1 // SPDX-License-Identifier: GPL-2.0 OR MIT 2 /* 3 * Test cases for arithmetic overflow checks. See: 4 * "Running tests with kunit_tool" at Documentation/dev-tools/kunit/start.rst 5 * ./tools/testing/kunit/kunit.py run overflow [--raw_output] 6 */ 7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 9 #include <kunit/device.h> 10 #include <kunit/test.h> 11 #include <linux/device.h> 12 #include <linux/kernel.h> 13 #include <linux/mm.h> 14 #include <linux/module.h> 15 #include <linux/overflow.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 #include <linux/vmalloc.h> 19 20 #define SKIP(cond, reason) do { \ 21 if (cond) { \ 22 kunit_skip(test, reason); \ 23 return; \ 24 } \ 25 } while (0) 26 27 /* 28 * Clang 11 and earlier generate unwanted libcalls for signed output 29 * on unsigned input. 30 */ 31 #if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 11 32 # define SKIP_SIGN_MISMATCH(t) SKIP(t, "Clang 11 unwanted libcalls") 33 #else 34 # define SKIP_SIGN_MISMATCH(t) do { } while (0) 35 #endif 36 37 /* 38 * Clang 13 and earlier generate unwanted libcalls for 64-bit tests on 39 * 32-bit hosts. 40 */ 41 #if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 13 && \ 42 BITS_PER_LONG != 64 43 # define SKIP_64_ON_32(t) SKIP(t, "Clang 13 unwanted libcalls") 44 #else 45 # define SKIP_64_ON_32(t) do { } while (0) 46 #endif 47 48 #define DEFINE_TEST_ARRAY_TYPED(t1, t2, t) \ 49 static const struct test_ ## t1 ## _ ## t2 ## __ ## t { \ 50 t1 a; \ 51 t2 b; \ 52 t sum, diff, prod; \ 53 bool s_of, d_of, p_of; \ 54 } t1 ## _ ## t2 ## __ ## t ## _tests[] 55 56 #define DEFINE_TEST_ARRAY(t) DEFINE_TEST_ARRAY_TYPED(t, t, t) 57 58 DEFINE_TEST_ARRAY(u8) = { 59 {0, 0, 0, 0, 0, false, false, false}, 60 {1, 1, 2, 0, 1, false, false, false}, 61 {0, 1, 1, U8_MAX, 0, false, true, false}, 62 {1, 0, 1, 1, 0, false, false, false}, 63 {0, U8_MAX, U8_MAX, 1, 0, false, true, false}, 64 {U8_MAX, 0, U8_MAX, U8_MAX, 0, false, false, false}, 65 {1, U8_MAX, 0, 2, U8_MAX, true, true, false}, 66 {U8_MAX, 1, 0, U8_MAX-1, U8_MAX, true, false, false}, 67 {U8_MAX, U8_MAX, U8_MAX-1, 0, 1, true, false, true}, 68 69 {U8_MAX, U8_MAX-1, U8_MAX-2, 1, 2, true, false, true}, 70 {U8_MAX-1, U8_MAX, U8_MAX-2, U8_MAX, 2, true, true, true}, 71 72 {1U << 3, 1U << 3, 1U << 4, 0, 1U << 6, false, false, false}, 73 {1U << 4, 1U << 4, 1U << 5, 0, 0, false, false, true}, 74 {1U << 4, 1U << 3, 3*(1U << 3), 1U << 3, 1U << 7, false, false, false}, 75 {1U << 7, 1U << 7, 0, 0, 0, true, false, true}, 76 77 {48, 32, 80, 16, 0, false, false, true}, 78 {128, 128, 0, 0, 0, true, false, true}, 79 {123, 234, 101, 145, 110, true, true, true}, 80 }; 81 DEFINE_TEST_ARRAY(u16) = { 82 {0, 0, 0, 0, 0, false, false, false}, 83 {1, 1, 2, 0, 1, false, false, false}, 84 {0, 1, 1, U16_MAX, 0, false, true, false}, 85 {1, 0, 1, 1, 0, false, false, false}, 86 {0, U16_MAX, U16_MAX, 1, 0, false, true, false}, 87 {U16_MAX, 0, U16_MAX, U16_MAX, 0, false, false, false}, 88 {1, U16_MAX, 0, 2, U16_MAX, true, true, false}, 89 {U16_MAX, 1, 0, U16_MAX-1, U16_MAX, true, false, false}, 90 {U16_MAX, U16_MAX, U16_MAX-1, 0, 1, true, false, true}, 91 92 {U16_MAX, U16_MAX-1, U16_MAX-2, 1, 2, true, false, true}, 93 {U16_MAX-1, U16_MAX, U16_MAX-2, U16_MAX, 2, true, true, true}, 94 95 {1U << 7, 1U << 7, 1U << 8, 0, 1U << 14, false, false, false}, 96 {1U << 8, 1U << 8, 1U << 9, 0, 0, false, false, true}, 97 {1U << 8, 1U << 7, 3*(1U << 7), 1U << 7, 1U << 15, false, false, false}, 98 {1U << 15, 1U << 15, 0, 0, 0, true, false, true}, 99 100 {123, 234, 357, 65425, 28782, false, true, false}, 101 {1234, 2345, 3579, 64425, 10146, false, true, true}, 102 }; 103 DEFINE_TEST_ARRAY(u32) = { 104 {0, 0, 0, 0, 0, false, false, false}, 105 {1, 1, 2, 0, 1, false, false, false}, 106 {0, 1, 1, U32_MAX, 0, false, true, false}, 107 {1, 0, 1, 1, 0, false, false, false}, 108 {0, U32_MAX, U32_MAX, 1, 0, false, true, false}, 109 {U32_MAX, 0, U32_MAX, U32_MAX, 0, false, false, false}, 110 {1, U32_MAX, 0, 2, U32_MAX, true, true, false}, 111 {U32_MAX, 1, 0, U32_MAX-1, U32_MAX, true, false, false}, 112 {U32_MAX, U32_MAX, U32_MAX-1, 0, 1, true, false, true}, 113 114 {U32_MAX, U32_MAX-1, U32_MAX-2, 1, 2, true, false, true}, 115 {U32_MAX-1, U32_MAX, U32_MAX-2, U32_MAX, 2, true, true, true}, 116 117 {1U << 15, 1U << 15, 1U << 16, 0, 1U << 30, false, false, false}, 118 {1U << 16, 1U << 16, 1U << 17, 0, 0, false, false, true}, 119 {1U << 16, 1U << 15, 3*(1U << 15), 1U << 15, 1U << 31, false, false, false}, 120 {1U << 31, 1U << 31, 0, 0, 0, true, false, true}, 121 122 {-2U, 1U, -1U, -3U, -2U, false, false, false}, 123 {-4U, 5U, 1U, -9U, -20U, true, false, true}, 124 }; 125 126 DEFINE_TEST_ARRAY(u64) = { 127 {0, 0, 0, 0, 0, false, false, false}, 128 {1, 1, 2, 0, 1, false, false, false}, 129 {0, 1, 1, U64_MAX, 0, false, true, false}, 130 {1, 0, 1, 1, 0, false, false, false}, 131 {0, U64_MAX, U64_MAX, 1, 0, false, true, false}, 132 {U64_MAX, 0, U64_MAX, U64_MAX, 0, false, false, false}, 133 {1, U64_MAX, 0, 2, U64_MAX, true, true, false}, 134 {U64_MAX, 1, 0, U64_MAX-1, U64_MAX, true, false, false}, 135 {U64_MAX, U64_MAX, U64_MAX-1, 0, 1, true, false, true}, 136 137 {U64_MAX, U64_MAX-1, U64_MAX-2, 1, 2, true, false, true}, 138 {U64_MAX-1, U64_MAX, U64_MAX-2, U64_MAX, 2, true, true, true}, 139 140 {1ULL << 31, 1ULL << 31, 1ULL << 32, 0, 1ULL << 62, false, false, false}, 141 {1ULL << 32, 1ULL << 32, 1ULL << 33, 0, 0, false, false, true}, 142 {1ULL << 32, 1ULL << 31, 3*(1ULL << 31), 1ULL << 31, 1ULL << 63, false, false, false}, 143 {1ULL << 63, 1ULL << 63, 0, 0, 0, true, false, true}, 144 {1000000000ULL /* 10^9 */, 10000000000ULL /* 10^10 */, 145 11000000000ULL, 18446744064709551616ULL, 10000000000000000000ULL, 146 false, true, false}, 147 {-15ULL, 10ULL, -5ULL, -25ULL, -150ULL, false, false, true}, 148 }; 149 150 DEFINE_TEST_ARRAY(s8) = { 151 {0, 0, 0, 0, 0, false, false, false}, 152 153 {0, S8_MAX, S8_MAX, -S8_MAX, 0, false, false, false}, 154 {S8_MAX, 0, S8_MAX, S8_MAX, 0, false, false, false}, 155 {0, S8_MIN, S8_MIN, S8_MIN, 0, false, true, false}, 156 {S8_MIN, 0, S8_MIN, S8_MIN, 0, false, false, false}, 157 158 {-1, S8_MIN, S8_MAX, S8_MAX, S8_MIN, true, false, true}, 159 {S8_MIN, -1, S8_MAX, -S8_MAX, S8_MIN, true, false, true}, 160 {-1, S8_MAX, S8_MAX-1, S8_MIN, -S8_MAX, false, false, false}, 161 {S8_MAX, -1, S8_MAX-1, S8_MIN, -S8_MAX, false, true, false}, 162 {-1, -S8_MAX, S8_MIN, S8_MAX-1, S8_MAX, false, false, false}, 163 {-S8_MAX, -1, S8_MIN, S8_MIN+2, S8_MAX, false, false, false}, 