test: Refactor: Put seccomp tests into child processes ; Simplfy .sh
Refactor the test logic. Seccomp tests that can be killed run in their own subprocess now. All test functions now return 0 on success. Therefore, the shell script can be simplified.
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142
test.c
142
test.c
@ -4,6 +4,7 @@
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/wait.h>
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int xqssb_enable_policy(struct qssb_policy *policy)
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{
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@ -23,10 +24,70 @@ int test_default_main(int argc, char *argv[])
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return ret;
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}
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int test_seccomp_blacklisted(int argc, char *argv[])
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static int test_expected_kill(int (*f)())
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{
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pid_t pid = fork();
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if(pid == 0)
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{
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return f();
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}
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int status = 0;
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waitpid(pid, &status, 0);
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if(WIFSIGNALED(status))
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{
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int c = WTERMSIG(status);
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if(c == SIGSYS)
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{
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printf("Got expected signal\n");
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return 0;
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}
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printf("Unexpected status code: %i\n", c);
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return 1;
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}
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else
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{
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int c = WEXITSTATUS(status);
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printf("Process was not killed, test fails. Status code of exit: %i\n", c);
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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 test_successful_exit(int (*f)())
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{
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pid_t pid = fork();
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if(pid == 0)
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{
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return f();
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}
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int status = 0;
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waitpid(pid, &status, 0);
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if(WIFSIGNALED(status))
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{
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int c = WTERMSIG(status);
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printf("Received signal, which was not expected. Signal was: %i\n", c);
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return 1;
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}
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else
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{
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int c = WEXITSTATUS(status);
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if(c != 0)
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{
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printf("Process failed to exit properly. Status code is: %i\n", c);
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}
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return c;
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}
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printf("Process exited sucessfully as expected");
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return 0;
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}
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static int do_test_seccomp_blacklisted()
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{
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struct qssb_policy *policy = qssb_init_policy();
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qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
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qssb_append_syscall_default_policy(policy, QSSB_SYSCALL_ALLOW);
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@ -35,9 +96,16 @@ int test_seccomp_blacklisted(int argc, char *argv[])
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uid_t pid = geteuid();
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pid = getuid();
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return 0;
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}
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int test_seccomp_blacklisted(int argc, char *argv[])
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{
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return test_expected_kill(&do_test_seccomp_blacklisted);
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}
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int test_seccomp_blacklisted_call_permitted(int argc, char *argv[])
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static int do_test_seccomp_blacklisted_call_permitted()
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{
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struct qssb_policy *policy = qssb_init_policy();
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@ -50,19 +118,20 @@ int test_seccomp_blacklisted_call_permitted(int argc, char *argv[])
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return 0;
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}
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int test_seccomp_x32_kill(int argc, char *argv[])
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int test_seccomp_blacklisted_call_permitted(int argc, char *argv[])
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{
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return test_successful_exit(&do_test_seccomp_blacklisted_call_permitted);
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}
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static int do_test_seccomp_x32_kill()
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{
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struct qssb_policy *policy = qssb_init_policy();
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qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
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qssb_append_syscall_default_policy(policy, QSSB_SYSCALL_ALLOW);
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int ret = qssb_enable_policy(policy);
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if(ret != 0)
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{
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fprintf(stderr, "Error: Enabling is expected to succeed. Returning 0 to indicate failure of this test\n");
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return 0;
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}
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xqssb_enable_policy(policy);
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/* Attempt to bypass by falling back to x32 should be blocked */
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syscall(QSSB_SYS(getuid)+__X32_SYSCALL_BIT);
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@ -70,6 +139,11 @@ int test_seccomp_x32_kill(int argc, char *argv[])
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return 0;
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}
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int test_seccomp_x32_kill(int argc, char *argv[])
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{
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return test_expected_kill(&do_test_seccomp_x32_kill);
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}
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/* Tests whether seccomp rules end with a policy matching all syscalls */
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int test_seccomp_require_last_matchall(int argc, char *argv[])
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{
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@ -77,13 +151,18 @@ int test_seccomp_require_last_matchall(int argc, char *argv[])
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qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_KILL_PROCESS, QSSB_SYS(getuid));
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return qssb_enable_policy(policy);
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int status = qssb_enable_policy(policy);
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if(status == 0)
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{
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printf("Failed. Should not have been enabled!");
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return 1;
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}
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return 0;
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}
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int test_seccomp_errno(int argc, char *argv[])
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static int do_test_seccomp_errno()
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{
