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![Kees Cook](/assets/img/avatar_default.png)
Convert overflow unit tests to KUnit, for better integration into the kernel self test framework. Includes a rename of test_overflow.c to overflow_kunit.c, and CONFIG_TEST_OVERFLOW to CONFIG_OVERFLOW_KUNIT_TEST. $ ./tools/testing/kunit/kunit.py run overflow ... [14:33:51] Starting KUnit Kernel (1/1)... [14:33:51] ============================================================ [14:33:51] ================== overflow (11 subtests) ================== [14:33:51] [PASSED] u8_overflow_test [14:33:51] [PASSED] s8_overflow_test [14:33:51] [PASSED] u16_overflow_test [14:33:51] [PASSED] s16_overflow_test [14:33:51] [PASSED] u32_overflow_test [14:33:51] [PASSED] s32_overflow_test [14:33:51] [PASSED] u64_overflow_test [14:33:51] [PASSED] s64_overflow_test [14:33:51] [PASSED] overflow_shift_test [14:33:51] [PASSED] overflow_allocation_test [14:33:51] [PASSED] overflow_size_helpers_test [14:33:51] ==================== [PASSED] overflow ===================== [14:33:51] ============================================================ [14:33:51] Testing complete. Passed: 11, Failed: 0, Crashed: 0, Skipped: 0, Errors: 0 [14:33:51] Elapsed time: 12.525s total, 0.001s configuring, 12.402s building, 0.101s running Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Nick Desaulniers <ndesaulniers@google.com> Co-developed-by: Vitor Massaru Iha <vitor@massaru.org> Signed-off-by: Vitor Massaru Iha <vitor@massaru.org> Link: https://lore.kernel.org/lkml/20200720224418.200495-1-vitor@massaru.org/ Co-developed-by: Daniel Latypov <dlatypov@google.com> Signed-off-by: Daniel Latypov <dlatypov@google.com> Link: https://lore.kernel.org/linux-kselftest/20210503211536.1384578-1-dlatypov@google.com/ Acked-by: Nick Desaulniers <ndesaulniers@google.com> Link: https://lore.kernel.org/lkml/CAKwvOdm62iA1dNiC6Q11UJ-MnTqtc4kXkm-ubPaFMK824_k0nw@mail.gmail.com Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: David Gow <davidgow@google.com> Link: https://lore.kernel.org/lkml/CABVgOS=TWVh649_Vjo3wnMu9gZnq66gkV-LtGgsksAWMqc+MSA@mail.gmail.com
670 lines
25 KiB
C
670 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
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/*
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* Test cases for arithmetic overflow checks. See:
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* https://www.kernel.org/doc/html/latest/dev-tools/kunit/kunit-tool.html#configuring-building-and-running-tests
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* ./tools/testing/kunit/kunit.py run overflow [--raw_output]
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <kunit/test.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/overflow.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/vmalloc.h>
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#define DEFINE_TEST_ARRAY(t) \
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static const struct test_ ## t { \
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t a, b; \
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t sum, diff, prod; \
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bool s_of, d_of, p_of; \
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} t ## _tests[]
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DEFINE_TEST_ARRAY(u8) = {
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{0, 0, 0, 0, 0, false, false, false},
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{1, 1, 2, 0, 1, false, false, false},
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{0, 1, 1, U8_MAX, 0, false, true, false},
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{1, 0, 1, 1, 0, false, false, false},
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{0, U8_MAX, U8_MAX, 1, 0, false, true, false},
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{U8_MAX, 0, U8_MAX, U8_MAX, 0, false, false, false},
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{1, U8_MAX, 0, 2, U8_MAX, true, true, false},
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{U8_MAX, 1, 0, U8_MAX-1, U8_MAX, true, false, false},
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{U8_MAX, U8_MAX, U8_MAX-1, 0, 1, true, false, true},
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{U8_MAX, U8_MAX-1, U8_MAX-2, 1, 2, true, false, true},
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{U8_MAX-1, U8_MAX, U8_MAX-2, U8_MAX, 2, true, true, true},
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{1U << 3, 1U << 3, 1U << 4, 0, 1U << 6, false, false, false},
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{1U << 4, 1U << 4, 1U << 5, 0, 0, false, false, true},
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{1U << 4, 1U << 3, 3*(1U << 3), 1U << 3, 1U << 7, false, false, false},
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{1U << 7, 1U << 7, 0, 0, 0, true, false, true},
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{48, 32, 80, 16, 0, false, false, true},
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{128, 128, 0, 0, 0, true, false, true},
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{123, 234, 101, 145, 110, true, true, true},
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};
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DEFINE_TEST_ARRAY(u16) = {
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{0, 0, 0, 0, 0, false, false, false},
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{1, 1, 2, 0, 1, false, false, false},
