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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 | // SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2020 ARM Limited #define _GNU_SOURCE #include <errno.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ucontext.h> #include <sys/wait.h> #include "kselftest.h" #include "mte_common_util.h" #include "mte_def.h" #define BUFFER_SIZE (5 * MT_GRANULE_SIZE) #define RUNS (MT_TAG_COUNT) #define UNDERFLOW MT_GRANULE_SIZE #define OVERFLOW MT_GRANULE_SIZE static size_t page_size; static int sizes[] = { 1, 537, 989, 1269, MT_GRANULE_SIZE - 1, MT_GRANULE_SIZE, /* page size - 1*/ 0, /* page_size */ 0, /* page size + 1 */ 0 }; static int check_child_tag_inheritance(char *ptr, int size, int mode) { int i, parent_tag, child_tag, fault, child_status; pid_t child; parent_tag = MT_FETCH_TAG((uintptr_t)ptr); fault = 0; child = fork(); if (child == -1) { ksft_print_msg("FAIL: child process creation\n"); return KSFT_FAIL; } else if (child == 0) { mte_initialize_current_context(mode, (uintptr_t)ptr, size); /* Do copy on write */ memset(ptr, '1', size); mte_wait_after_trig(); if (cur_mte_cxt.fault_valid == true) { fault = 1; goto check_child_tag_inheritance_err; } for (i = 0 ; i < size ; i += MT_GRANULE_SIZE) { child_tag = MT_FETCH_TAG((uintptr_t)(mte_get_tag_address(ptr + i))); if (parent_tag != child_tag) { ksft_print_msg("FAIL: child mte tag mismatch\n"); fault = 1; goto check_child_tag_inheritance_err; } } mte_initialize_current_context(mode, (uintptr_t)ptr, -UNDERFLOW); memset(ptr - UNDERFLOW, '2', UNDERFLOW); mte_wait_after_trig(); if (cur_mte_cxt.fault_valid == false) { fault = 1; goto check_child_tag_inheritance_err; } mte_initialize_current_context(mode, (uintptr_t)ptr, size + OVERFLOW); memset(ptr + size, '3', OVERFLOW); mte_wait_after_trig(); if (cur_mte_cxt.fault_valid == false) { fault = 1; goto check_child_tag_inheritance_err; } check_child_tag_inheritance_err: _exit(fault); } /* Wait for child process to terminate */ wait(&child_status); if (WIFEXITED(child_status)) fault = WEXITSTATUS(child_status); else fault = 1; return (fault) ? KSFT_FAIL : KSFT_PASS; } static int check_child_memory_mapping(int mem_type, int mode, int mapping) { char *ptr; int run, result; int item = ARRAY_SIZE(sizes); item = ARRAY_SIZE(sizes); mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG); for (run = 0; run < item; run++) { ptr = (char *)mte_allocate_memory_tag_range(sizes[run], mem_type, mapping, UNDERFLOW, OVERFLOW); if (check_allocated_memory_range(ptr, sizes[run], mem_type, UNDERFLOW, OVERFLOW) != KSFT_PASS) return KSFT_FAIL; result = check_child_tag_inheritance(ptr, sizes[run], mode); mte_free_memory_tag_range((void *)ptr, sizes[run], mem_type, UNDERFLOW, OVERFLOW); if (result == KSFT_FAIL) return result; } return KSFT_PASS; } static int check_child_file_mapping(int mem_type, int mode, int mapping) { char *ptr, *map_ptr; int run, fd, map_size, result = KSFT_PASS; int total = ARRAY_SIZE(sizes); mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG); for (run = 0; run < total; run++) { fd = create_temp_file(); if (fd == -1) return KSFT_FAIL; map_size = sizes[run] + OVERFLOW + UNDERFLOW; map_ptr = (char *)mte_allocate_file_memory(map_size, mem_type, mapping, false, fd); if (check_allocated_memory(map_ptr, map_size, mem_type, false) != KSFT_PASS) { close(fd); return KSFT_FAIL; } ptr = map_ptr + UNDERFLOW; mte_initialize_current_context(mode, (uintptr_t)ptr, sizes[run]); /* Only mte enabled memory will allow tag insertion */ ptr = mte_insert_tags((void *)ptr, sizes[run]); if (!ptr || cur_mte_cxt.fault_valid == true) { ksft_print_msg("FAIL: Insert tags on file based memory\n"); munmap((void *)map_ptr, map_size); close(fd); return KSFT_FAIL; } result = check_child_tag_inheritance(ptr, sizes[run], mode); mte_clear_tags((void *)ptr, sizes[run]); munmap((void *)map_ptr, map_size); close(fd); if (result != KSFT_PASS) return KSFT_FAIL; } return KSFT_PASS; } int main(int argc, char *argv[]) { int err; int item = ARRAY_SIZE(sizes); page_size = getpagesize(); if (!page_size) { ksft_print_msg("ERR: Unable to get page size\n"); return KSFT_FAIL; } sizes[item - 3] = page_size - 1; sizes[item - 2] = page_size; sizes[item - 1] = page_size + 1; err = mte_default_setup(); if (err) return err; /* Register SIGSEGV handler */ mte_register_signal(SIGSEGV, mte_default_handler); mte_register_signal(SIGBUS, mte_default_handler); /* Set test plan */ ksft_set_plan(12); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE), "Check child anonymous memory with private mapping, precise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED), "Check child anonymous memory with shared mapping, precise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_ASYNC_ERR, MAP_PRIVATE), "Check child anonymous memory with private mapping, imprecise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_ASYNC_ERR, MAP_SHARED), "Check child anonymous memory with shared mapping, imprecise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MPROTECT, MTE_SYNC_ERR, MAP_PRIVATE), "Check child anonymous memory with private mapping, precise mode and mmap/mprotect memory\n"); evaluate_test(check_child_memory_mapping(USE_MPROTECT, MTE_SYNC_ERR, MAP_SHARED), "Check child anonymous memory with shared mapping, precise mode and mmap/mprotect memory\n"); evaluate_test(check_child_file_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE), "Check child file memory with private mapping, precise mode and mmap memory\n"); evaluate_test(check_child_file_mapping(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED), "Check child file memory with shared mapping, precise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_ASYNC_ERR, MAP_PRIVATE), "Check child file memory with private mapping, imprecise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MMAP, MTE_ASYNC_ERR, MAP_SHARED), "Check child file memory with shared mapping, imprecise mode and mmap memory\n"); evaluate_test(check_child_memory_mapping(USE_MPROTECT, MTE_SYNC_ERR, MAP_PRIVATE), "Check child file memory with private mapping, precise mode and mmap/mprotect memory\n"); evaluate_test(check_child_memory_mapping(USE_MPROTECT, MTE_SYNC_ERR, MAP_SHARED), "Check child file memory with shared mapping, precise mode and mmap/mprotect memory\n"); mte_restore_setup(); ksft_print_cnts(); return ksft_get_fail_cnt() == 0 ? KSFT_PASS : KSFT_FAIL; } |