/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
+/*
+ * NOTICE: This file was modified by McAfee Research in 2004 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ * Copyright (c) 2005 SPARTA, Inc.
+ */
/*
*/
/*
#include <mach_debug.h>
#include <mach_ipc_test.h>
-#include <mach_machine_routines.h>
-#include <norma_task.h>
-#include <mach_rt.h>
-#include <platforms.h>
-
#include <mach/mig.h>
#include <mach/port.h>
#include <mach/kern_return.h>
#include <mach/mig_errors.h>
#include <mach/notify.h>
#include <mach/ndr.h>
+#include <mach/vm_param.h>
#include <mach/mach_vm_server.h>
#include <mach/mach_port_server.h>
#include <mach/host_security_server.h>
#include <mach/clock_server.h>
#include <mach/clock_priv_server.h>
-#include <mach/ledger_server.h>
#include <mach/lock_set_server.h>
-#include <default_pager/default_pager_object_server.h>
-#include <mach/memory_object_server.h>
#include <mach/memory_object_control_server.h>
#include <mach/memory_object_default_server.h>
-#include <mach/memory_object_name_server.h>
#include <mach/processor_server.h>
#include <mach/processor_set_server.h>
-#include <mach/semaphore_server.h>
#include <mach/task_server.h>
-#include <mach/vm_map_server.h>
+#include <mach/mach_voucher_server.h>
+#include <mach/mach_voucher_attr_control_server.h>
+#ifdef VM32_SUPPORT
+#include <mach/vm32_map_server.h>
+#endif
#include <mach/thread_act_server.h>
#include <device/device_types.h>
#include <UserNotification/UNDReplyServer.h>
+#if CONFIG_AUDIT
+#include <kern/audit_sessionport.h>
+#endif
+
#if MACH_MACHINE_ROUTINES
#include <machine/machine_routines.h>
#endif /* MACH_MACHINE_ROUTINES */
#include <kern/ipc_tt.h>
#include <kern/ipc_mig.h>
+#include <kern/ipc_misc.h>
#include <kern/ipc_kobject.h>
#include <kern/host_notify.h>
#include <kern/mk_timer.h>
#include <kern/misc_protos.h>
#include <ipc/ipc_kmsg.h>
#include <ipc/ipc_port.h>
+#include <ipc/ipc_voucher.h>
+#include <kern/sync_sema.h>
#include <kern/counters.h>
+#include <kern/work_interval.h>
-#include <vm/vm_shared_memory_server.h>
#include <vm/vm_protos.h>
+#include <security/mac_mach_internal.h>
+
+extern char *proc_name_address(void *p);
+extern int proc_pid(void *p);
+
/*
* Routine: ipc_kobject_notify
* Purpose:
#endif
} mig_hash_t;
-#define MAX_MIG_ENTRIES 1024
+#define MAX_MIG_ENTRIES 1031
#define MIG_HASH(x) (x)
#ifndef max
#define max(a,b) (((a) > (b)) ? (a) : (b))
#endif /* max */
-mig_hash_t mig_buckets[MAX_MIG_ENTRIES];
-int mig_table_max_displ;
-mach_msg_size_t mig_reply_size;
-
+static mig_hash_t mig_buckets[MAX_MIG_ENTRIES];
+static int mig_table_max_displ;
+static mach_msg_size_t mig_reply_size = sizeof(mig_reply_error_t);
(const struct mig_subsystem *)&processor_subsystem,
(const struct mig_subsystem *)&processor_set_subsystem,
(const struct mig_subsystem *)&is_iokit_subsystem,
- (const struct mig_subsystem *)&memory_object_name_subsystem,
(const struct mig_subsystem *)&lock_set_subsystem,
- (const struct mig_subsystem *)&ledger_subsystem,
- (const struct mig_subsystem *)&semaphore_subsystem,
(const struct mig_subsystem *)&task_subsystem,
(const struct mig_subsystem *)&thread_act_subsystem,
- (const struct mig_subsystem *)&vm_map_subsystem,
+#ifdef VM32_SUPPORT
+ (const struct mig_subsystem *)&vm32_map_subsystem,
+#endif
(const struct mig_subsystem *)&UNDReply_subsystem,
- (const struct mig_subsystem *)&default_pager_object_subsystem,
+ (const struct mig_subsystem *)&mach_voucher_subsystem,
+ (const struct mig_subsystem *)&mach_voucher_attr_control_subsystem,
#if XK_PROXY
(const struct mig_subsystem *)&do_uproxy_xk_uproxy_subsystem,
range = mig_e[i]->end - mig_e[i]->start;
if (!mig_e[i]->start || range < 0)
