| 1 | // SPDX-License-Identifier: GPL-2.0 OR MIT |
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| 2 | /* |
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| 3 | * Test cases for arithmetic overflow checks. See: |
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| 4 | * "Running tests with kunit_tool" at Documentation/dev-tools/kunit/start.rst |
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| 5 | * ./tools/testing/kunit/kunit.py run overflow [--raw_output] |
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| 6 | */ |
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| 7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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| 8 | |
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| 9 | #include <kunit/device.h> |
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| 10 | #include <kunit/test.h> |
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| 11 | #include <linux/device.h> |
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| 12 | #include <linux/kernel.h> |
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| 13 | #include <linux/mm.h> |
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| 14 | #include <linux/module.h> |
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| 15 | #include <linux/overflow.h> |
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| 16 | #include <linux/slab.h> |
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| 17 | #include <linux/types.h> |
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| 18 | #include <linux/vmalloc.h> |
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| 19 | |
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| 20 | #define SKIP(cond, reason) do { \ |
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| 21 | if (cond) { \ |
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| 22 | kunit_skip(test, reason); \ |
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| 23 | return; \ |
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| 24 | } \ |
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| 25 | } while (0) |
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| 26 | |
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| 27 | /* |
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| 28 | * Clang 11 and earlier generate unwanted libcalls for signed output |
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| 29 | * on unsigned input. |
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| 30 | */ |
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| 31 | #if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 11 |
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| 32 | # define SKIP_SIGN_MISMATCH(t) SKIP(t, "Clang 11 unwanted libcalls") |
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| 33 | #else |
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| 34 | # define SKIP_SIGN_MISMATCH(t) do { } while (0) |
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| 35 | #endif |
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| 36 | |
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| 37 | /* |
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| 38 | * Clang 13 and earlier generate unwanted libcalls for 64-bit tests on |
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| 39 | * 32-bit hosts. |
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| 40 | */ |
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| 41 | #if defined(CONFIG_CC_IS_CLANG) && __clang_major__ <= 13 && \ |
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| 42 | BITS_PER_LONG != 64 |
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| 43 | # define SKIP_64_ON_32(t) SKIP(t, "Clang 13 unwanted libcalls") |
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| 44 | #else |
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| 45 | # define SKIP_64_ON_32(t) do { } while (0) |
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| 46 | #endif |
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| 47 | |
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| 48 | #define DEFINE_TEST_ARRAY_TYPED(t1, t2, t) \ |
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| 49 | static const struct test_ ## t1 ## _ ## t2 ## __ ## t { \ |
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| 50 | t1 a; \ |
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| 51 | t2 b; \ |
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| 52 | t sum, diff, prod; \ |
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| 53 | bool s_of, d_of, p_of; \ |
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| 54 | } t1 ## _ ## t2 ## __ ## t ## _tests[] |