164 165 {1, S8_MIN, -S8_MAX, -S8_MAX, S8_MIN, false, true, false}, 166 {S8_MIN, 1, -S8_MAX, S8_MAX, S8_MIN, false, true, false}, 167 {1, S8_MAX, S8_MIN, S8_MIN+2, S8_MAX, true, false, false}, 168 {S8_MAX, 1, S8_MIN, S8_MAX-1, S8_MAX, true, false, false}, 169 170 {S8_MIN, S8_MIN, 0, 0, 0, true, false, true}, 171 {S8_MAX, S8_MAX, -2, 0, 1, true, false, true}, 172 173 {-4, -32, -36, 28, -128, false, false, true}, 174 {-4, 32, 28, -36, -128, false, false, false}, 175 }; 176 177 DEFINE_TEST_ARRAY(s16) = { 178 {0, 0, 0, 0, 0, false, false, false}, 179 180 {0, S16_MAX, S16_MAX, -S16_MAX, 0, false, false, false}, 181 {S16_MAX, 0, S16_MAX, S16_MAX, 0, false, false, false}, 182 {0, S16_MIN, S16_MIN, S16_MIN, 0, false, true, false}, 183 {S16_MIN, 0, S16_MIN, S16_MIN, 0, false, false, false}, 184 185 {-1, S16_MIN, S16_MAX, S16_MAX, S16_MIN, true, false, true}, 186 {S16_MIN, -1, S16_MAX, -S16_MAX, S16_MIN, true, false, true}, 187 {-1, S16_MAX, S16_MAX-1, S16_MIN, -S16_MAX, false, false, false}, 188 {S16_MAX, -1, S16_MAX-1, S16_MIN, -S16_MAX, false, true, false}, 189 {-1, -S16_MAX, S16_MIN, S16_MAX-1, S16_MAX, false, false, false}, 190 {-S16_MAX, -1, S16_MIN, S16_MIN+2, S16_MAX, false, false, false}, 191 192 {1, S16_MIN, -S16_MAX, -S16_MAX, S16_MIN, false, true, false}, 193 {S16_MIN, 1, -S16_MAX, S16_MAX, S16_MIN, false, true, false}, 194 {1, S16_MAX, S16_MIN, S16_MIN+2, S16_MAX, true, false, false}, 195 {S16_MAX, 1, S16_MIN, S16_MAX-1, S16_MAX, true, false, false}, 196 197 {S16_MIN, S16_MIN, 0, 0, 0, true, false, true}, 198 {S16_MAX, S16_MAX, -2, 0, 1, true, false, true}, 199 }; 200 DEFINE_TEST_ARRAY(s32) = { 201 {0, 0, 0, 0, 0, false, false, false}, 202 203 {0, S32_MAX, S32_MAX, -S32_MAX, 0, false, false, false}, 204 {S32_MAX, 0, S32_MAX, S32_MAX, 0, false, false, false}, 205 {0, S32_MIN, S32_MIN, S32_MIN, 0, false, true, false}, 206 {S32_MIN, 0, S32_MIN, S32_MIN, 0, false, false, false}, 207 208 {-1, S32_MIN, S32_MAX, S32_MAX, S32_MIN, true, false, true}, 209 {S32_MIN, -1, S32_MAX, -S32_MAX, S32_MIN, true, false, true}, 210 {-1, S32_MAX, S32_MAX-1, S32_MIN, -S32_MAX, false, false, false}, 211 {S32_MAX, -1, S32_MAX-1, S32_MIN, -S32_MAX, false, true, false}, 212 {-1, -S32_MAX, S32_MIN, S32_MAX-1, S32_MAX, false, false, false}, 213 {-S32_MAX, -1, S32_MIN, S32_MIN+2, S32_MAX, false, false, false}, 214 215 {1, S32_MIN, -S32_MAX, -S32_MAX, S32_MIN, false, true, false}, 216 {S32_MIN, 1, -S32_MAX, S32_MAX, S32_MIN, false, true, false}, 217 {1, S32_MAX, S32_MIN, S32_MIN+2, S32_MAX, true, false, false}, 218 {S32_MAX, 1, S32_MIN, S32_MAX-1, S32_MAX, true, false, false}, 219 220 {S32_MIN, S32_MIN, 0, 0, 0, true, false, true}, 221 {S32_MAX, S32_MAX, -2, 0, 1, true, false, true}, 222 }; 223 224 DEFINE_TEST_ARRAY(s64) = { 225 {0, 0, 0, 0, 0, false, false, false}, 226 227 {0, S64_MAX, S64_MAX, -S64_MAX, 0, false, false, false}, 228 {S64_MAX, 0, S64_MAX, S64_MAX, 0, false, false, false}, 229 {0, S64_MIN, S64_MIN, S64_MIN, 0, false, true, false}, 230 {S64_MIN, 0, S64_MIN, S64_MIN, 0, false, false, false}, 231 232 {-1, S64_MIN, S64_MAX, S64_MAX, S64_MIN, true, false, true}, 233 {S64_MIN, -1, S64_MAX, -S64_MAX, S64_MIN, true, false, true}, 234 {-1, S64_MAX, S64_MAX-1, S64_MIN, -S64_MAX, false, false, false}, 235 {S64_MAX, -1, S64_MAX-1, S64_MIN, -S64_MAX, false, true, false}, 236 {-1, -S64_MAX, S64_MIN, S64_MAX-1, S64_MAX, false, false, false}, 237 {-S64_MAX, -1, S64_MIN, S64_MIN+2, S64_MAX, false, false, false}, 238 239 {1, S64_MIN, -S64_MAX, -S64_MAX, S64_MIN, false, true, false}, 240 {S64_MIN, 1, -S64_MAX, S64_MAX, S64_MIN, false, true, false}, 241 {1, S64_MAX, S64_MIN, S64_MIN+2, S64_MAX, true, false, false}, 242 {S64_MAX, 1, S64_MIN, S64_MAX-1, S64_MAX, true, false, false}, 243 244 {S64_MIN, S64_MIN, 0, 0, 0, true, false, true}, 245 {S64_MAX, S64_MAX, -2, 0, 1, true, false, true}, 246 247 {-1, -1, -2, 0, 1, false, false, false}, 248 {-1, -128, -129, 127, 128, false, false, false}, 249 {-128, -1, -129, -127, 128, false, false, false}, 250 {0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false}, 251 }; 252 253 #define check_one_op(t, fmt, op, sym, a, b, r, of) do { \ 254 int _a_orig = a, _a_bump = a + 1; \ 255 int _b_orig = b, _b_bump = b + 1; \ 256 bool _of; \ 257 t _r; \ 258 \ 259 _of = check_ ## op ## _overflow(a, b, &_r); \ 260 KUNIT_EXPECT_EQ_MSG(test, _of, of, \ 261 "expected check "fmt" "sym" "fmt" to%s overflow (type %s)\n", \ 262 a, b, of ? "" : " not", #t); \ 263 KUNIT_EXPECT_EQ_MSG(test, _r, r, \ 264 "expected check "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \ 265 a, b, r, _r, #t); \ 266 /* Check for internal macro side-effects. */ \ 267 _of = check_ ## op ## _overflow(_a_orig++, _b_orig++, &_r); \ 268 KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, \ 269 "Unexpected check " #op " macro side-effect!\n"); \ 270 KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, \ 271 "Unexpected check " #op " macro side-effect!\n"); \ 272 \ 273 _r = wrapping_ ## op(t, a, b); \ 274 KUNIT_EXPECT_TRUE_MSG(test, _r == r, \ 275 "expected wrap "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \ 276 a, b, r, _r, #t); \ 277 /* Check for internal macro side-effects. */ \ 278 _a_orig = a; \ 279 _b_orig = b; \ 280 _r = wrapping_ ## op(t, _a_orig++, _b_orig++); \ 281 KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, \ 282 "Unexpected wrap " #op " macro side-effect!\n"); \ 283 KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, \ 284 "Unexpected wrap " #op " macro side-effect!\n"); \ 285 } while (0) 286 287 static int global_counter; 288 static void bump_counter(void) 289 { 290 global_counter++; 291 } 292 293 static int get_index(void) 294 { 295 volatile int index = 0; 296 bump_counter(); 297 return index; 298 } 299 300 #define check_self_op(fmt, op, sym, a, b) do { \ 301 typeof(a + 0) _a = a; \ 302 typeof(b + 0) _b = b; \ 303 typeof(a + 0) _a_sym = a; \ 304 typeof(a + 0) _a_orig[1] = { a }; \ 305 typeof(b + 0) _b_orig = b; \ 306 typeof(b + 0) _b_bump = b + 1; \ 307 typeof(a + 0) _r; \ 308 \ 309 _a_sym sym _b; \ 310 _r = wrapping_ ## op(_a, _b); \ 311 KUNIT_EXPECT_TRUE_MSG(test, _r == _a_sym, \ 312 "expected "fmt" "#op" "fmt" == "fmt", got "fmt"\n", \ 313 a, b, _a_sym, _r); \ 314 KUNIT_EXPECT_TRUE_MSG(test, _a == _a_sym, \ 315 "expected "fmt" "#op" "fmt" == "fmt", got "fmt"\n", \ 316 a, b, _a_sym, _a); \ 317 /* Check for internal macro side-effects. */ \ 318 global_counter = 0; \ 319 wrapping_ ## op(_a_orig[get_index()], _b_orig++); \ 320 KUNIT_EXPECT_EQ_MSG(test, global_counter, 1, \ 321 "Unexpected wrapping_" #op " macro side-effect on arg1!