D30280.diff
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D30280.diff
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	diff --git a/sys/kern/subr_rman.c b/sys/kern/subr_rman.c
	--- a/sys/kern/subr_rman.c
	+++ b/sys/kern/subr_rman.c
	@@ -445,6 +445,8 @@
	"length %#jx, flags %x, device %s\n", rm->rm_descr, start, end,
	count, flags,
	dev == NULL ? "<null>" : device_get_nameunit(dev)));
	+ KASSERT(count != 0, ("%s: attempted to allocate an empty range",
	+ __func__));
	KASSERT((flags & RF_FIRSTSHARE) == 0,
	("invalid flags %#x", flags));
	new_rflags = (flags & ~RF_FIRSTSHARE) \| RF_ALLOCATED;
	@@ -520,7 +522,7 @@
	DPRINTF(("truncated region: [%#jx, %#jx]; size %#jx (requested %#jx)\n",
	rstart, rend, (rend - rstart + 1), count));

	- if ((rend - rstart + 1) >= count) {
	+ if ((rend - rstart) >= (count - 1)) {
	DPRINTF(("candidate region: [%#jx, %#jx], size %#jx\n",
	rstart, rend, (rend - rstart + 1)));
	if ((s->r_end - s->r_start + 1) == count) {