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| 55 | |
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| 56 | #define DEFINE_TEST_ARRAY(t) DEFINE_TEST_ARRAY_TYPED(t, t, t) |
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| 57 | |
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| 58 | DEFINE_TEST_ARRAY(u8) = { |
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| 59 | {0, 0, 0, 0, 0, false, false, false}, |
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| 60 | {1, 1, 2, 0, 1, false, false, false}, |
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| 61 | {0, 1, 1, U8_MAX, 0, false, true, false}, |
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| 62 | {1, 0, 1, 1, 0, false, false, false}, |
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| 63 | {0, U8_MAX, U8_MAX, 1, 0, false, true, false}, |
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| 64 | {U8_MAX, 0, U8_MAX, U8_MAX, 0, false, false, false}, |
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| 65 | {1, U8_MAX, 0, 2, U8_MAX, true, true, false}, |
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| 66 | {U8_MAX, 1, 0, U8_MAX-1, U8_MAX, true, false, false}, |
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| 67 | {U8_MAX, U8_MAX, U8_MAX-1, 0, 1, true, false, true}, |
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| 68 | |
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| 69 | {U8_MAX, U8_MAX-1, U8_MAX-2, 1, 2, true, false, true}, |
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| 70 | {U8_MAX-1, U8_MAX, U8_MAX-2, U8_MAX, 2, true, true, true}, |
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| 71 | |
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| 72 | {1U << 3, 1U << 3, 1U << 4, 0, 1U << 6, false, false, false}, |
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| 73 | {1U << 4, 1U << 4, 1U << 5, 0, 0, false, false, true}, |
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| 74 | {1U << 4, 1U << 3, 3*(1U << 3), 1U << 3, 1U << 7, false, false, false}, |
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| 75 | {1U << 7, 1U << 7, 0, 0, 0, true, false, true}, |
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| 76 | |
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| 77 | {48, 32, 80, 16, 0, false, false, true}, |
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| 78 | {128, 128, 0, 0, 0, true, false, true}, |
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| 79 | {123, 234, 101, 145, 110, true, true, true}, |
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| 80 | }; |
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| 81 | DEFINE_TEST_ARRAY(u16) = { |
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| 82 | {0, 0, 0, 0, 0, false, false, false}, |
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| 83 | {1, 1, 2, 0, 1, false, false, false}, |
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| 84 | {0, 1, 1, U16_MAX, 0, false, true, false}, |
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| 85 | {1, 0, 1, 1, 0, false, false, false}, |
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| 86 | {0, U16_MAX, U16_MAX, 1, 0, false, true, false}, |
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| 87 | {U16_MAX, 0, U16_MAX, U16_MAX, 0, false, false, false}, |
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| 88 | {1, U16_MAX, 0, 2, U16_MAX, true, true, false}, |
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| 89 | {U16_MAX, 1, 0, U16_MAX-1, U16_MAX, true, false, false}, |
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| 90 | {U16_MAX, U16_MAX, U16_MAX-1, 0, 1, true, false, true}, |
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| 91 | |
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| 92 | {U16_MAX, U16_MAX-1, U16_MAX-2, 1, 2, true, false, true}, |
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| 93 | {U16_MAX-1, U16_MAX, U16_MAX-2, U16_MAX, 2, true, true, true}, |
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| 94 | |
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| 95 | {1U << 7, 1U << 7, 1U << 8, 0, 1U << 14, false, false, false}, |
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| 96 | {1U << 8, 1U << 8, 1U << 9, 0, 0, false, false, true}, |
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| 97 | {1U << 8, 1U << 7, 3*(1U << 7), 1U << 7, 1U << 15, false, false, false}, |
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| 98 | {1U << 15, 1U << 15, 0, 0, 0, true, false, true}, |
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| 99 | |
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| 100 | {123, 234, 357, 65425, 28782, false, true, false}, |
