479 lines
15 KiB
C
479 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2020 ARM Limited
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#define _GNU_SOURCE
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include "kselftest.h"
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#include "mte_common_util.h"
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#include "mte_def.h"
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#define OVERFLOW_RANGE MT_GRANULE_SIZE
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static int sizes[] = {
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1, 555, 1033, MT_GRANULE_SIZE - 1, MT_GRANULE_SIZE,
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/* page size - 1*/ 0, /* page_size */ 0, /* page size + 1 */ 0
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};
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enum mte_block_test_alloc {
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UNTAGGED_TAGGED,
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TAGGED_UNTAGGED,
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TAGGED_TAGGED,
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BLOCK_ALLOC_MAX,
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};
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static int check_buffer_by_byte(int mem_type, int mode)
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{
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char *ptr;
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int i, j, item;
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bool err;
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mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
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item = sizeof(sizes)/sizeof(int);
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for (i = 0; i < item; i++) {
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ptr = (char *)mte_allocate_memory(sizes[i], mem_type, 0, true);
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if (check_allocated_memory(ptr, sizes[i], mem_type, true) != KSFT_PASS)
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return KSFT_FAIL;
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mte_initialize_current_context(mode, (uintptr_t)ptr, sizes[i]);
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/* Set some value in tagged memory */
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for (j = 0; j < sizes[i]; j++)
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ptr[j] = '1';
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mte_wait_after_trig();
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err = cur_mte_cxt.fault_valid;
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/* Check the buffer whether it is filled. */
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for (j = 0; j < sizes[i] && !err; j++) {
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if (ptr[j] != '1')
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err = true;
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}
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mte_free_memory((void *)ptr, sizes[i], mem_type, true);
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if (err)
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break;
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}
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if (!err)
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return KSFT_PASS;
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else
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return KSFT_FAIL;
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}
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static int check_buffer_underflow_by_byte(int mem_type, int mode,
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int underflow_range)
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{
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char *ptr;
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int i, j, item, last_index;
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bool err;
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char *und_ptr = NULL;
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mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
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item = sizeof(sizes)/sizeof(int);
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for (i = 0; i < item; i++) {
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ptr = (char *)mte_allocate_memory_tag_range(sizes[i], mem_type, 0,
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underflow_range, 0);
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if (check_allocated_memory_range(ptr, sizes[i], mem_type,
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underflow_range, 0) != KSFT_PASS)
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return KSFT_FAIL;
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mte_initialize_current_context(mode, (uintptr_t)ptr, -underflow_range);
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last_index = 0;
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/* Set some value in tagged memory and make the buffer underflow */
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for (j = sizes[i] - 1; (j >= -underflow_range) &&
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(!cur_mte_cxt.fault_valid); j--) {
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ptr[j] = '1';
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last_index = j;
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}
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mte_wait_after_trig();
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err = false;
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/* Check whether the buffer is filled */
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for (j = 0; j < sizes[i]; j++) {
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if (ptr[j] != '1') {
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err = true;
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ksft_print_msg("Buffer is not filled at index:%d of ptr:0x%lx\n",
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j, ptr);
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break;
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}
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}
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if (err)
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goto check_buffer_underflow_by_byte_err;
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switch (mode) {
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case MTE_NONE_ERR:
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if (cur_mte_cxt.fault_valid == true || last_index != -underflow_range) {
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err = true;
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break;
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}
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/* There were no fault so the underflow area should be filled */
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und_ptr = (char *) MT_CLEAR_TAG((size_t) ptr - underflow_range);
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for (j = 0 ; j < underflow_range; j++) {
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if (und_ptr[j] != '1') {
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err = true;
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break;
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}
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}
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break;
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case MTE_ASYNC_ERR:
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/* Imprecise fault should occur otherwise return error */
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if (cur_mte_cxt.fault_valid == false) {
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err = true;
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break;
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}
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/*
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* The imprecise fault is checked after the write to the buffer,
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* so the underflow area before the fault should be filled.
