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6d395665e5
This reverts commit 6355e75610.
The previously mentioned commit inadvertently broke a lot of SELinux related
functionality for both unprivileged users and systemd instances running as
MANAGER_USER. In particular, setting the correct SELinux context after a User=
directive is used would fail to work since we attempt to set the security
context after changing UID. Additionally, it causes activated socket units to
be mislabeled for systemd --user processes since setsockcreatecon() would never
be called.
Reverting this fixes the issues with labeling outlined above, and reinstates
SELinux access checks on unprivileged user services.
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/***
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This file is part of systemd.
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Copyright 2016 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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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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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/stat.h>
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#include "alloc-util.h"
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#include "fd-util.h"
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#include "log.h"
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#include "selinux-util.h"
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#include "string-util.h"
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#include "time-util.h"
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#include "util.h"
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static void test_testing(void) {
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bool b;
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log_info("============ %s ==========", __func__);
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b = mac_selinux_use();
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log_info("mac_selinux_use → %s", yes_no(b));
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b = mac_selinux_use();
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log_info("mac_selinux_use → %s", yes_no(b));
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mac_selinux_retest();
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b = mac_selinux_use();
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log_info("mac_selinux_use → %s", yes_no(b));
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b = mac_selinux_use();
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log_info("mac_selinux_use → %s", yes_no(b));
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}
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static void test_loading(void) {
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usec_t n1, n2;
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int r;
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log_info("============ %s ==========", __func__);
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n1 = now(CLOCK_MONOTONIC);
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r = mac_selinux_init();
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n2 = now(CLOCK_MONOTONIC);
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log_info_errno(r, "mac_selinux_init → %d %.2fs (%m)", r, (n2 - n1)/1e6);
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}
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static void test_cleanup(void) {
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usec_t n1, n2;
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log_info("============ %s ==========", __func__);
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n1 = now(CLOCK_MONOTONIC);
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mac_selinux_finish();
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n2 = now(CLOCK_MONOTONIC);
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log_info("mac_selinux_finish → %.2fs", (n2 - n1)/1e6);
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}
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static void test_misc(const char* fname) {
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_cleanup_(mac_selinux_freep) char *label = NULL, *label2 = NULL, *label3 = NULL;
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int r;
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_cleanup_close_ int fd = -1;
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log_info("============ %s ==========", __func__);
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r = mac_selinux_get_our_label(&label);
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log_info_errno(r, "mac_selinux_get_our_label → %d, \"%s\" (%m)",
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r, strnull(label));
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r = mac_selinux_get_create_label_from_exe(fname, &label2);
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log_info_errno(r, "mac_selinux_create_label_from_exe → %d, \"%s\" (%m)",
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r, strnull(label2));
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fd = socket(AF_INET, SOCK_DGRAM, 0);
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assert_se(fd >= 0);
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r = mac_selinux_get_child_mls_label(fd, fname, label2, &label3);
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log_info_errno(r, "mac_selinux_get_child_mls_label → %d, \"%s\" (%m)",
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r, strnull(label3));
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}
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static void test_create_file_prepare(const char* fname) {
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int r;
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log_info("============ %s ==========", __func__);
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r = mac_selinux_create_file_prepare(fname, S_IRWXU);
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log_info_errno(r, "mac_selinux_create_file_prepare → %d (%m)", r);
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mac_selinux_create_file_clear();
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}
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int main(int argc, char **argv) {
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const char *path = SYSTEMD_BINARY_PATH;
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if (argc >= 2)
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path = argv[1];
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log_set_max_level(LOG_DEBUG);
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log_parse_environment();
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test_testing();
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test_loading();
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test_misc(path);
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test_create_file_prepare(path);
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test_cleanup();
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return 0;
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}
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