* Author: Andrey Ryabinin <a.ryabinin@samsung.com>
*/
-#define pr_fmt(fmt) "kasan test: %s " fmt, __func__
-
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/kasan.h>
#include <asm/page.h>
+#include <kunit/test.h>
+
#include "../mm/kasan/kasan.h"
-#define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_SHADOW_SCALE_SIZE)
+#define OOB_TAG_OFF (IS_ENABLED(CONFIG_KASAN_GENERIC) ? 0 : KASAN_GRANULE_SIZE)
/*
* We assign some test results to these globals to make sure the tests
* are not eliminated as dead code.
*/
-int kasan_int_result;
void *kasan_ptr_result;
+int kasan_int_result;
-/*
- * Note: test functions are marked noinline so that their names appear in
- * reports.
- */
+static struct kunit_resource resource;
+static struct kunit_kasan_expectation fail_data;
+static bool multishot;
+
+static int kasan_test_init(struct kunit *test)
+{
+ /*
+ * Temporarily enable multi-shot mode and set panic_on_warn=0.
+ * Otherwise, we'd only get a report for the first case.
+ */
+ multishot = kasan_save_enable_multi_shot();
+
+ return 0;
+}
+
+static void kasan_test_exit(struct kunit *test)
+{
+ kasan_restore_multi_shot(multishot);
+}
-static noinline void __init kmalloc_oob_right(void)
+/**
+ * KUNIT_EXPECT_KASAN_FAIL() - Causes a test failure when the expression does
+ * not cause a KASAN error. This uses a KUnit resource named "kasan_data." Do
+ * Do not use this name for a KUnit resource outside here.
+ *
+ */
+#define KUNIT_EXPECT_KASAN_FAIL(test, condition) do { \
+ fail_data.report_expected = true; \
+ fail_data.report_found = false; \
+ kunit_add_named_resource(test, \
+ NULL, \
+ NULL, \
+ &resource, \
+ "kasan_data", &fail_data); \
+ condition; \
+ KUNIT_EXPECT_EQ(test, \
+ fail_data.report_expected, \
+ fail_data.report_found); \
+} while (0)
+
+static void kmalloc_oob_right(struct kunit *test)
{
char *ptr;
size_t size = 123;
- pr_info("out-of-bounds to right\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- ptr[size + OOB_TAG_OFF] = 'x';
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[size + OOB_TAG_OFF] = 'x');
kfree(ptr);
}
-static noinline void __init kmalloc_oob_left(void)
+static void kmalloc_oob_left(struct kunit *test)
{
char *ptr;
size_t size = 15;
- pr_info("out-of-bounds to left\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
- *ptr = *(ptr - 1);
+ KUNIT_EXPECT_KASAN_FAIL(test, *ptr = *(ptr - 1));
kfree(ptr);
}
-static noinline void __init kmalloc_node_oob_right(void)
+static void kmalloc_node_oob_right(struct kunit *test)
{
char *ptr;
size_t size = 4096;
- pr_info("kmalloc_node(): out-of-bounds to right\n");
ptr = kmalloc_node(size, GFP_KERNEL, 0);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
- ptr[size] = 0;
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[size] = 0);
kfree(ptr);
}
-#ifdef CONFIG_SLUB
-static noinline void __init kmalloc_pagealloc_oob_right(void)
+static void kmalloc_pagealloc_oob_right(struct kunit *test)
{
char *ptr;
size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
+ if (!IS_ENABLED(CONFIG_SLUB)) {
+ kunit_info(test, "CONFIG_SLUB is not enabled.");
+ return;
+ }
+
/* Allocate a chunk that does not fit into a SLUB cache to trigger
* the page allocator fallback.
