Kees Cookoverflow: Introduce overflows_type() and castable_to_type()4b21d254 years agoHistory
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// SPDX-License-Identifier: GPL-2.0 OR MIT/* * Test cases for arithmetic overflow checks. See: * "Running tests with kunit_tool" at Documentation/dev-tools/kunit/start.rst *	./tools/testing/kunit/kunit.py run overflow [--raw_output] */#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <kunit/test.h>#include <linux/device.h>#include <linux/kernel.h>#include <linux/mm.h>#include <linux/module.h>#include <linux/overflow.h>#include <linux/slab.h>#include <linux/types.h>#include <linux/vmalloc.h> #define SKIP(cond, reason)		do {			\	if (cond) {						\		kunit_skip(test, reason);			\		return;						\	}							\} while (0) /* * Clang 11 and earlier generate unwanted libcalls for signed output * on unsigned input. */#if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 11# define SKIP_SIGN_MISMATCH(t)	SKIP(t, "Clang 11 unwanted libcalls")#else# define SKIP_SIGN_MISMATCH(t)	do { } while (0)#endif /* * Clang 13 and earlier generate unwanted libcalls for 64-bit tests on * 32-bit hosts. */#if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 13 &&	\    BITS_PER_LONG != 64# define SKIP_64_ON_32(t)	SKIP(t, "Clang 13 unwanted libcalls")#else# define SKIP_64_ON_32(t)	do { } while (0)#endif #define DEFINE_TEST_ARRAY_TYPED(t1, t2, t)			\	static const struct test_ ## t1 ## _ ## t2 ## __ ## t {	\		t1 a;						\		t2 b;						\		t sum, diff, prod;				\		bool s_of, d_of, p_of;				\	} t1 ## _ ## t2 ## __ ## t ## _tests[] #define DEFINE_TEST_ARRAY(t)	DEFINE_TEST_ARRAY_TYPED(t, t, t) DEFINE_TEST_ARRAY(u8) = {	{0, 0, 0, 0, 0, false, false, false},	{1, 1, 2, 0, 1, false, false, false},	{0, 1, 1, U8_MAX, 0, false, true, false},	{1, 0, 1, 1, 0, false, false, false},	{0, U8_MAX, U8_MAX, 1, 0, false, true, false},	{U8_MAX, 0, U8_MAX, U8_MAX, 0, false, false, false},	{1, U8_MAX, 0, 2, U8_MAX, true, true, false},	{U8_MAX, 1, 0, U8_MAX-1, U8_MAX, true, false, false},	{U8_MAX, U8_MAX, U8_MAX-1, 0, 1, true, false, true}, 	{U8_MAX, U8_MAX-1, U8_MAX-2, 1, 2, true, false, true},	{U8_MAX-1, U8_MAX, U8_MAX-2, U8_MAX, 2, true, true, true}, 	{1U << 3, 1U << 3, 1U << 4, 0, 1U << 6, false, false, false},	{1U << 4, 1U << 4, 1U << 5, 0, 0, false, false, true},	{1U << 4, 1U << 3, 3*(1U << 3), 1U << 3, 1U << 7, false, false, false},	{1U << 7, 1U << 7, 0, 0, 0, true, false, true}, 	{48, 32, 80, 16, 0, false, false, true},	{128, 128, 0, 0, 0, true, false, true},	{123, 234, 101, 145, 110, true, true, true},};DEFINE_TEST_ARRAY(u16) = {	{0, 0, 0, 0, 0, false, false, false},	{1, 1, 2, 0, 1, false, false, false},	{0, 1, 1, U16_MAX, 0, false, true, false},	{1, 0, 1, 1, 0, false, false, false},	{0, U16_MAX, U16_MAX, 1, 0, false, true, false},	{U16_MAX, 0, U16_MAX, U16_MAX, 0, false, false, false},	{1, U16_MAX, 0, 2, U16_MAX, true, true, false},	{U16_MAX, 1, 0, U16_MAX-1, U16_MAX, true, false, false},	{U16_MAX, U16_MAX, U16_MAX-1, 0, 1, true, false, true}, 	{U16_MAX, U16_MAX-1, U16_MAX-2, 1, 2, true, false, true},	{U16_MAX-1, U16_MAX, U16_MAX-2, U16_MAX, 2, true, true, true}, 	{1U << 7, 1U << 7, 1U << 8, 0, 1U << 14, false, false, false},	{1U << 8, 1U << 8, 