From 900251c41dab192ff863024e07864c09462e86d2 Mon Sep 17 00:00:00 2001
From: Lukas Nykryn <lnykryn@redhat.com>
Date: Mon, 20 Mar 2017 12:24:09 +0100
Subject: [PATCH] test-capability: rebase to upstream version
Related: #1387398
---
src/test/test-capability.c | 80 +++++++++++++++++++---
src/test/test-execute.c | 43 ++++++++++++
...ec-capabilityambientset-merge-nfsnobody.service | 9 +++
test/exec-capabilityambientset-merge.service | 9 +++
test/exec-capabilityambientset-nfsnobody.service | 8 +++
test/exec-capabilityambientset.service | 8 +++
test/exec-capabilityboundingset-invert.service | 7 ++
test/exec-capabilityboundingset-merge.service | 8 +++
test/exec-capabilityboundingset-reset.service | 8 +++
test/exec-capabilityboundingset-simple.service | 7 ++
10 files changed, 179 insertions(+), 8 deletions(-)
create mode 100644 test/exec-capabilityambientset-merge-nfsnobody.service
create mode 100644 test/exec-capabilityambientset-merge.service
create mode 100644 test/exec-capabilityambientset-nfsnobody.service
create mode 100644 test/exec-capabilityambientset.service
create mode 100644 test/exec-capabilityboundingset-invert.service
create mode 100644 test/exec-capabilityboundingset-merge.service
create mode 100644 test/exec-capabilityboundingset-reset.service
create mode 100644 test/exec-capabilityboundingset-simple.service
diff --git a/src/test/test-capability.c b/src/test/test-capability.c
index 4376992..67a9ec2 100644
--- a/src/test/test-capability.c
+++ b/src/test/test-capability.c
@@ -17,21 +17,22 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/capability.h>
-#include <sys/socket.h>
#include <netinet/in.h>
#include <pwd.h>
+#include <sys/capability.h>
+#include <sys/prctl.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
#include <unistd.h>
#include "capability.h"
-#include "util.h"
#include "macro.h"
+#include "util.h"
static uid_t test_uid = -1;
static gid_t test_gid = -1;
-// We keep CAP_DAC_OVERRIDE to avoid errors with gcov when doing test coverage
+
+/* We keep CAP_DAC_OVERRIDE to avoid errors with gcov when doing test coverage */
static uint64_t test_flags = 1ULL << CAP_DAC_OVERRIDE;
static void fork_test(void (*test_func)(void)) {
@@ -65,8 +66,9 @@ static void show_capabilities(void) {
cap_free(text);
}
-static int setup_tests(void) {
+static int setup_tests(bool *run_ambient) {
struct passwd *nobody;
+ int r;
nobody = getpwnam("nobody");
if (!nobody) {
@@ -76,6 +78,18 @@ static int setup_tests(void) {
test_uid = nobody->pw_uid;
test_gid = nobody->pw_gid;
+ *run_ambient = false;
+
+ r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0);
+
+ /* There's support for PR_CAP_AMBIENT if the prctl() call
+ * succeeded or error code was something else than EINVAL. The
+ * EINVAL check should be good enough to rule out false
+ * positives. */
+
+ if (r >= 0 || errno != EINVAL)
+ *run_ambient = true;
+
return 0;
}
@@ -139,8 +153,53 @@ static void test_have_effective_cap(void) {
assert_se(!have_effective_cap(CAP_CHOWN));
}
+static void test_update_inherited_set(void) {
+ cap_t caps;
+ uint64_t set = 0;
+ cap_flag_value_t fv;
+
+ caps = cap_get_proc();
+ assert_se(caps);
+ assert_se(!cap_get_flag(caps, CAP_CHOWN, CAP_INHERITABLE, &fv));
+ assert(fv == CAP_CLEAR);
+
+ set = (UINT64_C(1) << CAP_CHOWN);
+
+ assert_se(!capability_update_inherited_set(caps, set));
+ assert_se(!cap_get_flag(caps, CAP_CHOWN, CAP_INHERITABLE, &fv));
+ assert(fv == CAP_SET);
+
+ cap_free(caps);
+}
+
+static void test_set_ambient_caps(void) {
+ cap_t caps;
+ uint64_t set = 0;
+ cap_flag_value_t fv;
+
+ caps = cap_get_proc();
+ assert_se(caps);
+ assert_se(!cap_get_flag(caps, CAP_CHOWN, CAP_INHERITABLE, &fv));
+ assert(fv == CAP_CLEAR);
