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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 21 Jun 2017 18:51:31 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r320201 - head/sys/vm
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Author: kib
Date: Wed Jun 21 18:51:30 2017
New Revision: 320201
URL: https://svnweb.freebsd.org/changeset/base/320201

Log:
  Assert that the protection of a new map entry is a subset of the max
  protection.
  
  Noted and reviewed by:	alc
  Sponsored by:	The FreeBSD Foundation
  MFC after:	1 week

Modified:
  head/sys/vm/vm_map.c

Modified: head/sys/vm/vm_map.c
==============================================================================
--- head/sys/vm/vm_map.c	Wed Jun 21 18:28:37 2017	(r320200)
+++ head/sys/vm/vm_map.c	Wed Jun 21 18:51:30 2017	(r320201)
@@ -1190,6 +1190,8 @@ vm_map_insert(vm_map_t map, vm_object_t object, vm_oof
 	    ("vm_map_insert: kmem or kernel object and COW"));
 	KASSERT(object == NULL || (cow & MAP_NOFAULT) == 0,
 	    ("vm_map_insert: paradoxical MAP_NOFAULT request"));
+	KASSERT((prot & ~max) == 0,
+	    ("prot %#x is not subset of max_prot %#x", prot, max));
 
 	/*
 	 * Check that the start and end points are not bogus.