*/
- pr_info("kmalloc pagealloc allocation: out-of-bounds to right\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- ptr[size + OOB_TAG_OFF] = 0;
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[size + OOB_TAG_OFF] = 0);
kfree(ptr);
}
-static noinline void __init kmalloc_pagealloc_uaf(void)
+static void kmalloc_pagealloc_uaf(struct kunit *test)
{
char *ptr;
size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
- pr_info("kmalloc pagealloc allocation: use-after-free\n");
- ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
+ if (!IS_ENABLED(CONFIG_SLUB)) {
+ kunit_info(test, "CONFIG_SLUB is not enabled.");
return;
}
+ ptr = kmalloc(size, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+
kfree(ptr);
- ptr[0] = 0;
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[0] = 0);
}
-static noinline void __init kmalloc_pagealloc_invalid_free(void)
+static void kmalloc_pagealloc_invalid_free(struct kunit *test)
{
char *ptr;
size_t size = KMALLOC_MAX_CACHE_SIZE + 10;
- pr_info("kmalloc pagealloc allocation: invalid-free\n");
- ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
+ if (!IS_ENABLED(CONFIG_SLUB)) {
+ kunit_info(test, "CONFIG_SLUB is not enabled.");
return;
}
- kfree(ptr + 1);
+ ptr = kmalloc(size, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, kfree(ptr + 1));
}
-#endif
-static noinline void __init kmalloc_large_oob_right(void)
+static void kmalloc_large_oob_right(struct kunit *test)
{
char *ptr;
size_t size = KMALLOC_MAX_CACHE_SIZE - 256;
/* Allocate a chunk that is large enough, but still fits into a slab
* and does not trigger the page allocator fallback in SLUB.
*/
- pr_info("kmalloc large allocation: out-of-bounds to right\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
- ptr[size] = 0;
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[size] = 0);
kfree(ptr);
}
-static noinline void __init kmalloc_oob_krealloc_more(void)
+static void kmalloc_oob_krealloc_more(struct kunit *test)
{
char *ptr1, *ptr2;
size_t size1 = 17;
size_t size2 = 19;
- pr_info("out-of-bounds after krealloc more\n");
ptr1 = kmalloc(size1, GFP_KERNEL);
- ptr2 = krealloc(ptr1, size2, GFP_KERNEL);
- if (!ptr1 || !ptr2) {
- pr_err("Allocation failed\n");
- kfree(ptr1);
- kfree(ptr2);
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
- ptr2[size2 + OOB_TAG_OFF] = 'x';
+ ptr2 = krealloc(ptr1, size2, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size2 + OOB_TAG_OFF] = 'x');
kfree(ptr2);
}
-static noinline void __init kmalloc_oob_krealloc_less(void)
+static void kmalloc_oob_krealloc_less(struct kunit *test)
{
char *ptr1, *ptr2;
size_t size1 = 17;
size_t size2 = 15;
- pr_info("out-of-bounds after krealloc less\n");
ptr1 = kmalloc(size1, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
+
ptr2 = krealloc(ptr1, size2, GFP_KERNEL);
- if (!ptr1 || !ptr2) {
- pr_err("Allocation failed\n");
- kfree(ptr1);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr2[size2 + OOB_TAG_OFF] = 'x');
+ kfree(ptr2);
+}
+
+static void kmalloc_oob_16(struct kunit *test)
+{
+ struct {
+ u64 words[2];
+ } *ptr1, *ptr2;
+
+ /* This test is specifically crafted for the generic mode. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
return;
}
- ptr2[size2 + OOB_TAG_OFF] = 'x';
+ ptr1 = kmalloc(sizeof(*ptr1) - 3, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
+ ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
+ kfree(ptr1);
kfree(ptr2);
}
-static noinline void __init kmalloc_oob_16(void)
+static void kmalloc_uaf_16(struct kunit *test)
{
struct {
u64 words[2];
} *ptr1, *ptr2;
- pr_info("kmalloc out-of-bounds for 16-bytes access\n");
- ptr1 = kmalloc(sizeof(*ptr1) - 3, GFP_KERNEL);
+ ptr1 = kmalloc(sizeof(*ptr1), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
+
ptr2 = kmalloc(sizeof(*ptr2), GFP_KERNEL);
- if (!ptr1 || !ptr2) {
- pr_err("Allocation failed\n");
- kfree(ptr1);
- kfree(ptr2);
- return;
- }
- *ptr1 = *ptr2;
- kfree(ptr1);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
kfree(ptr2);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, *ptr1 = *ptr2);
+ kfree(ptr1);
}
-static noinline void __init kmalloc_oob_memset_2(void)
+static void kmalloc_oob_memset_2(struct kunit *test)
{
char *ptr;
size_t size = 8;
