^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0 OR MIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Test cases for arithmetic overflow checks.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/overflow.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define DEFINE_TEST_ARRAY(t) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static const struct test_ ## t { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) t a, b; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) t sum, diff, prod; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) bool s_of, d_of, p_of; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) } t ## _tests[] __initconst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) DEFINE_TEST_ARRAY(u8) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {1, 1, 2, 0, 1, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {0, 1, 1, U8_MAX, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {1, 0, 1, 1, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {0, U8_MAX, U8_MAX, 1, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {U8_MAX, 0, U8_MAX, U8_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {1, U8_MAX, 0, 2, U8_MAX, true, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {U8_MAX, 1, 0, U8_MAX-1, U8_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {U8_MAX, U8_MAX, U8_MAX-1, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {U8_MAX, U8_MAX-1, U8_MAX-2, 1, 2, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) {U8_MAX-1, U8_MAX, U8_MAX-2, U8_MAX, 2, true, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {1U << 3, 1U << 3, 1U << 4, 0, 1U << 6, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {1U << 4, 1U << 4, 1U << 5, 0, 0, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {1U << 4, 1U << 3, 3*(1U << 3), 1U << 3, 1U << 7, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {1U << 7, 1U << 7, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {48, 32, 80, 16, 0, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {128, 128, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {123, 234, 101, 145, 110, true, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) DEFINE_TEST_ARRAY(u16) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {1, 1, 2, 0, 1, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {0, 1, 1, U16_MAX, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {1, 0, 1, 1, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {0, U16_MAX, U16_MAX, 1, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {U16_MAX, 0, U16_MAX, U16_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {1, U16_MAX, 0, 2, U16_MAX, true, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {U16_MAX, 1, 0, U16_MAX-1, U16_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {U16_MAX, U16_MAX, U16_MAX-1, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {U16_MAX, U16_MAX-1, U16_MAX-2, 1, 2, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) {U16_MAX-1, U16_MAX, U16_MAX-2, U16_MAX, 2, true, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {1U << 7, 1U << 7, 1U << 8, 0, 1U << 14, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {1U << 8, 1U << 8, 1U << 9, 0, 0, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {1U << 8, 1U << 7, 3*(1U << 7), 1U << 7, 1U << 15, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {1U << 15, 1U << 15, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {123, 234, 357, 65425, 28782, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {1234, 2345, 3579, 64425, 10146, false, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) DEFINE_TEST_ARRAY(u32) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {1, 1, 2, 0, 1, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {0, 1, 1, U32_MAX, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {1, 0, 1, 1, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {0, U32_MAX, U32_MAX, 1, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {U32_MAX, 0, U32_MAX, U32_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {1, U32_MAX, 0, 2, U32_MAX, true, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {U32_MAX, 1, 0, U32_MAX-1, U32_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {U32_MAX, U32_MAX, U32_MAX-1, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {U32_MAX, U32_MAX-1, U32_MAX-2, 1, 2, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {U32_MAX-1, U32_MAX, U32_MAX-2, U32_MAX, 2, true, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {1U << 15, 1U << 15, 1U << 16, 0, 1U << 30, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {1U << 16, 1U << 16, 1U << 17, 0, 0, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {1U << 16, 1U << 15, 3*(1U << 15), 1U << 15, 1U << 31, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {1U << 31, 1U << 31, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {-2U, 1U, -1U, -3U, -2U, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {-4U, 5U, 1U, -9U, -20U, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) DEFINE_TEST_ARRAY(u64) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {1, 1, 2, 0, 1, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {0, 1, 1, U64_MAX, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {1, 0, 1, 1, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {0, U64_MAX, U64_MAX, 1, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {U64_MAX, 0, U64_MAX, U64_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {1, U64_MAX, 0, 2, U64_MAX, true, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {U64_MAX, 1, 0, U64_MAX-1, U64_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {U64_MAX, U64_MAX, U64_MAX-1, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) {U64_MAX, U64_MAX-1, U64_MAX-2, 1, 2, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {U64_MAX-1, U64_MAX, U64_MAX-2, U64_MAX, 2, true, true, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {1ULL << 31, 1ULL << 31, 1ULL << 32, 0, 1ULL << 62, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {1ULL << 32, 1ULL << 32, 1ULL << 33, 0, 0, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {1ULL << 32, 1ULL << 31, 3*(1ULL << 31), 1ULL << 31, 1ULL << 63, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {1ULL << 63, 1ULL << 63, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {1000000000ULL /* 10^9 */, 10000000000ULL /* 10^10 */,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 11000000000ULL, 18446744064709551616ULL, 10000000000000000000ULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {-15ULL, 10ULL, -5ULL, -25ULL, -150ULL, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) DEFINE_TEST_ARRAY(s8) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {0, S8_MAX, S8_MAX, -S8_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) {S8_MAX, 