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Fix an off-by-one error in vm_map_pmap_enter().

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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@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
This commit is contained in:
Mark Johnston 2019-12-04 19:46:48 +00:00
parent b75c4efcd2
commit ed2f945a39
1 changed files with 1 additions and 1 deletions
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2
sys/vm/vm_map.c
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@ -2467,7 +2467,7 @@ vm_map_pmap_enter(vm_map_t map, vm_offset_t addr, vm_prot_t prot,
psize = atop(size);
if (psize + pindex > object->size) {
if (object->size < pindex) {
if (pindex >= object->size) {
VM_OBJECT_RUNLOCK(object);
return;
}