- pr_info("out-of-bounds in memset2\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- memset(ptr + 7 + OOB_TAG_OFF, 0, 2);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + 7 + OOB_TAG_OFF, 0, 2));
kfree(ptr);
}
-static noinline void __init kmalloc_oob_memset_4(void)
+static void kmalloc_oob_memset_4(struct kunit *test)
{
char *ptr;
size_t size = 8;
- pr_info("out-of-bounds in memset4\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- memset(ptr + 5 + OOB_TAG_OFF, 0, 4);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + 5 + OOB_TAG_OFF, 0, 4));
kfree(ptr);
}
-static noinline void __init kmalloc_oob_memset_8(void)
+static void kmalloc_oob_memset_8(struct kunit *test)
{
char *ptr;
size_t size = 8;
- pr_info("out-of-bounds in memset8\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- memset(ptr + 1 + OOB_TAG_OFF, 0, 8);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + 1 + OOB_TAG_OFF, 0, 8));
kfree(ptr);
}
-static noinline void __init kmalloc_oob_memset_16(void)
+static void kmalloc_oob_memset_16(struct kunit *test)
{
char *ptr;
size_t size = 16;
- pr_info("out-of-bounds in memset16\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- memset(ptr + 1 + OOB_TAG_OFF, 0, 16);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + 1 + OOB_TAG_OFF, 0, 16));
kfree(ptr);
}
-static noinline void __init kmalloc_oob_in_memset(void)
+static void kmalloc_oob_in_memset(struct kunit *test)
{
char *ptr;
size_t size = 666;
- pr_info("out-of-bounds in memset\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- memset(ptr, 0, size + 5 + OOB_TAG_OFF);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr, 0, size + 5 + OOB_TAG_OFF));
kfree(ptr);
}
-static noinline void __init kmalloc_memmove_invalid_size(void)
+static void kmalloc_memmove_invalid_size(struct kunit *test)
{
char *ptr;
size_t size = 64;
volatile size_t invalid_size = -2;
- pr_info("invalid size in memmove\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
memset((char *)ptr, 0, 64);
- memmove((char *)ptr, (char *)ptr + 4, invalid_size);
+
+ KUNIT_EXPECT_KASAN_FAIL(test,
+ memmove((char *)ptr, (char *)ptr + 4, invalid_size));
kfree(ptr);
}
-static noinline void __init kmalloc_uaf(void)
+static void kmalloc_uaf(struct kunit *test)
{
char *ptr;
size_t size = 10;
- pr_info("use-after-free\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
kfree(ptr);
- *(ptr + 8) = 'x';
+ KUNIT_EXPECT_KASAN_FAIL(test, *(ptr + 8) = 'x');
}
-static noinline void __init kmalloc_uaf_memset(void)
+static void kmalloc_uaf_memset(struct kunit *test)
{
char *ptr;
size_t size = 33;
- pr_info("use-after-free in memset\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
kfree(ptr);
- memset(ptr, 0, size);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr, 0, size));
}
-static noinline void __init kmalloc_uaf2(void)
+static void kmalloc_uaf2(struct kunit *test)
{
char *ptr1, *ptr2;
size_t size = 43;
- pr_info("use-after-free after another kmalloc\n");
ptr1 = kmalloc(size, GFP_KERNEL);
- if (!ptr1) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr1);
kfree(ptr1);
+
ptr2 = kmalloc(size, GFP_KERNEL);
- if (!ptr2) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr2);
+
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr1[40] = 'x');
+ KUNIT_EXPECT_PTR_NE(test, ptr1, ptr2);
- ptr1[40] = 'x';
- if (ptr1 == ptr2)
- pr_err("Could not detect use-after-free: ptr1 == ptr2\n");
kfree(ptr2);
}
-static noinline void __init kfree_via_page(void)
+static void kfree_via_page(struct kunit *test)
{
char *ptr;
size_t size = 8;
struct page *page;
unsigned long offset;
- pr_info("invalid-free false positive (via page)\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
page = virt_to_page(ptr);
offset = offset_in_page(ptr);
kfree(page_address(page) + offset);
}
-static noinline void __init kfree_via_phys(void)
+static void kfree_via_phys(struct kunit *test)
{
char *ptr;
size_t size = 8;
phys_addr_t phys;
- pr_info("invalid-free false positive (via phys)\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
phys = virt_to_phys(ptr);
kfree(phys_to_virt(phys));
}
-static noinline void __init kmem_cache_oob(void)
+static void kmem_cache_oob(struct kunit *test)
{
char *p;
size_t size = 200;
struct kmem_cache *cache = kmem_cache_create("test_cache",
size, 0,
0, NULL);
- if (!cache) {