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| 101 | {1234, 2345, 3579, 64425, 10146, false, true, true}, |
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| 102 | }; |
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| 103 | DEFINE_TEST_ARRAY(u32) = { |
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| 104 | {0, 0, 0, 0, 0, false, false, false}, |
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| 105 | {1, 1, 2, 0, 1, false, false, false}, |
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| 106 | {0, 1, 1, U32_MAX, 0, false, true, false}, |
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| 107 | {1, 0, 1, 1, 0, false, false, false}, |
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| 108 | {0, U32_MAX, U32_MAX, 1, 0, false, true, false}, |
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| 109 | {U32_MAX, 0, U32_MAX, U32_MAX, 0, false, false, false}, |
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| 110 | {1, U32_MAX, 0, 2, U32_MAX, true, true, false}, |
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| 111 | {U32_MAX, 1, 0, U32_MAX-1, U32_MAX, true, false, false}, |
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| 112 | {U32_MAX, U32_MAX, U32_MAX-1, 0, 1, true, false, true}, |
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| 113 | |
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| 114 | {U32_MAX, U32_MAX-1, U32_MAX-2, 1, 2, true, false, true}, |
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| 115 | {U32_MAX-1, U32_MAX, U32_MAX-2, U32_MAX, 2, true, true, true}, |
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| 116 | |
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| 117 | {1U << 15, 1U << 15, 1U << 16, 0, 1U << 30, false, false, false}, |
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| 118 | {1U << 16, 1U << 16, 1U << 17, 0, 0, false, false, true}, |
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| 119 | {1U << 16, 1U << 15, 3*(1U << 15), 1U << 15, 1U << 31, false, false, false}, |
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| 120 | {1U << 31, 1U << 31, 0, 0, 0, true, false, true}, |
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| 121 | |
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| 122 | {-2U, 1U, -1U, -3U, -2U, false, false, false}, |
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| 123 | {-4U, 5U, 1U, -9U, -20U, true, false, true}, |
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| 124 | }; |
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| 125 | |
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| 126 | DEFINE_TEST_ARRAY(u64) = { |
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| 127 | {0, 0, 0, 0, 0, false, false, false}, |
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| 128 | {1, 1, 2, 0, 1, false, false, false}, |
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| 129 | {0, 1, 1, U64_MAX, 0, false, true, false}, |
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| 130 | {1, 0, 1, 1, 0, false, false, false}, |
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| 131 | {0, U64_MAX, U64_MAX, 1, 0, false, true, false}, |
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| 132 | {U64_MAX, 0, U64_MAX, U64_MAX, 0, false, false, false}, |
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| 133 | {1, U64_MAX, 0, 2, U64_MAX, true, true, false}, |
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| 134 | {U64_MAX, 1, 0, U64_MAX-1, U64_MAX, true, false, false}, |
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| 135 | {U64_MAX, U64_MAX, U64_MAX-1, 0, 1, true, false, true}, |
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| 136 | |
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| 137 | {U64_MAX, U64_MAX-1, U64_MAX-2, 1, 2, true, false, true}, |
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| 138 | {U64_MAX-1, U64_MAX, U64_MAX-2, U64_MAX, 2, true, true, true}, |
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| 139 | |
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| 140 | {1ULL << 31, 1ULL << 31, 1ULL << 32, 0, 1ULL << 62, false, false, false}, |
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| 141 | {1ULL << 32, 1ULL << 32, 1ULL << 33, 0, 0, false, false, true}, |
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| 142 | {1ULL << 32, 1ULL << 31, 3*(1ULL << 31), 1ULL << 31, 1ULL << 63, false, false, false}, |
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| 143 | {1ULL << 63, 1ULL << 63, 0, 0, 0, true, false, true}, |
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| 144 | {1000000000ULL /* 10^9 */, 10000000000ULL /* 10^10 */, |