\n"); \ 322 KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, \ 323 "Unexpected wrapping_" #op " macro side-effect on arg2!\n"); \ 324 } while (0) 325 326 #define DEFINE_TEST_FUNC_TYPED(n, t, fmt) \ 327 static void do_test_ ## n(struct kunit *test, const struct test_ ## n *p) \ 328 { \ 329 /* check_{add,sub,mul}_overflow() and wrapping_{add,sub,mul} */ \ 330 check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of); \ 331 check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of); \ 332 check_one_op(t, fmt, sub, "-", p->a, p->b, p->diff, p->d_of); \ 333 check_one_op(t, fmt, mul, "*", p->a, p->b, p->prod, p->p_of); \ 334 check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of); \ 335 /* wrapping_assign_{add,sub}() */ \ 336 check_self_op(fmt, assign_add, +=, p->a, p->b); \ 337 check_self_op(fmt, assign_add, +=, p->b, p->a); \ 338 check_self_op(fmt, assign_sub, -=, p->a, p->b); \ 339 } \ 340 \ 341 static void n ## _overflow_test(struct kunit *test) { \ 342 unsigned i; \ 343 \ 344 SKIP_64_ON_32(__same_type(t, u64)); \ 345 SKIP_64_ON_32(__same_type(t, s64)); \ 346 SKIP_SIGN_MISMATCH(__same_type(n ## _tests[0].a, u32) && \ 347 __same_type(n ## _tests[0].b, u32) && \ 348 __same_type(n ## _tests[0].sum, int)); \ 349 \ 350 for (i = 0; i < ARRAY_SIZE(n ## _tests); ++i) \ 351 do_test_ ## n(test, &n ## _tests[i]); \ 352 kunit_info(test, "%zu %s arithmetic tests finished\n", \ 353 ARRAY_SIZE(n ## _tests), #n); \ 354 } 355 356 #define DEFINE_TEST_FUNC(t, fmt) \ 357 DEFINE_TEST_FUNC_TYPED(t ## _ ## t ## __ ## t, t, fmt) 358 359 DEFINE_TEST_FUNC(u8, "%d"); 360 DEFINE_TEST_FUNC(s8, "%d"); 361 DEFINE_TEST_FUNC(u16, "%d"); 362 DEFINE_TEST_FUNC(s16, "%d"); 363 DEFINE_TEST_FUNC(u32, "%u"); 364 DEFINE_TEST_FUNC(s32, "%d"); 365 DEFINE_TEST_FUNC(u64, "%llu"); 366 DEFINE_TEST_FUNC(s64, "%lld"); 367 368 DEFINE_TEST_ARRAY_TYPED(u32, u32, u8) = { 369 {0, 0, 0, 0, 0, false, false, false}, 370 {U8_MAX, 2, 1, U8_MAX - 2, U8_MAX - 1, true, false, true}, 371 {U8_MAX + 1, 0, 0, 0, 0, true, true, false}, 372 }; 373 DEFINE_TEST_FUNC_TYPED(u32_u32__u8, u8, "%d"); 374 375 DEFINE_TEST_ARRAY_TYPED(u32, u32, int) = { 376 {0, 0, 0, 0, 0, false, false, false}, 377 {U32_MAX, 0, -1, -1, 0, true, true, false}, 378 }; 379 DEFINE_TEST_FUNC_TYPED(u32_u32__int, int, "%d"); 380 381 DEFINE_TEST_ARRAY_TYPED(u8, u8, int) = { 382 {0, 0, 0, 0, 0, false, false, false}, 383 {U8_MAX, U8_MAX, 2 * U8_MAX, 0, U8_MAX * U8_MAX, false, false, false}, 384 {1, 2, 3, -1, 2, false, false, false}, 385 }; 386 DEFINE_TEST_FUNC_TYPED(u8_u8__int, int, "%d"); 387 388 DEFINE_TEST_ARRAY_TYPED(int, int, u8) = { 389 {0, 0, 0, 0, 0, false, false, false}, 390 {1, 2, 3, U8_MAX, 2, false, true, false}, 391 {-1, 0, U8_MAX, U8_MAX, 0, true, true, false}, 392 }; 393 DEFINE_TEST_FUNC_TYPED(int_int__u8, u8, "%d"); 394 395 /* Args are: value, shift, type, expected result, overflow expected */ 396 #define TEST_ONE_SHIFT(a, s, t, expect, of) do { \ 397 typeof(a) __a = (a); \ 398 typeof(s) __s = (s); \ 399 t __e = (expect); \ 400 t __d; \ 401 bool __of = check_shl_overflow(__a, __s, &__d); \ 402 if (__of != of) { \ 403 KUNIT_EXPECT_EQ_MSG(test, __of, of, \ 404 "expected (%s)(%s << %s) to%s overflow\n", \ 405 #t, #a, #s, of ? "" : " not"); \ 406 } else if (!__of && __d != __e) { \ 407 KUNIT_EXPECT_EQ_MSG(test, __d, __e, \ 408 "expected (%s)(%s << %s) == %s\n", \ 409 #t, #a, #s, #expect); \ 410 if ((t)-1 < 0) \ 411 kunit_info(test, "got %lld\n", (s64)__d); \ 412 else \ 413 kunit_info(test, "got %llu\n", (u64)__d); \ 414 } \ 415 count++; \ 416 } while (0) 417 418 static void shift_sane_test(struct kunit *test) 419 { 420 int count = 0; 421 422 /* Sane shifts. */ 423 TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false); 424 TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false); 425 TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false); 426 TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false); 427 TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false); 428 TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false); 429 TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false); 430 TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false); 431 TEST_ONE_SHIFT(1, 0, int, 1 << 0, false); 432 TEST_ONE_SHIFT(1, 16, int, 1 << 16, false); 433 TEST_ONE_SHIFT(1, 30, int, 1 << 30, false); 434 TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false); 435 TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false); 436 TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false); 437 TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false); 438 TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false); 439 TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false); 440 TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false); 441 TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false); 442 TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false); 443 TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false); 444 TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false); 445 TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false); 446 TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false); 447 TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false); 448 TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64, 0xFFFFFFFFULL << 32, false); 449 450 /* Sane shift: start and end with 0, without a too-wide shift. */ 451 TEST_ONE_SHIFT(0, 7, u8, 0, false); 452 TEST_ONE_SHIFT(0, 15, u16, 0, false); 453 TEST_ONE_SHIFT(0, 31, unsigned int, 0, false); 454 TEST_ONE_SHIFT(0, 31, u32, 0, false); 455 TEST_ONE_SHIFT(0, 63, u64, 0, false); 456 457 /* Sane shift: start and end with 0, without reaching signed bit. */ 458 TEST_ONE_SHIFT(0, 6, s8, 0, false); 459 TEST_ONE_SHIFT(0, 14, s16, 0, false); 460 TEST_ONE_SHIFT(0, 30, int, 0, false); 461 TEST_ONE_SHIFT(0, 30, s32, 0, false); 462 TEST_ONE_SHIFT(0, 62, s64, 0, false); 463 464 kunit_info(test, "%d sane shift tests finished\n", count); 465 } 466 467 static void shift_overflow_test(struct kunit *test) 468 { 469 int count = 0; 470 471 /* Overflow: shifted the bit off the end. */ 472 TEST_ONE_SHIFT(1, 8, u8, 0, true); 473 TEST_ONE_SHIFT(1, 16, u16, 0, true); 474 TEST_ONE_SHIFT(1, 32, unsigned int, 0, true); 475 TEST_ONE_SHIFT(1, 32, u32, 0, true); 476 TEST_ONE_SHIFT(1, 64, u64, 0, true); 477 478 /* Overflow: shifted into the signed bit. */ 479 TEST_ONE_SHIFT(1, 7, s8, 0, true); 480 TEST_ONE_SHIFT(1, 15, s16, 0, true); 481 TEST_ONE_SHIFT(1, 31, int, 0, true); 482 TEST_ONE_SHIFT(1, 31, s32, 0, true); 483 TEST_ONE_SHIFT(1, 63, s64, 0, true); 484 485 /* Overflow: high bit falls off unsigned types. */ 486 /* 10010110 */ 487 TEST_ONE_SHIFT(150, 1, u8, 0, true); 488 /* 1000100010010110 */ 489 TEST_ONE_SHIFT(34966, 1, u16, 0, true); 490 /* 10000100000010001000100010010110 */ 491 TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true); 492 TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true); 493 /* 1000001000010000010000000100000010000100000010001000100010010110 */ 494 TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true); 495 496 /* Overflow: bit shifted into signed bit on signed types. */ 497 /* 01001011 */ 498 TEST_ONE_SHIFT(75, 1, s8, 0, true); 499 /* 0100010001001011 */ 500 TEST_ONE_SHIFT(17483, 1, s16, 0, true); 501 /* 01000010000001000100010001001011 */ 502 TEST_ONE_SHIFT(1107575883, 1, s32, 0, true); 503 TEST_ONE_SHIFT(1107575883, 1, int, 0, true); 504 /* 0100000100001000001000000010000001000010000001000100010001001011 */ 505 TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true); 506 507 /* Overflow: bit shifted past signed bit on signed types. */ 508 /* 01001011 */ 509 TEST_ONE_SHIFT(75, 2, s8, 0, true); 510 /* 0100010001001011 */ 511 TEST_ONE_SHIFT(17483, 2, s16, 0, true); 512 /* 01000010000001000100010001001011 */ 513 TEST_ONE_SHIFT(1107575883, 2, s32, 0, true); 514 TEST_ONE_SHIFT(1107575883, 2, int, 0, true); 515 /* 0100000100001000001000000010000001000010000001000100010001001011 */ 516 TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true); 517 518 kunit_info(test, "%d overflow shift tests finished\n", count); 519 } 520 521 static void shift_truncate_test(struct kunit *test) 522 { 523 int count = 0; 524 525 /* Overflow: values larger than destination type. */ 526 TEST_ONE_SHIFT(0x100, 0, u8, 0, true); 527 TEST_ONE_SHIFT(0xFF, 0, s8, 0, true); 528 TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true); 529 TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true); 530 TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true); 531 TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true); 532 TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true); 533 TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true); 534 TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true); 535 536 /* Overflow: shifted at or beyond entire type's bit width. */ 537 TEST_ONE_SHIFT(0, 8, u8, 0, true); 538 TEST_ONE_SHIFT(0, 9, u8, 0, true); 539 TEST_ONE_SHIFT(0, 8, s8, 0, true); 540 TEST_ONE_SHIFT(0, 9, s8, 0, true); 541 TEST_ONE_SHIFT(0, 16, u16, 0, true); 542 TEST_ONE_SHIFT(0, 17, u16, 0, true); 543 TEST_ONE_SHIFT(0, 16, s16, 0, true); 544 TEST_ONE_SHIFT(0, 17, s16, 0, true); 545 TEST_ONE_SHIFT(0, 32, u32, 0, true); 546 TEST_ONE_SHIFT(0, 33, u32, 0, true); 547 TEST_ONE_SHIFT(0, 32, int, 0, true); 548 TEST_ONE_SHIFT(0, 33, int, 0, true); 549 TEST_ONE_SHIFT(0, 32, s32, 0, true); 550 TEST_ONE_SHIFT(0, 33, s32, 0, true); 551 TEST_ONE_SHIFT(0, 64, u64, 0, true); 552 TEST_ONE_SHIFT(0, 65, u64, 0, true); 553 TEST_ONE_SHIFT(0, 64, s64, 0, true); 554 TEST_ONE_SHIFT(0, 65, s64, 0, true); 555 556 kunit_info(test, "%d truncate shift tests finished\n", count); 557 } 558 559 static void shift_nonsense_test(struct kunit *test) 560 { 561 int count = 0; 562 563 /* Nonsense: negative initial value. */ 564 TEST_ONE_SHIFT(-1, 0, s8, 0, true); 565 TEST_ONE_SHIFT(-1, 0, u8, 0, true); 566 TEST_ONE_SHIFT(-5, 0, s16, 0, true); 567 TEST_ONE_SHIFT(-5, 0, u16, 0, true); 568 TEST_ONE_SHIFT(-10, 0, int, 0, true); 569 TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true); 570 TEST_ONE_SHIFT(-100, 0, s32, 0, true); 571 TEST_ONE_SHIFT(-100, 0, u32, 0, true); 572 TEST_ONE_SHIFT(-10000, 0, s64, 0, true); 573 TEST_ONE_SHIFT(-10000, 0, u64, 0, true); 574 575 /* Nonsense: negative shift values. */ 576 TEST_ONE_SHIFT(0, -5, s8, 0, true); 577 TEST_ONE_SHIFT(0, -5, u8, 0, true); 578 TEST_ONE_SHIFT(0, -10, s16, 0, true); 579 TEST_ONE_SHIFT(0, -10, u16, 0, true); 580 TEST_ONE_SHIFT(0, -15, int, 0, true); 581 TEST_ONE_SHIFT(0, -15, unsigned int, 0, true); 582 TEST_ONE_SHIFT(0, -20, s32, 0, true); 583 TEST_ONE_SHIFT(0, -20, u32, 0, true); 584 TEST_ONE_SHIFT(0, -30, s64, 0, true); 585 TEST_ONE_SHIFT(0, -30, u64, 0, true); 586 587 /* 588 * Corner case: for unsigned types, we fail when we've shifted 589 * through the entire width of bits. For signed types, we might 590 * want to match this behavior, but that would mean noticing if 591 * we shift through all but the signed bit, and this is not 592 * currently detected (but we'll notice an overflow into the 593 * signed bit). So, for now, we will test this condition but 594 * mark it as not expected to overflow. 595 */ 596 TEST_ONE_SHIFT(0, 7, s8, 0, false); 597 TEST_ONE_SHIFT(0, 15, s16, 0, false); 598 TEST_ONE_SHIFT(0, 31, int, 0, false); 599 TEST_ONE_SHIFT(0, 31, s32, 0, false); 600 TEST_ONE_SHIFT(0, 63, s64, 0, false); 601 602 kunit_info(test, "%d nonsense shift tests finished\n", count); 603 } 604 #undef TEST_ONE_SHIFT 605 606 /* 607 * Deal with the various forms of allocator arguments. See comments above 608 * the DEFINE_TEST_ALLOC() instances for mapping of the "bits". 609 */ 610 #define alloc_GFP (GFP_KERNEL | __GFP_NOWARN) 611 #define alloc010(alloc, arg, sz) alloc(sz, alloc_GFP) 612 #define alloc011(alloc, arg, sz) alloc(sz, alloc_GFP, NUMA_NO_NODE) 613 #define alloc000(alloc, arg, sz) alloc(sz) 614 #define alloc001(alloc, arg, sz) alloc(sz, NUMA_NO_NODE) 615 #define alloc110(alloc, arg, sz) alloc(arg, sz, alloc_GFP) 616 #define free0(free, arg, ptr) free(ptr) 617 #define free1(free, arg, ptr) free(arg, ptr) 618 619 /* Wrap around to 16K */ 620 #define TEST_SIZE (5 * 4096) 621 622 #define DEFINE_TEST_ALLOC(func, free_func, want_arg, want_gfp, want_node)\ 623 static void test_ ## func (struct kunit *test, void *arg) \ 624 { \ 625 volatile size_t a = TEST_SIZE; \ 626 volatile size_t b = (SIZE_MAX / TEST_SIZE) + 1; \ 627 void *ptr; \ 628 \ 629 /* Tiny allocation test. */ \ 630 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, 1);\ 631 KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \ 632 #func " failed regular allocation?!\n"); \ 633 free ## want_arg (free_func, arg, ptr); \ 634 \ 635 /* Wrapped allocation test. */ \ 636 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \ 637 a * b); \ 638 KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \ 639 #func " unexpectedly failed bad wrapping?!