mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 13:56:40 +07:00
3175060092
test_ubsan_misaligned_access() is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: lib/test_ubsan.c:91:6: warning: symbol 'test_ubsan_misaligned_access' was not declared. Should it be static? Link: http://lkml.kernel.org/r/20180313103048.28513-1-colin.king@canonical.com Signed-off-by: Colin Ian King <colin.king@canonical.com> Cc: Jinbum Park <jinb.park7@gmail.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
2.5 KiB
C
145 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
|
|
typedef void(*test_ubsan_fp)(void);
|
|
|
|
static void test_ubsan_add_overflow(void)
|
|
{
|
|
volatile int val = INT_MAX;
|
|
|
|
val += 2;
|
|
}
|
|
|
|
static void test_ubsan_sub_overflow(void)
|
|
{
|
|
volatile int val = INT_MIN;
|
|
volatile int val2 = 2;
|
|
|
|
val -= val2;
|
|
}
|
|
|
|
static void test_ubsan_mul_overflow(void)
|
|
{
|
|
volatile int val = INT_MAX / 2;
|
|
|
|
val *= 3;
|
|
}
|
|
|
|
static void test_ubsan_negate_overflow(void)
|
|
{
|
|
volatile int val = INT_MIN;
|
|
|
|
val = -val;
|
|
}
|
|
|
|
static void test_ubsan_divrem_overflow(void)
|
|
{
|
|
volatile int val = 16;
|
|
volatile int val2 = 0;
|
|
|
|
val /= val2;
|
|
}
|
|
|
|
static void test_ubsan_vla_bound_not_positive(void)
|
|
{
|
|
volatile int size = -1;
|
|
char buf[size];
|
|
|
|
(void)buf;
|
|
}
|
|
|
|
static void test_ubsan_shift_out_of_bounds(void)
|
|
{
|
|
volatile int val = -1;
|
|
int val2 = 10;
|
|
|
|
val2 <<= val;
|
|
}
|
|
|
|
static void test_ubsan_out_of_bounds(void)
|
|
{
|
|
volatile int i = 4, j = 5;
|
|
volatile int arr[i];
|
|
|
|
arr[j] = i;
|
|
}
|
|
|
|
static void test_ubsan_load_invalid_value(void)
|
|
{
|
|
volatile char *dst, *src;
|
|
bool val, val2, *ptr;
|
|
char c = 4;
|
|
|
|
dst = (char *)&val;
|
|
src = &c;
|
|
*dst = *src;
|
|
|
|
ptr = &val2;
|
|
val2 = val;
|
|
}
|
|
|
|
static void test_ubsan_null_ptr_deref(void)
|
|
{
|
|
volatile int *ptr = NULL;
|
|
int val;
|
|
|
|
val = *ptr;
|
|
}
|
|
|
|
static void test_ubsan_misaligned_access(void)
|
|
{
|
|
volatile char arr[5] __aligned(4) = {1, 2, 3, 4, 5};
|
|
volatile int *ptr, val = 6;
|
|
|
|
ptr = (int *)(arr + 1);
|
|
*ptr = val;
|
|
}
|
|
|
|
static void test_ubsan_object_size_mismatch(void)
|
|
{
|
|
/* "((aligned(8)))" helps this not into be misaligned for ptr-access. */
|
|
volatile int val __aligned(8) = 4;
|
|
volatile long long *ptr, val2;
|
|
|
|
ptr = (long long *)&val;
|
|
val2 = *ptr;
|
|
}
|
|
|
|
static const test_ubsan_fp test_ubsan_array[] = {
|
|
test_ubsan_add_overflow,
|
|
test_ubsan_sub_overflow,
|
|
test_ubsan_mul_overflow,
|
|
test_ubsan_negate_overflow,
|
|
test_ubsan_divrem_overflow,
|
|
test_ubsan_vla_bound_not_positive,
|
|
test_ubsan_shift_out_of_bounds,
|
|
test_ubsan_out_of_bounds,
|
|
test_ubsan_load_invalid_value,
|
|
//test_ubsan_null_ptr_deref, /* exclude it because there is a crash */
|
|
test_ubsan_misaligned_access,
|
|
test_ubsan_object_size_mismatch,
|
|
};
|
|
|
|
static int __init test_ubsan_init(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(test_ubsan_array); i++)
|
|
test_ubsan_array[i]();
|
|
|
|
(void)test_ubsan_null_ptr_deref; /* to avoid unsed-function warning */
|
|
return 0;
|
|
}
|
|
module_init(test_ubsan_init);
|
|
|
|
static void __exit test_ubsan_exit(void)
|
|
{
|
|
/* do nothing */
|
|
}
|
|
module_exit(test_ubsan_exit);
|
|
|
|
MODULE_AUTHOR("Jinbum Park <jinb.park7@gmail.com>");
|
|
MODULE_LICENSE("GPL v2");
|