- pr_err("Cache allocation failed\n");
- return;
- }
- pr_info("out-of-bounds in kmem_cache_alloc\n");
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
p = kmem_cache_alloc(cache, GFP_KERNEL);
if (!p) {
- pr_err("Allocation failed\n");
+ kunit_err(test, "Allocation failed: %s\n", __func__);
kmem_cache_destroy(cache);
return;
}
- *p = p[size + OOB_TAG_OFF];
-
+ KUNIT_EXPECT_KASAN_FAIL(test, *p = p[size + OOB_TAG_OFF]);
kmem_cache_free(cache, p);
kmem_cache_destroy(cache);
}
-static noinline void __init memcg_accounted_kmem_cache(void)
+static void memcg_accounted_kmem_cache(struct kunit *test)
{
int i;
char *p;
struct kmem_cache *cache;
cache = kmem_cache_create("test_cache", size, 0, SLAB_ACCOUNT, NULL);
- if (!cache) {
- pr_err("Cache allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
- pr_info("allocate memcg accounted object\n");
/*
* Several allocations with a delay to allow for lazy per memcg kmem
* cache creation.
static char global_array[10];
-static noinline void __init kasan_global_oob(void)
+static void kasan_global_oob(struct kunit *test)
{
volatile int i = 3;
char *p = &global_array[ARRAY_SIZE(global_array) + i];
- pr_info("out-of-bounds global variable\n");
- *(volatile char *)p;
-}
-
-static noinline void __init kasan_stack_oob(void)
-{
- char stack_array[10];
- volatile int i = OOB_TAG_OFF;
- char *p = &stack_array[ARRAY_SIZE(stack_array) + i];
+ /* Only generic mode instruments globals. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
- pr_info("out-of-bounds on stack\n");
- *(volatile char *)p;
+ KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
-static noinline void __init ksize_unpoisons_memory(void)
+static void ksize_unpoisons_memory(struct kunit *test)
{
char *ptr;
size_t size = 123, real_size;
- pr_info("ksize() unpoisons the whole allocated chunk\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
real_size = ksize(ptr);
/* This access doesn't trigger an error. */
ptr[size] = 'x';
/* This one does. */
- ptr[real_size] = 'y';
+ KUNIT_EXPECT_KASAN_FAIL(test, ptr[real_size] = 'y');
kfree(ptr);
}
-static noinline void __init copy_user_test(void)
+static void kasan_stack_oob(struct kunit *test)
{
- char *kmem;
- char __user *usermem;
- size_t size = 10;
- int unused;
-
- kmem = kmalloc(size, GFP_KERNEL);
- if (!kmem)
- return;
+ char stack_array[10];
+ volatile int i = OOB_TAG_OFF;
+ char *p = &stack_array[ARRAY_SIZE(stack_array) + i];
- usermem = (char __user *)vm_mmap(NULL, 0, PAGE_SIZE,
- PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_ANONYMOUS | MAP_PRIVATE, 0);
- if (IS_ERR(usermem)) {
- pr_err("Failed to allocate user memory\n");
- kfree(kmem);
+ if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
+ kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
return;
}
- pr_info("out-of-bounds in copy_from_user()\n");
- unused = copy_from_user(kmem, usermem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in copy_to_user()\n");
- unused = copy_to_user(usermem, kmem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in __copy_from_user()\n");
- unused = __copy_from_user(kmem, usermem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in __copy_to_user()\n");
- unused = __copy_to_user(usermem, kmem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in __copy_from_user_inatomic()\n");
- unused = __copy_from_user_inatomic(kmem, usermem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in __copy_to_user_inatomic()\n");
- unused = __copy_to_user_inatomic(usermem, kmem, size + 1 + OOB_TAG_OFF);
-
- pr_info("out-of-bounds in strncpy_from_user()\n");
- unused = strncpy_from_user(kmem, usermem, size + 1 + OOB_TAG_OFF);
-
- vm_munmap((unsigned long)usermem, PAGE_SIZE);
- kfree(kmem);
+ KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
-static noinline void __init kasan_alloca_oob_left(void)
+static void kasan_alloca_oob_left(struct kunit *test)
{
volatile int i = 10;
char alloca_array[i];
char *p = alloca_array - 1;
- pr_info("out-of-bounds to left on alloca\n");
- *(volatile char *)p;
+ /* Only generic mode instruments dynamic allocas. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
+
+ if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
+ kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
+ return;
