D37273.diff
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	diff --git a/sys/amd64/vmm/vmm_dev.c b/sys/amd64/vmm/vmm_dev.c
	--- a/sys/amd64/vmm/vmm_dev.c
	+++ b/sys/amd64/vmm/vmm_dev.c
	@@ -1262,15 +1262,13 @@
	KASSERT(error == 0 && !sysmem && *objp != NULL,
	("%s: invalid devmem segment %d", __func__, dsc->segid));

	+ if (seglen >= last)
	+ vm_object_reference(*objp);
	+ else
	+ error = EINVAL;

	vm_unlock_memsegs(dsc->sc->vm);
	-
	- if (seglen >= last) {
	- vm_object_reference(*objp);
	- return (0);
	- } else {
	- return (EINVAL);
	- }
	+ return (error);
	}

	static struct cdevsw devmemsw = {