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struct qssb_policy *policy = qssb_init_policy();
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policy->not_dumpable = 0;
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qssb_append_syscall_policy(policy, QSSB_SYSCALL_DENY_RET_ERROR, QSSB_SYS(close));
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qssb_append_syscall_default_policy(policy, QSSB_SYSCALL_ALLOW);
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@ -96,6 +175,13 @@ int test_seccomp_errno(int argc, char *argv[])
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return fd == -1 ? 0 : 1;
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}
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int test_seccomp_errno(int argc, char *argv[])
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{
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return test_successful_exit(&do_test_seccomp_errno);
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}
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int test_landlock(int argc, char *argv[])
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{
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struct qssb_policy *policy = qssb_init_policy();
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@ -138,14 +224,14 @@ int test_nofs(int argc, char *argv[])
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if(s == -1)
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{
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fprintf(stderr, "Failed to open socket but this was not requested by policy\n");
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return 0;
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return 1;
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}
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/* Expect seccomp to take care of this */
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if(open("/test", O_CREAT | O_WRONLY) >= 0)
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{
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fprintf(stderr, "Failed: Do not expect write access\n");
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return -1;
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fprintf(stderr, "Failed: We do not expect write access\n");
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return 1;
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}
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return 0;
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@ -185,25 +271,23 @@ struct dispatcher
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{
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char *name;
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int (*f)(int, char **);
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bool must_exit_zero;
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};
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struct dispatcher dispatchers[] = {
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{ "default", &test_default_main, true },
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{ "seccomp-blacklisted", &test_seccomp_blacklisted, false },
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{ "seccomp-blacklisted-permitted", &test_seccomp_blacklisted_call_permitted, true },
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{ "seccomp-x32-kill", &test_seccomp_x32_kill, false},
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{ "seccomp-require-last-matchall", &test_seccomp_require_last_matchall, false},
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{ "seccomp-errno", &test_seccomp_errno, true},
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{ "landlock", &test_landlock, true },
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{ "landlock-deny-write", &test_landlock_deny_write, true },
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{ "no_fs", &test_nofs, false},
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{ "no_new_fds", &test_no_new_fds, true}
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{ "default", &test_default_main },
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{ "seccomp-blacklisted", &test_seccomp_blacklisted},
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{ "seccomp-blacklisted-permitted", &test_seccomp_blacklisted_call_permitted},
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{ "seccomp-x32-kill", &test_seccomp_x32_kill},
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{ "seccomp-require-last-matchall", &test_seccomp_require_last_matchall},
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{ "seccomp-errno", &test_seccomp_errno},
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{ "landlock", &test_landlock},
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{ "landlock-deny-write", &test_landlock_deny_write },
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{ "no_fs", &test_nofs},
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{ "no_new_fds", &test_no_new_fds}
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};
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int main(int argc, char *argv[])
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{
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if(argc < 2)
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{
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fprintf(stderr, "Usage: %s [testname]\n", argv[0]);
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@ -214,7 +298,7 @@ int main(int argc, char *argv[])
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{
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for(unsigned int i = 0; i < sizeof(dispatchers)/sizeof(dispatchers[0]); i++)
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{
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printf("%s:%i\n", dispatchers[i].name, dispatchers[i].must_exit_zero ? 1 : 0);
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printf("%s\n", dispatchers[i].name);
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}
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return EXIT_SUCCESS;
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}
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28
test.sh
28
test.sh
@ -32,8 +32,7 @@ function runtest_success()
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function runtest()
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{
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testname="$1"
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must_exit_zero="$2"
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test_log_file="$3"
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test_log_file="$2"
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echo "Running: $testname. Date: $(date)" > "${test_log_file}"
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@ -42,24 +41,14 @@ function runtest()
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(./test $1 || exit $?) &>> "${test_log_file}"
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ret=$?
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SUCCESS="no"
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if [ $must_exit_zero -eq 1 ] ; then
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if [ $ret -eq 0 ] ; then
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runtest_success
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SUCCESS="yes"
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else
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runtest_fail
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fi
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if [ $ret -eq 0 ] ; then
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runtest_success
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SUCCESS="yes"
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else
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if [ $ret -eq 0 ] ; then
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runtest_fail
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else
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runtest_success
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SUCCESS="yes"
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fi
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runtest_fail
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fi
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echo "Finished: ${testname}. Date: $(date). Return code: $ret. Success: $SUCCESS" >> "${test_log_file}"
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echo "Finished: ${testname}. Date: $(date). Success: $SUCCESS" >> "${test_log_file}"
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}
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GIT_ID=$( git log --pretty="format:%h" -n1 )
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@ -73,9 +62,8 @@ LOG_OUTPUT_DIR_PATH="${LOG_OUTPUT_DIR}/qssb_test_${GIT_ID}_${TIMESTAMP}"
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[ -d "$LOG_OUTPUT_DIR_PATH" ] || mkdir -p "$LOG_OUTPUT_DIR_PATH"
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for test in $( ./test --dumptests ) ; do
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testname=$( echo $test | cut -d":" -f1 )
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must_exit_zero=$( echo "$test" | cut -d":" -f2 )
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runtest "$testname" $must_exit_zero "${LOG_OUTPUT_DIR_PATH}/log.${testname}"
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testname=$( echo $test )
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runtest "$testname" "${LOG_OUTPUT_DIR_PATH}/log.${testname}"
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done
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echo
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echo "Tests finished. Logs in $(realpath ${LOG_OUTPUT_DIR_PATH})"
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