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{0, 1, 1, U16_MAX, 0, false, true, false},
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{1, 0, 1, 1, 0, false, false, false},
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{0, U16_MAX, U16_MAX, 1, 0, false, true, false},
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{U16_MAX, 0, U16_MAX, U16_MAX, 0, false, false, false},
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{1, U16_MAX, 0, 2, U16_MAX, true, true, false},
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{U16_MAX, 1, 0, U16_MAX-1, U16_MAX, true, false, false},
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{U16_MAX, U16_MAX, U16_MAX-1, 0, 1, true, false, true},
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{U16_MAX, U16_MAX-1, U16_MAX-2, 1, 2, true, false, true},
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{U16_MAX-1, U16_MAX, U16_MAX-2, U16_MAX, 2, true, true, true},
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{1U << 7, 1U << 7, 1U << 8, 0, 1U << 14, false, false, false},
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{1U << 8, 1U << 8, 1U << 9, 0, 0, false, false, true},
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{1U << 8, 1U << 7, 3*(1U << 7), 1U << 7, 1U << 15, false, false, false},
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{1U << 15, 1U << 15, 0, 0, 0, true, false, true},
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{123, 234, 357, 65425, 28782, false, true, false},
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{1234, 2345, 3579, 64425, 10146, false, true, true},
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};
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DEFINE_TEST_ARRAY(u32) = {
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{0, 0, 0, 0, 0, false, false, false},
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{1, 1, 2, 0, 1, false, false, false},
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{0, 1, 1, U32_MAX, 0, false, true, false},
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{1, 0, 1, 1, 0, false, false, false},
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{0, U32_MAX, U32_MAX, 1, 0, false, true, false},
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{U32_MAX, 0, U32_MAX, U32_MAX, 0, false, false, false},
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{1, U32_MAX, 0, 2, U32_MAX, true, true, false},
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{U32_MAX, 1, 0, U32_MAX-1, U32_MAX, true, false, false},
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{U32_MAX, U32_MAX, U32_MAX-1, 0, 1, true, false, true},
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{U32_MAX, U32_MAX-1, U32_MAX-2, 1, 2, true, false, true},
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{U32_MAX-1, U32_MAX, U32_MAX-2, U32_MAX, 2, true, true, true},
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{1U << 15, 1U << 15, 1U << 16, 0, 1U << 30, false, false, false},
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{1U << 16, 1U << 16, 1U << 17, 0, 0, false, false, true},
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{1U << 16, 1U << 15, 3*(1U << 15), 1U << 15, 1U << 31, false, false, false},
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{1U << 31, 1U << 31, 0, 0, 0, true, false, true},
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{-2U, 1U, -1U, -3U, -2U, false, false, false},
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{-4U, 5U, 1U, -9U, -20U, true, false, true},
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};
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DEFINE_TEST_ARRAY(u64) = {
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{0, 0, 0, 0, 0, false, false, false},
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{1, 1, 2, 0, 1, false, false, false},
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{0, 1, 1, U64_MAX, 0, false, true, false},
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{1, 0, 1, 1, 0, false, false, false},
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{0, U64_MAX, U64_MAX, 1, 0, false, true, false},
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{U64_MAX, 0, U64_MAX, U64_MAX, 0, false, false, false},
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{1, U64_MAX, 0, 2, U64_MAX, true, true, false},
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{U64_MAX, 1, 0, U64_MAX-1, U64_MAX, true, false, false},
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{U64_MAX, U64_MAX, U64_MAX-1, 0, 1, true, false, true},
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{U64_MAX, U64_MAX-1, U64_MAX-2, 1, 2, true, false, true},
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{U64_MAX-1, U64_MAX, U64_MAX-2, U64_MAX, 2, true, true, true},
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{1ULL << 31, 1ULL << 31, 1ULL << 32, 0, 1ULL << 62, false, false, false},
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{1ULL << 32, 1ULL << 32, 1ULL << 33, 0, 0, false, false, true},
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{1ULL << 32, 1ULL << 31, 3*(1ULL << 31), 1ULL << 31, 1ULL << 63, false, false, false},
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{1ULL << 63, 1ULL << 63, 0, 0, 0, true, false, true},
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{1000000000ULL /* 10^9 */, 10000000000ULL /* 10^10 */,
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11000000000ULL, 18446744064709551616ULL, 10000000000000000000ULL,