0, S8_MAX, S8_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {0, S8_MIN, S8_MIN, S8_MIN, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {S8_MIN, 0, S8_MIN, S8_MIN, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {-1, S8_MIN, S8_MAX, S8_MAX, S8_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {S8_MIN, -1, S8_MAX, -S8_MAX, S8_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {-1, S8_MAX, S8_MAX-1, S8_MIN, -S8_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) {S8_MAX, -1, S8_MAX-1, S8_MIN, -S8_MAX, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {-1, -S8_MAX, S8_MIN, S8_MAX-1, S8_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {-S8_MAX, -1, S8_MIN, S8_MIN+2, S8_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {1, S8_MIN, -S8_MAX, -S8_MAX, S8_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {S8_MIN, 1, -S8_MAX, S8_MAX, S8_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {1, S8_MAX, S8_MIN, S8_MIN+2, S8_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {S8_MAX, 1, S8_MIN, S8_MAX-1, S8_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {S8_MIN, S8_MIN, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {S8_MAX, S8_MAX, -2, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {-4, -32, -36, 28, -128, false, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {-4, 32, 28, -36, -128, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) DEFINE_TEST_ARRAY(s16) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {0, S16_MAX, S16_MAX, -S16_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {S16_MAX, 0, S16_MAX, S16_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {0, S16_MIN, S16_MIN, S16_MIN, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) {S16_MIN, 0, S16_MIN, S16_MIN, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {-1, S16_MIN, S16_MAX, S16_MAX, S16_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {S16_MIN, -1, S16_MAX, -S16_MAX, S16_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {-1, S16_MAX, S16_MAX-1, S16_MIN, -S16_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {S16_MAX, -1, S16_MAX-1, S16_MIN, -S16_MAX, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {-1, -S16_MAX, S16_MIN, S16_MAX-1, S16_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {-S16_MAX, -1, S16_MIN, S16_MIN+2, S16_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {1, S16_MIN, -S16_MAX, -S16_MAX, S16_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) {S16_MIN, 1, -S16_MAX, S16_MAX, S16_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {1, S16_MAX, S16_MIN, S16_MIN+2, S16_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {S16_MAX, 1, S16_MIN, S16_MAX-1, S16_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {S16_MIN, S16_MIN, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {S16_MAX, S16_MAX, -2, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) DEFINE_TEST_ARRAY(s32) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {0, S32_MAX, S32_MAX, -S32_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {S32_MAX, 0, S32_MAX, S32_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) {0, S32_MIN, S32_MIN, S32_MIN, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {S32_MIN, 0, S32_MIN, S32_MIN, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {-1, S32_MIN, S32_MAX, S32_MAX, S32_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {S32_MIN, -1, S32_MAX, -S32_MAX, S32_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {-1, S32_MAX, S32_MAX-1, S32_MIN, -S32_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {S32_MAX, -1, S32_MAX-1, S32_MIN, -S32_MAX, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {-1, -S32_MAX, S32_MIN, S32_MAX-1, S32_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {-S32_MAX, -1, S32_MIN, S32_MIN+2, S32_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {1, S32_MIN, -S32_MAX, -S32_MAX, S32_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {S32_MIN, 1, -S32_MAX, S32_MAX, S32_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {1, S32_MAX, S32_MIN, S32_MIN+2, S32_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) {S32_MAX, 1, S32_MIN, S32_MAX-1, S32_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {S32_MIN, S32_MIN, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {S32_MAX, S32_MAX, -2, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) DEFINE_TEST_ARRAY(s64) = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {0, 0, 0, 0, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) {0, S64_MAX, S64_MAX, -S64_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {S64_MAX, 0, S64_MAX, S64_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {0, S64_MIN, S64_MIN, S64_MIN, 0, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {S64_MIN, 0, S64_MIN, S64_MIN, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) {-1, S64_MIN, S64_MAX, S64_MAX, S64_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {S64_MIN, -1, S64_MAX, -S64_MAX, S64_MIN, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {-1, S64_MAX, S64_MAX-1, S64_MIN, -S64_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {S64_MAX, -1, S64_MAX-1, S64_MIN, -S64_MAX, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {-1, -S64_MAX, S64_MIN, S64_MAX-1, S64_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {-S64_MAX, -1, S64_MIN, S64_MIN+2, S64_MAX, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {1, S64_MIN, -S64_MAX, -S64_MAX, S64_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {S64_MIN, 1, -S64_MAX, S64_MAX, S64_MIN, false, true, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {1, S64_MAX, S64_MIN, S64_MIN+2, S64_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {S64_MAX, 1, S64_MIN, S64_MAX-1, S64_MAX, true, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) {S64_MIN, S64_MIN, 0, 0, 0, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {S64_MAX, S64_MAX, -2, 0, 1, true, false, true},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {-1, -1, -2, 0, 1, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) {-1, -128, -129, 127, 128, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {-128, -1, -129, -127, 128, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {0, -S64_MAX, -S64_MAX, S64_MAX, 0, false, false, false},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) #define check_one_op(t, fmt, op, sym, a, b, r, of) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) t _r; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) bool _of; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) _of = check_ ## op ## _overflow(a, b, &_r); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (_of != of) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) pr_warn("expected "fmt" "sym" "fmt \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) " to%s overflow (type %s)\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) a, b, of ? "" : " not", #t); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) err = 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (_r != r) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) pr_warn("expected "fmt" "sym" "fmt" == " \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) fmt", got "fmt" (type %s)\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) a, b, r, _r, #t); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) err = 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) #define DEFINE_TEST_FUNC(t, fmt) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static int __init do_test_ ## t(const struct test_ ## t *p) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int err = 0; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) check_one_op(t, fmt, add, "+", p->a, p->b, p->sum, p->s_of); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) check_one_op(t, fmt, add, "+", p->b, p->a, p->sum, p->s_of); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) check_one_op(t, fmt, sub, "-", p->a, p->b, p->diff, p->d_of); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) check_one_op(t, fmt, mul, "*", p->a, p->b, p->prod, p->p_of); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) check_one_op(t, fmt, mul, "*", p->b, p->a, p->prod, p->p_of); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return err; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static int __init test_ ## t ## _overflow(void) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int err = 0; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) unsigned i; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) pr_info("%-3s: %zu arithmetic tests\n", #t, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) ARRAY_SIZE(t ## _tests)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) for (i = 0; i < ARRAY_SIZE(t ## _tests); ++i) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) err |= do_test_ ## t(&t ## _tests[i]); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) return err; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) DEFINE_TEST_FUNC(u8, "%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) DEFINE_TEST_FUNC(s8, "%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) DEFINE_TEST_FUNC(u16, "%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) DEFINE_TEST_FUNC(s16, "%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) DEFINE_TEST_FUNC(u32, "%u");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) DEFINE_TEST_FUNC(s32, "%d");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) #if BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) DEFINE_TEST_FUNC(u64, "%llu");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) DEFINE_TEST_FUNC(s64, "%lld");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) static int __init test_overflow_calculation(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) err |= test_u8_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) err |= test_s8_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) err |= test_u16_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) err |= test_s16_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) err |= test_u32_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) err |= test_s32_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) #if BITS_PER_LONG == 64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) err |= test_u64_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) err |= test_s64_overflow();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int __init test_overflow_shift(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* Args are: value, shift, type, expected result, overflow expected */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) #define TEST_ONE_SHIFT(a, s, t, expect, of) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) int __failed = 0; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) typeof(a) __a = (a); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) typeof(s) __s = (s); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) t __e = (expect); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) t __d; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) bool __of = check_shl_overflow(__a, __s, &__d); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) if (__of != of) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) pr_warn("expected (%s)(%s << %s) to%s overflow\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #t, #a, #s, of ? "" : " not"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) __failed = 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) } else if (!__of && __d != __e) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) pr_warn("expected (%s)(%s << %s) == %s\n", \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #t, #a, #s, #expect); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) if ((t)-1 < 0) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) pr_warn("got %lld\n", (s64)__d); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) else \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) pr_warn("got %llu\n", (u64)__d); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) __failed = 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) if (!__failed) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) pr_info("ok: (%s)(%s << %s) == %s\n", #t, #a, #s, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) of ? "overflow" : #expect); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) __failed; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) /* Sane shifts. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) err |= TEST_ONE_SHIFT(1, 0, u8, 1 << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) err |= TEST_ONE_SHIFT(1, 4, u8, 1 << 4, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) err |= TEST_ONE_SHIFT(1, 7, u8, 1 << 7, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) err |= TEST_ONE_SHIFT(0xF, 4, u8, 0xF << 4, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) err |= TEST_ONE_SHIFT(1, 0, u16, 1 << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) err |= TEST_ONE_SHIFT(1, 10, u16, 1 << 10, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) err |= TEST_ONE_SHIFT(1, 15, u16, 1 << 15, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) err |= TEST_ONE_SHIFT(0xFF, 8, u16, 0xFF << 8, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) err |= TEST_ONE_SHIFT(1, 0, int, 1 << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) err |= TEST_ONE_SHIFT(1, 16, int, 1 << 16, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) err |= TEST_ONE_SHIFT(1, 30, int, 1 << 30, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) err |= TEST_ONE_SHIFT(1, 0, s32, 1 << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) err |= TEST_ONE_SHIFT(1, 16, s32, 1 << 16, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) err |= TEST_ONE_SHIFT(1, 30, s32, 1 << 30, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) err |= TEST_ONE_SHIFT(1, 0, unsigned int, 1U << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) err |= TEST_ONE_SHIFT(1, 20, unsigned int, 1U << 20, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) err |= TEST_ONE_SHIFT(1, 31, unsigned int, 1U << 31, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) err |= TEST_ONE_SHIFT(0xFFFFU, 16, unsigned int, 0xFFFFU << 16, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) err |= TEST_ONE_SHIFT(1, 0, u32, 1U << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) err |= TEST_ONE_SHIFT(1, 20, u32, 1U << 20, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) err |= TEST_ONE_SHIFT(1, 31, u32, 1U << 31, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) err |= TEST_ONE_SHIFT(0xFFFFU, 16, u32, 0xFFFFU << 16, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) err |= TEST_ONE_SHIFT(1, 0, u64, 1ULL << 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) err |= TEST_ONE_SHIFT(1, 40, u64, 1ULL << 40, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) err |= TEST_ONE_SHIFT(1, 63, u64, 1ULL << 63, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) err |= TEST_ONE_SHIFT(0xFFFFFFFFULL, 32, u64,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 0xFFFFFFFFULL << 32, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) /* Sane shift: start and end with 0, without a too-wide shift. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) err |= TEST_ONE_SHIFT(0, 7, u8, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) err |= TEST_ONE_SHIFT(0, 15, u16, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) err |= TEST_ONE_SHIFT(0, 31, unsigned int, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) err |= TEST_ONE_SHIFT(0, 31, u32, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) err |= TEST_ONE_SHIFT(0, 63, u64, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /* Sane shift: start and end with 0, without reaching signed bit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) err |= TEST_ONE_SHIFT(0, 6, s8, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) err |= TEST_ONE_SHIFT(0, 14, s16, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) err |= TEST_ONE_SHIFT(0, 30, int, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) err |= TEST_ONE_SHIFT(0, 30, s32, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) err |= TEST_ONE_SHIFT(0, 62, s64, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /* Overflow: shifted the bit off the end. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) err |= TEST_ONE_SHIFT(1, 8, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) err |= TEST_ONE_SHIFT(1, 16, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) err |= TEST_ONE_SHIFT(1, 32, unsigned int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) err |= TEST_ONE_SHIFT(1, 32, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) err |= TEST_ONE_SHIFT(1, 64, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /* Overflow: shifted into the signed bit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) err |= TEST_ONE_SHIFT(1, 7, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) err |= TEST_ONE_SHIFT(1, 15, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) err |= TEST_ONE_SHIFT(1, 31, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) err |= TEST_ONE_SHIFT(1, 31, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) err |= TEST_ONE_SHIFT(1, 63, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) /* Overflow: high bit falls off unsigned types. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) /* 10010110 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) err |= TEST_ONE_SHIFT(150, 1, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /* 1000100010010110 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) err |= TEST_ONE_SHIFT(34966, 1, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /* 10000100000010001000100010010110 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) err |= TEST_ONE_SHIFT(2215151766U, 1, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) err |= TEST_ONE_SHIFT(2215151766U, 1, unsigned int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) /* 1000001000010000010000000100000010000100000010001000100010010110 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) err |= TEST_ONE_SHIFT(9372061470395238550ULL, 1, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) /* Overflow: bit shifted into signed bit on signed types. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /* 01001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) err |= TEST_ONE_SHIFT(75, 1, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) /* 0100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) err |= TEST_ONE_SHIFT(17483, 1, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /* 01000010000001000100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) err |= TEST_ONE_SHIFT(1107575883, 1, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) err |= TEST_ONE_SHIFT(1107575883, 1, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) /* 0100000100001000001000000010000001000010000001000100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) err |= TEST_ONE_SHIFT(4686030735197619275LL, 1, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) /* Overflow: bit shifted past signed bit on signed types. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) /* 01001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) err |= TEST_ONE_SHIFT(75, 2, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /* 0100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) err |= TEST_ONE_SHIFT(17483, 2, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) /* 01000010000001000100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) err |= TEST_ONE_SHIFT(1107575883, 2, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) err |= TEST_ONE_SHIFT(1107575883, 2, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /* 0100000100001000001000000010000001000010000001000100010001001011 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) err |= TEST_ONE_SHIFT(4686030735197619275LL, 2, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /* Overflow: values larger than destination type. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) err |= TEST_ONE_SHIFT(0x100, 0, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) err |= TEST_ONE_SHIFT(0xFF, 0, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) err |= TEST_ONE_SHIFT(0x10000U, 0, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) err |= TEST_ONE_SHIFT(0xFFFFU, 0, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) err |= TEST_ONE_SHIFT(0x100000000ULL, 0, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) err |= TEST_ONE_SHIFT(0x100000000ULL, 0, unsigned int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) err |= TEST_ONE_SHIFT(0xFFFFFFFFUL, 0, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) err |= TEST_ONE_SHIFT(0xFFFFFFFFFFFFFFFFULL, 0, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* Nonsense: negative initial value. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) err |= TEST_ONE_SHIFT(-1, 0, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) err |= TEST_ONE_SHIFT(-1, 0, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) err |= TEST_ONE_SHIFT(-5, 0, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) err |= TEST_ONE_SHIFT(-5, 0, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) err |= TEST_ONE_SHIFT(-10, 0, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) err |= TEST_ONE_SHIFT(-10, 0, unsigned int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) err |= TEST_ONE_SHIFT(-100, 0, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) err |= TEST_ONE_SHIFT(-100, 0, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) err |= TEST_ONE_SHIFT(-10000, 0, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) err |= TEST_ONE_SHIFT(-10000, 0, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) /* Nonsense: negative shift values. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) err |= TEST_ONE_SHIFT(0, -5, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) err |= TEST_ONE_SHIFT(0, -5, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) err |= TEST_ONE_SHIFT(0, -10, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) err |= TEST_ONE_SHIFT(0, -10, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) err |= TEST_ONE_SHIFT(0, -15, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) err |= TEST_ONE_SHIFT(0, -15, unsigned int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) err |= TEST_ONE_SHIFT(0, -20, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) err |= TEST_ONE_SHIFT(0, -20, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) err |= TEST_ONE_SHIFT(0, -30, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) err |= TEST_ONE_SHIFT(0, -30, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) /* Overflow: shifted at or beyond entire type's bit width. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) err |= TEST_ONE_SHIFT(0, 8, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) err |= TEST_ONE_SHIFT(0, 9, u8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) err |= TEST_ONE_SHIFT(0, 8, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) err |= TEST_ONE_SHIFT(0, 9, s8, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) err |= TEST_ONE_SHIFT(0, 16, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) err |= TEST_ONE_SHIFT(0, 17, u16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) err |= TEST_ONE_SHIFT(0, 16, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) err |= TEST_ONE_SHIFT(0, 17, s16, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) err |= TEST_ONE_SHIFT(0, 32, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) err |= TEST_ONE_SHIFT(0, 33, u32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) err |= TEST_ONE_SHIFT(0, 32, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) err |= TEST_ONE_SHIFT(0, 33, int, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) err |= TEST_ONE_SHIFT(0, 32, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) err |= TEST_ONE_SHIFT(0, 33, s32, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) err |= TEST_ONE_SHIFT(0, 64, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) err |= TEST_ONE_SHIFT(0, 65, u64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) err |= TEST_ONE_SHIFT(0, 64, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) err |= TEST_ONE_SHIFT(0, 65, s64, 0, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) * Corner case: for unsigned types, we fail when we've shifted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) * through the entire width of bits. For signed types, we might
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) * want to match this behavior, but that would mean noticing if
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * we shift through all but the signed bit, and this is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) * currently detected (but we'll notice an overflow into the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) * signed bit). So, for now, we will test this condition but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * mark it as not expected to overflow.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) err |= TEST_ONE_SHIFT(0, 7, s8, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) err |= TEST_ONE_SHIFT(0, 15, s16, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err |= TEST_ONE_SHIFT(0, 31, int, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) err |= TEST_ONE_SHIFT(0, 31, s32, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) err |= TEST_ONE_SHIFT(0, 63, s64, 0, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) * Deal with the various forms of allocator arguments. See comments above