+ }
+
+ KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
-static noinline void __init kasan_alloca_oob_right(void)
+static void kasan_alloca_oob_right(struct kunit *test)
{
volatile int i = 10;
char alloca_array[i];
char *p = alloca_array + i;
- pr_info("out-of-bounds to right on alloca\n");
- *(volatile char *)p;
+ /* Only generic mode instruments dynamic allocas. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required");
+ return;
+ }
+
+ if (!IS_ENABLED(CONFIG_KASAN_STACK)) {
+ kunit_info(test, "CONFIG_KASAN_STACK is not enabled");
+ return;
+ }
+
+ KUNIT_EXPECT_KASAN_FAIL(test, *(volatile char *)p);
}
-static noinline void __init kmem_cache_double_free(void)
+static void kmem_cache_double_free(struct kunit *test)
{
char *p;
size_t size = 200;
struct kmem_cache *cache;
cache = kmem_cache_create("test_cache", size, 0, 0, NULL);
- if (!cache) {
- pr_err("Cache allocation failed\n");
- return;
- }
- pr_info("double-free on heap object\n");
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
+
p = kmem_cache_alloc(cache, GFP_KERNEL);
if (!p) {
- pr_err("Allocation failed\n");
+ kunit_err(test, "Allocation failed: %s\n", __func__);
kmem_cache_destroy(cache);
return;
}
kmem_cache_free(cache, p);
- kmem_cache_free(cache, p);
+ KUNIT_EXPECT_KASAN_FAIL(test, kmem_cache_free(cache, p));
kmem_cache_destroy(cache);
}
-static noinline void __init kmem_cache_invalid_free(void)
+static void kmem_cache_invalid_free(struct kunit *test)
{
char *p;
size_t size = 200;
cache = kmem_cache_create("test_cache", size, 0, SLAB_TYPESAFE_BY_RCU,
NULL);
- if (!cache) {
- pr_err("Cache allocation failed\n");
- return;
- }
- pr_info("invalid-free of heap object\n");
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, cache);
+
p = kmem_cache_alloc(cache, GFP_KERNEL);
if (!p) {
- pr_err("Allocation failed\n");
+ kunit_err(test, "Allocation failed: %s\n", __func__);
kmem_cache_destroy(cache);
return;
}
/* Trigger invalid free, the object doesn't get freed */
- kmem_cache_free(cache, p + 1);
+ KUNIT_EXPECT_KASAN_FAIL(test, kmem_cache_free(cache, p + 1));
/*
* Properly free the object to prevent the "Objects remaining in
kmem_cache_destroy(cache);
}
-static noinline void __init kasan_memchr(void)
+static void kasan_memchr(struct kunit *test)
{
char *ptr;
size_t size = 24;
- pr_info("out-of-bounds in memchr\n");
- ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
- if (!ptr)
+ /* See https://bugzilla.kernel.org/show_bug.cgi?id=206337 */
+ if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) {
+ kunit_info(test,
+ "str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT");
return;
+ }
+
+ if (OOB_TAG_OFF)
+ size = round_up(size, OOB_TAG_OFF);
+
+ ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+
+ KUNIT_EXPECT_KASAN_FAIL(test,
+ kasan_ptr_result = memchr(ptr, '1', size + 1));
- kasan_ptr_result = memchr(ptr, '1', size + 1);
kfree(ptr);
}
-static noinline void __init kasan_memcmp(void)
+static void kasan_memcmp(struct kunit *test)
{
char *ptr;
size_t size = 24;
int arr[9];
- pr_info("out-of-bounds in memcmp\n");
- ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
- if (!ptr)
+ /* See https://bugzilla.kernel.org/show_bug.cgi?id=206337 */
+ if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) {
+ kunit_info(test,
+ "str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT");
return;
+ }
+
+ if (OOB_TAG_OFF)
+ size = round_up(size, OOB_TAG_OFF);
+ ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
memset(arr, 0, sizeof(arr));
- kasan_int_result = memcmp(ptr, arr, size + 1);
+
+ KUNIT_EXPECT_KASAN_FAIL(test,
+ kasan_int_result = memcmp(ptr, arr, size+1));
kfree(ptr);
}
-static noinline void __init kasan_strings(void)
+static void kasan_strings(struct kunit *test)
{
char *ptr;
size_t size = 24;
- pr_info("use-after-free in strchr\n");
- ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
- if (!ptr)
+ /* See https://bugzilla.kernel.org/show_bug.cgi?id=206337 */
+ if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) {
+ kunit_info(test,
+ "str* functions are not instrumented with CONFIG_AMD_MEM_ENCRYPT");
return;
+ }
+
+ ptr = kmalloc(size, GFP_KERNEL | __GFP_ZERO);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
kfree(ptr);
* will likely point to zeroed byte.
*/
ptr += 16;
- kasan_ptr_result = strchr(ptr, '1');
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_ptr_result = strchr(ptr, '1'));
+
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_ptr_result = strrchr(ptr, '1'));
- pr_info("use-after-free in strrchr\n");
- kasan_ptr_result = strrchr(ptr, '1');
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strcmp(ptr, "2"));
- pr_info("use-after-free in strcmp\n");
- kasan_int_result = strcmp(ptr, "2");
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strncmp(ptr, "2", 1));
- pr_info("use-after-free in strncmp\n");
- kasan_int_result = strncmp(ptr, "2", 1);
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strlen(ptr));
- pr_info("use-after-free in strlen\n");
- kasan_int_result = strlen(ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = strnlen(ptr, 1));
+}
- pr_info("use-after-free in strnlen\n");
- kasan_int_result = strnlen(ptr, 1);
+static void kasan_bitops_modify(struct kunit *test, int nr, void *addr)
+{
+ KUNIT_EXPECT_KASAN_FAIL(test, set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, clear_bit_unlock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __clear_bit_unlock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __change_bit(nr, addr));
}
-static noinline void __init kasan_bitops(void)
+static void kasan_bitops_test_and_modify(struct kunit *test, int nr, void *addr)
{
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_set_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_set_bit_lock(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_clear_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, test_and_change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, __test_and_change_bit(nr, addr));
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result = test_bit(nr, addr));
+
+#if defined(clear_bit_unlock_is_negative_byte)
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result =
+ clear_bit_unlock_is_negative_byte(nr, addr));
+#endif
+}
+
+static void kasan_bitops_generic(struct kunit *test)
+{
+ long *bits;
+
+ /* This test is specifically crafted for the generic mode. */
+ if (!IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_GENERIC required\n");
+ return;
+ }
+
/*
* Allocate 1 more byte, which causes kzalloc to round up to 16-bytes;
* this way we do not actually corrupt other memory.
*/
- long *bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
- if (!bits)
- return;
+ bits = kzalloc(sizeof(*bits) + 1, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
/*
* Below calls try to access bit within allocated memory; however, the
* below accesses are still out-of-bounds, since bitops are defined to
* operate on the whole long the bit is in.
*/
- pr_info("out-of-bounds in set_bit\n");
- set_bit(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in __set_bit\n");
- __set_bit(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in clear_bit\n");
- clear_bit(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in __clear_bit\n");
- __clear_bit(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in clear_bit_unlock\n");
- clear_bit_unlock(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in __clear_bit_unlock\n");
- __clear_bit_unlock(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in change_bit\n");
- change_bit(BITS_PER_LONG, bits);
-
- pr_info("out-of-bounds in __change_bit\n");
- __change_bit(BITS_PER_LONG, bits);
+ kasan_bitops_modify(test, BITS_PER_LONG, bits);
/*
* Below calls try to access bit beyond allocated memory.