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false, true, false},
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{-15ULL, 10ULL, -5ULL, -25ULL, -150ULL, false, false, true},
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};
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DEFINE_TEST_ARRAY(s8) = {
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{0, 0, 0, 0, 0, false, false, false},
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{0, S8_MAX, S8_MAX, -S8_MAX, 0, false, false, false},
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{S8_MAX, 0, S8_MAX, S8_MAX, 0, false, false, false},
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{0, S8_MIN, S8_MIN, S8_MIN, 0, false, true, false},
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{S8_MIN, 0, S8_MIN, S8_MIN, 0, false, false, false},
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{-1, S8_MIN, S8_MAX, S8_MAX, S8_MIN, true, false, true},
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{S8_MIN, -1, S8_MAX, -S8_MAX, S8_MIN, true, false, true},
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{-1, S8_MAX, S8_MAX-1, S8_MIN, -S8_MAX, false, false, false},
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{S8_MAX, -1, S8_MAX-1, S8_MIN, -S8_MAX, false, true, false},
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{-1, -S8_MAX, S8_MIN, S8_MAX-1, S8_MAX, false, false, false},
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{-S8_MAX, -1, S8_MIN, S8_MIN+2, S8_MAX, false, false, false},
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{1, S8_MIN, -S8_MAX, -S8_MAX, S8_MIN, false, true, false},
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{S8_MIN, 1, -S8_MAX, S8_MAX, S8_MIN, false, true, false},
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{1, S8_MAX, S8_MIN, S8_MIN+2, S8_MAX, true, false, false},
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{S8_MAX, 1, S8_MIN, S8_MAX-1, S8_MAX, true, false, false},
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{S8_MIN, S8_MIN, 0, 0, 0, true, false, true},
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{S8_MAX, S8_MAX, -2, 0, 1, true, false, true},
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{-4, -32, -36, 28, -128, false, false, true},
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{-4, 32, 28, -36, -128, false, false, false},
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};
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DEFINE_TEST_ARRAY(s16) = {
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{0, 0, 0, 0, 0, false, false, false},
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{0, S16_MAX, S16_MAX, -S16_MAX, 0, false, false, false},
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{S16_MAX, 0, S16_MAX, S16_MAX, 0, false, false, false},
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{0, S16_MIN, S16_MIN, S16_MIN, 0, false, true, false},
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{S16_MIN, 0, S16_MIN, S16_MIN, 0, false, false, false},
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{-1, S16_MIN, S16_MAX, S16_MAX, S16_MIN, true, false, true},
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{S16_MIN, -1, S16_MAX, -S16_MAX, S16_MIN, true, false, true},
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{-1, S16_MAX, S16_MAX-1, S16_MIN, -S16_MAX, false, false, false},
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{S16_MAX, -1, S16_MAX-1, S16_MIN, -S16_MAX, false, true, false},
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{-1, -S16_MAX, S16_MIN, S16_MAX-1, S16_MAX, false, false, false},
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{-S16_MAX, -1, S16_MIN, S16_MIN+2, S16_MAX, false, false, false},
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{1, S16_MIN, -S16_MAX, -S16_MAX, S16_MIN, false, true, false},
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{S16_MIN, 1, -S16_MAX, S16_MAX, S16_MIN, false, true, false},
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{1, S16_MAX, S16_MIN, S16_MIN+2, S16_MAX, true, false, false},
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{S16_MAX, 1, S16_MIN, S16_MAX-1, S16_MAX, true, false, false},
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{S16_MIN, S16_MIN, 0, 0, 0, true, false, true},
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{S16_MAX, S16_MAX, -2, 0, 1, true, false, true},
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};
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DEFINE_TEST_ARRAY(s32) = {
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{0, 0, 0, 0, 0, false, false, false},
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{0, S32_MAX, S32_MAX, -S32_MAX, 0, false, false, false},
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{S32_MAX, 0, S32_MAX, S32_MAX, 0, false, false, false},
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{0, S32_MIN, S32_MIN, S32_MIN, 0, false, true, false},
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{S32_MIN, 0, S32_MIN, S32_MIN, 0, false, false, false},
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{-1, S32_MIN, S32_MAX, S32_MAX, S32_MIN, true, false, true},
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{S32_MIN, -1, S32_MAX, -S32_MAX, S32_MIN, true, false, true},
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{-1, S32_MAX, S32_MAX-1, S32_MIN, -S32_MAX, false, false, false},
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{S32_MAX, -1, S32_MAX-1, S32_MIN, -S32_MAX, false, true, false},