\n"); \ 640 free ## want_arg (free_func, arg, ptr); \ 641 \ 642 /* Saturated allocation test. */ \ 643 ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \ 644 array_size(a, b)); \ 645 if (ptr) { \ 646 KUNIT_FAIL(test, #func " missed saturation!\n"); \ 647 free ## want_arg (free_func, arg, ptr); \ 648 } \ 649 } 650 651 /* 652 * Allocator uses a trailing node argument --------+ (e.g. kmalloc_node()) 653 * Allocator uses the gfp_t argument -----------+ | (e.g. kmalloc()) 654 * Allocator uses a special leading argument + | | (e.g. devm_kmalloc()) 655 * | | | 656 */ 657 DEFINE_TEST_ALLOC(kmalloc, kfree, 0, 1, 0); 658 DEFINE_TEST_ALLOC(kmalloc_node, kfree, 0, 1, 1); 659 DEFINE_TEST_ALLOC(kzalloc, kfree, 0, 1, 0); 660 DEFINE_TEST_ALLOC(kzalloc_node, kfree, 0, 1, 1); 661 DEFINE_TEST_ALLOC(__vmalloc, vfree, 0, 1, 0); 662 DEFINE_TEST_ALLOC(kvmalloc, kvfree, 0, 1, 0); 663 DEFINE_TEST_ALLOC(kvmalloc_node, kvfree, 0, 1, 1); 664 DEFINE_TEST_ALLOC(kvzalloc, kvfree, 0, 1, 0); 665 DEFINE_TEST_ALLOC(kvzalloc_node, kvfree, 0, 1, 1); 666 DEFINE_TEST_ALLOC(devm_kmalloc, devm_kfree, 1, 1, 0); 667 DEFINE_TEST_ALLOC(devm_kzalloc, devm_kfree, 1, 1, 0); 668 669 static void overflow_allocation_test(struct kunit *test) 670 { 671 struct device *dev; 672 int count = 0; 673 674 #define check_allocation_overflow(alloc) do { \ 675 count++; \ 676 test_ ## alloc(test, dev); \ 677 } while (0) 678 679 /* Create dummy device for devm_kmalloc()-family tests. */ 680 dev = kunit_device_register(test, "overflow-test"); 681 KUNIT_ASSERT_FALSE_MSG(test, IS_ERR(dev), 682 "Cannot register test device\n"); 683 684 check_allocation_overflow(kmalloc); 685 check_allocation_overflow(kmalloc_node); 686 check_allocation_overflow(kzalloc); 687 check_allocation_overflow(kzalloc_node); 688 check_allocation_overflow(__vmalloc); 689 check_allocation_overflow(kvmalloc); 690 check_allocation_overflow(kvmalloc_node); 691 check_allocation_overflow(kvzalloc); 692 check_allocation_overflow(kvzalloc_node); 693 check_allocation_overflow(devm_kmalloc); 694 check_allocation_overflow(devm_kzalloc); 695 696 kunit_info(test, "%d allocation overflow tests finished\n", count); 697 #undef check_allocation_overflow 698 } 699 700 struct __test_flex_array { 701 unsigned long flags; 702 size_t count; 703 unsigned long data[]; 704 }; 705 706 static void overflow_size_helpers_test(struct kunit *test) 707 { 708 /* Make sure struct_size() can be used in a constant expression. */ 709 u8 ce_array[struct_size_t(struct __test_flex_array, data, 55)]; 710 struct __test_flex_array *obj; 711 int count = 0; 712 int var; 713 volatile int unconst = 0; 714 715 /* Verify constant expression against runtime version. */ 716 var = 55; 717 OPTIMIZER_HIDE_VAR(var); 718 KUNIT_EXPECT_EQ(test, sizeof(ce_array), struct_size(obj, data, var)); 719 720 #define check_one_size_helper(expected, func, args...) do { \ 721 size_t _r = func(args); \ 722 KUNIT_EXPECT_EQ_MSG(test, _r, expected, \ 723 "expected " #func "(" #args ") to return %zu but got %zu instead\n", \ 724 (size_t)(expected), _r); \ 725 count++; \ 726 } while (0) 727 728 var = 4; 729 check_one_size_helper(20, size_mul, var++, 5); 730 check_one_size_helper(20, size_mul, 4, var++); 731 check_one_size_helper(0, size_mul, 0, 3); 732 check_one_size_helper(0, size_mul, 3, 0); 733 check_one_size_helper(6, size_mul, 2, 3); 734 check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 1); 735 check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 3); 736 check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, -3); 737 738 var = 4; 739 check_one_size_helper(9, size_add, var++, 5); 740 check_one_size_helper(9, size_add, 4, var++); 741 check_one_size_helper(9, size_add, 9, 0); 742 check_one_size_helper(9, size_add, 0, 9); 743 check_one_size_helper(5, size_add, 2, 3); 744 check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 1); 745 check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 3); 746 check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, -3); 747 748 var = 4; 749 check_one_size_helper(1, size_sub, var--, 3); 750 check_one_size_helper(1, size_sub, 4, var--); 751 check_one_size_helper(1, size_sub, 3, 2); 752 check_one_size_helper(9, size_sub, 9, 0); 753 check_one_size_helper(SIZE_MAX, size_sub, 9, -3); 754 check_one_size_helper(SIZE_MAX, size_sub, 0, 9); 755 check_one_size_helper(SIZE_MAX, size_sub, 2, 3); 756 check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 0); 757 check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 10); 758 check_one_size_helper(SIZE_MAX, size_sub, 0, SIZE_MAX); 759 check_one_size_helper(SIZE_MAX, size_sub, 14, SIZE_MAX); 760 check_one_size_helper(SIZE_MAX - 2, size_sub, SIZE_MAX - 1, 1); 761 check_one_size_helper(SIZE_MAX - 4, size_sub, SIZE_MAX - 1, 3); 762 check_one_size_helper(1, size_sub, SIZE_MAX - 1, -3); 763 764 var = 4; 765 check_one_size_helper(4 * sizeof(*obj->data), 766 flex_array_size, obj, data, var++); 767 check_one_size_helper(5 * sizeof(*obj->data), 768 flex_array_size, obj, data, var++); 769 check_one_size_helper(0, flex_array_size, obj, data, 0 + unconst); 770 check_one_size_helper(sizeof(*obj->data), 771 flex_array_size, obj, data, 1 + unconst); 772 check_one_size_helper(7 * sizeof(*obj->data), 773 flex_array_size, obj, data, 7 + unconst); 774 check_one_size_helper(SIZE_MAX, 775 flex_array_size, obj, data, -1 + unconst); 776 check_one_size_helper(SIZE_MAX, 777 flex_array_size, obj, data, SIZE_MAX - 4 + unconst); 778 779 var = 4; 780 check_one_size_helper(sizeof(*obj) + (4 * sizeof(*obj->data)), 781 struct_size, obj, data, var++); 782 check_one_size_helper(sizeof(*obj) + (5 * sizeof(*obj->data)), 783 struct_size, obj, data, var++); 784 check_one_size_helper(sizeof(*obj), struct_size, obj, data, 0 + unconst); 785 check_one_size_helper(sizeof(*obj) + sizeof(*obj->data), 786 struct_size, obj, data, 1 + unconst); 787 check_one_size_helper(SIZE_MAX, 788 struct_size, obj, data, -3 + unconst); 789 check_one_size_helper(SIZE_MAX, 790 struct_size, obj, data, SIZE_MAX - 3 + unconst); 791 792 kunit_info(test, "%d overflow size helper tests finished\n", count); 793 #undef check_one_size_helper 794 } 795 796 static void overflows_type_test(struct kunit *test) 797 { 798 int count = 0; 799 unsigned int var; 800 801 #define __TEST_OVERFLOWS_TYPE(func, arg1, arg2, of) do { \ 802 bool __of = func(arg1, arg2); \ 803 