1U << 9, 0, 0, false, false, true},	{1U << 8, 1U << 7, 3*(1U << 7), 1U << 7, 1U << 15, false, false, false},	{1U << 15, 1U << 15, 0, 0, 0, true, false, true}, 	{123, 234, 357, 65425, 28782, false, true, false},	{1234, 2345, 3579, 64425, 10146, false, true, true},};DEFINE_TEST_ARRAY(u32) = {	{0, 0, 0, 0, 0, false, false, false},	{1, 1, 2, 0, 1, false, false, false},	{0, 1, 1, U32_MAX, 0, false, true, false},	{1, 0, 1, 1, 0, false, false, false},	{0, U32_MAX, U32_MAX, 1, 0, false, true, false},	{U32_MAX, 0, U32_MAX, U32_MAX, 0, false, false, false},	{1, U32_MAX, 0, 2, U32_MAX, true, true, false},	{U32_MAX, 1, 0, U32_MAX-1, U32_MAX, true, false, false},	{U32_MAX, U32_MAX, U32_MAX-1, 0, 1, true, false, true}, 	{U32_MAX, U32_MAX-1, U32_MAX-2, 1, 2, true, false, true},	{U32_MAX-1, U32_MAX, U32_MAX-2, U32_MAX, 2, true, true, true}, 	{1U << 15, 1U << 15, 1U << 16, 0, 1U << 30, false, false, false},	{1U << 16, 1U << 16, 1U << 17, 0, 0, false, false, true},	{1U << 16, 1U << 15, 3*(1U << 15), 1U << 15, 1U << 31, false, false, false},	{1U << 31, 1U << 31, 0, 0, 0, true, false, true}, 	{-2U, 1U, -1U, -3U, -2U, false, false, false},	{-4U, 5U, 1U, -9U, -20U, true, false, true},}; DEFINE_TEST_ARRAY(u64) = {	{0, 0, 0, 0, 0, false, false, false},	{1, 1, 2, 0, 1, false, false, false},	{0, 1, 1, U64_MAX, 0, false, true, false},	{1, 0, 1, 1, 0, false, false, false},	{0, U64_MAX, U64_MAX, 1, 0, false, true, false},	{U64_MAX, 0, U64_MAX, U64_MAX, 0, false, false, false},	{1, U64_MAX, 0, 2, U64_MAX, true, true, false},	{U64_MAX, 1, 0, U64_MAX-1, U64_MAX, true, false, false},	{U64_MAX, U64_MAX, U64_MAX-1, 0, 1, true, false, true}, 	{U64_MAX, U64_MAX-1, U64_MAX-2, 1, 2, true, false, true},	{U64_MAX-1, U64_MAX, U64_MAX-2, U64_MAX, 2, true, true, true}, 	{1ULL << 31, 1ULL << 31, 1ULL << 32, 0, 1ULL << 62, false, false, false},	{1ULL << 32, 1ULL << 32, 1ULL << 33, 0, 0, false, false, true},	{1ULL << 32, 1ULL << 31, 3*(1ULL << 31), 1ULL << 31, 1ULL << 63, false, false, false},	{1ULL << 63, 1ULL << 63, 0, 0, 0, true, false, true},	{1000000000ULL /* 10^9 */, 10000000000ULL /* 10^10 */,	 11000000000ULL, 18446744064709551616ULL, 10000000000000000000ULL,	 false, true, false},	{-15ULL, 10ULL, -5ULL, -25ULL, -150ULL, false, false, true},}; DEFINE_TEST_ARRAY(s8) = {	{0, 0, 0, 0, 0, false, false, false}, 	{0, S8_MAX, S8_MAX, -S8_MAX, 0, false, false, false},	{S8_MAX, 0, S8_MAX, S8_MAX, 0, false, false, false},	{0, S8_MIN, S8_MIN, S8_MIN, 0, false, true, false},	{S8_MIN, 0, S8_MIN, S8_MIN, 0, false, false, false}, 	{-1, S8_MIN, S8_MAX, S8_MAX, S8_MIN, true, false, true},	{S8_MIN, -1, S8_MAX, -S8_MAX, S8_MIN, true, false, true},	{-1, S8_MAX, S8_MAX-1, S8_MIN, -S8_MAX, false, false, false},	{S8_MAX, -1, S8_MAX-1, S8_MIN, -S8_MAX, false, true, false},	{-1, -S8_MAX, S8_MIN, S8_MAX-1, S8_MAX, false, false, false},	{-S8_MAX, -1, S8_MIN, S8_MIN+2, S8_MAX, false, false, false}, 	{1, S8_MIN, -S8_MAX, -S8_MAX, S8_MIN, false, true, false},	{S8_MIN, 1, -S8_MAX, S8_MAX, S8_MIN, false, true, false},	{1, S8_MAX, S8_MIN, S8_MIN+2, S8_MAX, true, false, false},	{S8_MAX, 1, S8_MIN, S8_MAX-1, S8_MAX, true, false, false}, 	{S8_MIN, S8_MIN, 0, 0, 0, true, false, true},	{S8_MAX, S8_MAX, -2, 0, 1, true, false, true}, 	