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{-1, -S32_MAX, S32_MIN, S32_MAX-1, S32_MAX, false, false, false},
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{-S32_MAX, -1, S32_MIN, S32_MIN+2, S32_MAX, false, false, false},
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{1, S32_MIN, -S32_MAX, -S32_MAX, S32_MIN, false, true, false},
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{S32_MIN, 1, -S32_MAX, S32_MAX, S32_MIN, false, true, false},
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{1, S32_MAX, S32_MIN, S32_MIN+2, S32_MAX, true, false, false},
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{S32_MAX, 1, S32_MIN, S32_MAX-1, S32_MAX, true, false, false},
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{S32_MIN, S32_MIN, 0, 0, 0, true, false, true},
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{S32_MAX, S32_MAX, -2, 0, 1, true, false, true},
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};
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DEFINE_TEST_ARRAY(s64) = {
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{0, 0, 0, 0, 0, false, false, false},
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{0, S64_MAX, S64_MAX, -S64_MAX, 0, false, false, false},
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{S64_MAX, 0, S64_MAX, S64_MAX, 0, false, false, false},
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{0, S64_MIN, S64_MIN, S64_MIN, 0, false, true, false},
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{S64_MIN, 0, S64_MIN, S64_MIN, 0, false, false, false},
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{-1, S64_MIN, S64_MAX, S64_MAX, S64_MIN, true, false, true},
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{S64_MIN, -1, S64_MAX, -S64_MAX, S64_MIN, true, false, true},
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{-1, S64_MAX, S64_MAX-1, S64_MIN, -S64_MAX, false, false, false},
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{S64_MAX, -1, S64_MAX-1, S64_MIN, -S64_MAX, false, true, false},
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{-1, -S64_MAX, S64_MIN, S64_MAX-1, S64_MAX, false, false, false},
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{-S64_MAX, -1, S64_MIN, S64_MIN+2, S64_MAX, false, false, false},
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{1, S64_MIN, -S64_MAX, -S64_MAX, S64_MIN, false, true, false},
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{S64_MIN, 1, -S64_MAX, S64_MAX, S64_MIN, false, true, false},
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{1, S64_MAX, S64_MIN, S64_MIN+2, S64_MAX, true, false, false},
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{S64_MAX, 1, S64_MIN, S64_MAX-1, S64_MAX, true, false, false},
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{S64_MIN, S64_MIN, 0, 0, 0, true, false, true},
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{S64_MAX, S64_MAX, -2, 0, 1, true, false, true},
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{-1, -1, -2, 0, 1, false, false, false},
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{-1, -128, -129, 127, 128, false, false, false},
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{-128, -1, -129, -127, 128, false, false, false},
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{0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false},
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};
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#define check_one_op(t, fmt, op, sym, a, b, r, of) do { \
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t _r; \
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bool _of; \
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\
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_of = check_ ## op ## _overflow(a, b, &_r); \
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KUNIT_EXPECT_EQ_MSG(test, _of, of, \
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"expected "fmt" "sym" "fmt" to%s overflow (type %s)\n", \
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a, b, of ? "" : " not", #t); \
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KUNIT_EXPECT_EQ_MSG(test, _r, r, \
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"expected "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \
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a, b, r, _r, #t); \
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} while (0)
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#define DEFINE_TEST_FUNC(t, fmt) \
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static void do_test_ ## t(struct kunit *test, const struct test_ ## t *p) \
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{ \
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check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of); \
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check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of); \
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check_one_op(t, fmt, sub, "-", p->a, p->b, p->diff, p->d_of); \
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check_one_op(t, fmt, mul, "*", p->a, p->b, p->prod, p->p_of); \
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check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of); \
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} \
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\
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static void t ## _overflow_test(struct kunit *test) { \
