X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/91447636331957f3d9b5ca5b508f07c526b0074d..3e170ce000f1506b7b5d2c5c7faec85ceabb573d:/osfmk/kern/ipc_kobject.c

diff --git a/osfmk/kern/ipc_kobject.c b/osfmk/kern/ipc_kobject.c
index 62230a676..1789ae5f6 100644
--- a/osfmk/kern/ipc_kobject.c
+++ b/osfmk/kern/ipc_kobject.c
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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. 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.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * 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@
@@ -47,6 +53,13 @@
  * 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.
+ */
 /*
  */
 /*
@@ -59,10 +72,7 @@
 
 #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>
@@ -71,6 +81,7 @@
 #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>
@@ -79,18 +90,19 @@
 #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>
+#if VM32_SUPPORT
+#include <mach/vm32_map_server.h>
+#endif
 #include <mach/thread_act_server.h>
 
 #include <device/device_types.h>
@@ -98,6 +110,10 @@
 
 #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 */
@@ -107,17 +123,24 @@
 
 #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 <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:
@@ -137,17 +160,16 @@ typedef struct {
 #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);
 
 
 
@@ -162,15 +184,16 @@ const struct mig_subsystem *mig_e[] = {
         (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,
+#if 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,
@@ -194,7 +217,6 @@ mig_init(void)
 	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) { 
@@ -202,7 +224,7 @@ mig_init(void)
 	    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");
@@ -287,13 +309,21 @@ ipc_kobject_server(
 #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
@@ -352,6 +382,17 @@ ipc_kobject_server(
 	}
 	*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;
@@ -492,29 +533,49 @@ ipc_kobject_notify(
 	((mig_reply_error_t *) reply_header)->RetCode = MIG_NO_REPLY;
 	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_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;
+			}
 	  	   break;
 
 		case MACH_NOTIFY_PORT_DELETED:
@@ -536,72 +597,12 @@ ipc_kobject_notify(
                 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 */