svn commit: r355399 - head/sys/vm

[Mark Johnston]

Author: markj
Date: Wed Dec  4 19:46:48 2019
New Revision: 355399
URL: https://svnweb.freebsd.org/changeset/base/355399

Log:
  Fix an off-by-one error in vm_map_pmap_enter().
  
  If the starting pindex is equal to object->size, there is nothing to do.
  This was harmless since the rest of vm_map_pmap_enter() has no effect
  when psize == 0.
  
  Submitted by:	Wuyang Chung <wuyang.chung1 at gmail.com>
  Reviewed by:	alc, dougm, kib
  MFC after:	1 week
  Github PR:	https://github.com/freebsd/freebsd/pull/417
  Differential Revision:	https://reviews.freebsd.org/D22678

Modified:
  head/sys/vm/vm_map.c

Modified: head/sys/vm/vm_map.c
==============================================================================
--- head/sys/vm/vm_map.c	Wed Dec  4 18:40:05 2019	(r355398)
+++ head/sys/vm/vm_map.c	Wed Dec  4 19:46:48 2019	(r355399)
@@ -2467,7 +2467,7 @@ vm_map_pmap_enter(vm_map_t map, vm_offset_t addr, vm_p
 
 	psize = atop(size);
 	if (psize + pindex > object->size) {
-		if (object->size < pindex) {
+		if (pindex >= object->size) {
 			VM_OBJECT_RUNLOCK(object);
 			return;
 		}