xnu-792.12.6.tar.gz

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

diff --git a/osfmk/ipc/mach_port.c b/osfmk/ipc/mach_port.c
index f9dc656fc58a2e9449aa02c6bdce04cf20f883bc..934e3e1d75e94af039624b007bc469b5141c0940 100644 (file)
--- a/osfmk/ipc/mach_port.c
+++ b/osfmk/ipc/mach_port.c
@@ -1,23 +1,31 @@
 /*
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_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 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.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ * 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.
+ *
+ * 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -623,12 +631,16 @@ mach_port_allocate_full(
        }
 
        if (qosp->prealloc) {
-               mach_msg_size_t size = qosp->len + MAX_TRAILER_SIZE;
-               if (right != MACH_PORT_RIGHT_RECEIVE)
-                       return (KERN_INVALID_VALUE);
-               kmsg = (ipc_kmsg_t)ipc_kmsg_alloc(size);
-               if (kmsg == IKM_NULL)
-                       return (KERN_RESOURCE_SHORTAGE);
+               if (qosp->len > MACH_MSG_SIZE_MAX - MAX_TRAILER_SIZE) {
+                       return KERN_RESOURCE_SHORTAGE;
+               } else {
+                       mach_msg_size_t size = qosp->len + MAX_TRAILER_SIZE;
+                       if (right != MACH_PORT_RIGHT_RECEIVE)
+                               return (KERN_INVALID_VALUE);
+                       kmsg = (ipc_kmsg_t)ipc_kmsg_alloc(size);
+                       if (kmsg == IKM_NULL)
+                               return (KERN_RESOURCE_SHORTAGE);
+               }
        }
 
        switch (right) {