1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/init.h>
3 #include <linux/kernel.h>
4 #include <linux/module.h>
6 typedef void(*test_ubsan_fp)(void);
8 static void test_ubsan_add_overflow(void)
10 volatile int val = INT_MAX;
15 static void test_ubsan_sub_overflow(void)
17 volatile int val = INT_MIN;
18 volatile int val2 = 2;
23 static void test_ubsan_mul_overflow(void)
25 volatile int val = INT_MAX / 2;
30 static void test_ubsan_negate_overflow(void)
32 volatile int val = INT_MIN;
37 static void test_ubsan_divrem_overflow(void)
39 volatile int val = 16;
40 volatile int val2 = 0;
45 static void test_ubsan_shift_out_of_bounds(void)
47 volatile int val = -1;
53 static void test_ubsan_out_of_bounds(void)
55 volatile int i = 4, j = 5;
61 static void test_ubsan_load_invalid_value(void)
63 volatile char *dst, *src;
75 static void test_ubsan_null_ptr_deref(void)
77 volatile int *ptr = NULL;
83 static void test_ubsan_misaligned_access(void)
85 volatile char arr[5] __aligned(4) = {1, 2, 3, 4, 5};
86 volatile int *ptr, val = 6;
88 ptr = (int *)(arr + 1);
92 static const test_ubsan_fp test_ubsan_array[] = {
93 test_ubsan_add_overflow,
94 test_ubsan_sub_overflow,
95 test_ubsan_mul_overflow,
96 test_ubsan_negate_overflow,
97 test_ubsan_divrem_overflow,
98 test_ubsan_shift_out_of_bounds,
99 test_ubsan_out_of_bounds,
100 test_ubsan_load_invalid_value,
101 //test_ubsan_null_ptr_deref, /* exclude it because there is a crash */
102 test_ubsan_misaligned_access,
105 static int __init test_ubsan_init(void)
109 for (i = 0; i < ARRAY_SIZE(test_ubsan_array); i++)
110 test_ubsan_array[i]();
112 (void)test_ubsan_null_ptr_deref; /* to avoid unsed-function warning */
115 module_init(test_ubsan_init);
117 static void __exit test_ubsan_exit(void)
121 module_exit(test_ubsan_exit);
123 MODULE_AUTHOR("Jinbum Park <jinb.park7@gmail.com>");
124 MODULE_LICENSE("GPL v2");