Hi Vitor, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.8-rc2] [cannot apply to next-20200625] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Vitor-Massaru-Iha/lib-overflow-test-add-KUnit-test-of-check_-_overflow-functions/20200618-221026 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1b5044021070efa3259f3e9548dc35d1eb6aa844 compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> cppcheck warnings: (new ones prefixed by >>) >> lib/overflow-test.c:334:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false); ^ lib/overflow-test.c:335:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false); ^ lib/overflow-test.c:336:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false); ^ lib/overflow-test.c:337:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false); ^ lib/overflow-test.c:351:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(0, 31, unsigned int, 0, false); ^ lib/overflow-test.c:365:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(1, 32, unsigned int, 0, true); ^ lib/overflow-test.c:383:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true); ^ lib/overflow-test.c:415:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true); ^ lib/overflow-test.c:426:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true); ^ lib/overflow-test.c:438:9: warning: Checking if unsigned variable '(unsigned int)-1' is less than zero. [unsignedLessThanZero] err |= TEST_ONE_SHIFT(0, -15, unsigned int, 0, true); ^ vim +334 lib/overflow-test.c d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 318 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 319 /* Sane shifts. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 320 err |= TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 321 err |= TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 322 err |= TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 323 err |= TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 324 err |= TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 325 err |= TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 326 err |= TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 327 err |= TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 328 err |= TEST_ONE_SHIFT(1, 0, int, 1 << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 329 err |= TEST_ONE_SHIFT(1, 16, int, 1 << 16, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 330 err |= TEST_ONE_SHIFT(1, 30, int, 1 << 30, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 331 err |= TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 332 err |= TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 333 err |= TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 @334 err |= TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 335 err |= TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 336 err |= TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 337 err |= TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 338 err |= TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 339 err |= TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 340 err |= TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 341 err |= TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 342 err |= TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 343 err |= TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 344 err |= TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 345 err |= TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64, d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 346 0xFFFFFFFFULL << 32, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 347 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 348 /* Sane shift: start and end with 0, without a too-wide shift. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 349 err |= TEST_ONE_SHIFT(0, 7, u8, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 350 err |= TEST_ONE_SHIFT(0, 15, u16, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 351 err |= TEST_ONE_SHIFT(0, 31, unsigned int, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 352 err |= TEST_ONE_SHIFT(0, 31, u32, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 353 err |= TEST_ONE_SHIFT(0, 63, u64, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 354 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 355 /* Sane shift: start and end with 0, without reaching signed bit. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 356 err |= TEST_ONE_SHIFT(0, 6, s8, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 357 err |= TEST_ONE_SHIFT(0, 14, s16, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 358 err |= TEST_ONE_SHIFT(0, 30, int, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 359 err |= TEST_ONE_SHIFT(0, 30, s32, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 360 err |= TEST_ONE_SHIFT(0, 62, s64, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 361 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 362 /* Overflow: shifted the bit off the end. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 363 err |= TEST_ONE_SHIFT(1, 8, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 364 err |= TEST_ONE_SHIFT(1, 16, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 365 err |= TEST_ONE_SHIFT(1, 32, unsigned int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 366 err |= TEST_ONE_SHIFT(1, 32, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 367 err |= TEST_ONE_SHIFT(1, 64, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 368 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 369 /* Overflow: shifted into the signed bit. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 370 err |= TEST_ONE_SHIFT(1, 7, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 371 err |= TEST_ONE_SHIFT(1, 15, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 372 err |= TEST_ONE_SHIFT(1, 31, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 373 err |= TEST_ONE_SHIFT(1, 31, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 374 err |= TEST_ONE_SHIFT(1, 63, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 375 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 376 /* Overflow: high bit falls off unsigned types. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 377 /* 10010110 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 378 err |= TEST_ONE_SHIFT(150, 1, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 379 /* 1000100010010110 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 380 err |= TEST_ONE_SHIFT(34966, 1, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 381 /* 10000100000010001000100010010110 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 382 err |= TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 383 err |= TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 384 /* 1000001000010000010000000100000010000100000010001000100010010110 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 385 err |= TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 386 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 387 /* Overflow: bit shifted into signed bit on signed types. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 388 /* 01001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 389 err |= TEST_ONE_SHIFT(75, 1, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 390 /* 0100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 391 err |= TEST_ONE_SHIFT(17483, 1, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 392 /* 01000010000001000100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 393 err |= TEST_ONE_SHIFT(1107575883, 1, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 394 err |= TEST_ONE_SHIFT(1107575883, 1, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 395 /* 0100000100001000001000000010000001000010000001000100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 396 err |= TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 397 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 398 /* Overflow: bit shifted past signed bit on signed types. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 399 /* 01001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 400 err |= TEST_ONE_SHIFT(75, 2, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 401 /* 0100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 402 err |= TEST_ONE_SHIFT(17483, 2, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 403 /* 01000010000001000100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 404 err |= TEST_ONE_SHIFT(1107575883, 2, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 405 err |= TEST_ONE_SHIFT(1107575883, 2, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 406 /* 0100000100001000001000000010000001000010000001000100010001001011 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 407 err |= TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 408 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 409 /* Overflow: values larger than destination type. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 410 err |= TEST_ONE_SHIFT(0x100, 0, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 411 err |= TEST_ONE_SHIFT(0xFF, 0, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 412 err |= TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 413 err |= TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 414 err |= TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 415 err |= TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 416 err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 417 err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 418 err |= TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 419 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 420 /* Nonsense: negative initial value. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 421 err |= TEST_ONE_SHIFT(-1, 0, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 422 err |= TEST_ONE_SHIFT(-1, 0, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 423 err |= TEST_ONE_SHIFT(-5, 0, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 424 err |= TEST_ONE_SHIFT(-5, 0, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 425 err |= TEST_ONE_SHIFT(-10, 0, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 426 err |= TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 427 err |= TEST_ONE_SHIFT(-100, 0, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 428 err |= TEST_ONE_SHIFT(-100, 0, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 429 err |= TEST_ONE_SHIFT(-10000, 0, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 430 err |= TEST_ONE_SHIFT(-10000, 0, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 431 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 432 /* Nonsense: negative shift values. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 433 err |= TEST_ONE_SHIFT(0, -5, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 434 err |= TEST_ONE_SHIFT(0, -5, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 435 err |= TEST_ONE_SHIFT(0, -10, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 436 err |= TEST_ONE_SHIFT(0, -10, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 437 err |= TEST_ONE_SHIFT(0, -15, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 438 err |= TEST_ONE_SHIFT(0, -15, unsigned int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 439 err |= TEST_ONE_SHIFT(0, -20, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 440 err |= TEST_ONE_SHIFT(0, -20, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 441 err |= TEST_ONE_SHIFT(0, -30, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 442 err |= TEST_ONE_SHIFT(0, -30, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 443 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 444 /* Overflow: shifted at or beyond entire type's bit width. */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 445 err |= TEST_ONE_SHIFT(0, 8, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 446 err |= TEST_ONE_SHIFT(0, 9, u8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 447 err |= TEST_ONE_SHIFT(0, 8, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 448 err |= TEST_ONE_SHIFT(0, 9, s8, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 449 err |= TEST_ONE_SHIFT(0, 16, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 450 err |= TEST_ONE_SHIFT(0, 17, u16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 451 err |= TEST_ONE_SHIFT(0, 16, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 452 err |= TEST_ONE_SHIFT(0, 17, s16, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 453 err |= TEST_ONE_SHIFT(0, 32, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 454 err |= TEST_ONE_SHIFT(0, 33, u32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 455 err |= TEST_ONE_SHIFT(0, 32, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 456 err |= TEST_ONE_SHIFT(0, 33, int, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 457 err |= TEST_ONE_SHIFT(0, 32, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 458 err |= TEST_ONE_SHIFT(0, 33, s32, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 459 err |= TEST_ONE_SHIFT(0, 64, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 460 err |= TEST_ONE_SHIFT(0, 65, u64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 461 err |= TEST_ONE_SHIFT(0, 64, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 462 err |= TEST_ONE_SHIFT(0, 65, s64, 0, true); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 463 d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 464 /* d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 465 * Corner case: for unsigned types, we fail when we've shifted d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 466 * through the entire width of bits. For signed types, we might d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 467 * want to match this behavior, but that would mean noticing if d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 468 * we shift through all but the signed bit, and this is not d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 469 * currently detected (but we'll notice an overflow into the d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 470 * signed bit). So, for now, we will test this condition but d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 471 * mark it as not expected to overflow. d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 472 */ d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 473 err |= TEST_ONE_SHIFT(0, 7, s8, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 474 err |= TEST_ONE_SHIFT(0, 15, s16, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 475 err |= TEST_ONE_SHIFT(0, 31, int, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 476 err |= TEST_ONE_SHIFT(0, 31, s32, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 477 err |= TEST_ONE_SHIFT(0, 63, s64, 0, false); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 478 f1362e9519c80f lib/overflow-test.c Vitor Massaru Iha 2020-06-18 479 KUNIT_EXPECT_FALSE(test, err); d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 480 } d36b6ad27c7b95 lib/test_overflow.c Kees Cook 2018-08-01 481 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
