1*fdd8201dSApple OSS Distributions #include <stdio.h> 2*fdd8201dSApple OSS Distributions #include <mach/message.h> 3*fdd8201dSApple OSS Distributions #include <mach/mach_vm.h> 4*fdd8201dSApple OSS Distributions #include <mach/mach_port.h> 5*fdd8201dSApple OSS Distributions #include <mach/mach_error.h> 6*fdd8201dSApple OSS Distributions #include <sys/sysctl.h> 7*fdd8201dSApple OSS Distributions #include <sys/wait.h> 8*fdd8201dSApple OSS Distributions #include <unistd.h> 9*fdd8201dSApple OSS Distributions 10*fdd8201dSApple OSS Distributions #include <darwintest.h> 11*fdd8201dSApple OSS Distributions #include <darwintest_utils.h> 12*fdd8201dSApple OSS Distributions 13*fdd8201dSApple OSS Distributions #include <xpc/private.h> 14*fdd8201dSApple OSS Distributions 15*fdd8201dSApple OSS Distributions T_GLOBAL_META(T_META_RUN_CONCURRENTLY(true), 16*fdd8201dSApple OSS Distributions T_META_RADAR_COMPONENT_NAME("xnu"), 17*fdd8201dSApple OSS Distributions T_META_RADAR_COMPONENT_VERSION("IPC"), 18*fdd8201dSApple OSS Distributions T_META_NAMESPACE("xnu.ipc")); 19*fdd8201dSApple OSS Distributions 20*fdd8201dSApple OSS Distributions struct test_msg { 21*fdd8201dSApple OSS Distributions mach_msg_header_t header; 22*fdd8201dSApple OSS Distributions mach_msg_trailer_t trailer; // subtract this when sending 23*fdd8201dSApple OSS Distributions }; 24*fdd8201dSApple OSS Distributions 25*fdd8201dSApple OSS Distributions T_DECL(bootstrap_mig_always_filtered, 26*fdd8201dSApple OSS Distributions "'MIG' messages to bootstrap ports from tasks with filtering should always be filtered", 27*fdd8201dSApple OSS Distributions T_META_ASROOT(true), T_META_REQUIRES_SYSCTL_EQ("kern.development", 1)) 28*fdd8201dSApple OSS Distributions { 29*fdd8201dSApple OSS Distributions int new_filter_flag = 1; 30*fdd8201dSApple OSS Distributions int rc = sysctlbyname("kern.task_set_filter_msg_flag", NULL, NULL, 31*fdd8201dSApple OSS Distributions &new_filter_flag, sizeof(new_filter_flag)); 32*fdd8201dSApple OSS Distributions T_ASSERT_POSIX_SUCCESS(rc, "sysctlbyname"); 33*fdd8201dSApple OSS Distributions 34*fdd8201dSApple OSS Distributions struct mach_service_port_info mspi = { 35*fdd8201dSApple OSS Distributions .mspi_domain_type = XPC_DOMAIN_PORT, 36*fdd8201dSApple OSS Distributions }; 37*fdd8201dSApple OSS Distributions strlcpy(mspi.mspi_string_name, "com.apple.xnu.test_bootstrap_msgfilter", 38*fdd8201dSApple OSS Distributions sizeof(mspi.mspi_string_name)); 39*fdd8201dSApple OSS Distributions 40*fdd8201dSApple OSS Distributions mach_port_options_t port_opts = { 41*fdd8201dSApple OSS Distributions .flags = MPO_SERVICE_PORT | 42*fdd8201dSApple OSS Distributions MPO_INSERT_SEND_RIGHT | 43*fdd8201dSApple OSS Distributions MPO_CONTEXT_AS_GUARD | 44*fdd8201dSApple OSS Distributions MPO_STRICT, 45*fdd8201dSApple OSS Distributions .service_port_info = &mspi, 46*fdd8201dSApple OSS Distributions }; 47*fdd8201dSApple OSS Distributions 48*fdd8201dSApple OSS Distributions int ctxobj = 0; 49*fdd8201dSApple OSS Distributions 50*fdd8201dSApple OSS Distributions mach_port_t test_bootstrap_port; 51*fdd8201dSApple OSS Distributions kern_return_t kr = mach_port_construct(mach_task_self(), &port_opts, 52*fdd8201dSApple OSS Distributions (uintptr_t)&ctxobj, &test_bootstrap_port); 53*fdd8201dSApple OSS Distributions T_ASSERT_MACH_SUCCESS(kr, "mach_port_construct"); 54*fdd8201dSApple OSS Distributions 55*fdd8201dSApple OSS Distributions // sending a valid 'XPC' msgid should succeed 56*fdd8201dSApple OSS Distributions 57*fdd8201dSApple OSS Distributions mach_msg_id_t permitted_xpc_msgid = 0x01000042; 58*fdd8201dSApple OSS Distributions 59*fdd8201dSApple OSS Distributions struct test_msg msg = { 60*fdd8201dSApple OSS Distributions .header = { 61*fdd8201dSApple OSS Distributions .msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0), 62*fdd8201dSApple OSS Distributions .msgh_size = offsetof(struct test_msg, trailer), 63*fdd8201dSApple OSS Distributions .msgh_remote_port = test_bootstrap_port, 64*fdd8201dSApple OSS Distributions .msgh_id = permitted_xpc_msgid, 65*fdd8201dSApple OSS Distributions }, 66*fdd8201dSApple OSS Distributions }; 67*fdd8201dSApple OSS Distributions 68*fdd8201dSApple OSS Distributions mach_msg_option_t msg_opts = MACH_SEND_MSG | MACH_RCV_MSG; 69*fdd8201dSApple OSS Distributions kr = mach_msg(&msg.header, msg_opts, msg.header.msgh_size, sizeof(msg), 70*fdd8201dSApple OSS Distributions test_bootstrap_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); 71*fdd8201dSApple OSS Distributions T_ASSERT_MACH_SUCCESS(kr, "send message with valid (XPC) message ID"); 72*fdd8201dSApple OSS Distributions 73*fdd8201dSApple OSS Distributions // sending a 'MIG' msgid (0x00xxxxxx) should fail, non-fatally 74*fdd8201dSApple OSS Distributions 75*fdd8201dSApple OSS Distributions mach_msg_id_t disallowed_mig_msgid = 0x00000042; 76*fdd8201dSApple OSS Distributions msg_opts |= MACH_SEND_FILTER_NONFATAL; 77*fdd8201dSApple OSS Distributions 78*fdd8201dSApple OSS Distributions msg = (struct test_msg){ 79*fdd8201dSApple OSS Distributions .header = { 80*fdd8201dSApple OSS Distributions .msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0), 81*fdd8201dSApple OSS Distributions .msgh_size = offsetof(struct test_msg, trailer), 82*fdd8201dSApple OSS Distributions .msgh_remote_port = test_bootstrap_port, 83*fdd8201dSApple OSS Distributions .msgh_id = disallowed_mig_msgid, 84*fdd8201dSApple OSS Distributions }, 85*fdd8201dSApple OSS Distributions }; 86*fdd8201dSApple OSS Distributions kr = mach_msg(&msg.header, msg_opts, msg.header.msgh_size, sizeof(msg), 87*fdd8201dSApple OSS Distributions test_bootstrap_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); 88*fdd8201dSApple OSS Distributions T_ASSERT_EQ(kr, MACH_SEND_MSG_FILTERED, "message should be filtered"); 89*fdd8201dSApple OSS Distributions } 90