panic("the msgh_ids in mig_e[] aren't valid!");
- mig_reply_size = max(mig_reply_size, mig_e[i]->maxsize);
for (j = 0; j < range; j++) {
if (mig_e[i]->routine[j].stub_routine) {
nentry = j + mig_e[i]->start;
for (pos = MIG_HASH(nentry) % MAX_MIG_ENTRIES, howmany = 1;
mig_buckets[pos].num;
- pos = ++pos % MAX_MIG_ENTRIES, howmany++) {
+ pos++, pos = pos % MAX_MIG_ENTRIES, howmany++) {
if (mig_buckets[pos].num == nentry) {
printf("message id = %d\n", nentry);
panic("multiple entries with the same msgh_id");
ipc_kmsg_t
ipc_kobject_server(
- ipc_kmsg_t request)
+ ipc_kmsg_t request,
+ mach_msg_option_t __unused option)
{
mach_msg_size_t reply_size;
ipc_kmsg_t reply;
kern_return_t kr;
ipc_port_t *destp;
+ ipc_port_t replyp = IPC_PORT_NULL;
mach_msg_format_0_trailer_t *trailer;
- register mig_hash_t *ptr;
+ mig_hash_t *ptr;
+ task_t task = TASK_NULL;
+ uint32_t exec_token;
+ boolean_t exec_token_changed = FALSE;
/*
* Find out corresponding mig_hash entry if any
*/
{
- register int key = request->ikm_header->msgh_id;
- register int i = MIG_HASH(key);
- register int max_iter = mig_table_max_displ;
-
- do
+ int key = request->ikm_header->msgh_id;
+ unsigned int i = (unsigned int)MIG_HASH(key);
+ int max_iter = mig_table_max_displ;
+
+ do {
ptr = &mig_buckets[i++ % MAX_MIG_ENTRIES];
- while (key != ptr->num && ptr->num && --max_iter);
+ } while (key != ptr->num && ptr->num && --max_iter);
if (!ptr->routine || key != ptr->num) {
ptr = (mig_hash_t *)0;
if (reply == IKM_NULL) {
printf("ipc_kobject_server: dropping request\n");
+ ipc_kmsg_trace_send(request, option);
ipc_kmsg_destroy(request);
return IKM_NULL;
}
#define InP ((mach_msg_header_t *) request->ikm_header)
#define OutP ((mig_reply_error_t *) reply->ikm_header)
+ /*
+ * MIG should really assure no data leakage -
+ * but until it does, pessimistically zero the
+ * whole reply buffer.
+ */
+ bzero((void *)OutP, reply_size);
+
OutP->NDR = NDR_record;
OutP->Head.msgh_size = sizeof(mig_reply_error_t);
OutP->Head.msgh_bits =
- MACH_MSGH_BITS(MACH_MSGH_BITS_LOCAL(InP->msgh_bits), 0);
+ MACH_MSGH_BITS_SET(MACH_MSGH_BITS_LOCAL(InP->msgh_bits), 0, 0, 0);
OutP->Head.msgh_remote_port = InP->msgh_local_port;
- OutP->Head.msgh_local_port = MACH_PORT_NULL;
+ OutP->Head.msgh_local_port = MACH_PORT_NULL;
+ OutP->Head.msgh_voucher_port = MACH_PORT_NULL;
OutP->Head.msgh_id = InP->msgh_id + 100;
#undef InP
* Find the routine to call, and call it
* to perform the kernel function
*/
+ ipc_kmsg_trace_send(request, option);
{
- if (ptr) {
+ if (ptr) {
+ /*
+ * Check if the port is a task port, if its a task port then
+ * snapshot the task exec token before the mig routine call.
+ */
+ ipc_port_t port = request->ikm_header->msgh_remote_port;
+ if (IP_VALID(port) && ip_kotype(port) == IKOT_TASK) {
+ task = convert_port_to_task_with_exec_token(port, &exec_token);
+ }
+
(*ptr->routine)(request->ikm_header, reply->ikm_header);
+
+ /* Check if the exec token changed during the mig routine */
+ if (task != TASK_NULL) {
+ if (exec_token != task->exec_token) {
+ exec_token_changed = TRUE;
+ }
+ task_deallocate(task);
+ }
+
kernel_task->messages_received++;
}
else {
if (!ipc_kobject_notify(request->ikm_header, reply->ikm_header)){
-#if MACH_IPC_TEST
+#if DEVELOPMENT || DEBUG
printf("ipc_kobject_server: bogus kernel message, id=%d\n",
request->ikm_header->msgh_id);
-#endif /* MACH_IPC_TEST */
+#endif /* DEVELOPMENT || DEBUG */
_MIG_MSGID_INVALID(request->ikm_header->msgh_id);
((mig_reply_error_t *) reply->ikm_header)->RetCode
}
*destp = IP_NULL;
+ /*
+ * Destroy voucher. The kernel MIG servers never take ownership
+ * of vouchers sent in messages. Swallow any such rights here.
