120 lines
1.9 KiB
C
120 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* test system mappings are sealed when
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* KCONFIG_MSEAL_SYSTEM_MAPPINGS=y
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdbool.h>
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#include "../kselftest.h"
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#include "../kselftest_harness.h"
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#define VMFLAGS "VmFlags:"
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#define MSEAL_FLAGS "sl"
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#define MAX_LINE_LEN 512
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bool has_mapping(char *name, FILE *maps)
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{
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char line[MAX_LINE_LEN];
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while (fgets(line, sizeof(line), maps)) {
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if (strstr(line, name))
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return true;
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}
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return false;
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}
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bool mapping_is_sealed(char *name, FILE *maps)
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{
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char line[MAX_LINE_LEN];
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while (fgets(line, sizeof(line), maps)) {
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if (!strncmp(line, VMFLAGS, strlen(VMFLAGS))) {
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if (strstr(line, MSEAL_FLAGS))
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return true;
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return false;
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}
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}
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return false;
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}
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FIXTURE(basic) {
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FILE *maps;
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};
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FIXTURE_SETUP(basic)
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{
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self->maps = fopen("/proc/self/smaps", "r");
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if (!self->maps)
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SKIP(return, "Could not open /proc/self/smap, errno=%d",
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errno);
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};
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FIXTURE_TEARDOWN(basic)
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{
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if (self->maps)
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fclose(self->maps);
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};
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FIXTURE_VARIANT(basic)
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{
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char *name;
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bool sealed;
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};
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FIXTURE_VARIANT_ADD(basic, vdso) {
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.name = "[vdso]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, vvar) {
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.name = "[vvar]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, vvar_vclock) {
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.name = "[vvar_vclock]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, sigpage) {
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.name = "[sigpage]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, vectors) {
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.name = "[vectors]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, uprobes) {
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.name = "[uprobes]",
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.sealed = true,
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};
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FIXTURE_VARIANT_ADD(basic, stack) {
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.name = "[stack]",
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.sealed = false,
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};
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TEST_F(basic, check_sealed)
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{
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if (!has_mapping(variant->name, self->maps)) {
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SKIP(return, "could not find the mapping, %s",
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variant->name);
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}
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EXPECT_EQ(variant->sealed,
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mapping_is_sealed(variant->name, self->maps));
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};
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TEST_HARNESS_MAIN
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