KUNIT_EXPECT_EQ_MSG(test, __of, of, \ 804 "expected " #func "(" #arg1 ", " #arg2 " to%s overflow\n",\ 805 of ? "" : " not"); \ 806 count++; \ 807 } while (0) 808 809 /* Args are: first type, second type, value, overflow expected */ 810 #define TEST_OVERFLOWS_TYPE(__t1, __t2, v, of) do { \ 811 __t1 t1 = (v); \ 812 __t2 t2; \ 813 __TEST_OVERFLOWS_TYPE(__overflows_type, t1, t2, of); \ 814 __TEST_OVERFLOWS_TYPE(__overflows_type, t1, __t2, of); \ 815 __TEST_OVERFLOWS_TYPE(__overflows_type_constexpr, t1, t2, of); \ 816 __TEST_OVERFLOWS_TYPE(__overflows_type_constexpr, t1, __t2, of);\ 817 } while (0) 818 819 TEST_OVERFLOWS_TYPE(u8, u8, U8_MAX, false); 820 TEST_OVERFLOWS_TYPE(u8, u16, U8_MAX, false); 821 TEST_OVERFLOWS_TYPE(u8, s8, U8_MAX, true); 822 TEST_OVERFLOWS_TYPE(u8, s8, S8_MAX, false); 823 TEST_OVERFLOWS_TYPE(u8, s8, (u8)S8_MAX + 1, true); 824 TEST_OVERFLOWS_TYPE(u8, s16, U8_MAX, false); 825 TEST_OVERFLOWS_TYPE(s8, u8, S8_MAX, false); 826 TEST_OVERFLOWS_TYPE(s8, u8, -1, true); 827 TEST_OVERFLOWS_TYPE(s8, u8, S8_MIN, true); 828 TEST_OVERFLOWS_TYPE(s8, u16, S8_MAX, false); 829 TEST_OVERFLOWS_TYPE(s8, u16, -1, true); 830 TEST_OVERFLOWS_TYPE(s8, u16, S8_MIN, true); 831 TEST_OVERFLOWS_TYPE(s8, u32, S8_MAX, false); 832 TEST_OVERFLOWS_TYPE(s8, u32, -1, true); 833 TEST_OVERFLOWS_TYPE(s8, u32, S8_MIN, true); 834 #if BITS_PER_LONG == 64 835 TEST_OVERFLOWS_TYPE(s8, u64, S8_MAX, false); 836 TEST_OVERFLOWS_TYPE(s8, u64, -1, true); 837 TEST_OVERFLOWS_TYPE(s8, u64, S8_MIN, true); 838 #endif 839 TEST_OVERFLOWS_TYPE(s8, s8, S8_MAX, false); 840 TEST_OVERFLOWS_TYPE(s8, s8, S8_MIN, false); 841 TEST_OVERFLOWS_TYPE(s8, s16, S8_MAX, false); 842 TEST_OVERFLOWS_TYPE(s8, s16, S8_MIN, false); 843 TEST_OVERFLOWS_TYPE(u16, u8, U8_MAX, false); 844 TEST_OVERFLOWS_TYPE(u16, u8, (u16)U8_MAX + 1, true); 845 TEST_OVERFLOWS_TYPE(u16, u8, U16_MAX, true); 846 TEST_OVERFLOWS_TYPE(u16, s8, S8_MAX, false); 847 TEST_OVERFLOWS_TYPE(u16, s8, (u16)S8_MAX + 1, true); 848 TEST_OVERFLOWS_TYPE(u16, s8, U16_MAX, true); 849 TEST_OVERFLOWS_TYPE(u16, s16, S16_MAX, false); 850 TEST_OVERFLOWS_TYPE(u16, s16, (u16)S16_MAX + 1, true); 851 TEST_OVERFLOWS_TYPE(u16, s16, U16_MAX, true); 852 TEST_OVERFLOWS_TYPE(u16, u32, U16_MAX, false); 853 TEST_OVERFLOWS_TYPE(u16, s32, U16_MAX, false); 854 TEST_OVERFLOWS_TYPE(s16, u8, U8_MAX, false); 855 TEST_OVERFLOWS_TYPE(s16, u8, (s16)U8_MAX + 1, true); 856 TEST_OVERFLOWS_TYPE(s16, u8, -1, true); 857 TEST_OVERFLOWS_TYPE(s16, u8, S16_MIN, true); 858 TEST_OVERFLOWS_TYPE(s16, u16, S16_MAX, false); 859 TEST_OVERFLOWS_TYPE(s16, u16, -1, true); 860 TEST_OVERFLOWS_TYPE(s16, u16, S16_MIN, true); 861 TEST_OVERFLOWS_TYPE(s16, u32, S16_MAX, false); 862 TEST_OVERFLOWS_TYPE(s16, u32, -1, true); 863 TEST_OVERFLOWS_TYPE(s16, u32, S16_MIN, true); 864 #if BITS_PER_LONG == 64 865 TEST_OVERFLOWS_TYPE(s16, u64, S16_MAX, false); 866 TEST_OVERFLOWS_TYPE(s16, u64, -1, true); 867 TEST_OVERFLOWS_TYPE(s16, u64, S16_MIN, true); 868 #endif 869 TEST_OVERFLOWS_TYPE(s16, s8, S8_MAX, false); 870 TEST_OVERFLOWS_TYPE(s16, s8, S8_MIN, false); 871 TEST_OVERFLOWS_TYPE(s16, s8, (s16)S8_MAX + 1, true); 872 TEST_OVERFLOWS_TYPE(s16, s8, (s16)S8_MIN - 1, true); 873 TEST_OVERFLOWS_TYPE(s16, s8, S16_MAX, true); 874 TEST_OVERFLOWS_TYPE(s16, s8, S16_MIN, true); 875 TEST_OVERFLOWS_TYPE(s16, s16, S16_MAX, false); 876 TEST_OVERFLOWS_TYPE(s16, s16, S16_MIN, false); 877 TEST_OVERFLOWS_TYPE(s16, s32, S16_MAX, false); 878 TEST_OVERFLOWS_TYPE(s16, s32, S16_MIN, false); 879 TEST_OVERFLOWS_TYPE(u32, u8, U8_MAX, false); 880 TEST_OVERFLOWS_TYPE(u32, u8, (u32)U8_MAX + 1, true); 881 TEST_OVERFLOWS_TYPE(u32, u8, U32_MAX, true); 882 TEST_OVERFLOWS_TYPE(u32, s8, S8_MAX, false); 883 TEST_OVERFLOWS_TYPE(u32, s8, (u32)S8_MAX + 1, true); 884 TEST_OVERFLOWS_TYPE(u32, s8, U32_MAX, true); 885 TEST_OVERFLOWS_TYPE(u32, u16, U16_MAX, false); 886 TEST_OVERFLOWS_TYPE(u32, u16, U16_MAX + 1, true); 887 TEST_OVERFLOWS_TYPE(u32, u16, U32_MAX, true); 888 TEST_OVERFLOWS_TYPE(u32, s16, S16_MAX, false); 889 TEST_OVERFLOWS_TYPE(u32, s16, (u32)S16_MAX + 1, true); 890 TEST_OVERFLOWS_TYPE(u32, s16, U32_MAX, true); 891 TEST_OVERFLOWS_TYPE(u32, u32, U32_MAX, false); 892 TEST_OVERFLOWS_TYPE(u32, s32, S32_MAX, false); 893 TEST_OVERFLOWS_TYPE(u32, s32, U32_MAX, true); 894 TEST_OVERFLOWS_TYPE(u32, s32, (u32)S32_MAX + 1, true); 895 #if BITS_PER_LONG == 64 896 TEST_OVERFLOWS_TYPE(u32, u64, U32_MAX, false); 897 TEST_OVERFLOWS_TYPE(u32, s64, U32_MAX, false); 898 #endif 899 TEST_OVERFLOWS_TYPE(s32, u8, U8_MAX, false); 900 TEST_OVERFLOWS_TYPE(s32, u8, (s32)U8_MAX + 1, true); 901 TEST_OVERFLOWS_TYPE(s32, u16, S32_MAX, true); 902 TEST_OVERFLOWS_TYPE(s32, u8, -1, true); 903 TEST_OVERFLOWS_TYPE(s32, u8, S32_MIN, true); 904 TEST_OVERFLOWS_TYPE(s32, u16, U16_MAX, false); 905 TEST_OVERFLOWS_TYPE(s32, u16, (s32)U16_MAX + 1, true); 906 TEST_OVERFLOWS_TYPE(s32, u16, S32_MAX, true); 907 TEST_OVERFLOWS_TYPE(s32, u16, -1, true); 908 TEST_OVERFLOWS_TYPE(s32, u16, S32_MIN, true); 909 TEST_OVERFLOWS_TYPE(s32, u32, S32_MAX, false); 910 TEST_OVERFLOWS_TYPE(s32, u32, -1, true); 911 TEST_OVERFLOWS_TYPE(s32, u32, S32_MIN, true); 912 #if BITS_PER_LONG == 64 913 TEST_OVERFLOWS_TYPE(s32, u64, S32_MAX, false); 914 TEST_OVERFLOWS_TYPE(s32, u64, -1, true); 915 TEST_OVERFLOWS_TYPE(s32, u64, S32_MIN, true); 916 #endif 917 TEST_OVERFLOWS_TYPE(s32, s8, S8_MAX, false); 918 TEST_OVERFLOWS_TYPE(s32, s8, S8_MIN, false); 919 TEST_OVERFLOWS_TYPE(s32, s8, (s32)S8_MAX + 1, true); 920 TEST_OVERFLOWS_TYPE(s32, s8, (s32)S8_MIN - 1, true); 921 TEST_OVERFLOWS_TYPE(s32, s8, S32_MAX, true); 922 TEST_OVERFLOWS_TYPE(s32, s8, S32_MIN, true); 923 TEST_OVERFLOWS_TYPE(s32, s16, S16_MAX, false); 924 TEST_OVERFLOWS_TYPE(s32, s16, S16_MIN, false); 925 TEST_OVERFLOWS_TYPE(s32, s16, (s32)S16_MAX + 1, true); 926 TEST_OVERFLOWS_TYPE(s32, s16, (s32)S16_MIN - 1, true); 927 TEST_OVERFLOWS_TYPE(s32, s16, S32_MAX, true); 928 TEST_OVERFLOWS_TYPE(s32, s16, S32_MIN, true); 929 TEST_OVERFLOWS_TYPE(s32, s32, S32_MAX, false); 930 TEST_OVERFLOWS_TYPE(s32, s32, S32_MIN, false); 931 #if BITS_PER_LONG == 64 932 TEST_OVERFLOWS_TYPE(s32, s64, S32_MAX, false); 933 TEST_OVERFLOWS_TYPE(s32, s64, S32_MIN, false); 934 TEST_OVERFLOWS_TYPE(u64, u8, U64_MAX, true); 935 TEST_OVERFLOWS_TYPE(u64, u8, U8_MAX, false); 936 TEST_OVERFLOWS_TYPE(u64, u8, (u64)U8_MAX + 1, true); 937 TEST_OVERFLOWS_TYPE(u64, u16, U64_MAX, true); 938 TEST_OVERFLOWS_TYPE(u64, u16, U16_MAX, false); 939 TEST_OVERFLOWS_TYPE(u64, u16, (u64)U16_MAX + 1, true); 940 TEST_OVERFLOWS_TYPE(u64, u32, U64_MAX, true); 