+ */
+ if (IP_VALID(request->ikm_voucher)) {
+ assert(MACH_MSG_TYPE_PORT_SEND ==
+ MACH_MSGH_BITS_VOUCHER(request->ikm_header->msgh_bits));
+ ipc_port_release_send(request->ikm_voucher);
+ request->ikm_voucher = IP_NULL;
+ }
+
if (!(reply->ikm_header->msgh_bits & MACH_MSGH_BITS_COMPLEX) &&
((mig_reply_error_t *) reply->ikm_header)->RetCode != KERN_SUCCESS)
kr = ((mig_reply_error_t *) reply->ikm_header)->RetCode;
ipc_kmsg_destroy(request);
}
+ replyp = (ipc_port_t)reply->ikm_header->msgh_remote_port;
+
if (kr == MIG_NO_REPLY) {
/*
* The server function will send a reply message
ipc_kmsg_free(reply);
return IKM_NULL;
- } else if (!IP_VALID((ipc_port_t)reply->ikm_header->msgh_remote_port)) {
+ } else if (!IP_VALID(replyp)) {
/*
* Can't queue the reply message if the destination
* (the reply port) isn't valid.
ipc_kmsg_destroy(reply);
+ return IKM_NULL;
+ } else if (replyp->ip_receiver == ipc_space_kernel) {
+ /*
+ * Don't send replies to kobject kernel ports
+ */
+#if DEVELOPMENT || DEBUG
+ printf("%s: refusing to send reply to kobject %d port (id:%d)\n",
+ __func__, ip_kotype(replyp),
+ request->ikm_header->msgh_id);
+#endif /* DEVELOPMENT || DEBUG */
+ ipc_kmsg_destroy(reply);
return IKM_NULL;
}
+ /* Fail the MIG call if the task exec token changed during the call */
+ if (kr == KERN_SUCCESS && exec_token_changed) {
+ /*
+ * Create a new reply msg with error and destroy the old reply msg.
+ */
+ ipc_kmsg_t new_reply = ipc_kmsg_alloc(reply_size);
+
+ if (new_reply == IKM_NULL) {
+ printf("ipc_kobject_server: dropping request\n");
+ ipc_kmsg_destroy(reply);
+ return IKM_NULL;
+ }
+ /*
+ * Initialize the new reply message.
+ */
+ {
+#define OutP_new ((mig_reply_error_t *) new_reply->ikm_header)
+#define OutP_old ((mig_reply_error_t *) reply->ikm_header)
+
+ bzero((void *)OutP_new, reply_size);
+
+ OutP_new->NDR = OutP_old->NDR;
+ OutP_new->Head.msgh_size = sizeof(mig_reply_error_t);
+ OutP_new->Head.msgh_bits = OutP_old->Head.msgh_bits & ~MACH_MSGH_BITS_COMPLEX;
+ OutP_new->Head.msgh_remote_port = OutP_old->Head.msgh_remote_port;
+ OutP_new->Head.msgh_local_port = MACH_PORT_NULL;
+ OutP_new->Head.msgh_voucher_port = MACH_PORT_NULL;
+ OutP_new->Head.msgh_id = OutP_old->Head.msgh_id;
+
+ /* Set the error as KERN_INVALID_TASK */
+ OutP_new->RetCode = KERN_INVALID_TASK;
+
+#undef OutP_new
+#undef OutP_old
+ }
+
+ /*
+ * Destroy everything in reply except the reply port right,
+ * which is needed in the new reply message.
+ */
+ reply->ikm_header->msgh_remote_port = MACH_PORT_NULL;
+ ipc_kmsg_destroy(reply);
+
+ reply = new_reply;
+ }
+
trailer = (mach_msg_format_0_trailer_t *)
((vm_offset_t)reply->ikm_header + (int)reply->ikm_header->msgh_size);
mach_msg_header_t *request_header,
mach_msg_header_t *reply_header)
{
+ mach_msg_max_trailer_t * trailer;
ipc_port_t port = (ipc_port_t) request_header->msgh_remote_port;
((mig_reply_error_t *) reply_header)->RetCode = MIG_NO_REPLY;
+
+ trailer = (mach_msg_max_trailer_t *)
+ ((vm_offset_t)request_header + request_header->msgh_size);
+
+ /*
+ * The kobject notification is privileged and can change the
+ * refcount on kernel-internal objects - make sure
+ * that the message wasn't faked!
+ */
+ if (0 != bcmp(&trailer->msgh_audit, &KERNEL_AUDIT_TOKEN,
+ sizeof(trailer->msgh_audit))) {
+ return FALSE;
+ }
+ if (0 != bcmp(&trailer->msgh_sender, &KERNEL_SECURITY_TOKEN,
+ sizeof(trailer->msgh_sender))) {
+ return FALSE;
+ }
+
switch (request_header->msgh_id) {
case MACH_NOTIFY_NO_SENDERS:
- if(ip_kotype(port) == IKOT_NAMED_ENTRY) {
- ip_lock(port);
-
- /*
- * Bring the sequence number and mscount in
- * line with ipc_port_destroy assertion.
