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This KUnit next update for Linux 6.2-rc1 consists of several enhancements, fixes, clean-ups, documentation updates, improvements to logging and KTAP compliance of KUnit test output: - log numbers in decimal and hex - parse KTAP compliant test output - allow conditionally exposing static symbols to tests when KUNIT is enabled - make static symbols visible during kunit testing - clean-ups to remove unused structure definition -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAmOXnPYACgkQCwJExA0N Qxwf9RAAwdBKxgPZuKZ40v69Jm8YhaO3vyKUkyYRH59/HQGFUHMA2f2ONez4krEX iXPgBFQ+7pB63FdgQi2HSg2z/u3xY02AaGgZGXDuNJDmg2xYjNDfZ0GjN6tuavlN Liz01DGZkjZoVVXM6oV2xT8woBg/0BbdkKNL1OBO9RBZFHzwDryRzfXmQb8cKlNr S+tkeZTlCA/s7UW2LNj4VlTzn6wgni4Y9gSk4wbQmSGWn3OX3rHaqAb7GiZ/yPGb 1WjbMeE8FwyydLU40aOZZ8V6AJRiw5VGPJyFzWJyWZ21xOgN9Z95b+I36z8RXraA i/wnazO/FJsrhzvKL83rQkrSW6bpmVY+jGvk+L6deFM6Ro/vEWHJ4DgyKsIdMiJy gUM1Q69szptq+ZRHGrZWPlVONBkBXMOL+fePbCbGcMzlaEAS/zsFYW9IBKcvLzwP uHzzMS/cMmSUq52ZIyl9jhHQFVSoErCpJwQjAaZBQpYXPmE7yLcZItxnCaSUQTay bRwyps5ph5md0oJTTFJKZ4Zx5FJ2ItjbC4y9BIexb9gYRDdRq723ivDoVENZl/Zk DFIV95AY+mSxadS5vFagwWwX0ZN0KFKxeM8Tw7VTimal/0Sbglqp+oflsuKFD6JQ b5HUixYifKMbWxkH5xrUb8NdjmBj561TYa8U4N+j3oOiaPYu5Ss= =UQNn -----END PGP SIGNATURE----- Merge tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull KUnit updates from Shuah Khan: "Several enhancements, fixes, clean-ups, documentation updates, improvements to logging and KTAP compliance of KUnit test output: - log numbers in decimal and hex - parse KTAP compliant test output - allow conditionally exposing static symbols to tests when KUNIT is enabled - make static symbols visible during kunit testing - clean-ups to remove unused structure definition" * tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits) Documentation: dev-tools: Clarify requirements for result description apparmor: test: make static symbols visible during kunit testing kunit: add macro to allow conditionally exposing static symbols to tests kunit: tool: make parser preserve whitespace when printing test log Documentation: kunit: Fix "How Do I Use This" / "Next Steps" sections kunit: tool: don't include KTAP headers and the like in the test log kunit: improve KTAP compliance of KUnit test output kunit: tool: parse KTAP compliant test output mm: slub: test: Use the kunit_get_current_test() function kunit: Use the static key when retrieving the current test kunit: Provide a static key to check if KUnit is actively running tests kunit: tool: make --json do nothing if --raw_ouput is set kunit: tool: tweak error message when no KTAP found kunit: remove KUNIT_INIT_MEM_ASSERTION macro Documentation: kunit: Remove redundant 'tips.rst' page Documentation: KUnit: reword description of assertions Documentation: KUnit: make usage.rst a superset of tips.rst, remove duplication kunit: eliminate KUNIT_INIT_*_ASSERT_STRUCT macros kunit: tool: remove redundant file.close() call in unit test kunit: tool: unit tests all check parser errors, standardize formatting a bit ...
190 lines
4.3 KiB
C
190 lines
4.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <kunit/test.h>
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#include <kunit/test-bug.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include "../mm/slab.h"
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static struct kunit_resource resource;
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static int slab_errors;
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/*
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* Wrapper function for kmem_cache_create(), which reduces 2 parameters:
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* 'align' and 'ctor', and sets SLAB_SKIP_KFENCE flag to avoid getting an
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* object from kfence pool, where the operation could be caught by both
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* our test and kfence sanity check.
