136 lines
2.4 KiB
C
136 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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typedef void(*test_ubsan_fp)(void);
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static void test_ubsan_add_overflow(void)
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{
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volatile int val = INT_MAX;
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val += 2;
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}
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static void test_ubsan_sub_overflow(void)
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{
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volatile int val = INT_MIN;
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volatile int val2 = 2;
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val -= val2;
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}
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static void test_ubsan_mul_overflow(void)
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{
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volatile int val = INT_MAX / 2;
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val *= 3;
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}
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static void test_ubsan_negate_overflow(void)
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{
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volatile int val = INT_MIN;
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val = -val;
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}
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static void test_ubsan_divrem_overflow(void)
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{
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volatile int val = 16;
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volatile int val2 = 0;
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val /= val2;
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}
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static void test_ubsan_shift_out_of_bounds(void)
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{
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volatile int val = -1;
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int val2 = 10;
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val2 <<= val;
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}
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static void test_ubsan_out_of_bounds(void)
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{
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volatile int i = 4, j = 5;
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volatile int arr[4];
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arr[j] = i;
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}
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static void test_ubsan_load_invalid_value(void)
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{
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volatile char *dst, *src;
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bool val, val2, *ptr;
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char c = 4;
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dst = (char *)&val;
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src = &c;
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*dst = *src;
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ptr = &val2;
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val2 = val;
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}
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static void test_ubsan_null_ptr_deref(void)
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{
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volatile int *ptr = NULL;
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int val;
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val = *ptr;
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}
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static void test_ubsan_misaligned_access(void)
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{
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volatile char arr[5] __aligned(4) = {1, 2, 3, 4, 5};
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volatile int *ptr, val = 6;
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ptr = (int *)(arr + 1);
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*ptr = val;
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}
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static void test_ubsan_object_size_mismatch(void)
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{
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/* "((aligned(8)))" helps this not into be misaligned for ptr-access. */
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volatile int val __aligned(8) = 4;
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volatile long long *ptr, val2;
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ptr = (long long *)&val;
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val2 = *ptr;
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}
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static const test_ubsan_fp test_ubsan_array[] = {
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test_ubsan_add_overflow,
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test_ubsan_sub_overflow,
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test_ubsan_mul_overflow,
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test_ubsan_negate_overflow,
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test_ubsan_divrem_overflow,
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test_ubsan_shift_out_of_bounds,
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test_ubsan_out_of_bounds,
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test_ubsan_load_invalid_value,
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//test_ubsan_null_ptr_deref, /* exclude it because there is a crash */
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test_ubsan_misaligned_access,
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test_ubsan_object_size_mismatch,
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};
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static int __init test_ubsan_init(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(test_ubsan_array); i++)
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test_ubsan_array[i]();
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(void)test_ubsan_null_ptr_deref; /* to avoid unsed-function warning */
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return 0;
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}
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module_init(test_ubsan_init);
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static void __exit test_ubsan_exit(void)
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{
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/* do nothing */
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}
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module_exit(test_ubsan_exit);
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MODULE_AUTHOR("Jinbum Park <jinb.park7@gmail.com>");
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MODULE_LICENSE("GPL v2");
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