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) * the DEFINE_TEST_ALLOC() instances for mapping of the "bits".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) #define alloc_GFP (GFP_KERNEL | __GFP_NOWARN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) #define alloc010(alloc, arg, sz) alloc(sz, alloc_GFP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) #define alloc011(alloc, arg, sz) alloc(sz, alloc_GFP, NUMA_NO_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) #define alloc000(alloc, arg, sz) alloc(sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) #define alloc001(alloc, arg, sz) alloc(sz, NUMA_NO_NODE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) #define alloc110(alloc, arg, sz) alloc(arg, sz, alloc_GFP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) #define free0(free, arg, ptr) free(ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) #define free1(free, arg, ptr) free(arg, ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) /* Wrap around to 16K */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) #define TEST_SIZE (5 * 4096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) #define DEFINE_TEST_ALLOC(func, free_func, want_arg, want_gfp, want_node)\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) static int __init test_ ## func (void *arg) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) volatile size_t a = TEST_SIZE; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) volatile size_t b = (SIZE_MAX / TEST_SIZE) + 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) void *ptr; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) /* Tiny allocation test. */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, 1);\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (!ptr) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) pr_warn(#func " failed regular allocation?!\n"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) free ## want_arg (free_func, arg, ptr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) /* Wrapped allocation test. */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) a * b); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (!ptr) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) pr_warn(#func " unexpectedly failed bad wrapping?!\n"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) free ## want_arg (free_func, arg, ptr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* Saturated allocation test. */ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) ptr = alloc ## want_arg ## want_gfp ## want_node (func, arg, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) array_size(a, b)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if (ptr) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) pr_warn(#func " missed saturation!\n"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) free ## want_arg (free_func, arg, ptr); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return 1; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) pr_info(#func " detected saturation\n"); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) return 0; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * Allocator uses a trailing node argument --------+ (e.g. kmalloc_node())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * Allocator uses the gfp_t argument -----------+ | (e.g. kmalloc())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) * Allocator uses a special leading argument + | | (e.g. devm_kmalloc())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) * | | |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) DEFINE_TEST_ALLOC(kmalloc, kfree, 0, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) DEFINE_TEST_ALLOC(kmalloc_node, kfree, 0, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) DEFINE_TEST_ALLOC(kzalloc, kfree, 0, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) DEFINE_TEST_ALLOC(kzalloc_node, kfree, 0, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) DEFINE_TEST_ALLOC(vmalloc, vfree, 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) DEFINE_TEST_ALLOC(vmalloc_node, vfree, 0, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) DEFINE_TEST_ALLOC(vzalloc, vfree, 0, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) DEFINE_TEST_ALLOC(vzalloc_node, vfree, 0, 0, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) DEFINE_TEST_ALLOC(kvmalloc, kvfree, 0, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) DEFINE_TEST_ALLOC(kvmalloc_node, kvfree, 0, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) DEFINE_TEST_ALLOC(kvzalloc, kvfree, 0, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) DEFINE_TEST_ALLOC(kvzalloc_node, kvfree, 0, 1, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) DEFINE_TEST_ALLOC(devm_kmalloc, devm_kfree, 1, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) DEFINE_TEST_ALLOC(devm_kzalloc, devm_kfree, 1, 1, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) static int __init test_overflow_allocation(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) const char device_name[] = "overflow-test";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /* Create dummy device for devm_kmalloc()-family tests. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) dev = root_device_register(device_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (IS_ERR(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) pr_warn("Cannot register test device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) err |= test_kmalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) err |= test_kmalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) err |= test_kzalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) err |= test_kzalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) err |= test_kvmalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) err |= test_kvmalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) err |= test_kvzalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) err |= test_kvzalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) err |= test_vmalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) err |= test_vmalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) err |= test_vzalloc(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) err |= test_vzalloc_node(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) err |= test_devm_kmalloc(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) err |= test_devm_kzalloc(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) device_unregister(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) static int __init test_module_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) err |= test_overflow_calculation();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) err |= test_overflow_shift();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) err |= test_overflow_allocation();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) pr_warn("FAIL!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) pr_info("all tests passed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) static void __exit test_module_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) module_init(test_module_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) module_exit(test_module_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) MODULE_LICENSE("Dual MIT/GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags