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e5f5805f62
At the very beginning of the test we check if the underlying
filesystem supports extended attributes as they are used to store fake
SELinux labels. In order to check that, a dummy file is created and
semi-random attribute is set. However, the file is created under:
abs_srcdir "/securityselinuxlabeldata/testxattr"
which has two problems: abs_srcdir is not required to be writable, so
it should have been abs_builddir. The second one is - there's no
"securityselinuxlabeldata" folder under abs_builddir. The problem was
introduced in caf164f1.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
391 lines
9.8 KiB
C
391 lines
9.8 KiB
C
/*
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* Copyright (C) 2011-2014 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* License along with this library; If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <selinux/selinux.h>
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#include <selinux/context.h>
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#include <attr/xattr.h>
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#include "internal.h"
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#include "testutils.h"
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#include "testutilsqemu.h"
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#include "qemu/qemu_domain.h"
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#include "viralloc.h"
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#include "virerror.h"
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#include "virfile.h"
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#include "virlog.h"
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#include "security/security_manager.h"
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#include "virstring.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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VIR_LOG_INIT("tests.securityselinuxlabeltest");
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static virCapsPtr caps;
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static virDomainXMLOptionPtr xmlopt;
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static virSecurityManagerPtr mgr;
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typedef struct testSELinuxFile testSELinuxFile;
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struct testSELinuxFile {
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char *file;
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char *context;
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};
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static int
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testUserXattrEnabled(void)
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{
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int ret = -1;
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ssize_t len;
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const char *con_value = "system_u:object_r:svirt_image_t:s0:c41,c264";
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char *path = NULL;
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if (virAsprintf(&path, "%s/securityselinuxlabeldata/testxattr",
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abs_builddir) < 0)
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goto cleanup;
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if (virFileMakePath(abs_builddir "/securityselinuxlabeldata") < 0 ||
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virFileTouch(path, 0600) < 0)
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goto cleanup;
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len = setxattr(path, "user.libvirt.selinux", con_value,
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strlen(con_value), 0);
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if (len < 0) {
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if (errno == EOPNOTSUPP)
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ret = 0;
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goto cleanup;
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}
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ret = 1;
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cleanup:
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unlink(path);
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rmdir(abs_builddir "/securityselinuxlabeldata");
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VIR_FREE(path);
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return ret;
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}
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static int
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testSELinuxMungePath(char **path)
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{
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char *tmp;
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if (virAsprintf(&tmp, "%s/securityselinuxlabeldata%s",
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abs_builddir, *path) < 0)
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return -1;
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VIR_FREE(*path);
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*path = tmp;
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return 0;
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}
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static int
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testSELinuxLoadFileList(const char *testname,
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testSELinuxFile **files,
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size_t *nfiles)
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{
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int ret = -1;
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char *path = NULL;
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FILE *fp = NULL;
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char *line = NULL;
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*files = NULL;
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*nfiles = 0;
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if (virAsprintf(&path, "%s/securityselinuxlabeldata/%s.txt",
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abs_srcdir, testname) < 0)
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goto cleanup;
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if (!(fp = fopen(path, "r"))) {
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goto cleanup;
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}
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if (VIR_ALLOC_N(line, 1024) < 0)
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goto cleanup;
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while (!feof(fp)) {
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char *file = NULL, *context = NULL, *tmp;
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if (!fgets(line, 1024, fp)) {
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if (!feof(fp))
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goto cleanup;
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break;
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}
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tmp = strchr(line, ';');
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if (!tmp) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"unexpected format for line '%s'",
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line);
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goto cleanup;
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}
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*tmp = '\0';
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tmp++;
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if (virAsprintf(&file, "%s/securityselinuxlabeldata%s",
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abs_builddir, line) < 0)
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goto cleanup;
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if (*tmp != '\0' && *tmp != '\n') {
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if (VIR_STRDUP(context, tmp) < 0) {
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VIR_FREE(file);
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goto cleanup;
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}
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tmp = strchr(context, '\n');
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if (tmp)
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*tmp = '\0';
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}
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if (VIR_EXPAND_N(*files, *nfiles, 1) < 0) {
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VIR_FREE(file);
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VIR_FREE(context);
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goto cleanup;
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}
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(*files)[(*nfiles)-1].file = file;
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(*files)[(*nfiles)-1].context = context;
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}
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ret = 0;
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cleanup:
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VIR_FORCE_FCLOSE(fp);
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VIR_FREE(path);
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VIR_FREE(line);
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return ret;
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}
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static virDomainDefPtr
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testSELinuxLoadDef(const char *testname)
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{
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char *xmlfile = NULL;
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char *xmlstr = NULL;
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virDomainDefPtr def = NULL;
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size_t i;
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if (virAsprintf(&xmlfile, "%s/securityselinuxlabeldata/%s.xml",
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abs_srcdir, testname) < 0)
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goto cleanup;
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if (virFileReadAll(xmlfile, 1024*1024, &xmlstr) < 0) {
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goto cleanup;
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}
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if (!(def = virDomainDefParseString(xmlstr, caps, xmlopt,
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QEMU_EXPECTED_VIRT_TYPES,
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0)))
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goto cleanup;
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for (i = 0; i < def->ndisks; i++) {
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if (def->disks[i]->src->type != VIR_STORAGE_TYPE_FILE &&
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def->disks[i]->src->type != VIR_STORAGE_TYPE_BLOCK)
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continue;
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if (testSELinuxMungePath(&def->disks[i]->src->path) < 0)
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goto cleanup;
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}
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for (i = 0; i < def->nserials; i++) {
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if (def->serials[i]->source.type != VIR_DOMAIN_CHR_TYPE_FILE &&
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def->serials[i]->source.type != VIR_DOMAIN_CHR_TYPE_PIPE &&
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def->serials[i]->source.type != VIR_DOMAIN_CHR_TYPE_DEV &&
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def->serials[i]->source.type != VIR_DOMAIN_CHR_TYPE_UNIX)
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continue;
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if (def->serials[i]->source.type == VIR_DOMAIN_CHR_TYPE_UNIX) {
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if (testSELinuxMungePath(&def->serials[i]->source.data.nix.path) < 0)
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goto cleanup;
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} else {
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if (testSELinuxMungePath(&def->serials[i]->source.data.file.path) < 0)
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goto cleanup;
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}
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}
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if (def->os.kernel &&
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testSELinuxMungePath(&def->os.kernel) < 0)
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goto cleanup;
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if (def->os.initrd &&
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testSELinuxMungePath(&def->os.initrd) < 0)
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goto cleanup;
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cleanup:
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VIR_FREE(xmlfile);
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VIR_FREE(xmlstr);
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return def;
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}
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static int
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testSELinuxCreateDisks(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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if (virFileMakePath(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
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return -1;
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for (i = 0; i < nfiles; i++) {
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if (virFileTouch(files[i].file, 0600) < 0)
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return -1;
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}
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return 0;
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}
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static int
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testSELinuxDeleteDisks(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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for (i = 0; i < nfiles; i++) {
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if (unlink(files[i].file) < 0)
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return -1;
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}
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if (rmdir(abs_builddir "/securityselinuxlabeldata/nfs") < 0)
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return -1;
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/* Ignore failure to remove non-empty directory with in-tree build */
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rmdir(abs_builddir "/securityselinuxlabeldata");
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return 0;
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}
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static int
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testSELinuxCheckLabels(testSELinuxFile *files, size_t nfiles)
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{
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size_t i;
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security_context_t ctx;
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for (i = 0; i < nfiles; i++) {
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ctx = NULL;
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if (getfilecon(files[i].file, &ctx) < 0) {
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if (errno == ENODATA) {
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/* nothing to do */
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} else if (errno == EOPNOTSUPP) {
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if (VIR_STRDUP(ctx, "EOPNOTSUPP") < 0)
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return -1;
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} else {
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virReportSystemError(errno,
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"Cannot read label on %s",
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files[i].file);
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return -1;
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}
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}
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if (!STREQ_NULLABLE(files[i].context, ctx)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"File %s context '%s' did not match epected '%s'",
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files[i].file, ctx, files[i].context);
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VIR_FREE(ctx);
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return -1;
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}
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VIR_FREE(ctx);
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}
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return 0;
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}
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static int
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testSELinuxLabeling(const void *opaque)
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{
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const char *testname = opaque;
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int ret = -1;
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testSELinuxFile *files = NULL;
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size_t nfiles = 0;
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size_t i;
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virDomainDefPtr def = NULL;
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if (testSELinuxLoadFileList(testname, &files, &nfiles) < 0)
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goto cleanup;
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if (testSELinuxCreateDisks(files, nfiles) < 0)
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goto cleanup;
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if (!(def = testSELinuxLoadDef(testname)))
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goto cleanup;
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if (virSecurityManagerSetAllLabel(mgr, def, NULL) < 0)
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goto cleanup;
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if (testSELinuxCheckLabels(files, nfiles) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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if (testSELinuxDeleteDisks(files, nfiles) < 0)
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VIR_WARN("unable to fully clean up");
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virDomainDefFree(def);
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for (i = 0; i < nfiles; i++) {
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VIR_FREE(files[i].file);
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VIR_FREE(files[i].context);
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}
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VIR_FREE(files);
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if (ret < 0 && virTestGetVerbose()) {
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virErrorPtr err = virGetLastError();
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fprintf(stderr, "%s\n", err ? err->message : "<unknown>");
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}
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return ret;
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}
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static int
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mymain(void)
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{
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int ret = 0;
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int rc = testUserXattrEnabled();
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if (rc < 0)
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return EXIT_FAILURE;
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if (!rc)
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return EXIT_AM_SKIP;
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if (!(mgr = virSecurityManagerNew("selinux", "QEMU", false, true, false))) {
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virErrorPtr err = virGetLastError();
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fprintf(stderr, "Unable to initialize security driver: %s\n",
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err->message);
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return EXIT_FAILURE;
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}
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if ((caps = testQemuCapsInit()) == NULL)
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return EXIT_FAILURE;
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if (!(xmlopt = virQEMUDriverCreateXMLConf(NULL)))
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return EXIT_FAILURE;
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#define DO_TEST_LABELING(name) \
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if (virtTestRun("Labelling " # name, testSELinuxLabeling, name) < 0) \
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ret = -1;
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setcon((security_context_t)"system_r:system_u:libvirtd_t:s0:c0.c1023");
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DO_TEST_LABELING("disks");
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DO_TEST_LABELING("kernel");
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DO_TEST_LABELING("chardev");
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DO_TEST_LABELING("nfs");
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return (ret == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIRT_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/libsecurityselinuxhelper.so")
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