xnu-1228.3.13.tar.gz

[apple/xnu.git] / osfmk / ipc / ipc_object.c

diff --git a/osfmk/ipc/ipc_object.c b/osfmk/ipc/ipc_object.c
index 6abf8eecfdb2f665c35aa423dd2947ca1a3a235c..0ca7095eea61bdb45d2d6301cf71f71e0f55c6d1 100644 (file)
--- a/osfmk/ipc/ipc_object.c
+++ b/osfmk/ipc/ipc_object.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -53,6 +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) 2005-2006 SPARTA, Inc.
+ */
 /*
  */
 /*
@@ -73,6 +80,7 @@
 
 #include <kern/kern_types.h>
 #include <kern/misc_protos.h>
+#include <kern/ipc_kobject.h>
 
 #include <ipc/ipc_types.h>
 #include <ipc/port.h>
@@ -83,6 +91,9 @@
 #include <ipc/ipc_right.h>
 #include <ipc/ipc_notify.h>
 #include <ipc/ipc_pset.h>
+#include <ipc/ipc_labelh.h>
+
+#include <security/mac_mach_internal.h>
 
 zone_t ipc_object_zones[IOT_NUMBER];
 
@@ -334,6 +345,9 @@ ipc_object_alloc(
                ipc_port_t port = (ipc_port_t)object;
 
                bzero((char *)port, sizeof(*port));
+#if CONFIG_MACF_MACH
+               mac_port_label_init(&port->ip_label);
+#endif
        } else if (otype == IOT_PORT_SET) {
                ipc_pset_t pset = (ipc_pset_t)object;
 
@@ -402,6 +416,9 @@ ipc_object_alloc_name(
                ipc_port_t port = (ipc_port_t)object;
 
                bzero((char *)port, sizeof(*port));
+#if CONFIG_MACF_MACH
+               mac_port_label_init(&port->ip_label);
+#endif
        } else if (otype == IOT_PORT_SET) {
                ipc_pset_t pset = (ipc_pset_t)object;
 
@@ -978,7 +995,31 @@ ipc_object_rename(
        return kr;
 }
 
-#if    MACH_ASSERT
+/*
+ * Get a label out of a port, to be used by a kernel call
+ * that takes a security label as a parameter. In this case, we want
+ * to use the label stored in the label handle and not the label on its
+ * port.
+ *
+ * The port should be locked for this call. The lock protecting
+ * label handle contents should not be necessary, as they can only
+ * be modified when a label handle with one reference is a task label.
+ * User allocated label handles can never be modified.
+ */
+#if CONFIG_MACF_MACH
+struct label *io_getlabel (ipc_object_t objp)
+{
+       ipc_port_t port = (ipc_port_t)objp;
+
+       assert(io_otype(objp) == IOT_PORT);
+
+       if (ip_kotype(port) == IKOT_LABELH)
+               return &((ipc_labelh_t) port->ip_kobject)->lh_label;
+       else
+               return &port->ip_label;
+}
+#endif
+#if MACH_ASSERT || CONFIG_MACF_MACH
 /*
  *     Check whether the object is a port if so, free it.  But
  *     keep track of that fact.
@@ -995,16 +1036,20 @@ io_free(
 #if    MACH_ASSERT
                ipc_port_track_dealloc(port);
 #endif /* MACH_ASSERT */
+
+#if CONFIG_MACF_MACH
+               /* Port label should have been initialized after creation. */
+               mac_port_label_destroy(&port->ip_label);
+#endif   
        }
        zfree(ipc_object_zones[otype], object);
 }
-#endif /* MACH_ASSERT */
+#endif         /* MACH_ASSER || MAC */
 
 #include <mach_kdb.h>
 #if    MACH_KDB
 
 #include <ddb/db_output.h>
-#include <kern/ipc_kobject.h>
 
 #define        printf  kdbprintf 
 
@@ -1047,10 +1092,16 @@ const char *ikot_print_array[IKOT_MAX_TYPE] = {
        "(IOKIT_CONNECT)    ",
        "(IOKIT_OBJECT)     ",  /* 30 */
        "(UPL)              ",
-                                               /* << new entries here  */
+       "(MEM_OBJ_CONTROL)  ",
+#if CONFIG_MACF_MACH
+       "(LABELH)           ",
+#endif
+/*
+ * Add new entries here.
+ * Please keep in sync with kern/ipc_kobject.h
+ */
        "(UNKNOWN)          "   /* magic catchall       */
 };
-/* Please keep in sync with kern/ipc_kobject.h */
 
 void
 ipc_object_print(