- */
- port->ip_mscount = 0;
- port->ip_messages.imq_seqno = 0;
- ipc_port_destroy(port); /* releases lock */
- return TRUE;
- }
- if (ip_kotype(port) == IKOT_UPL) {
- upl_no_senders(
- request_header->msgh_remote_port,
- (mach_port_mscount_t)
- ((mach_no_senders_notification_t *)
- request_header)->not_count);
- (ipc_port_t)reply_header->msgh_remote_port
- = MACH_PORT_NULL;
- return TRUE;
- }
+ switch (ip_kotype(port)) {
+ case IKOT_VOUCHER:
+ ipc_voucher_notify(request_header);
+ return TRUE;
+
+ case IKOT_VOUCHER_ATTR_CONTROL:
+ ipc_voucher_attr_control_notify(request_header);
+ return TRUE;
+
+ case IKOT_SEMAPHORE:
+ semaphore_notify(request_header);
+ return TRUE;
+
+ case IKOT_TASK:
+ task_port_notify(request_header);
+ return TRUE;
- break;
+ case IKOT_NAMED_ENTRY:
+ ip_lock(port);
+
+ /*
+ * Bring the sequence number and mscount in
+ * line with ipc_port_destroy assertion.
+ */
+ port->ip_mscount = 0;
+ port->ip_messages.imq_seqno = 0;
+ ipc_port_destroy(port); /* releases lock */
+ return TRUE;
+
+ case IKOT_UPL:
+ upl_no_senders(
+ request_header->msgh_remote_port,
+ (mach_port_mscount_t)
+ ((mach_no_senders_notification_t *)
+ request_header)->not_count);
+ reply_header->msgh_remote_port = MACH_PORT_NULL;
+ return TRUE;
+
+#if CONFIG_AUDIT
+ case IKOT_AU_SESSIONPORT:
+ audit_session_nosenders(request_header);
+ return TRUE;
+#endif
+ case IKOT_FILEPORT:
+ fileport_notify(request_header);
+ return TRUE;
+
+ case IKOT_WORK_INTERVAL:
+ work_interval_port_notify(request_header);
+ return TRUE;
+
+ }
+ break;
case MACH_NOTIFY_PORT_DELETED:
case MACH_NOTIFY_PORT_DESTROYED:
return iokit_notify(request_header);
}
#endif
+ case IKOT_TASK_RESUME:
+ {
+ return task_suspension_notify(request_header);
+ }
+
default:
return FALSE;
}
}
-
-
-
-#include <mach_kdb.h>
-#if MACH_COUNTERS && MACH_KDB
-
-#include <ddb/db_output.h>
-#include <ddb/db_sym.h>
-
-#define printf kdbprintf
-
-extern void kobjserver_stats(void);
-extern void bucket_stats_print(mig_hash_t *bucket);
-
-extern void kobjserver_stats_clear(void);
-
-
-void
-kobjserver_stats_clear(void)
-{
- int i;
- for (i = 0; i < MAX_MIG_ENTRIES; i++) {
- mig_buckets[i].callcount = 0;
- }
-}
-
-void
-kobjserver_stats(void)
-{
- register unsigned int i, n = sizeof(mig_e)/sizeof(struct mig_subsystem);
- register unsigned int howmany;
- register mach_msg_id_t j, pos, nentry, range;
-
- db_printf("Kobject server call counts:\n");
- for (i = 0; i < n; i++) {
- db_printf(" ");
- db_printsym((vm_offset_t)mig_e[i], DB_STGY_ANY);
- db_printf(":\n");
- range = mig_e[i]->end - mig_e[i]->start;
- if (!mig_e[i]->start || range < 0) continue;
-
- for (j = 0; j < range; j++) {
- nentry = j + mig_e[i]->start;
- for (pos = MIG_HASH(nentry) % MAX_MIG_ENTRIES, howmany = 1;
- mig_buckets[pos].num;
- pos = ++pos % MAX_MIG_ENTRIES, howmany++) {
- if (mig_buckets[pos].num == nentry)
- bucket_stats_print(&mig_buckets[pos]);
- }
- }
- }
-}
-
-void
-bucket_stats_print(mig_hash_t *bucket)
-{
- if (bucket->callcount) {
- db_printf(" ");
- db_printsym((vm_offset_t)bucket->routine, DB_STGY_ANY);
- db_printf(" (%d):\t%d\n", bucket->num, bucket->callcount);
- }
-}
-
-
-#endif /* MACH_COUNTERS && MACH_KDB */
projects / apple / xnu.git / blobdiff