summaryrefslogtreecommitdiffstats
path: root/mm/kasan
diff options
context:
space:
mode:
Diffstat (limited to 'mm/kasan')
-rw-r--r--mm/kasan/kasan.h1
-rw-r--r--mm/kasan/kasan_test.c39
-rw-r--r--mm/kasan/kasan_test_module.c2
-rw-r--r--mm/kasan/quarantine.c4
-rw-r--r--mm/kasan/report.c4
-rw-r--r--mm/kasan/report_generic.c6
-rw-r--r--mm/kasan/shadow.c2
7 files changed, 35 insertions, 23 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index d37831b851..8b06bab5c4 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h
@@ -562,7 +562,6 @@ void kasan_restore_multi_shot(bool enabled);
* code. Declared here to avoid warnings about missing declarations.
*/
-asmlinkage void kasan_unpoison_task_stack_below(const void *watermark);
void __asan_register_globals(void *globals, ssize_t size);
void __asan_unregister_globals(void *globals, ssize_t size);
void __asan_handle_no_return(void);
diff --git a/mm/kasan/kasan_test.c b/mm/kasan/kasan_test.c
index b61cc6a425..34515a106c 100644
--- a/mm/kasan/kasan_test.c
+++ b/mm/kasan/kasan_test.c
@@ -5,7 +5,7 @@
* Author: Andrey Ryabinin <a.ryabinin@samsung.com>
*/
-#define pr_fmt(fmt) "kasan_test: " fmt
+#define pr_fmt(fmt) "kasan: test: " fmt
#include <kunit/test.h>
#include <linux/bitops.h>
@@ -91,10 +91,11 @@ static void kasan_test_exit(struct kunit *test)
}
/**
- * KUNIT_EXPECT_KASAN_FAIL() - check that the executed expression produces a
- * KASAN report; causes a test failure otherwise. This relies on a KUnit
- * resource named "kasan_status". Do not use this name for KUnit resources
- * outside of KASAN tests.
+ * KUNIT_EXPECT_KASAN_FAIL - check that the executed expression produces a
+ * KASAN report; causes a KUnit test failure otherwise.
+ *
+ * @test: Currently executing KUnit test.
+ * @expression: Expression that must produce a KASAN report.
*
* For hardware tag-based KASAN, when a synchronous tag fault happens, tag
* checking is auto-disabled. When this happens, this test handler reenables
@@ -492,14 +493,17 @@ static void kmalloc_oob_memset_2(struct kunit *test)
{
char *ptr;
size_t size = 128 - KASAN_GRANULE_SIZE;
+ size_t memset_size = 2;
KASAN_TEST_NEEDS_CHECKED_MEMINTRINSICS(test);
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ OPTIMIZER_HIDE_VAR(ptr);
OPTIMIZER_HIDE_VAR(size);
- KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 1, 0, 2));
+ OPTIMIZER_HIDE_VAR(memset_size);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 1, 0, memset_size));
kfree(ptr);
}
@@ -507,14 +511,17 @@ static void kmalloc_oob_memset_4(struct kunit *test)
{
char *ptr;
size_t size = 128 - KASAN_GRANULE_SIZE;
+ size_t memset_size = 4;
KASAN_TEST_NEEDS_CHECKED_MEMINTRINSICS(test);
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ OPTIMIZER_HIDE_VAR(ptr);
OPTIMIZER_HIDE_VAR(size);
- KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 3, 0, 4));
+ OPTIMIZER_HIDE_VAR(memset_size);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 3, 0, memset_size));
kfree(ptr);
}
@@ -522,14 +529,17 @@ static void kmalloc_oob_memset_8(struct kunit *test)
{
char *ptr;
size_t size = 128 - KASAN_GRANULE_SIZE;
+ size_t memset_size = 8;
KASAN_TEST_NEEDS_CHECKED_MEMINTRINSICS(test);
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ OPTIMIZER_HIDE_VAR(ptr);
OPTIMIZER_HIDE_VAR(size);
- KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 7, 0, 8));
+ OPTIMIZER_HIDE_VAR(memset_size);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 7, 0, memset_size));
kfree(ptr);
}
@@ -537,14 +547,17 @@ static void kmalloc_oob_memset_16(struct kunit *test)
{
char *ptr;
size_t size = 128 - KASAN_GRANULE_SIZE;
+ size_t memset_size = 16;
KASAN_TEST_NEEDS_CHECKED_MEMINTRINSICS(test);
ptr = kmalloc(size, GFP_KERNEL);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ptr);
+ OPTIMIZER_HIDE_VAR(ptr);
OPTIMIZER_HIDE_VAR(size);
- KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 15, 0, 16));
+ OPTIMIZER_HIDE_VAR(memset_size);
+ KUNIT_EXPECT_KASAN_FAIL(test, memset(ptr + size - 15, 0, memset_size));
kfree(ptr);
}
@@ -1097,11 +1110,9 @@ static void kasan_bitops_test_and_modify(struct kunit *test, int nr, void *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
+ if (nr < 7)
+ KUNIT_EXPECT_KASAN_FAIL(test, kasan_int_result =
+ xor_unlock_is_negative_byte(1 << nr, addr));
}
static void kasan_bitops_generic(struct kunit *test)
diff --git a/mm/kasan/kasan_test_module.c b/mm/kasan/kasan_test_module.c
index 7be7bed456..8b7b3ea2c7 100644
--- a/mm/kasan/kasan_test_module.c
+++ b/mm/kasan/kasan_test_module.c
@@ -5,7 +5,7 @@
* Author: Andrey Ryabinin <a.ryabinin@samsung.com>
*/
-#define pr_fmt(fmt) "kasan test: %s " fmt, __func__
+#define pr_fmt(fmt) "kasan: test: " fmt
#include <linux/mman.h>
#include <linux/module.h>
diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
index 152dca73f3..ca45291567 100644
--- a/mm/kasan/quarantine.c
+++ b/mm/kasan/quarantine.c
@@ -8,6 +8,8 @@
* Based on code by Dmitry Chernenkov.