+ cap_free(caps);
+
+ assert_se(prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_CHOWN, 0, 0) == 0);
+
+ set = (UINT64_C(1) << CAP_CHOWN);
+
+ assert_se(!capability_ambient_set_apply(set, true));
+
+ caps = cap_get_proc();
+ assert_se(!cap_get_flag(caps, CAP_CHOWN, CAP_INHERITABLE, &fv));
+ assert(fv == CAP_SET);
+ cap_free(caps);
+
+ assert_se(prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_CHOWN, 0, 0) == 1);
+}
+
int main(int argc, char *argv[]) {
int r;
+ bool run_ambient;
log_parse_environment();
log_open();
@@ -148,14 +207,19 @@ int main(int argc, char *argv[]) {
if (getuid() != 0)
return EXIT_TEST_SKIP;
- r = setup_tests();
+ r = setup_tests(&run_ambient);
if (r < 0)
return -r;
show_capabilities();
test_drop_privileges();
+ test_update_inherited_set();
+
fork_test(test_have_effective_cap);
+ if (run_ambient)
+ fork_test(test_set_ambient_caps);
+
return 0;
}
diff --git a/src/test/test-execute.c b/src/test/test-execute.c
index 6e5567c..8e70702 100644
--- a/src/test/test-execute.c
+++ b/src/test/test-execute.c
@@ -17,7 +17,11 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include <grp.h>
+#include <pwd.h>
#include <stdio.h>
+#include <sys/prctl.h>
+#include <sys/types.h>
#include "unit.h"
#include "manager.h"
@@ -25,6 +29,7 @@
#include "macro.h"
#include "strv.h"
#include "mkdir.h"
+#include "path-util.h"
typedef void (*test_function_t)(Manager *m);
@@ -177,6 +182,42 @@ static void test_exec_runtimedirectory(Manager *m) {
test(m, "exec-runtimedirectory-owner.service", 0, CLD_EXITED);
}
+static void test_exec_capabilityboundingset(Manager *m) {
+ int r;
+
+ r = find_binary("capsh", true, NULL);
+ if (r < 0) {
+ log_error_errno(r, "Skipping %s, could not find capsh binary: %m", __func__);
+ return;
+ }
+
+ test(m, "exec-capabilityboundingset-simple.service", 0, CLD_EXITED);
+ test(m, "exec-capabilityboundingset-reset.service", 0, CLD_EXITED);
+ test(m, "exec-capabilityboundingset-merge.service", 0, CLD_EXITED);
+ test(m, "exec-capabilityboundingset-invert.service", 0, CLD_EXITED);
+}
+
+static void test_exec_capabilityambientset(Manager *m) {
+ int r;
+
+ /* Check if the kernel has support for ambient capabilities. Run
+ * the tests only if that's the case. Clearing all ambient
+ * capabilities is fine, since we are expecting them to be unset
+ * in the first place for the tests. */
+ r = prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_CLEAR_ALL, 0, 0, 0);
+ if (r >= 0 || errno != EINVAL) {
+ if (getpwnam("nobody")) {
+ test(m, "exec-capabilityambientset.service", 0, CLD_EXITED);
+ test(m, "exec-capabilityambientset-merge.service", 0, CLD_EXITED);
+ } else if (getpwnam("nfsnobody")) {
+ test(m, "exec-capabilityambientset-nfsnobody.service", 0, CLD_EXITED);
+ test(m, "exec-capabilityambientset-merge-nfsnobody.service", 0, CLD_EXITED);
+ } else
+ log_error_errno(errno, "Skipping %s, could not find nobody/nfsnobody user: %m", __func__);
+ } else
+ log_error_errno(errno, "Skipping %s, the kernel does not support ambient capabilities: %m", __func__);
+}
+
int main(int argc, char *argv[]) {
test_function_t tests[] = {
test_exec_workingdirectory,
@@ -192,6 +233,8 @@ int main(int argc, char *argv[]) {
test_exec_passenvironment,
test_exec_umask,
test_exec_runtimedirectory,
+ test_exec_capabilityboundingset,
+ test_exec_capabilityambientset,
NULL,
};
test_function_t *test = NULL;
diff --git a/test/exec-capabilityambientset-merge-nfsnobody.service b/test/exec-capabilityambientset-merge-nfsnobody.service
new file mode 100644
index 0000000..00bec58
--- /dev/null
+++ b/test/exec-capabilityambientset-merge-nfsnobody.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Test for AmbientCapabilities
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(grep "CapAmb:" /proc/self/status); test "$$c" = "CapAmb: 0000000000003000"'
+Type=oneshot
+User=nfsnobody
+AmbientCapabilities=CAP_NET_ADMIN
+AmbientCapabilities=CAP_NET_RAW
diff --git a/test/exec-capabilityambientset-merge.service b/test/exec-capabilityambientset-merge.service
new file mode 100644
index 0000000..6496438
--- /dev/null
+++ b/test/exec-capabilityambientset-merge.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Test for AmbientCapabilities
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(grep "CapAmb:" /proc/self/status); test "$$c" = "CapAmb: 0000000000003000"'
+Type=oneshot
+User=nobody
+AmbientCapabilities=CAP_NET_ADMIN
+AmbientCapabilities=CAP_NET_RAW
diff --git a/test/exec-capabilityambientset-nfsnobody.service b/test/exec-capabilityambientset-nfsnobody.service
new file mode 100644
index 0000000..614cfdd
--- /dev/null
+++ b/test/exec-capabilityambientset-nfsnobody.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Test for AmbientCapabilities
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(grep "CapAmb:" /proc/self/status); test "$$c" = "CapAmb: 0000000000003000"'
+Type=oneshot
+User=nfsnobody
+AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW
diff --git a/test/exec-capabilityambientset.service b/test/exec-capabilityambientset.service
new file mode 100644
index 0000000..d63f884
--- /dev/null
+++ b/test/exec-capabilityambientset.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Test for AmbientCapabilities
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(grep "CapAmb:" /proc/self/status); test "$$c" = "CapAmb: 0000000000003000"'
+Type=oneshot
+User=nobody
+AmbientCapabilities=CAP_NET_ADMIN CAP_NET_RAW
diff --git a/test/exec-capabilityboundingset-invert.service b/test/exec-capabilityboundingset-invert.service
new file mode 100644
index 0000000..fd5d248
--- /dev/null
+++ b/test/exec-capabilityboundingset-invert.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Test for CapabilityBoundingSet
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(capsh --print | grep "^Bounding set .*cap_chown"); test -z "$$c"'
+Type=oneshot
+CapabilityBoundingSet=~CAP_CHOWN
diff --git a/test/exec-capabilityboundingset-merge.service b/test/exec-capabilityboundingset-merge.service
new file mode 100644
index 0000000..5c7fcaf
--- /dev/null
+++ b/test/exec-capabilityboundingset-merge.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Test for CapabilityBoundingSet
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(capsh --print | grep "Bounding set "); test "$$c" = "Bounding set =cap_chown,cap_fowner,cap_kill"'
+Type=oneshot
+CapabilityBoundingSet=CAP_FOWNER
+CapabilityBoundingSet=CAP_KILL CAP_CHOWN
diff --git a/test/exec-capabilityboundingset-reset.service b/test/exec-capabilityboundingset-reset.service
new file mode 100644
index 0000000..d7d3320
--- /dev/null
+++ b/test/exec-capabilityboundingset-reset.service
@@ -0,0 +1,8 @@
+[Unit]
+Description=Test for CapabilityBoundingSet
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(capsh --print | grep "Bounding set "); test "$$c" = "Bounding set ="'
+Type=oneshot
+CapabilityBoundingSet=CAP_FOWNER CAP_KILL
+CapabilityBoundingSet=
diff --git a/test/exec-capabilityboundingset-simple.service b/test/exec-capabilityboundingset-simple.service
new file mode 100644
index 0000000..bf1a7f5
--- /dev/null
+++ b/test/exec-capabilityboundingset-simple.service
@@ -0,0 +1,7 @@
+[Unit]
+Description=Test for CapabilityBoundingSet
+
+[Service]
+ExecStart=/bin/sh -x -c 'c=$$(capsh --print | grep "Bounding set "); test "$$c" = "Bounding set =cap_fowner,cap_kill"'
+Type=oneshot
+CapabilityBoundingSet=CAP_FOWNER CAP_KILL