*/
- pr_info("out-of-bounds in test_and_set_bit\n");
- test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
-
- pr_info("out-of-bounds in __test_and_set_bit\n");
- __test_and_set_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
-
- pr_info("out-of-bounds in test_and_set_bit_lock\n");
- test_and_set_bit_lock(BITS_PER_LONG + BITS_PER_BYTE, bits);
+ kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, bits);
- pr_info("out-of-bounds in test_and_clear_bit\n");
- test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
+ kfree(bits);
+}
- pr_info("out-of-bounds in __test_and_clear_bit\n");
- __test_and_clear_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
+static void kasan_bitops_tags(struct kunit *test)
+{
+ long *bits;
- pr_info("out-of-bounds in test_and_change_bit\n");
- test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
+ /* This test is specifically crafted for the tag-based mode. */
+ if (IS_ENABLED(CONFIG_KASAN_GENERIC)) {
+ kunit_info(test, "CONFIG_KASAN_SW_TAGS required\n");
+ return;
+ }
- pr_info("out-of-bounds in __test_and_change_bit\n");
- __test_and_change_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
+ /* Allocation size will be rounded to up granule size, which is 16. */
+ bits = kzalloc(sizeof(*bits), GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, bits);
- pr_info("out-of-bounds in test_bit\n");
- kasan_int_result = test_bit(BITS_PER_LONG + BITS_PER_BYTE, bits);
+ /* Do the accesses past the 16 allocated bytes. */
+ kasan_bitops_modify(test, BITS_PER_LONG, &bits[1]);
+ kasan_bitops_test_and_modify(test, BITS_PER_LONG + BITS_PER_BYTE, &bits[1]);
-#if defined(clear_bit_unlock_is_negative_byte)
- pr_info("out-of-bounds in clear_bit_unlock_is_negative_byte\n");
- kasan_int_result = clear_bit_unlock_is_negative_byte(BITS_PER_LONG +
- BITS_PER_BYTE, bits);
-#endif
kfree(bits);
}
-static noinline void __init kmalloc_double_kzfree(void)
+static void kmalloc_double_kzfree(struct kunit *test)
{
char *ptr;
size_t size = 16;
- pr_info("double-free (kfree_sensitive)\n");
ptr = kmalloc(size, GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
kfree_sensitive(ptr);
- kfree_sensitive(ptr);
+ KUNIT_EXPECT_KASAN_FAIL(test, kfree_sensitive(ptr));
}
-#ifdef CONFIG_KASAN_VMALLOC
-static noinline void __init vmalloc_oob(void)
+static void vmalloc_oob(struct kunit *test)
{
void *area;
- pr_info("vmalloc out-of-bounds\n");
+ if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
+ kunit_info(test, "CONFIG_KASAN_VMALLOC is not enabled.");
+ return;
+ }
/*
* We have to be careful not to hit the guard page.
* The MMU will catch that and crash us.
*/
area = vmalloc(3000);
- if (!area) {
- pr_err("Allocation failed\n");
- return;
- }
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, area);
- ((volatile char *)area)[3100];
+ KUNIT_EXPECT_KASAN_FAIL(test, ((volatile char *)area)[3100]);
vfree(area);
}
-#else
-static void __init vmalloc_oob(void) {}
-#endif
-
-static struct kasan_rcu_info {
- int i;
- struct rcu_head rcu;
-} *global_rcu_ptr;
-
-static noinline void __init kasan_rcu_reclaim(struct rcu_head *rp)
-{
- struct kasan_rcu_info *fp = container_of(rp,
- struct kasan_rcu_info, rcu);
-
- kfree(fp);
- fp->i = 1;
-}
-
-static noinline void __init kasan_rcu_uaf(void)
-{
- struct kasan_rcu_info *ptr;
- pr_info("use-after-free in kasan_rcu_reclaim\n");
- ptr = kmalloc(sizeof(struct kasan_rcu_info), GFP_KERNEL);
- if (!ptr) {
- pr_err("Allocation failed\n");
- return;
- }
-
- global_rcu_ptr = rcu_dereference_protected(ptr, NULL);
- call_rcu(&global_rcu_ptr->rcu, kasan_rcu_reclaim);
-}
-
-static int __init kmalloc_tests_init(void)
-{
- /*
- * Temporarily enable multi-shot mode. Otherwise, we'd only get a
- * report for the first case.