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| 145 | 11000000000ULL, 18446744064709551616ULL, 10000000000000000000ULL, |
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| 146 | false, true, false}, |
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| 147 | {-15ULL, 10ULL, -5ULL, -25ULL, -150ULL, false, false, true}, |
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| 148 | }; |
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| 149 | |
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| 150 | DEFINE_TEST_ARRAY(s8) = { |
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| 151 | {0, 0, 0, 0, 0, false, false, false}, |
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| 152 | |
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| 153 | {0, S8_MAX, S8_MAX, -S8_MAX, 0, false, false, false}, |
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| 154 | {S8_MAX, 0, S8_MAX, S8_MAX, 0, false, false, false}, |
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| 155 | {0, S8_MIN, S8_MIN, S8_MIN, 0, false, true, false}, |
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| 156 | {S8_MIN, 0, S8_MIN, S8_MIN, 0, false, false, false}, |
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| 157 | |
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| 158 | {-1, S8_MIN, S8_MAX, S8_MAX, S8_MIN, true, false, true}, |
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| 159 | {S8_MIN, -1, S8_MAX, -S8_MAX, S8_MIN, true, false, true}, |
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| 160 | {-1, S8_MAX, S8_MAX-1, S8_MIN, -S8_MAX, false, false, false}, |
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| 161 | {S8_MAX, -1, S8_MAX-1, S8_MIN, -S8_MAX, false, true, false}, |
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| 162 | {-1, -S8_MAX, S8_MIN, S8_MAX-1, S8_MAX, false, false, false}, |
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| 163 | {-S8_MAX, -1, S8_MIN, S8_MIN+2, S8_MAX, false, false, false}, |
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| 164 | |
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| 165 | {1, S8_MIN, -S8_MAX, -S8_MAX, S8_MIN, false, true, false}, |
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| 166 | {S8_MIN, 1, -S8_MAX, S8_MAX, S8_MIN, false, true, false}, |
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| 167 | {1, S8_MAX, S8_MIN, S8_MIN+2, S8_MAX, true, false, false}, |
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| 168 | {S8_MAX, 1, S8_MIN, S8_MAX-1, S8_MAX, true, false, false}, |
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| 169 | |
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| 170 | {S8_MIN, S8_MIN, 0, 0, 0, true, false, true}, |
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| 171 | {S8_MAX, S8_MAX, -2, 0, 1, true, false, true}, |
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| 172 | |
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| 173 | {-4, -32, -36, 28, -128, false, false, true}, |
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| 174 | {-4, 32, 28, -36, -128, false, false, false}, |
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| 175 | }; |
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| 176 | |
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| 177 | DEFINE_TEST_ARRAY(s16) = { |
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| 178 | {0, 0, 0, 0, 0, false, false, false}, |
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| 179 | |
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| 180 | {0, S16_MAX, S16_MAX, -S16_MAX, 0, false, false, false}, |
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| 181 | {S16_MAX, 0, S16_MAX, S16_MAX, 0, false, false, false}, |
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| 182 | {0, S16_MIN, S16_MIN, S16_MIN, 0, false, true, false}, |
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| 183 | {S16_MIN, 0, S16_MIN, S16_MIN, 0, false, false, false}, |
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| 184 | |
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| 185 | {-1, S16_MIN, S16_MAX, S16_MAX, S16_MIN, true, false, true}, |
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| 186 | {S16_MIN, -1, S16_MAX, -S16_MAX, S16_MIN, true, false, true}, |
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| 187 | {-1, S16_MAX, S16_MAX-1, S16_MIN, -S16_MAX, false, false, false}, |
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| 188 | {S16_MAX, -1, S16_MAX-1, S16_MIN, -S16_MAX, false, true, false}, |
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| 189 | {-1, -S16_MAX, S16_MIN, S16_MAX-1, S16_MAX, false, false, false}, |