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unsigned i; \
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\
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for (i = 0; i < ARRAY_SIZE(t ## _tests); ++i) \
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do_test_ ## t(test, &t ## _tests[i]); \
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kunit_info(test, "%zu %s arithmetic tests finished\n", \
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ARRAY_SIZE(t ## _tests), #t); \
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}
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DEFINE_TEST_FUNC(u8, "%d");
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DEFINE_TEST_FUNC(s8, "%d");
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DEFINE_TEST_FUNC(u16, "%d");
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DEFINE_TEST_FUNC(s16, "%d");
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DEFINE_TEST_FUNC(u32, "%u");
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DEFINE_TEST_FUNC(s32, "%d");
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#if BITS_PER_LONG == 64
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DEFINE_TEST_FUNC(u64, "%llu");
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DEFINE_TEST_FUNC(s64, "%lld");
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#endif
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static void overflow_shift_test(struct kunit *test)
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{
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int count = 0;
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/* Args are: value, shift, type, expected result, overflow expected */
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#define TEST_ONE_SHIFT(a, s, t, expect, of) do { \
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typeof(a) __a = (a); \
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typeof(s) __s = (s); \
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t __e = (expect); \
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t __d; \
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bool __of = check_shl_overflow(__a, __s, &__d); \
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if (__of != of) { \
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KUNIT_EXPECT_EQ_MSG(test, __of, of, \
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"expected (%s)(%s << %s) to%s overflow\n", \
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#t, #a, #s, of ? "" : " not"); \
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} else if (!__of && __d != __e) { \
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KUNIT_EXPECT_EQ_MSG(test, __d, __e, \
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"expected (%s)(%s << %s) == %s\n", \
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#t, #a, #s, #expect); \
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if ((t)-1 < 0) \
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kunit_info(test, "got %lld\n", (s64)__d); \
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else \
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kunit_info(test, "got %llu\n", (u64)__d); \
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} \
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count++; \
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} while (0)
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/* Sane shifts. */
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TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false);
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TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false);
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TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false);
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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);
|
|
|
|
/* 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);
|
|
|
|
/* 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);
|
|
|
|
/* Nonsense: negative initial value. */
|
|
TEST_ONE_SHIFT(-1, 0, s8, 0, true);
|
|
TEST_ONE_SHIFT(-1, 0, u8, 0, true);
|
|
TEST_ONE_SHIFT(-5, 0, s16, 0, true);
|
|
TEST_ONE_SHIFT(-5, 0, u16, 0, true);
|
|
TEST_ONE_SHIFT(-10, 0, int, 0, true);
|
|
TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true);
|
|
TEST_ONE_SHIFT(-100, 0, s32, 0, true);
|
|
TEST_ONE_SHIFT(-100, 0, u32, 0, true);
|
|
TEST_ONE_SHIFT(-10000, 0, s64, 0, true);
|
|
TEST_ONE_SHIFT(-10000, 0, u64, 0, true);
|
|
|
|
/* Nonsense: negative shift values. */
|
|
TEST_ONE_SHIFT(0, -5, s8, 0, true);
|
|
TEST_ONE_SHIFT(0, -5, u8, 0, true);
|
|
TEST_ONE_SHIFT(0, -10, s16, 0, true);
|
|
TEST_ONE_SHIFT(0, -10, u16, 0, true);
|
|
TEST_ONE_SHIFT(0, -15, int, 0, true);
|
|
TEST_ONE_SHIFT(0, -15, unsigned int, 0, true);
|
|
TEST_ONE_SHIFT(0, -20, s32, 0, true);
|
|
TEST_ONE_SHIFT(0, -20, u32, 0, true);
|
|
TEST_ONE_SHIFT(0, -30, s64, 0, true);
|
|
TEST_ONE_SHIFT(0, -30, u64, 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);
|
|
|
|
/*
|
|
* Corner case: for unsigned types, we fail when we've shifted
|
|
* through the entire width of bits. For signed types, we might
|
|
* want to match this behavior, but that would mean noticing if
|
|
* we shift through all but the signed bit, and this is not
|
|
* currently detected (but we'll notice an overflow into the
|
|
* signed bit). So, for now, we will test this condition but
|
|
* mark it as not expected to overflow.