941 TEST_OVERFLOWS_TYPE(u64, u32, U32_MAX, false); 942 TEST_OVERFLOWS_TYPE(u64, u32, (u64)U32_MAX + 1, true); 943 TEST_OVERFLOWS_TYPE(u64, u64, U64_MAX, false); 944 TEST_OVERFLOWS_TYPE(u64, s8, S8_MAX, false); 945 TEST_OVERFLOWS_TYPE(u64, s8, (u64)S8_MAX + 1, true); 946 TEST_OVERFLOWS_TYPE(u64, s8, U64_MAX, true); 947 TEST_OVERFLOWS_TYPE(u64, s16, S16_MAX, false); 948 TEST_OVERFLOWS_TYPE(u64, s16, (u64)S16_MAX + 1, true); 949 TEST_OVERFLOWS_TYPE(u64, s16, U64_MAX, true); 950 TEST_OVERFLOWS_TYPE(u64, s32, S32_MAX, false); 951 TEST_OVERFLOWS_TYPE(u64, s32, (u64)S32_MAX + 1, true); 952 TEST_OVERFLOWS_TYPE(u64, s32, U64_MAX, true); 953 TEST_OVERFLOWS_TYPE(u64, s64, S64_MAX, false); 954 TEST_OVERFLOWS_TYPE(u64, s64, U64_MAX, true); 955 TEST_OVERFLOWS_TYPE(u64, s64, (u64)S64_MAX + 1, true); 956 TEST_OVERFLOWS_TYPE(s64, u8, S64_MAX, true); 957 TEST_OVERFLOWS_TYPE(s64, u8, S64_MIN, true); 958 TEST_OVERFLOWS_TYPE(s64, u8, -1, true); 959 TEST_OVERFLOWS_TYPE(s64, u8, U8_MAX, false); 960 TEST_OVERFLOWS_TYPE(s64, u8, (s64)U8_MAX + 1, true); 961 TEST_OVERFLOWS_TYPE(s64, u16, S64_MAX, true); 962 TEST_OVERFLOWS_TYPE(s64, u16, S64_MIN, true); 963 TEST_OVERFLOWS_TYPE(s64, u16, -1, true); 964 TEST_OVERFLOWS_TYPE(s64, u16, U16_MAX, false); 965 TEST_OVERFLOWS_TYPE(s64, u16, (s64)U16_MAX + 1, true); 966 TEST_OVERFLOWS_TYPE(s64, u32, S64_MAX, true); 967 TEST_OVERFLOWS_TYPE(s64, u32, S64_MIN, true); 968 TEST_OVERFLOWS_TYPE(s64, u32, -1, true); 969 TEST_OVERFLOWS_TYPE(s64, u32, U32_MAX, false); 970 TEST_OVERFLOWS_TYPE(s64, u32, (s64)U32_MAX + 1, true); 971 TEST_OVERFLOWS_TYPE(s64, u64, S64_MAX, false); 972 TEST_OVERFLOWS_TYPE(s64, u64, S64_MIN, true); 973 TEST_OVERFLOWS_TYPE(s64, u64, -1, true); 974 TEST_OVERFLOWS_TYPE(s64, s8, S8_MAX, false); 975 TEST_OVERFLOWS_TYPE(s64, s8, S8_MIN, false); 976 TEST_OVERFLOWS_TYPE(s64, s8, (s64)S8_MAX + 1, true); 977 TEST_OVERFLOWS_TYPE(s64, s8, (s64)S8_MIN - 1, true); 978 TEST_OVERFLOWS_TYPE(s64, s8, S64_MAX, true); 979 TEST_OVERFLOWS_TYPE(s64, s16, S16_MAX, false); 980 TEST_OVERFLOWS_TYPE(s64, s16, S16_MIN, false); 981 TEST_OVERFLOWS_TYPE(s64, s16, (s64)S16_MAX + 1, true); 982 TEST_OVERFLOWS_TYPE(s64, s16, (s64)S16_MIN - 1, true); 983 TEST_OVERFLOWS_TYPE(s64, s16, S64_MAX, true); 984 TEST_OVERFLOWS_TYPE(s64, s32, S32_MAX, false); 985 TEST_OVERFLOWS_TYPE(s64, s32, S32_MIN, false); 986 TEST_OVERFLOWS_TYPE(s64, s32, (s64)S32_MAX + 1, true); 987 TEST_OVERFLOWS_TYPE(s64, s32, (s64)S32_MIN - 1, true); 988 TEST_OVERFLOWS_TYPE(s64, s32, S64_MAX, true); 989 TEST_OVERFLOWS_TYPE(s64, s64, S64_MAX, false); 990 TEST_OVERFLOWS_TYPE(s64, s64, S64_MIN, false); 991 #endif 992 993 /* Check for macro side-effects. */ 994 var = INT_MAX - 1; 995 __TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, false); 996 __TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, false); 997 __TEST_OVERFLOWS_TYPE(__overflows_type, var++, int, true); 998 var = INT_MAX - 1; 999 __TEST_OVERFLOWS_TYPE(overflows_type, var++, int, false); 1000 __TEST_OVERFLOWS_TYPE(overflows_type, var++, int, false); 1001 __TEST_OVERFLOWS_TYPE(overflows_type, var++, int, true); 1002 1003 kunit_info(test, "%d overflows_type() tests finished\n", count); 1004 #undef TEST_OVERFLOWS_TYPE 1005 #undef __TEST_OVERFLOWS_TYPE 1006 } 1007 1008 static void same_type_test(struct kunit *test) 1009 { 1010 int count = 0; 1011 int var; 1012 1013 #define TEST_SAME_TYPE(t1, t2, same) do { \ 1014 typeof(t1) __t1h = type_max(t1); \ 1015 typeof(t1) __t1l = type_min(t1); \ 1016 typeof(t2) __t2h = type_max(t2); \ 1017 typeof(t2) __t2l = type_min(t2); \ 1018 KUNIT_EXPECT_EQ(test, true, __same_type(t1, __t1h)); \ 1019 KUNIT_EXPECT_EQ(test, true, __same_type(t1, __t1l)); \ 1020 KUNIT_EXPECT_EQ(test, true, __same_type(__t1h, t1)); \ 1021 KUNIT_EXPECT_EQ(test, true, __same_type(__t1l, t1)); \ 1022 KUNIT_EXPECT_EQ(test, true, __same_type(t2, __t2h)); \ 1023 KUNIT_EXPECT_EQ(test, true, __same_type(t2, __t2l)); \ 1024 KUNIT_EXPECT_EQ(test, true, __same_type(__t2h, t2)); \ 1025 KUNIT_EXPECT_EQ(test, true, __same_type(__t2l, t2)); \ 1026 KUNIT_EXPECT_EQ(test, same, __same_type(t1, t2)); \ 1027 KUNIT_EXPECT_EQ(test, same, __same_type(t2, __t1h)); \ 1028 KUNIT_EXPECT_EQ(test, same, __same_type(t2, __t1l)); \ 1029 KUNIT_EXPECT_EQ(test, same, __same_type(__t1h, t2)); \ 1030 KUNIT_EXPECT_EQ(test, same, __same_type(__t1l, t2)); \ 1031 KUNIT_EXPECT_EQ(test, same, __same_type(t1, __t2h)); \ 1032 KUNIT_EXPECT_EQ(test, same, __same_type(t1, __t2l)); \ 1033 KUNIT_EXPECT_EQ(test, same, __same_type(__t2h, t1)); \ 1034 KUNIT_EXPECT_EQ(test, same, __same_type(__t2l, t1)); \ 1035 } while (0) 1036 1037 #if BITS_PER_LONG == 64 1038 # define TEST_SAME_TYPE64(base, t, m) TEST_SAME_TYPE(base, t, m) 1039 #else 1040 # define TEST_SAME_TYPE64(base, t, m) do { } while (0) 1041 #endif 1042 1043 #define TEST_TYPE_SETS(base, mu8, mu16, mu32, ms8, ms16, ms32, mu64, ms64) \ 1044 do { \ 1045 TEST_SAME_TYPE(base, u8, mu8); \ 1046 TEST_SAME_TYPE(base, u16, mu16); \ 1047 TEST_SAME_TYPE(base, u32, mu32); \ 1048 TEST_SAME_TYPE(base, s8, ms8); \ 1049 TEST_SAME_TYPE(base, s16, ms16); \ 1050 TEST_SAME_TYPE(base, s32, ms32); \ 1051 TEST_SAME_TYPE64(base, u64, mu64); \ 1052 TEST_SAME_TYPE64(base, s64, ms64); \ 1053 } while (0) 1054 1055 TEST_TYPE_SETS(u8, true, false, false, false, false, false, false, false); 1056 TEST_TYPE_SETS(u16, false, true, false, false, false, false, false, false); 1057 TEST_TYPE_SETS(u32, false, false, true, false, false, false, false, false); 1058 TEST_TYPE_SETS(s8, false, false, false, true, false, false, false, false); 1059 TEST_TYPE_SETS(s16, false, false, false, false, true, false, false, false); 1060 TEST_TYPE_SETS(s32, false, false, false, false, false, true, false, false); 1061 #if BITS_PER_LONG == 64 1062 TEST_TYPE_SETS(u64, false, false, false, false, false, false, true, false); 1063 TEST_TYPE_SETS(s64, false, false, false, false, false, false, false, true); 1064 #endif 1065 1066 /* Check for macro side-effects. */ 1067 var = 4; 1068 KUNIT_EXPECT_EQ(test, var, 4); 1069 KUNIT_EXPECT_TRUE(test, __same_type(var++, int)); 1070 KUNIT_EXPECT_EQ(test, var, 4); 1071 KUNIT_EXPECT_TRUE(test, __same_type(int, var++)); 1072 KUNIT_EXPECT_EQ(test, var, 4); 1073 KUNIT_EXPECT_TRUE(test, __same_type(var++, var++)); 1074 KUNIT_EXPECT_EQ(test, var, 4); 1075 1076 kunit_info(test, "%d __same_type() tests finished\n", count); 1077 1078 #undef TEST_TYPE_SETS 1079 #undef TEST_SAME_TYPE64 1080 #undef TEST_SAME_TYPE 1081 } 1082 