{-4, -32, -36, 28, -128, false, false, true},	{-4, 32, 28, -36, -128, false, false, false},}; DEFINE_TEST_ARRAY(s16) = {	{0, 0, 0, 0, 0, false, false, false}, 	{0, S16_MAX, S16_MAX, -S16_MAX, 0, false, false, false},	{S16_MAX, 0, S16_MAX, S16_MAX, 0, false, false, false},	{0, S16_MIN, S16_MIN, S16_MIN, 0, false, true, false},	{S16_MIN, 0, S16_MIN, S16_MIN, 0, false, false, false}, 	{-1, S16_MIN, S16_MAX, S16_MAX, S16_MIN, true, false, true},	{S16_MIN, -1, S16_MAX, -S16_MAX, S16_MIN, true, false, true},	{-1, S16_MAX, S16_MAX-1, S16_MIN, -S16_MAX, false, false, false},	{S16_MAX, -1, S16_MAX-1, S16_MIN, -S16_MAX, false, true, false},	{-1, -S16_MAX, S16_MIN, S16_MAX-1, S16_MAX, false, false, false},	{-S16_MAX, -1, S16_MIN, S16_MIN+2, S16_MAX, false, false, false}, 	{1, S16_MIN, -S16_MAX, -S16_MAX, S16_MIN, false, true, false},	{S16_MIN, 1, -S16_MAX, S16_MAX, S16_MIN, false, true, false},	{1, S16_MAX, S16_MIN, S16_MIN+2, S16_MAX, true, false, false},	{S16_MAX, 1, S16_MIN, S16_MAX-1, S16_MAX, true, false, false}, 	{S16_MIN, S16_MIN, 0, 0, 0, true, false, true},	{S16_MAX, S16_MAX, -2, 0, 1, true, false, true},};DEFINE_TEST_ARRAY(s32) = {	{0, 0, 0, 0, 0, false, false, false}, 	{0, S32_MAX, S32_MAX, -S32_MAX, 0, false, false, false},	{S32_MAX, 0, S32_MAX, S32_MAX, 0, false, false, false},	{0, S32_MIN, S32_MIN, S32_MIN, 0, false, true, false},	{S32_MIN, 0, S32_MIN, S32_MIN, 0, false, false, false}, 	{-1, S32_MIN, S32_MAX, S32_MAX, S32_MIN, true, false, true},	{S32_MIN, -1, S32_MAX, -S32_MAX, S32_MIN, true, false, true},	{-1, S32_MAX, S32_MAX-1, S32_MIN, -S32_MAX, false, false, false},	{S32_MAX, -1, S32_MAX-1, S32_MIN, -S32_MAX, false, true, false},	{-1, -S32_MAX, S32_MIN, S32_MAX-1, S32_MAX, false, false, false},	{-S32_MAX, -1, S32_MIN, S32_MIN+2, S32_MAX, false, false, false}, 	{1, S32_MIN, -S32_MAX, -S32_MAX, S32_MIN, false, true, false},	{S32_MIN, 1, -S32_MAX, S32_MAX, S32_MIN, false, true, false},	{1, S32_MAX, S32_MIN, S32_MIN+2, S32_MAX, true, false, false},	{S32_MAX, 1, S32_MIN, S32_MAX-1, S32_MAX, true, false, false}, 	{S32_MIN, S32_MIN, 0, 0, 0, true, false, true},	{S32_MAX, S32_MAX, -2, 0, 1, true, false, true},}; DEFINE_TEST_ARRAY(s64) = {	{0, 0, 0, 0, 0, false, false, false}, 	{0, S64_MAX, S64_MAX, -S64_MAX, 0, false, false, false},	{S64_MAX, 0, S64_MAX, S64_MAX, 0, false, false, false},	{0, S64_MIN, S64_MIN, S64_MIN, 0, false, true, false},	{S64_MIN, 0, S64_MIN, S64_MIN, 0, false, false, false}, 	{-1, S64_MIN, S64_MAX, S64_MAX, S64_MIN, true, false, true},	{S64_MIN, -1, S64_MAX, -S64_MAX, S64_MIN, true, false, true},	{-1, S64_MAX, S64_MAX-1, S64_MIN, -S64_MAX, false, false, false},	{S64_MAX, -1, S64_MAX-1, S64_MIN, -S64_MAX, false, true, false},	{-1, -S64_MAX, S64_MIN, S64_MAX-1, S64_MAX, false, false, false},	{-S64_MAX, -1, S64_MIN, S64_MIN+2, S64_MAX, false, false, false}, 	{1, S64_MIN, -S64_MAX, -S64_MAX, S64_MIN, false, true, false},	{S64_MIN, 1, -S64_MAX, S64_MAX, S64_MIN, false, true, false},	{1, S64_MAX, S64_MIN, S64_MIN+2, S64_MAX, true, false, false},	{S64_MAX, 1, S64_MIN, S64_MAX-1, S64_MAX, true, false, false}, 	{S64_MIN, S64_MIN, 0, 0, 0, true, false, true},	{S64_MAX, S64_MAX, -2, 0, 1, true, false, true}, 	{-1, -1, -2, 0, 