|
|
*/
|
|
TEST_ONE_SHIFT(0, 7, s8, 0, false);
|
|
TEST_ONE_SHIFT(0, 15, s16, 0, false);
|
|
TEST_ONE_SHIFT(0, 31, int, 0, false);
|
|
TEST_ONE_SHIFT(0, 31, s32, 0, false);
|
|
TEST_ONE_SHIFT(0, 63, s64, 0, false);
|
|
|
|
kunit_info(test, "%d shift tests finished\n", count);
|
|
#undef TEST_ONE_SHIFT
|
|
}
|
|
|
|
/*
|
|
* Deal with the various forms of allocator arguments. See comments above
|
|
* the DEFINE_TEST_ALLOC() instances for mapping of the "bits".
|
|
*/
|
|
#define alloc_GFP (GFP_KERNEL | __GFP_NOWARN)
|
|
#define alloc010(alloc, arg, sz) alloc(sz, alloc_GFP)
|
|
#define alloc011(alloc, arg, sz) alloc(sz, alloc_GFP, NUMA_NO_NODE)
|
|
#define alloc000(alloc, arg, sz) alloc(sz)
|
|
#define alloc001(alloc, arg, sz) alloc(sz, NUMA_NO_NODE)
|
|
#define alloc110(alloc, arg, sz) alloc(arg, sz, alloc_GFP)
|
|
#define free0(free, arg, ptr) free(ptr)
|
|
#define free1(free, arg, ptr) free(arg, ptr)
|
|
|
|
/* Wrap around to 16K */
|
|
#define TEST_SIZE (5 * 4096)
|
|
|
|
#define DEFINE_TEST_ALLOC(func, free_func, want_arg, want_gfp, want_node)\
|
|
static void test_ ## func (struct kunit *test, void *arg) \
|
|
{ \
|
|
volatile size_t a = TEST_SIZE; \
|
|
volatile size_t b = (SIZE_MAX / TEST_SIZE) + 1; \
|
|
void *ptr; \
|
|
\
|
|
/* Tiny allocation test. */ \
|
|
ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, 1);\
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
|
|
#func " failed regular allocation?!\n"); \
|
|
free ## want_arg (free_func, arg, ptr); \
|
|
\
|
|
/* Wrapped allocation test. */ \
|
|
ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
|
|
a * b); \
|
|
KUNIT_ASSERT_NOT_ERR_OR_NULL_MSG(test, ptr, \
|
|
#func " unexpectedly failed bad wrapping?!\n"); \
|
|
free ## want_arg (free_func, arg, ptr); \
|
|
\
|
|
/* Saturated allocation test. */ \
|
|
ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
|
|
array_size(a, b)); \
|
|
if (ptr) { \
|
|
KUNIT_FAIL(test, #func " missed saturation!\n"); \
|
|
free ## want_arg (free_func, arg, ptr); \
|
|
} \
|
|
}
|
|
|
|
/*
|
|
* Allocator uses a trailing node argument --------+ (e.g. kmalloc_node())
|
|
* Allocator uses the gfp_t argument -----------+ | (e.g. kmalloc())
|
|
* Allocator uses a special leading argument + | | (e.g. devm_kmalloc())
|
|
* | | |
|
|
*/
|
|
DEFINE_TEST_ALLOC(kmalloc, kfree, 0, 1, 0);
|
|
DEFINE_TEST_ALLOC(kmalloc_node, kfree, 0, 1, 1);
|
|
DEFINE_TEST_ALLOC(kzalloc, kfree, 0, 1, 0);
|
|
DEFINE_TEST_ALLOC(kzalloc_node, kfree, 0, 1, 1);
|
|
DEFINE_TEST_ALLOC(__vmalloc, vfree, 0, 1, 0);
|
|
DEFINE_TEST_ALLOC(kvmalloc, kvfree, 0, 1, 0);
|
|
DEFINE_TEST_ALLOC(kvmalloc_node, kvfree, 0, 1, 1);
|
|
DEFINE_TEST_ALLOC(kvzalloc, kvfree, 0, 1, 0);
|
|
DEFINE_TEST_ALLOC(kvzalloc_node, kvfree, 0, 1, 1);
|
|
DEFINE_TEST_ALLOC(devm_kmalloc, devm_kfree, 1, 1, 0);
|
|
DEFINE_TEST_ALLOC(devm_kzalloc, devm_kfree, 1, 1, 0);
|
|
|
|
static void overflow_allocation_test(struct kunit *test)
|
|
{
|
|
const char device_name[] = "overflow-test";
|
|
struct device *dev;
|
|
int count = 0;
|
|
|
|
#define check_allocation_overflow(alloc) do { \
|
|
count++; \
|
|
test_ ## alloc(test, dev); \
|
|
} while (0)
|
|
|
|
/* Create dummy device for devm_kmalloc()-family tests. */
|
|
dev = root_device_register(device_name);
|
|
KUNIT_ASSERT_FALSE_MSG(test, IS_ERR(dev),
|
|
"Cannot register test device\n");
|
|
|
|
check_allocation_overflow(kmalloc);
|
|
check_allocation_overflow(kmalloc_node);
|
|
check_allocation_overflow(kzalloc);
|
|
check_allocation_overflow(kzalloc_node);
|
|
check_allocation_overflow(__vmalloc);
|
|
check_allocation_overflow(kvmalloc);
|
|
check_allocation_overflow(kvmalloc_node);
|
|
check_allocation_overflow(kvzalloc);
|
|
check_allocation_overflow(kvzalloc_node);
|
|
check_allocation_overflow(devm_kmalloc);
|
|
check_allocation_overflow(devm_kzalloc);
|
|
|
|
device_unregister(dev);
|
|
|
|
kunit_info(test, "%d allocation overflow tests finished\n", count);
|
|
#undef check_allocation_overflow
|
|
}
|
|
|
|
struct __test_flex_array {
|
|
unsigned long flags;
|
|
size_t count;
|
|
unsigned long data[];
|
|
};
|
|
|
|
static void overflow_size_helpers_test(struct kunit *test)
|
|
{
|
|
/* Make sure struct_size() can be used in a constant expression. */
|
|
u8 ce_array[struct_size((struct __test_flex_array *)0, data, 55)];
|
|
struct __test_flex_array *obj;
|
|
int count = 0;
|
|
int var;
|
|
volatile int unconst = 0;
|
|
|
|
/* Verify constant expression against runtime version. */
|
|
var = 55;
|
|
OPTIMIZER_HIDE_VAR(var);
|
|
KUNIT_EXPECT_EQ(test, sizeof(ce_array), struct_size(obj, data, var));
|
|
|
|
#define check_one_size_helper(expected, func, args...) do { \
|
|
size_t _r = func(args); \
|
|
KUNIT_EXPECT_EQ_MSG(test, _r, expected, \
|
|
"expected " #func "(" #args ") to return %zu but got %zu instead\n", \
|
|
(size_t)(expected), _r); \
|
|
count++; \
|
|
} while (0)
|
|
|
|
var = 4;
|
|
check_one_size_helper(20, size_mul, var++, 5);
|
|
check_one_size_helper(20, size_mul, 4, var++);
|
|
check_one_size_helper(0, size_mul, 0, 3);
|
|
check_one_size_helper(0, size_mul, 3, 0);
|
|
check_one_size_helper(6, size_mul, 2, 3);
|
|
check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 1);
|
|
check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 3);
|
|
check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, -3);
|
|
|
|
var = 4;
|
|
check_one_size_helper(9, size_add, var++, 5);
|
|
check_one_size_helper(9, size_add, 4, var++);
|
|
check_one_size_helper(9, size_add, 9, 0);
|
|
check_one_size_helper(9, size_add, 0, 9);
|
|
check_one_size_helper(5, size_add, 2, 3);
|
|
check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 1);
|
|
check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 3);
|
|
check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, -3);