1083 static void castable_to_type_test(struct kunit *test) 1084 { 1085 int count = 0; 1086 1087 #define TEST_CASTABLE_TO_TYPE(arg1, arg2, pass) do { \ 1088 bool __pass = castable_to_type(arg1, arg2); \ 1089 KUNIT_EXPECT_EQ_MSG(test, __pass, pass, \ 1090 "expected castable_to_type(" #arg1 ", " #arg2 ") to%s pass\n",\ 1091 pass ? "" : " not"); \ 1092 count++; \ 1093 } while (0) 1094 1095 TEST_CASTABLE_TO_TYPE(16, u8, true); 1096 TEST_CASTABLE_TO_TYPE(16, u16, true); 1097 TEST_CASTABLE_TO_TYPE(16, u32, true); 1098 TEST_CASTABLE_TO_TYPE(16, s8, true); 1099 TEST_CASTABLE_TO_TYPE(16, s16, true); 1100 TEST_CASTABLE_TO_TYPE(16, s32, true); 1101 TEST_CASTABLE_TO_TYPE(-16, s8, true); 1102 TEST_CASTABLE_TO_TYPE(-16, s16, true); 1103 TEST_CASTABLE_TO_TYPE(-16, s32, true); 1104 #if BITS_PER_LONG == 64 1105 TEST_CASTABLE_TO_TYPE(16, u64, true); 1106 TEST_CASTABLE_TO_TYPE(-16, s64, true); 1107 #endif 1108 1109 #define TEST_CASTABLE_TO_TYPE_VAR(width) do { \ 1110 u ## width u ## width ## var = 0; \ 1111 s ## width s ## width ## var = 0; \ 1112 \ 1113 /* Constant expressions that fit types. */ \ 1114 TEST_CASTABLE_TO_TYPE(type_max(u ## width), u ## width, true); \ 1115 TEST_CASTABLE_TO_TYPE(type_min(u ## width), u ## width, true); \ 1116 TEST_CASTABLE_TO_TYPE(type_max(u ## width), u ## width ## var, true); \ 1117 TEST_CASTABLE_TO_TYPE(type_min(u ## width), u ## width ## var, true); \ 1118 TEST_CASTABLE_TO_TYPE(type_max(s ## width), s ## width, true); \ 1119 TEST_CASTABLE_TO_TYPE(type_min(s ## width), s ## width, true); \ 1120 TEST_CASTABLE_TO_TYPE(type_max(s ## width), s ## width ## var, true); \ 1121 TEST_CASTABLE_TO_TYPE(type_min(u ## width), s ## width ## var, true); \ 1122 /* Constant expressions that do not fit types. */ \ 1123 TEST_CASTABLE_TO_TYPE(type_max(u ## width), s ## width, false); \ 1124 TEST_CASTABLE_TO_TYPE(type_max(u ## width), s ## width ## var, false); \ 1125 TEST_CASTABLE_TO_TYPE(type_min(s ## width), u ## width, false); \ 1126 TEST_CASTABLE_TO_TYPE(type_min(s ## width), u ## width ## var, false); \ 1127 /* Non-constant expression with mismatched type. */ \ 1128 TEST_CASTABLE_TO_TYPE(s ## width ## var, u ## width, false); \ 1129 TEST_CASTABLE_TO_TYPE(u ## width ## var, s ## width, false); \ 1130 } while (0) 1131 1132 #define TEST_CASTABLE_TO_TYPE_RANGE(width) do { \ 1133 unsigned long big = U ## width ## _MAX; \ 1134 signed long small = S ## width ## _MIN; \ 1135 u ## width u ## width ## var = 0; \ 1136 s ## width s ## width ## var = 0; \ 1137 \ 1138 /* Constant expression in range. */ \ 1139 TEST_CASTABLE_TO_TYPE(U ## width ## _MAX, u ## width, true); \ 1140 TEST_CASTABLE_TO_TYPE(U ## width ## _MAX, u ## width ## var, true); \ 1141 TEST_CASTABLE_TO_TYPE(S ## width ## _MIN, s ## width, true); \ 1142 TEST_CASTABLE_TO_TYPE(S ## width ## _MIN, s ## width ## var, true); \ 1143 /* Constant expression out of range. */ \ 1144 TEST_CASTABLE_TO_TYPE((unsigned long)U ## width ## _MAX + 1, u ## width, false); \ 1145 TEST_CASTABLE_TO_TYPE((unsigned long)U ## width ## _MAX + 1, u ## width ## var, false); \ 1146 TEST_CASTABLE_TO_TYPE((signed long)S ## width ## _MIN - 1, s ## width, false); \ 1147 TEST_CASTABLE_TO_TYPE((signed long)S ## width ## _MIN - 1, s ## width ## var, false); \ 1148 /* Non-constant expression with mismatched type. */ \ 1149 TEST_CASTABLE_TO_TYPE(big, u ## width, false); \ 1150 TEST_CASTABLE_TO_TYPE(big, u ## width ## var, false); \ 1151 TEST_CASTABLE_TO_TYPE(small, s ## width, false); \ 1152 TEST_CASTABLE_TO_TYPE(small, s ## width ## var, false); \ 1153 } while (0) 1154 1155 TEST_CASTABLE_TO_TYPE_VAR(8); 1156 TEST_CASTABLE_TO_TYPE_VAR(16); 1157 TEST_CASTABLE_TO_TYPE_VAR(32); 1158 #if BITS_PER_LONG == 64 1159 TEST_CASTABLE_TO_TYPE_VAR(64); 1160 #endif 1161 1162 TEST_CASTABLE_TO_TYPE_RANGE(8); 1163 TEST_CASTABLE_TO_TYPE_RANGE(16); 1164 #if BITS_PER_LONG == 64 1165 TEST_CASTABLE_TO_TYPE_RANGE(32); 1166 #endif 1167 kunit_info(test, "%d castable_to_type() tests finished\n", count); 1168 1169 #undef TEST_CASTABLE_TO_TYPE_RANGE 1170 #undef TEST_CASTABLE_TO_TYPE_VAR 1171 #undef TEST_CASTABLE_TO_TYPE 1172 } 1173 1174 struct foo { 1175 int a; 1176 u32 counter; 1177 s16 array[] __counted_by(counter); 1178 }; 1179 1180 struct bar { 1181 int a; 1182 u32 counter; 1183 s16 array[]; 1184 }; 1185 1186 static void DEFINE_FLEX_test(struct kunit *test) 1187 { 1188 /* Using _RAW_ on a __counted_by struct will initialize "counter" to zero */ 1189 DEFINE_RAW_FLEX(struct foo, two_but_zero, array, 2); 1190 #if __has_attribute(__counted_by__) 1191 int expected_raw_size = sizeof(struct foo); 1192 #else 1193 int expected_raw_size = sizeof(struct foo) + 2 * sizeof(s16); 1194 #endif 1195 /* Without annotation, it will always be on-stack size. */ 1196 DEFINE_RAW_FLEX(struct bar, two, array, 2); 1197 DEFINE_FLEX(struct foo, eight, array, counter, 8); 1198 DEFINE_FLEX(struct foo, empty, array, counter, 0); 1199 1200 KUNIT_EXPECT_EQ(test, __struct_size(two_but_zero), expected_raw_size); 1201 KUNIT_EXPECT_EQ(test, __struct_size(two), sizeof(struct bar) + 2 * sizeof(s16)); 1202 KUNIT_EXPECT_EQ(test, __struct_size(eight), 24); 1203 KUNIT_EXPECT_EQ(test, __struct_size(empty), sizeof(struct foo)); 1204 } 1205 1206 static struct kunit_case overflow_test_cases[] = { 1207 KUNIT_CASE(u8_u8__u8_overflow_test), 1208 KUNIT_CASE(s8_s8__s8_overflow_test), 1209 KUNIT_CASE(u16_u16__u16_overflow_test), 1210 KUNIT_CASE(s16_s16__s16_overflow_test), 1211 KUNIT_CASE(u32_u32__u32_overflow_test), 1212 KUNIT_CASE(s32_s32__s32_overflow_test), 1213 KUNIT_CASE(u64_u64__u64_overflow_test), 1214 KUNIT_CASE(s64_s64__s64_overflow_test), 1215 KUNIT_CASE(u32_u32__int_overflow_test), 1216 KUNIT_CASE(u32_u32__u8_overflow_test), 1217 KUNIT_CASE(u8_u8__int_overflow_test), 1218 KUNIT_CASE(int_int__u8_overflow_test), 1219 KUNIT_CASE(shift_sane_test), 1220 KUNIT_CASE(shift_overflow_test), 1221 KUNIT_CASE(shift_truncate_test), 1222 KUNIT_CASE(shift_nonsense_test), 1223 KUNIT_CASE(overflow_allocation_test), 1224 KUNIT_CASE(overflow_size_helpers_test), 1225 KUNIT_CASE(overflows_type_test), 1226 KUNIT_CASE(same_type_test), 1227 KUNIT_CASE(castable_to_type_test), 1228 KUNIT_CASE(DEFINE_FLEX_test), 1229 {} 1230 }; 1231 1232 static struct kunit_suite overflow_test_suite = { 1233 .name = "overflow", 1234 .test_cases = overflow_test_cases, 1235 }; 1236 1237 kunit_test_suite(overflow_test_suite); 1238 1239 MODULE_DESCRIPTION("Test cases for arithmetic overflow checks"); 1240 MODULE_LICENSE("Dual MIT/GPL"); 1241