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| 190 | {-S16_MAX, -1, S16_MIN, S16_MIN+2, S16_MAX, false, false, false}, |
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| 191 | |
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| 192 | {1, S16_MIN, -S16_MAX, -S16_MAX, S16_MIN, false, true, false}, |
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| 193 | {S16_MIN, 1, -S16_MAX, S16_MAX, S16_MIN, false, true, false}, |
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| 194 | {1, S16_MAX, S16_MIN, S16_MIN+2, S16_MAX, true, false, false}, |
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| 195 | {S16_MAX, 1, S16_MIN, S16_MAX-1, S16_MAX, true, false, false}, |
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| 196 | |
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| 197 | {S16_MIN, S16_MIN, 0, 0, 0, true, false, true}, |
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| 198 | {S16_MAX, S16_MAX, -2, 0, 1, true, false, true}, |
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| 199 | }; |
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| 200 | DEFINE_TEST_ARRAY(s32) = { |
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| 201 | {0, 0, 0, 0, 0, false, false, false}, |
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| 202 | |
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| 203 | {0, S32_MAX, S32_MAX, -S32_MAX, 0, false, false, false}, |
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| 204 | {S32_MAX, 0, S32_MAX, S32_MAX, 0, false, false, false}, |
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| 205 | {0, S32_MIN, S32_MIN, S32_MIN, 0, false, true, false}, |
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| 206 | {S32_MIN, 0, S32_MIN, S32_MIN, 0, false, false, false}, |
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| 207 | |
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| 208 | {-1, S32_MIN, S32_MAX, S32_MAX, S32_MIN, true, false, true}, |
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| 209 | {S32_MIN, -1, S32_MAX, -S32_MAX, S32_MIN, true, false, true}, |
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| 210 | {-1, S32_MAX, S32_MAX-1, S32_MIN, -S32_MAX, false, false, false}, |
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| 211 | {S32_MAX, -1, S32_MAX-1, S32_MIN, -S32_MAX, false, true, false}, |
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| 212 | {-1, -S32_MAX, S32_MIN, S32_MAX-1, S32_MAX, false, false, false}, |
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| 213 | {-S32_MAX, -1, S32_MIN, S32_MIN+2, S32_MAX, false, false, false}, |
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| 214 | |
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| 215 | {1, S32_MIN, -S32_MAX, -S32_MAX, S32_MIN, false, true, false}, |
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| 216 | {S32_MIN, 1, -S32_MAX, S32_MAX, S32_MIN, false, true, false}, |
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| 217 | {1, S32_MAX, S32_MIN, S32_MIN+2, S32_MAX, true, false, false}, |
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| 218 | {S32_MAX, 1, S32_MIN, S32_MAX-1, S32_MAX, true, false, false}, |
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| 219 | |
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| 220 | {S32_MIN, S32_MIN, 0, 0, 0, true, false, true}, |
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| 221 | {S32_MAX, S32_MAX, -2, 0, 1, true, false, true}, |
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| 222 | }; |
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| 223 | |
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| 224 | DEFINE_TEST_ARRAY(s64) = { |
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| 225 | {0, 0, 0, 0, 0, false, false, false}, |
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| 226 | |
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| 227 | {0, S64_MAX, S64_MAX, -S64_MAX, 0, false, false, false}, |
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| 228 | {S64_MAX, 0, S64_MAX, S64_MAX, 0, false, false, false}, |
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| 229 | {0, S64_MIN, S64_MIN, S64_MIN, 0, false, true, false}, |
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| 230 | {S64_MIN, 0, S64_MIN, S64_MIN, 0, false, false, false}, |
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| 231 | |
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| 232 | {-1, S64_MIN, S64_MAX, S64_MAX, S64_MIN, true, false, true}, |
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| 233 | {S64_MIN, -1, S64_MAX, -S64_MAX, S64_MIN, true, false, true}, |