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*/
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und_ptr = (char *) MT_CLEAR_TAG((size_t) ptr);
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for (j = last_index ; j < 0 ; j++) {
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if (und_ptr[j] != '1') {
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err = true;
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break;
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}
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}
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break;
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case MTE_SYNC_ERR:
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/* Precise fault should occur otherwise return error */
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if (!cur_mte_cxt.fault_valid || (last_index != (-1))) {
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err = true;
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break;
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}
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/* Underflow area should not be filled */
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und_ptr = (char *) MT_CLEAR_TAG((size_t) ptr);
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if (und_ptr[-1] == '1')
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err = true;
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break;
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default:
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err = true;
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break;
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}
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check_buffer_underflow_by_byte_err:
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mte_free_memory_tag_range((void *)ptr, sizes[i], mem_type, underflow_range, 0);
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if (err)
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break;
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}
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return (err ? KSFT_FAIL : KSFT_PASS);
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}
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static int check_buffer_overflow_by_byte(int mem_type, int mode,
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int overflow_range)
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{
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char *ptr;
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int i, j, item, last_index;
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bool err;
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size_t tagged_size, overflow_size;
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char *over_ptr = NULL;
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mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
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item = sizeof(sizes)/sizeof(int);
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for (i = 0; i < item; i++) {
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ptr = (char *)mte_allocate_memory_tag_range(sizes[i], mem_type, 0,
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0, overflow_range);
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if (check_allocated_memory_range(ptr, sizes[i], mem_type,
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0, overflow_range) != KSFT_PASS)
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return KSFT_FAIL;
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tagged_size = MT_ALIGN_UP(sizes[i]);
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mte_initialize_current_context(mode, (uintptr_t)ptr, sizes[i] + overflow_range);
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/* Set some value in tagged memory and make the buffer underflow */
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for (j = 0, last_index = 0 ; (j < (sizes[i] + overflow_range)) &&
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(cur_mte_cxt.fault_valid == false); j++) {
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ptr[j] = '1';
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last_index = j;
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}
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mte_wait_after_trig();
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err = false;
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/* Check whether the buffer is filled */
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for (j = 0; j < sizes[i]; j++) {
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if (ptr[j] != '1') {
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err = true;
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ksft_print_msg("Buffer is not filled at index:%d of ptr:0x%lx\n",
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j, ptr);
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break;
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}
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}
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if (err)
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goto check_buffer_overflow_by_byte_err;
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overflow_size = overflow_range - (tagged_size - sizes[i]);
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switch (mode) {
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case MTE_NONE_ERR:
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if ((cur_mte_cxt.fault_valid == true) ||
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(last_index != (sizes[i] + overflow_range - 1))) {
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err = true;
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break;
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}
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/* There were no fault so the overflow area should be filled */
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over_ptr = (char *) MT_CLEAR_TAG((size_t) ptr + tagged_size);
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for (j = 0 ; j < overflow_size; j++) {
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if (over_ptr[j] != '1') {
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err = true;
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break;
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}
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}
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break;
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case MTE_ASYNC_ERR:
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/* Imprecise fault should occur otherwise return error */
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if (cur_mte_cxt.fault_valid == false) {
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err = true;
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break;
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}
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/*
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* The imprecise fault is checked after the write to the buffer,
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* so the overflow area should be filled before the fault.
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*/
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over_ptr = (char *) MT_CLEAR_TAG((size_t) ptr);
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for (j = tagged_size ; j < last_index; j++) {
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if (over_ptr[j] != '1') {
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err = true;
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break;
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}
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}
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break;
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case MTE_SYNC_ERR:
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/* Precise fault should occur otherwise return error */
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if (!cur_mte_cxt.fault_valid || (last_index != tagged_size)) {
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err = true;
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break;
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}
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/* Underflow area should not be filled */
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over_ptr = (char *) MT_CLEAR_TAG((size_t) ptr + tagged_size);
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for (j = 0 ; j < overflow_size; j++) {
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if (over_ptr[j] == '1')
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err = true;
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}
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break;
