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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | /* * Test cases for lib/hexdump.c module. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/random.h> #include <linux/string.h> static const unsigned char data_b[] = { '\xbe', '\x32', '\xdb', '\x7b', '\x0a', '\x18', '\x93', '\xb2', /* 00 - 07 */ '\x70', '\xba', '\xc4', '\x24', '\x7d', '\x83', '\x34', '\x9b', /* 08 - 0f */ '\xa6', '\x9c', '\x31', '\xad', '\x9c', '\x0f', '\xac', '\xe9', /* 10 - 17 */ '\x4c', '\xd1', '\x19', '\x99', '\x43', '\xb1', '\xaf', '\x0c', /* 18 - 1f */ }; static const unsigned char data_a[] = ".2.{....p..$}.4...1.....L...C..."; static const char *test_data_1_le[] __initconst = { "be", "32", "db", "7b", "0a", "18", "93", "b2", "70", "ba", "c4", "24", "7d", "83", "34", "9b", "a6", "9c", "31", "ad", "9c", "0f", "ac", "e9", "4c", "d1", "19", "99", "43", "b1", "af", "0c", }; static const char *test_data_2_le[] __initconst = { "32be", "7bdb", "180a", "b293", "ba70", "24c4", "837d", "9b34", "9ca6", "ad31", "0f9c", "e9ac", "d14c", "9919", "b143", "0caf", }; static const char *test_data_4_le[] __initconst = { "7bdb32be", "b293180a", "24c4ba70", "9b34837d", "ad319ca6", "e9ac0f9c", "9919d14c", "0cafb143", }; static const char *test_data_8_le[] __initconst = { "b293180a7bdb32be", "9b34837d24c4ba70", "e9ac0f9cad319ca6", "0cafb1439919d14c", }; static void __init test_hexdump(size_t len, int rowsize, int groupsize, bool ascii) { char test[32 * 3 + 2 + 32 + 1]; char real[32 * 3 + 2 + 32 + 1]; char *p; const char **result; size_t l = len; int gs = groupsize, rs = rowsize; unsigned int i; hex_dump_to_buffer(data_b, l, rs, gs, real, sizeof(real), ascii); if (rs != 16 && rs != 32) rs = 16; if (l > rs) l = rs; if (!is_power_of_2(gs) || gs > 8 || (len % gs != 0)) gs = 1; if (gs == 8) result = test_data_8_le; else if (gs == 4) result = test_data_4_le; else if (gs == 2) result = test_data_2_le; else result = test_data_1_le; memset(test, ' ', sizeof(test)); /* hex dump */ p = test; for (i = 0; i < l / gs; i++) { const char *q = *result++; size_t amount = strlen(q); strncpy(p, q, amount); p += amount + 1; } if (i) p--; /* ASCII part */ if (ascii) { p = test + rs * 2 + rs / gs + 1; strncpy(p, data_a, l); p += l; } *p = '\0'; if (strcmp(test, real)) { pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize); pr_err("Result: '%s'\n", real); pr_err("Expect: '%s'\n", test); } } static void __init test_hexdump_set(int rowsize, bool ascii) { size_t d = min_t(size_t, sizeof(data_b), rowsize); size_t len = get_random_int() % d + 1; test_hexdump(len, rowsize, 4, ascii); test_hexdump(len, rowsize, 2, ascii); test_hexdump(len, rowsize, 8, ascii); test_hexdump(len, rowsize, 1, ascii); } static void __init test_hexdump_overflow(bool ascii) { char buf[56]; const char *t = test_data_1_le[0]; size_t l = get_random_int() % sizeof(buf); bool a; int e, r; memset(buf, ' ', sizeof(buf)); r = hex_dump_to_buffer(data_b, 1, 16, 1, buf, l, ascii); if (ascii) e = 50; else e = 2; buf[e + 2] = '\0'; if (!l) { a = r == e && buf[0] == ' '; } else if (l < 3) { a = r == e && buf[0] == '\0'; } else if (l < 4) { a = r == e && !strcmp(buf, t); } else if (ascii) { if (l < 51) a = r == e && buf[l - 1] == '\0' && buf[l - 2] == ' '; else a = r == e && buf[50] == '\0' && buf[49] == '.'; } else { a = r == e && buf[e] == '\0'; } if (!a) { pr_err("Len: %zu rc: %u strlen: %zu\n", l, r, strlen(buf)); pr_err("Result: '%s'\n", buf); } } static int __init test_hexdump_init(void) { unsigned int i; int rowsize; pr_info("Running tests...\n"); rowsize = (get_random_int() % 2 + 1) * 16; for (i = 0; i < 16; i++) test_hexdump_set(rowsize, false); rowsize = (get_random_int() % 2 + 1) * 16; for (i = 0; i < 16; i++) test_hexdump_set(rowsize, true); for (i = 0; i < 16; i++) test_hexdump_overflow(false); for (i = 0; i < 16; i++) test_hexdump_overflow(true); return -EINVAL; } module_init(test_hexdump_init); MODULE_LICENSE("Dual BSD/GPL"); |