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| 234 | {-1, S64_MAX, S64_MAX-1, S64_MIN, -S64_MAX, false, false, false}, |
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| 235 | {S64_MAX, -1, S64_MAX-1, S64_MIN, -S64_MAX, false, true, false}, |
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| 236 | {-1, -S64_MAX, S64_MIN, S64_MAX-1, S64_MAX, false, false, false}, |
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| 237 | {-S64_MAX, -1, S64_MIN, S64_MIN+2, S64_MAX, false, false, false}, |
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| 238 | |
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| 239 | {1, S64_MIN, -S64_MAX, -S64_MAX, S64_MIN, false, true, false}, |
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| 240 | {S64_MIN, 1, -S64_MAX, S64_MAX, S64_MIN, false, true, false}, |
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| 241 | {1, S64_MAX, S64_MIN, S64_MIN+2, S64_MAX, true, false, false}, |
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| 242 | {S64_MAX, 1, S64_MIN, S64_MAX-1, S64_MAX, true, false, false}, |
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| 243 | |
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| 244 | {S64_MIN, S64_MIN, 0, 0, 0, true, false, true}, |
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| 245 | {S64_MAX, S64_MAX, -2, 0, 1, true, false, true}, |
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| 246 | |
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| 247 | {-1, -1, -2, 0, 1, false, false, false}, |
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| 248 | {-1, -128, -129, 127, 128, false, false, false}, |
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| 249 | {-128, -1, -129, -127, 128, false, false, false}, |
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| 250 | {0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false}, |
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| 251 | }; |
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| 252 | |
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| 253 | #define check_one_op(t, fmt, op, sym, a, b, r, of) do { \ |
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| 254 | int _a_orig = a, _a_bump = a + 1; \ |
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| 255 | int _b_orig = b, _b_bump = b + 1; \ |
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| 256 | bool _of; \ |
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| 257 | t _r; \ |
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| 258 | \ |
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| 259 | _of = check_ ## op ## _overflow(a, b, &_r); \ |
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| 260 | KUNIT_EXPECT_EQ_MSG(test, _of, of, \ |
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| 261 | "expected check "fmt" "sym" "fmt" to%s overflow (type %s)\n", \ |
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| 262 | a, b, of ? "" : " not", #t); \ |
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| 263 | KUNIT_EXPECT_EQ_MSG(test, _r, r, \ |
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| 264 | "expected check "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \ |
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| 265 | a, b, r, _r, #t); \ |
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| 266 | /* Check for internal macro side-effects. */ \ |
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| 267 | _of = check_ ## op ## _overflow(_a_orig++, _b_orig++, &_r); \ |
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| 268 | KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, \ |
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| 269 | "Unexpected check " #op " macro side-effect!\n"); \ |
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| 270 | KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, \ |
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| 271 | "Unexpected check " #op " macro side-effect!\n"); \ |
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| 272 | \ |
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| 273 | _r = wrapping_ ## op(t, a, b); \ |
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| 274 | KUNIT_EXPECT_TRUE_MSG(test, _r == r, \ |
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| 275 | "expected wrap "fmt" "sym" "fmt" == "fmt", got "fmt" (type %s)\n", \ |
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| 276 | a, b, r, _r, #t); \ |
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| 277 | /* Check for internal macro side-effects. */ \ |
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| 278 | _a_orig = a; \ |
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| 279 | _b_orig = b; \ |