1, false, false, false},	{-1, -128, -129, 127, 128, false, false, false},	{-128, -1, -129, -127, 128, false, false, false},	{0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false},}; #define check_one_op(t, fmt, op, sym, a, b, r, of) do {			\	int _a_orig = a, _a_bump = a + 1;				\	int _b_orig = b, _b_bump = b + 1;				\	bool _of;							\	t _r;								\									\	_of = check_ ## op ## _overflow(a, b, &_r);			\	KUNIT_EXPECT_EQ_MSG(test, _of, of,				\		"expected "fmt" "sym" "fmt" to%s overflow (type %s)\n",	\		a, b, of ? "" : " not", #t);				\	KUNIT_EXPECT_EQ_MSG(test, _r, r,				\		"expected "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \		a, b, r, _r, #t);					\	/* Check for internal macro side-effects. */			\	_of = check_ ## op ## _overflow(_a_orig++, _b_orig++, &_r);	\	KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, "Unexpected " #op " macro side-effect!\n"); \	KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, "Unexpected " #op " macro side-effect!\n"); \} while (0) #define DEFINE_TEST_FUNC_TYPED(n, t, fmt)				\static void do_test_ ## n(struct kunit *test, const struct test_ ## n *p) \{									\	check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of);	\	check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of);	\	check_one_op(t, fmt, sub, "-", p->a, p->b, p->diff, p->d_of);	\	check_one_op(t, fmt, mul, "*", p->a, p->b, p->prod, p->p_of);	\	check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of);	\}									\									\static void n ## _overflow_test(struct kunit *test) {			\	unsigned i;							\									\	SKIP_64_ON_32(__same_type(t, u64));				\	SKIP_64_ON_32(__same_type(t, s64));				\	SKIP_SIGN_MISMATCH(__same_type(n ## _tests[0].a, u32) &&	\			   __same_type(n ## _tests[0].b, u32) &&	\			   __same_type(n ## _tests[0].sum, int));	\									\	for (i = 0; i < ARRAY_SIZE(n ## _tests); ++i)			\		do_test_ ## n(test, &n ## _tests[i]);			\	kunit_info(test, "%zu %s arithmetic tests finished\n",		\		ARRAY_SIZE(n ## _tests), #n);				\} #define DEFINE_TEST_FUNC(t, fmt)					\	DEFINE_TEST_FUNC_TYPED(t ## _ ## t ## __ ## t, t, fmt) DEFINE_TEST_FUNC(u8, "%d");DEFINE_TEST_FUNC(s8, "%d");DEFINE_TEST_FUNC(u16, "%d");DEFINE_TEST_FUNC(s16, "%d");DEFINE_TEST_FUNC(u32, "%u");DEFINE_TEST_FUNC(s32, "%d");DEFINE_TEST_FUNC(u64, "%llu");DEFINE_TEST_FUNC(s64, "%lld"); DEFINE_TEST_ARRAY_TYPED(u32, u32, u8) = {	{0, 0, 0, 0, 0, false, false, false},	{U8_MAX, 2, 1, U8_MAX - 2, U8_MAX - 1, true, false, true},	{U8_MAX + 1, 0, 0, 0, 0, true, true, false},};DEFINE_TEST_FUNC_TYPED(u32_u32__u8, u8, "%d"); DEFINE_TEST_ARRAY_TYPED(u32, u32, int) = {	{0, 0, 0, 0, 0, false, false, false},	{U32_MAX, 0, -1, -1, 0, true, true, false},};DEFINE_TEST_FUNC_TYPED(u32_u32__int, int, "%d"); DEFINE_TEST_ARRAY_TYPED(u8, u8, int) = {	{0, 0, 0, 0, 0, false, false, false},	{U8_MAX, U8_MAX, 2 * U8_MAX, 0, U8_MAX * U8_MAX, false, false, false},	{1, 2, 3, -1, 2, false, false, false},};DEFINE_TEST_FUNC_TYPED(u8_u8__int, int, "%d"); DEFINE_TEST_ARRAY_TYPED(int, int, u8) = {	{0, 0, 0, 0, 0, false, false, false},	{1, 2, 3, U8_MAX, 2, false, true, false},	{-1, 0, U8_MAX, U8_MAX, 0, true, true, false},};DEFINE_TEST_FUNC_TYPED(int_int__u8, u8, "%d"); /* Args are: value, shift, type, expected result, overflow expected */#define TEST_ONE_SHIFT(a, s, t, expect, of)	do {			\	typeof(a) __a = (a);						\	typeof(s) __s = (s);						\	t __e = (expect);						\	t __d;								\	bool __of = check_shl_overflow(__a, __s, &__d);			\	if (__of != of) {						\		KUNIT_EXPECT_EQ_MSG(test, __of, of,			\			"expected (%s)(%s << %s) to%s overflow\n",	\			#t, #a, #s, of ? "" : " not");			\	} else if (!