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default:
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err = true;
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break;
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}
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check_buffer_overflow_by_byte_err:
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mte_free_memory_tag_range((void *)ptr, sizes[i], mem_type, 0, overflow_range);
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if (err)
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break;
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}
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return (err ? KSFT_FAIL : KSFT_PASS);
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}
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static int check_buffer_by_block_iterate(int mem_type, int mode, size_t size)
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{
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char *src, *dst;
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int j, result = KSFT_PASS;
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enum mte_block_test_alloc alloc_type = UNTAGGED_TAGGED;
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for (alloc_type = UNTAGGED_TAGGED; alloc_type < (int) BLOCK_ALLOC_MAX; alloc_type++) {
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switch (alloc_type) {
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case UNTAGGED_TAGGED:
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src = (char *)mte_allocate_memory(size, mem_type, 0, false);
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if (check_allocated_memory(src, size, mem_type, false) != KSFT_PASS)
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return KSFT_FAIL;
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dst = (char *)mte_allocate_memory(size, mem_type, 0, true);
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if (check_allocated_memory(dst, size, mem_type, true) != KSFT_PASS) {
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mte_free_memory((void *)src, size, mem_type, false);
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return KSFT_FAIL;
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}
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break;
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case TAGGED_UNTAGGED:
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dst = (char *)mte_allocate_memory(size, mem_type, 0, false);
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if (check_allocated_memory(dst, size, mem_type, false) != KSFT_PASS)
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return KSFT_FAIL;
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src = (char *)mte_allocate_memory(size, mem_type, 0, true);
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if (check_allocated_memory(src, size, mem_type, true) != KSFT_PASS) {
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mte_free_memory((void *)dst, size, mem_type, false);
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return KSFT_FAIL;
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}
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break;
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case TAGGED_TAGGED:
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src = (char *)mte_allocate_memory(size, mem_type, 0, true);
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if (check_allocated_memory(src, size, mem_type, true) != KSFT_PASS)
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return KSFT_FAIL;
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dst = (char *)mte_allocate_memory(size, mem_type, 0, true);
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if (check_allocated_memory(dst, size, mem_type, true) != KSFT_PASS) {
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mte_free_memory((void *)src, size, mem_type, true);
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return KSFT_FAIL;
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}
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break;
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default:
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return KSFT_FAIL;
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}
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cur_mte_cxt.fault_valid = false;
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result = KSFT_PASS;
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mte_initialize_current_context(mode, (uintptr_t)dst, size);
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/* Set some value in memory and copy*/
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memset((void *)src, (int)'1', size);
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memcpy((void *)dst, (void *)src, size);
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mte_wait_after_trig();
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if (cur_mte_cxt.fault_valid) {
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result = KSFT_FAIL;
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goto check_buffer_by_block_err;
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}
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/* Check the buffer whether it is filled. */
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for (j = 0; j < size; j++) {
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if (src[j] != dst[j] || src[j] != '1') {
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result = KSFT_FAIL;
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break;
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}
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}
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check_buffer_by_block_err:
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mte_free_memory((void *)src, size, mem_type,
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MT_FETCH_TAG((uintptr_t)src) ? true : false);
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mte_free_memory((void *)dst, size, mem_type,
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MT_FETCH_TAG((uintptr_t)dst) ? true : false);
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if (result != KSFT_PASS)
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return result;
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}
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return result;
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}
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static int check_buffer_by_block(int mem_type, int mode)
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{
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int i, item, result = KSFT_PASS;
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mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
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item = sizeof(sizes)/sizeof(int);
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cur_mte_cxt.fault_valid = false;
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for (i = 0; i < item; i++) {
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result = check_buffer_by_block_iterate(mem_type, mode, sizes[i]);
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if (result != KSFT_PASS)
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break;
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}
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return result;
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}
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static int compare_memory_tags(char *ptr, size_t size, int tag)
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{
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int i, new_tag;
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for (i = 0 ; i < size ; i += MT_GRANULE_SIZE) {
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new_tag = MT_FETCH_TAG((uintptr_t)(mte_get_tag_address(ptr + i)));
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if (tag != new_tag) {
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ksft_print_msg("FAIL: child mte tag mismatch\n");
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return KSFT_FAIL;
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}
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}
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return KSFT_PASS;
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}
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static int check_memory_initial_tags(int mem_type, int mode, int mapping)
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{
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char *ptr;
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int run, fd;
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int total = sizeof(sizes)/sizeof(int);
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mte_switch_mode(mode, MTE_ALLOW_NON_ZERO_TAG);
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for (run = 0; run < total; run++) {
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/* check initial tags for anonymous mmap */
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ptr = (char *)mte_allocate_memory(sizes[run], mem_type, mapping, false);
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if (check_allocated_memory(ptr, sizes[run], mem_type, false) != KSFT_PASS)
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return KSFT_FAIL;
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if (compare_memory_tags(ptr, sizes[run], 0) != KSFT_PASS) {
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mte_free_memory((void *)ptr, sizes[run], mem_type, false);
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return KSFT_FAIL;
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}
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mte_free_memory((void *)ptr, sizes[run], mem_type, false);
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/* check initial tags for file mmap */
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fd = create_temp_file();
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if (fd == -1)
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return KSFT_FAIL;
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ptr = (char *)mte_allocate_file_memory(sizes[run], mem_type, mapping, false, fd);
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if (check_allocated_memory(ptr, sizes[run], mem_type, false) != KSFT_PASS) {
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close(fd);
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return KSFT_FAIL;
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}
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if (compare_memory_tags(ptr, sizes[run], 0) != KSFT_PASS) {
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mte_free_memory((void *)ptr, sizes[run], mem_type, false);
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close(fd);
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return KSFT_FAIL;
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}
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mte_free_memory((void *)ptr, sizes[run], mem_type, false);
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close(fd);
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}
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return KSFT_PASS;
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}
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int main(int argc, char *argv[])
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{
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int err;
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size_t page_size = getpagesize();
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int item = sizeof(sizes)/sizeof(int);
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sizes[item - 3] = page_size - 1;
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sizes[item - 2] = page_size;
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sizes[item - 1] = page_size + 1;
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err = mte_default_setup();
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if (err)
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return err;
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/* Register SIGSEGV handler */
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mte_register_signal(SIGSEGV, mte_default_handler);
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/* Set test plan */
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ksft_set_plan(20);
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/* Buffer by byte tests */
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evaluate_test(check_buffer_by_byte(USE_MMAP, MTE_SYNC_ERR),
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"Check buffer correctness by byte with sync err mode and mmap memory\n");
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evaluate_test(check_buffer_by_byte(USE_MMAP, MTE_ASYNC_ERR),
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"Check buffer correctness by byte with async err mode and mmap memory\n");
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evaluate_test(check_buffer_by_byte(USE_MPROTECT, MTE_SYNC_ERR),
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"Check buffer correctness by byte with sync err mode and mmap/mprotect memory\n");
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evaluate_test(check_buffer_by_byte(USE_MPROTECT, MTE_ASYNC_ERR),
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"Check buffer correctness by byte with async err mode and mmap/mprotect memory\n");
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/* Check buffer underflow with underflow size as 16 */
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_SYNC_ERR, MT_GRANULE_SIZE),
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"Check buffer write underflow by byte with sync mode and mmap memory\n");
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_ASYNC_ERR, MT_GRANULE_SIZE),
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"Check buffer write underflow by byte with async mode and mmap memory\n");
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_NONE_ERR, MT_GRANULE_SIZE),
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"Check buffer write underflow by byte with tag check fault ignore and mmap memory\n");
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/* Check buffer underflow with underflow size as page size */
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_SYNC_ERR, page_size),
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"Check buffer write underflow by byte with sync mode and mmap memory\n");
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_ASYNC_ERR, page_size),
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"Check buffer write underflow by byte with async mode and mmap memory\n");
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evaluate_test(check_buffer_underflow_by_byte(USE_MMAP, MTE_NONE_ERR, page_size),
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"Check buffer write underflow by byte with tag check fault ignore and mmap memory\n");
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/* Check buffer overflow with overflow size as 16 */
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evaluate_test(check_buffer_overflow_by_byte(USE_MMAP, MTE_SYNC_ERR, MT_GRANULE_SIZE),
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"Check buffer write overflow by byte with sync mode and mmap memory\n");
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evaluate_test(check_buffer_overflow_by_byte(USE_MMAP, MTE_ASYNC_ERR, MT_GRANULE_SIZE),
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"Check buffer write overflow by byte with async mode and mmap memory\n");
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evaluate_test(check_buffer_overflow_by_byte(USE_MMAP, MTE_NONE_ERR, MT_GRANULE_SIZE),
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"Check buffer write overflow by byte with tag fault ignore mode and mmap memory\n");
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/* Buffer by block tests */
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evaluate_test(check_buffer_by_block(USE_MMAP, MTE_SYNC_ERR),
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"Check buffer write correctness by block with sync mode and mmap memory\n");
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evaluate_test(check_buffer_by_block(USE_MMAP, MTE_ASYNC_ERR),
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"Check buffer write correctness by block with async mode and mmap memory\n");
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evaluate_test(check_buffer_by_block(USE_MMAP, MTE_NONE_ERR),
|
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"Check buffer write correctness by block with tag fault ignore and mmap memory\n");
|
|
|
|
/* Initial tags are supposed to be 0 */
|
|
evaluate_test(check_memory_initial_tags(USE_MMAP, MTE_SYNC_ERR, MAP_PRIVATE),
|
|
"Check initial tags with private mapping, sync error mode and mmap memory\n");
|
|
evaluate_test(check_memory_initial_tags(USE_MPROTECT, MTE_SYNC_ERR, MAP_PRIVATE),
|
|
"Check initial tags with private mapping, sync error mode and mmap/mprotect memory\n");
|
|
evaluate_test(check_memory_initial_tags(USE_MMAP, MTE_SYNC_ERR, MAP_SHARED),
|
|
"Check initial tags with shared mapping, sync error mode and mmap memory\n");
|
|
evaluate_test(check_memory_initial_tags(USE_MPROTECT, MTE_SYNC_ERR, MAP_SHARED),
|
|
"Check initial tags with shared mapping, sync error mode and mmap/mprotect memory\n");
|
|
|
|
mte_restore_setup();
|
|
ksft_print_cnts();
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return ksft_get_fail_cnt() == 0 ? KSFT_PASS : KSFT_FAIL;
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}
|