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| 280 | _r = wrapping_ ## op(t, _a_orig++, _b_orig++); \ |
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| 281 | KUNIT_EXPECT_EQ_MSG(test, _a_orig, _a_bump, \ |
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| 282 | "Unexpected wrap " #op " macro side-effect!\n"); \ |
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| 283 | KUNIT_EXPECT_EQ_MSG(test, _b_orig, _b_bump, \ |
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| 284 | "Unexpected wrap " #op " macro side-effect!\n"); \ |
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| 285 | } while (0) |
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| 286 | |
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| 287 | static int global_counter; |
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| 288 | static void bump_counter(void) |
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| 289 | { |
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| 290 | global_counter++; |
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| 291 | } |
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| 292 | |
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| 293 | static int get_index(void) |
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| 294 | { |
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| 295 | volatile int index = 0; |
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| 296 | bump_counter(); |
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| 297 | return index; |
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| 298 | } |
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| 299 | |
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| 300 | #define check_self_op(fmt, op, sym, a, b) do { \ |
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| 301 | typeof(a + 0) _a = a; \ |
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| 302 | typeof(b + 0) _b = b; \ |
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| 303 | typeof(a + 0) _a_sym = a; \ |
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| 304 | typeof(a + 0) _a_orig[1] = { a }; \ |
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| 305 | typeof(b + 0) _b_orig = b; \ |
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| 306 | typeof(b + 0) _b_bump = b + 1; \ |
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| 307 | typeof(a + 0) _r; \ |
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| 308 | \ |
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| 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 | const char device_name[] = "overflow-test" ; |
|---|
| 672 | struct device *dev; |
|---|
| 673 | int count = 0; |
|---|
| 674 | |
|---|
| 675 | #define check_allocation_overflow(alloc) do { \ |
|---|
| 676 | count++; \ |
|---|
| 677 | test_ ## alloc(test, dev); \ |
|---|
| 678 | } while (0) |
|---|
| 679 | |
|---|
| 680 | /* Create dummy device for devm_kmalloc()-family tests. */ |
|---|
| 681 | dev = kunit_device_register(test, name: device_name); |
|---|
| 682 | KUNIT_ASSERT_FALSE_MSG(test, IS_ERR(dev), |
|---|
| 683 | "Cannot register test device\n" ); |
|---|
| 684 | |
|---|
| 685 | check_allocation_overflow(kmalloc); |
|---|
| 686 | check_allocation_overflow(kmalloc_node); |
|---|
| 687 | check_allocation_overflow(kzalloc); |
|---|
| 688 | check_allocation_overflow(kzalloc_node); |
|---|
| 689 | check_allocation_overflow(__vmalloc); |
|---|
| 690 | check_allocation_overflow(kvmalloc); |
|---|
| 691 | check_allocation_overflow(kvmalloc_node); |
|---|
| 692 | check_allocation_overflow(kvzalloc); |
|---|
| 693 | check_allocation_overflow(kvzalloc_node); |
|---|
| 694 | check_allocation_overflow(devm_kmalloc); |
|---|
| 695 | check_allocation_overflow(devm_kzalloc); |
|---|
| 696 | |
|---|
| 697 | kunit_info(test, "%d allocation overflow tests finished\n" , count); |
|---|
| 698 | #undef check_allocation_overflow |
|---|
| 699 | } |
|---|
| 700 | |
|---|
| 701 | struct __test_flex_array { |
|---|
| 702 | unsigned long flags; |
|---|
| 703 | size_t count; |
|---|
| 704 | unsigned long data[]; |
|---|
| 705 | }; |
|---|
| 706 | |
|---|
| 707 | static void overflow_size_helpers_test(struct kunit *test) |
|---|
| 708 | { |
|---|
| 709 | /* Make sure struct_size() can be used in a constant expression. */ |
|---|
| 710 | u8 ce_array[struct_size_t(struct __test_flex_array, data, 55)]; |
|---|
| 711 | struct __test_flex_array *obj; |
|---|
| 712 | int count = 0; |
|---|
| 713 | int var; |
|---|
| 714 | volatile int unconst = 0; |
|---|
| 715 | |
|---|
| 716 | /* Verify constant expression against runtime version. */ |
|---|
| 717 | var = 55; |
|---|
| 718 | OPTIMIZER_HIDE_VAR(var); |
|---|
| 719 | KUNIT_EXPECT_EQ(test, sizeof(ce_array), struct_size(obj, data, var)); |
|---|
| 720 | |
|---|
| 721 | #define check_one_size_helper(expected, func, args...) do { \ |
|---|
| 722 | size_t _r = func(args); \ |
|---|
| 723 | KUNIT_EXPECT_EQ_MSG(test, _r, expected, \ |
|---|
| 724 | "expected " #func "(" #args ") to return %zu but got %zu instead\n", \ |
|---|
| 725 | (size_t)(expected), _r); \ |
|---|
| 726 | count++; \ |
|---|
| 727 | } while (0) |
|---|
| 728 | |
|---|
| 729 | var = 4; |
|---|
| 730 | check_one_size_helper(20, size_mul, var++, 5); |
|---|
| 731 | check_one_size_helper(20, size_mul, 4, var++); |
|---|
| 732 | check_one_size_helper(0, size_mul, 0, 3); |
|---|
| 733 | check_one_size_helper(0, size_mul, 3, 0); |
|---|
| 734 | check_one_size_helper(6, size_mul, 2, 3); |
|---|
| 735 | check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 1); |
|---|
| 736 | check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, 3); |
|---|
| 737 | check_one_size_helper(SIZE_MAX, size_mul, SIZE_MAX, -3); |
|---|
| 738 | |
|---|
| 739 | var = 4; |
|---|
| 740 | check_one_size_helper(9, size_add, var++, 5); |
|---|
| 741 | check_one_size_helper(9, size_add, 4, var++); |
|---|
| 742 | check_one_size_helper(9, size_add, 9, 0); |
|---|
| 743 | check_one_size_helper(9, size_add, 0, 9); |
|---|
| 744 | check_one_size_helper(5, size_add, 2, 3); |
|---|
| 745 | check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 1); |
|---|
| 746 | check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, 3); |
|---|
| 747 | check_one_size_helper(SIZE_MAX, size_add, SIZE_MAX, -3); |
|---|
| 748 | |
|---|
| 749 | var = 4; |
|---|
| 750 | check_one_size_helper(1, size_sub, var--, 3); |
|---|
| 751 | check_one_size_helper(1, size_sub, 4, var--); |
|---|
| 752 | check_one_size_helper(1, size_sub, 3, 2); |
|---|
| 753 | check_one_size_helper(9, size_sub, 9, 0); |
|---|
| 754 | check_one_size_helper(SIZE_MAX, size_sub, 9, -3); |
|---|
| 755 | check_one_size_helper(SIZE_MAX, size_sub, 0, 9); |
|---|
| 756 | check_one_size_helper(SIZE_MAX, size_sub, 2, 3); |
|---|
| 757 | check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 0); |
|---|
| 758 | check_one_size_helper(SIZE_MAX, size_sub, SIZE_MAX, 10); |
|---|
| 759 | check_one_size_helper(SIZE_MAX, size_sub, 0, SIZE_MAX); |
|---|
| 760 | check_one_size_helper(SIZE_MAX, size_sub, 14, SIZE_MAX); |
|---|
| 761 | check_one_size_helper(SIZE_MAX - 2, size_sub, SIZE_MAX - 1, 1); |
|---|
| 762 | check_one_size_helper(SIZE_MAX - 4, size_sub, SIZE_MAX - 1, 3); |
|---|
| 763 | check_one_size_helper(1, size_sub, SIZE_MAX - 1, -3); |
|---|
| 764 | |
|---|
| 765 | var = 4; |
|---|
| 766 | check_one_size_helper(4 * sizeof(*obj->data), |
|---|
| 767 | flex_array_size, obj, data, var++); |
|---|
| 768 | check_one_size_helper(5 * sizeof(*obj->data), |
|---|
| 769 | flex_array_size, obj, data, var++); |
|---|
| 770 | check_one_size_helper(0, flex_array_size, obj, data, 0 + unconst); |
|---|
| 771 | check_one_size_helper(sizeof(*obj->data), |
|---|
| 772 | flex_array_size, obj, data, 1 + unconst); |
|---|
| 773 | check_one_size_helper(7 * sizeof(*obj->data), |
|---|
| 774 | flex_array_size, obj, data, 7 + unconst); |
|---|
| 775 | check_one_size_helper(SIZE_MAX, |
|---|
| 776 | flex_array_size, obj, data, -1 + unconst); |
|---|
| 777 | check_one_size_helper(SIZE_MAX, |
|---|
| 778 | flex_array_size, obj, data, SIZE_MAX - 4 + unconst); |
|---|
| 779 | |
|---|
| 780 | var = 4; |
|---|
| 781 | check_one_size_helper(sizeof(*obj) + (4 * sizeof(*obj->data)), |
|---|
| 782 | struct_size, obj, data, var++); |
|---|
| 783 | check_one_size_helper(sizeof(*obj) + (5 * sizeof(*obj->data)), |
|---|
| 784 | struct_size, obj, data, var++); |
|---|
| 785 | check_one_size_helper(sizeof(*obj), struct_size, obj, data, 0 + unconst); |
|---|
| 786 | check_one_size_helper(sizeof(*obj) + sizeof(*obj->data), |
|---|
| 787 | struct_size, obj, data, 1 + unconst); |
|---|
| 788 | check_one_size_helper(SIZE_MAX, |
|---|
| 789 | struct_size, obj, data, -3 + unconst); |
|---|
| 790 | check_one_size_helper(SIZE_MAX, |
|---|
| 791 | struct_size, obj, data, SIZE_MAX - 3 + unconst); |
|---|
| 792 | |
|---|
| 793 | kunit_info(test, "%d overflow size helper tests finished\n" , count); |
|---|
| 794 | #undef check_one_size_helper |
|---|
| 795 | } |
|---|
| 796 | |
|---|
| 797 | static void overflows_type_test(struct kunit *test) |
|---|
| 798 | { |
|---|
| 799 | int count = 0; |
|---|
| 800 | unsigned int var; |
|---|
| 801 | |
|---|
| 802 | #define __TEST_OVERFLOWS_TYPE(func, arg1, arg2, of) do { \ |
|---|
| 803 | bool |
|---|