__of && __d != __e) {				\		KUNIT_EXPECT_EQ_MSG(test, __d, __e,			\			"expected (%s)(%s << %s) == %s\n",		\			#t, #a, #s, #expect);				\		if ((t)-1 < 0)						\			kunit_info(test, "got %lld\n", (s64)__d);	\		else							\			kunit_info(test, "got %llu\n", (u64)__d);	\	}								\	count++;							\} while (0) static void shift_sane_test(struct kunit *test){	int count = 0; 	/* Sane shifts. */	TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false);	TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false);	TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false);	TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false);	TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false);	TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false);	TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false);	TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false);	TEST_ONE_SHIFT(1, 0, int, 1 << 0, false);	TEST_ONE_SHIFT(1, 16, int, 1 << 16, false);	TEST_ONE_SHIFT(1, 30, int, 1 << 30, false);	TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false);	TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false);	TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false);	TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false);	TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false);	TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false);	TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false);	TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false);	TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false);	TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false);	TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false);	TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false);	TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false);	TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false);	TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64, 0xFFFFFFFFULL << 32, false); 	/* Sane shift: start and end with 0, without a too-wide shift. */	TEST_ONE_SHIFT(0, 7, u8, 0, false);	TEST_ONE_SHIFT(0, 15, u16, 0, false);	TEST_ONE_SHIFT(0, 31, unsigned int, 0, false);	TEST_ONE_SHIFT(0, 31, u32, 0, false);	TEST_ONE_SHIFT(0, 63, u64, 0, false); 	/* Sane shift: start and end with 0, without reaching signed bit. */	TEST_ONE_SHIFT(0, 6, s8, 0, false);	TEST_ONE_SHIFT(0, 14, s16, 0, false);	TEST_ONE_SHIFT(0, 30, int, 0, false);	TEST_ONE_SHIFT(0, 30, s32, 0, false);	TEST_ONE_SHIFT(0, 62, s64, 0, false); 	kunit_info(test, "%d sane shift tests finished\n", count);} static void shift_overflow_test(struct kunit *test){	int count = 0; 	/* Overflow: shifted the bit off the end. */	TEST_ONE_SHIFT(1, 8, u8, 0, true);	TEST_ONE_SHIFT(1, 16, u16, 0, true);	TEST_ONE_SHIFT(1, 32, unsigned int, 0, true);	TEST_ONE_SHIFT(1, 