalloc(128, GFP_KERNEL);
1087 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
1088
1089 /* Backup the assigned tag. */
1090 tag = get_tag(ptr);
1091 KUNIT_EXPECT_NE(test, tag, (u8)KASAN_TAG_KERNEL);
1092
1093 /* Reset the tag to 0xff.*/
1094 ptr = set_tag(ptr, KASAN_TAG_KERNEL);
1095
1096 /* This access shouldn't trigger a KASAN report. */
1097 *ptr = 0;
1098
1099 /* Recover the pointer tag and free. */
1100 ptr = set_tag(ptr, tag);
1101 kfree(ptr);
1102 }
1103
1104 /* Check that there are no match-all memory tags for tag-based modes. */
match_all_mem_tag(struct kunit * test)1105 static void match_all_mem_tag(struct kunit *test)
1106 {
1107 char *ptr;
1108 int tag;
1109
1110 KASAN_TEST_NEEDS_CONFIG_OFF(test, CONFIG_KASAN_GENERIC);
1111
1112 ptr = kmalloc(128, GFP_KERNEL);
1113 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
1114 KUNIT_EXPECT_NE(test, (u8)get_tag(ptr), (u8)KASAN_TAG_KERNEL);
1115
1116 /* For each possible tag value not matching the pointer tag. */
1117 for (tag = KASAN_TAG_MIN; tag <= KASAN_TAG_KERNEL; tag++) {
1118 if (tag == get_tag(ptr))
1119 continue;
1120
1121 /* Mark the first memory granule with the chosen memory tag. */
1122 kasan_poison(ptr, KASAN_GRANULE_SIZE, (u8)tag, false);
1123
1124 /* This access must cause a KASAN report. */
1125 KUNIT_EXPECT_KASAN_FAIL(test, *ptr = 0);
1126 }
1127
1128 /* Recover the memory tag and free. */
1129 kasan_poison(ptr, KASAN_GRANULE_SIZE, get_tag(ptr), false);
1130 kfree(ptr);
1131 }
1132
1133 static struct kunit_case kasan_kunit_test_cases[] = {
1134 KUNIT_CASE(kmalloc_oob_right),
1135 KUNIT_CASE(kmalloc_oob_left),
1136 KUNIT_CASE(kmalloc_node_oob_right),
1137 KUNIT_CASE(kmalloc_pagealloc_oob_right),
1138 KUNIT_CASE(kmalloc_pagealloc_uaf),
1139 KUNIT_CASE(kmalloc_pagealloc_invalid_free),
1140 KUNIT_CASE(pagealloc_oob_right),
1141 KUNIT_CASE(pagealloc_uaf),
1142 KUNIT_CASE(kmalloc_large_oob_right),
1143 KUNIT_CASE(krealloc_more_oob),
1144 KUNIT_CASE(krealloc_less_oob),
1145 KUNIT_CASE(krealloc_pagealloc_more_oob),
1146 KUNIT_CASE(krealloc_pagealloc_less_oob),
1147 KUNIT_CASE(krealloc_uaf),
1148 KUNIT_CASE(kmalloc_oob_16),
1149 KUNIT_CASE(kmalloc_uaf_16),
1150 KUNIT_CASE(kmalloc_oob_in_memset),
1151 KUNIT_CASE(kmalloc_oob_memset_2),
1152 KUNIT_CASE(kmalloc_oob_memset_4),
1153 KUNIT_CASE(kmalloc_oob_memset_8),
1154 KUNIT_CASE(kmalloc_oob_memset_16),
1155 KUNIT_CASE(kmalloc_memmove_negative_size),
1156 KUNIT_CASE(kmalloc_memmove_invalid_size),
1157 KUNIT_CASE(kmalloc_uaf),
1158 KUNIT_CASE(kmalloc_uaf_memset),
1159 KUNIT_CASE(kmalloc_uaf2),
1160 KUNIT_CASE(kfree_via_page),
1161 KUNIT_CASE(kfree_via_phys),
1162 KUNIT_CASE(kmem_cache_oob),
1163 KUNIT_CASE(kmem_cache_accounted),
1164 KUNIT_CASE(kmem_cache_bulk),
1165 KUNIT_CASE(kasan_global_oob),
1166 KUNIT_CASE(kasan_stack_oob),
1167 KUNIT_CASE(kasan_alloca_oob_left),
1168 KUNIT_CASE(kasan_alloca_oob_right),
1169 KUNIT_CASE(ksize_unpoisons_memory),
1170 KUNIT_CASE(ksize_uaf),
1171 KUNIT_CASE(kmem_cache_double_free),
1172 KUNIT_CASE(kmem_cache_invalid_free),
1173 KUNIT_CASE(kasan_memchr),
1174 KUNIT_CASE(kasan_memcmp),
1175 KUNIT_CASE(kasan_strings),
1176 KUNIT_CASE(kasan_bitops_generic),
1177 KUNIT_CASE(kasan_bitops_tags),
1178 KUNIT_CASE(kmalloc_double_kzfree),
1179 KUNIT_CASE(vmalloc_oob),
1180 KUNIT_CASE(match_all_not_assigned),
1181 KUNIT_CASE(match_all_ptr_tag),
1182 KUNIT_CASE(match_all_mem_tag),
1183 {}
1184 };
1185
1186 static struct kunit_suite kasan_kunit_test_suite = {
1187 .name = "kasan",
1188 .init = kasan_test_init,
1189 .test_cases = kasan_kunit_test_cases,
1190 .exit = kasan_test_exit,
1191 };
1192
1193 kunit_test_suite(kasan_kunit_test_suite);
1194
1195 MODULE_LICENSE("GPL");
1196