- */
- bool multishot = kasan_save_enable_multi_shot();
-
- kmalloc_oob_right();
- kmalloc_oob_left();
- kmalloc_node_oob_right();
-#ifdef CONFIG_SLUB
- kmalloc_pagealloc_oob_right();
- kmalloc_pagealloc_uaf();
- kmalloc_pagealloc_invalid_free();
-#endif
- kmalloc_large_oob_right();
- kmalloc_oob_krealloc_more();
- kmalloc_oob_krealloc_less();
- kmalloc_oob_16();
- kmalloc_oob_in_memset();
- kmalloc_oob_memset_2();
- kmalloc_oob_memset_4();
- kmalloc_oob_memset_8();
- kmalloc_oob_memset_16();
- kmalloc_memmove_invalid_size();
- kmalloc_uaf();
- kmalloc_uaf_memset();
- kmalloc_uaf2();
- kfree_via_page();
- kfree_via_phys();
- kmem_cache_oob();
- memcg_accounted_kmem_cache();
- kasan_stack_oob();
- kasan_global_oob();
- kasan_alloca_oob_left();
- kasan_alloca_oob_right();
- ksize_unpoisons_memory();
- copy_user_test();
- kmem_cache_double_free();
- kmem_cache_invalid_free();
- kasan_memchr();
- kasan_memcmp();
- kasan_strings();
- kasan_bitops();
- kmalloc_double_kzfree();
- vmalloc_oob();
- kasan_rcu_uaf();
-
- kasan_restore_multi_shot(multishot);
-
- return -EAGAIN;
-}
+static struct kunit_case kasan_kunit_test_cases[] = {
+ KUNIT_CASE(kmalloc_oob_right),
+ KUNIT_CASE(kmalloc_oob_left),
+ KUNIT_CASE(kmalloc_node_oob_right),
+ KUNIT_CASE(kmalloc_pagealloc_oob_right),
+ KUNIT_CASE(kmalloc_pagealloc_uaf),
+ KUNIT_CASE(kmalloc_pagealloc_invalid_free),
+ KUNIT_CASE(kmalloc_large_oob_right),
+ KUNIT_CASE(kmalloc_oob_krealloc_more),
+ KUNIT_CASE(kmalloc_oob_krealloc_less),
+ KUNIT_CASE(kmalloc_oob_16),
+ KUNIT_CASE(kmalloc_uaf_16),
+ KUNIT_CASE(kmalloc_oob_in_memset),
+ KUNIT_CASE(kmalloc_oob_memset_2),
+ KUNIT_CASE(kmalloc_oob_memset_4),
+ KUNIT_CASE(kmalloc_oob_memset_8),
+ KUNIT_CASE(kmalloc_oob_memset_16),
+ KUNIT_CASE(kmalloc_memmove_invalid_size),
+ KUNIT_CASE(kmalloc_uaf),
+ KUNIT_CASE(kmalloc_uaf_memset),
+ KUNIT_CASE(kmalloc_uaf2),
+ KUNIT_CASE(kfree_via_page),
+ KUNIT_CASE(kfree_via_phys),
+ KUNIT_CASE(kmem_cache_oob),
+ KUNIT_CASE(memcg_accounted_kmem_cache),
+ KUNIT_CASE(kasan_global_oob),
+ KUNIT_CASE(kasan_stack_oob),
+ KUNIT_CASE(kasan_alloca_oob_left),
+ KUNIT_CASE(kasan_alloca_oob_right),
+ KUNIT_CASE(ksize_unpoisons_memory),
+ KUNIT_CASE(kmem_cache_double_free),
+ KUNIT_CASE(kmem_cache_invalid_free),
+ KUNIT_CASE(kasan_memchr),
+ KUNIT_CASE(kasan_memcmp),
+ KUNIT_CASE(kasan_strings),
+ KUNIT_CASE(kasan_bitops_generic),
+ KUNIT_CASE(kasan_bitops_tags),
+ KUNIT_CASE(kmalloc_double_kzfree),
+ KUNIT_CASE(vmalloc_oob),
+ {}
+};
+
+static struct kunit_suite kasan_kunit_test_suite = {
+ .name = "kasan",
+ .init = kasan_test_init,
+ .test_cases = kasan_kunit_test_cases,
+ .exit = kasan_test_exit,
+};
+
+kunit_test_suite(kasan_kunit_test_suite);
-module_init(kmalloc_tests_init);
MODULE_LICENSE("GPL");
projects / linux-2.6-microblaze.git / blobdiff