*/
+#define pr_fmt(fmt) "kasan: " fmt
+
#include <linux/gfp.h>
#include <linux/hash.h>
#include <linux/kernel.h>
@@ -414,7 +416,7 @@ static int __init kasan_cpu_quarantine_init(void)
ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "mm/kasan:online",
kasan_cpu_online, kasan_cpu_offline);
if (ret < 0)
- pr_err("kasan cpu quarantine register failed [%d]\n", ret);
+ pr_err("cpu quarantine register failed [%d]\n", ret);
return ret;
}
late_initcall(kasan_cpu_quarantine_init);
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 6e3cb118d2..e77facb629 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -538,7 +538,7 @@ void kasan_report_invalid_free(void *ptr, unsigned long ip, enum kasan_report_ty
start_report(&flags, true);
- memset(&info, 0, sizeof(info));
+ __memset(&info, 0, sizeof(info));
info.type = type;
info.access_addr = ptr;
info.access_size = 0;
@@ -576,7 +576,7 @@ bool kasan_report(const void *addr, size_t size, bool is_write,
start_report(&irq_flags, true);
- memset(&info, 0, sizeof(info));
+ __memset(&info, 0, sizeof(info));
info.type = KASAN_REPORT_ACCESS;
info.access_addr = addr;
info.access_size = size;
diff --git a/mm/kasan/report_generic.c b/mm/kasan/report_generic.c
index 51a1e8a887..99cbcd73cf 100644
--- a/mm/kasan/report_generic.c
+++ b/mm/kasan/report_generic.c
@@ -220,7 +220,7 @@ static bool __must_check tokenize_frame_descr(const char **frame_descr,
const size_t tok_len = sep - *frame_descr;
if (tok_len + 1 > max_tok_len) {
- pr_err("KASAN internal error: frame description too long: %s\n",
+ pr_err("internal error: frame description too long: %s\n",
*frame_descr);
return false;
}
@@ -233,7 +233,7 @@ static bool __must_check tokenize_frame_descr(const char **frame_descr,
*frame_descr = sep + 1;
if (value != NULL && kstrtoul(token, 10, value)) {
- pr_err("KASAN internal error: not a valid number: %s\n", token);
+ pr_err("internal error: not a valid number: %s\n", token);
return false;
}
@@ -323,7 +323,7 @@ static bool __must_check get_address_stack_frame_info(const void *addr,
frame = (const unsigned long *)(mem_ptr + KASAN_GRANULE_SIZE);
if (frame[0] != KASAN_CURRENT_STACK_FRAME_MAGIC) {
- pr_err("KASAN internal error: frame info validation failed; invalid marker: %lu\n",
+ pr_err("internal error: frame has invalid marker: %lu\n",
frame[0]);
return false;
}
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index dd772f9d0f..d687f09a7a 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -324,7 +324,7 @@ static int kasan_populate_vmalloc_pte(pte_t *ptep, unsigned long addr,
if (!page)
return -ENOMEM;
- memset((void *)page, KASAN_VMALLOC_INVALID, PAGE_SIZE);
+ __memset((void *)page, KASAN_VMALLOC_INVALID, PAGE_SIZE);
pte = pfn_pte(PFN_DOWN(__pa(page)), PAGE_KERNEL);
spin_lock(&init_mm.page_table_lock);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 04:40:22 +0000