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*/
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static struct kmem_cache *test_kmem_cache_create(const char *name,
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unsigned int size, slab_flags_t flags)
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{
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struct kmem_cache *s = kmem_cache_create(name, size, 0,
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(flags | SLAB_NO_USER_FLAGS), NULL);
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s->flags |= SLAB_SKIP_KFENCE;
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return s;
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}
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static void test_clobber_zone(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_RZ_alloc", 64,
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SLAB_RED_ZONE);
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u8 *p = kmem_cache_alloc(s, GFP_KERNEL);
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kasan_disable_current();
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p[64] = 0x12;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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kasan_enable_current();
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kmem_cache_free(s, p);
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kmem_cache_destroy(s);
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}
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#ifndef CONFIG_KASAN
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static void test_next_pointer(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_next_ptr_free",
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64, SLAB_POISON);
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u8 *p = kmem_cache_alloc(s, GFP_KERNEL);
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unsigned long tmp;
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unsigned long *ptr_addr;
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kmem_cache_free(s, p);
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ptr_addr = (unsigned long *)(p + s->offset);
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tmp = *ptr_addr;
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p[s->offset] = 0x12;
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/*
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* Expecting three errors.
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* One for the corrupted freechain and the other one for the wrong
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* count of objects in use. The third error is fixing broken cache.
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*/
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 3, slab_errors);
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/*
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* Try to repair corrupted freepointer.
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* Still expecting two errors. The first for the wrong count
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* of objects in use.
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* The second error is for fixing broken cache.
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*/
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*ptr_addr = tmp;
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slab_errors = 0;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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/*
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* Previous validation repaired the count of objects in use.
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* Now expecting no error.
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*/
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slab_errors = 0;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 0, slab_errors);
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kmem_cache_destroy(s);
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}
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static void test_first_word(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_1th_word_free",
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64, SLAB_POISON);
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u8 *p = kmem_cache_alloc(s, GFP_KERNEL);
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kmem_cache_free(s, p);
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*p = 0x78;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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kmem_cache_destroy(s);
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}
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static void test_clobber_50th_byte(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_50th_word_free",
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64, SLAB_POISON);
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u8 *p = kmem_cache_alloc(s, GFP_KERNEL);
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kmem_cache_free(s, p);
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p[50] = 0x9a;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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kmem_cache_destroy(s);
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}
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#endif
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static void test_clobber_redzone_free(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_RZ_free", 64,
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SLAB_RED_ZONE);
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u8 *p = kmem_cache_alloc(s, GFP_KERNEL);
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kasan_disable_current();
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kmem_cache_free(s, p);
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p[64] = 0xab;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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kasan_enable_current();
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kmem_cache_destroy(s);
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}
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static void test_kmalloc_redzone_access(struct kunit *test)
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{
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struct kmem_cache *s = test_kmem_cache_create("TestSlub_RZ_kmalloc", 32,
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SLAB_KMALLOC|SLAB_STORE_USER|SLAB_RED_ZONE);
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u8 *p = kmalloc_trace(s, GFP_KERNEL, 18);
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kasan_disable_current();
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/* Suppress the -Warray-bounds warning */
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OPTIMIZER_HIDE_VAR(p);
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p[18] = 0xab;
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p[19] = 0xab;
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validate_slab_cache(s);
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KUNIT_EXPECT_EQ(test, 2, slab_errors);
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kasan_enable_current();
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kmem_cache_free(s, p);
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kmem_cache_destroy(s);
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}
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static int test_init(struct kunit *test)
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{
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slab_errors = 0;
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kunit_add_named_resource(test, NULL, NULL, &resource,
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"slab_errors", &slab_errors);
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return 0;
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}
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static struct kunit_case test_cases[] = {
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KUNIT_CASE(test_clobber_zone),
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#ifndef CONFIG_KASAN
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KUNIT_CASE(test_next_pointer),
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KUNIT_CASE(test_first_word),
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KUNIT_CASE(test_clobber_50th_byte),
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#endif
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KUNIT_CASE(test_clobber_redzone_free),
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KUNIT_CASE(test_kmalloc_redzone_access),
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{}
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};
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static struct kunit_suite test_suite = {
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.name = "slub_test",
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.init = test_init,
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.test_cases = test_cases,
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};
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kunit_test_suite(test_suite);
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MODULE_LICENSE("GPL");
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