32, u32, 0, true);	TEST_ONE_SHIFT(1, 64, u64, 0, true); 	/* Overflow: shifted into the signed bit. */	TEST_ONE_SHIFT(1, 7, s8, 0, true);	TEST_ONE_SHIFT(1, 15, s16, 0, true);	TEST_ONE_SHIFT(1, 31, int, 0, true);	TEST_ONE_SHIFT(1, 31, s32, 0, true);	TEST_ONE_SHIFT(1, 63, s64, 0, true); 	/* Overflow: high bit falls off unsigned types. */	/* 10010110 */	TEST_ONE_SHIFT(150, 1, u8, 0, true);	/* 1000100010010110 */	TEST_ONE_SHIFT(34966, 1, u16, 0, true);	/* 10000100000010001000100010010110 */	TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true);	TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true);	/* 1000001000010000010000000100000010000100000010001000100010010110 */	TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true); 	/* Overflow: bit shifted into signed bit on signed types. */	/* 01001011 */	TEST_ONE_SHIFT(75, 1, s8, 0, true);	/* 0100010001001011 */	TEST_ONE_SHIFT(17483, 1, s16, 0, true);	/* 01000010000001000100010001001011 */	TEST_ONE_SHIFT(1107575883, 1, s32, 0, true);	TEST_ONE_SHIFT(1107575883, 1, int, 0, true);	/* 0100000100001000001000000010000001000010000001000100010001001011 */	TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true); 	/* Overflow: bit shifted past signed bit on signed types. */	/* 01001011 */	TEST_ONE_SHIFT(75, 2, s8, 0, true);	/* 0100010001001011 */	TEST_ONE_SHIFT(17483, 2, s16, 0, true);	/* 01000010000001000100010001001011 */	TEST_ONE_SHIFT(1107575883, 2, s32, 0, true);	TEST_ONE_SHIFT(1107575883, 2, int, 0, true);	/* 0100000100001000001000000010000001000010000001000100010001001011 */	TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true); 	kunit_info(test, "%d overflow shift tests finished\n", count);} static void shift_truncate_test(struct kunit *test){	int count = 0; 	/* Overflow: values larger than destination type. */	TEST_ONE_SHIFT(0x100, 0, u8, 0, true);	TEST_ONE_SHIFT(0xFF, 0, s8, 0, true);	TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true);	TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true);	TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true);	TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true);	TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true);	TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true);	TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true); 	/* Overflow: shifted at or beyond entire type's bit width. */	TEST_ONE_SHIFT(0, 8, u8, 0, true);	TEST_ONE_SHIFT(0, 9, u8, 0, true);	TEST_ONE_SHIFT(0, 8, s8, 0, true);	TEST_ONE_SHIFT(0, 9, s8, 0, true);	TEST_ONE_SHIFT(0, 16, u16, 0, true);	TEST_ONE_SHIFT(0, 17, u16, 0, true);	TEST_ONE_SHIFT(0, 16, s16, 0, true);	TEST_ONE_SHIFT(0, 17, s16, 0, true);	TEST_ONE_SHIFT(0, 32, u32, 0, true);	TEST_ONE_SHIFT(0, 33, u32, 0, true);	TEST_ONE_SHIFT(0, 32, int, 0, true);	TEST_ONE_SHIFT(0, 33, int, 0, true);	TEST_ONE_SHIFT(0, 32, s32, 0, true);	TEST_ONE_SHIFT(0, 33, s32, 0, true);	TEST_ONE_SHIFT(0, 64, u64, 0, true);	TEST_ONE_SHIFT(0, 65, u64, 0, true);	TEST_ONE_SHIFT(0, 64, s64, 0, true);	TEST_ONE_SHIFT(0, 65, s64, 0, true); 	kunit_info(test, "%d truncate shift tests finished\n", count);} static void shift_nonsense_test(struct kunit *test){

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