|
|
|
|
var = 4;
|
|
check_one_size_helper(1, size_sub, var--, 3);
|
|
check_one_size_helper(1, size_sub, 4, var--);
|
|
check_one_size_helper(1, size_sub, 3, 2);
|
|
check_one_size_helper(9, size_sub, 9, 0);
|
|
check_one_size_helper(SIZE_MAX, size_sub, 9, -3);
|
|
check_one_size_helper(SIZE_MAX, size_sub, 0, 9);
|
|
check_one_size_helper(SIZE_MAX, size_sub, 2, 3);
|
|
check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 0);
|
|
check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 10);
|
|
check_one_size_helper(SIZE_MAX, size_sub, 0, SIZE_MAX);
|
|
check_one_size_helper(SIZE_MAX, size_sub, 14, SIZE_MAX);
|
|
check_one_size_helper(SIZE_MAX - 2, size_sub, SIZE_MAX - 1, 1);
|
|
check_one_size_helper(SIZE_MAX - 4, size_sub, SIZE_MAX - 1, 3);
|
|
check_one_size_helper(1, size_sub, SIZE_MAX - 1, -3);
|
|
|
|
var = 4;
|
|
check_one_size_helper(4 * sizeof(*obj->data),
|
|
flex_array_size, obj, data, var++);
|
|
check_one_size_helper(5 * sizeof(*obj->data),
|
|
flex_array_size, obj, data, var++);
|
|
check_one_size_helper(0, flex_array_size, obj, data, 0 + unconst);
|
|
check_one_size_helper(sizeof(*obj->data),
|
|
flex_array_size, obj, data, 1 + unconst);
|
|
check_one_size_helper(7 * sizeof(*obj->data),
|
|
flex_array_size, obj, data, 7 + unconst);
|
|
check_one_size_helper(SIZE_MAX,
|
|
flex_array_size, obj, data, -1 + unconst);
|
|
check_one_size_helper(SIZE_MAX,
|
|
flex_array_size, obj, data, SIZE_MAX - 4 + unconst);
|
|
|
|
var = 4;
|
|
check_one_size_helper(sizeof(*obj) + (4 * sizeof(*obj->data)),
|
|
struct_size, obj, data, var++);
|
|
check_one_size_helper(sizeof(*obj) + (5 * sizeof(*obj->data)),
|
|
struct_size, obj, data, var++);
|
|
check_one_size_helper(sizeof(*obj), struct_size, obj, data, 0 + unconst);
|
|
check_one_size_helper(sizeof(*obj) + sizeof(*obj->data),
|
|
struct_size, obj, data, 1 + unconst);
|
|
check_one_size_helper(SIZE_MAX,
|
|
struct_size, obj, data, -3 + unconst);
|
|
check_one_size_helper(SIZE_MAX,
|
|
struct_size, obj, data, SIZE_MAX - 3 + unconst);
|
|
|
|
kunit_info(test, "%d overflow size helper tests finished\n", count);
|
|
#undef check_one_size_helper
|
|
}
|
|
|
|
static struct kunit_case overflow_test_cases[] = {
|
|
KUNIT_CASE(u8_overflow_test),
|
|
KUNIT_CASE(s8_overflow_test),
|
|
KUNIT_CASE(u16_overflow_test),
|
|
KUNIT_CASE(s16_overflow_test),
|
|
KUNIT_CASE(u32_overflow_test),
|
|
KUNIT_CASE(s32_overflow_test),
|
|
#if BITS_PER_LONG == 64
|
|
KUNIT_CASE(u64_overflow_test),
|
|
KUNIT_CASE(s64_overflow_test),
|
|
#endif
|
|
KUNIT_CASE(overflow_shift_test),
|
|
KUNIT_CASE(overflow_allocation_test),
|
|
KUNIT_CASE(overflow_size_helpers_test),
|
|
{}
|
|
};
|
|
|
|
static struct kunit_suite overflow_test_suite = {
|
|
.name = "overflow",
|
|
.test_cases = overflow_test_cases,
|
|
};
|
|
|
|
kunit_test_suite(overflow_test_suite);
|
|
|
|
MODULE_LICENSE("Dual MIT/GPL");
|