[PATCH v14 01/16] iommu/iova: fix __alloc_and_insert_iova_range

[Eric Auger]

Fix the size check within start_pfn and limit_pfn.

Signed-off-by: Eric Auger <eric.auger at redhat.com>

---

the issue was observed when playing with 1 page iova domain with
higher iova reserved.
---
 drivers/iommu/iova.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index e23001b..ee29dbf 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -147,7 +147,7 @@ move_left:
 	if (!curr) {
 		if (size_aligned)
 			pad_size = iova_get_pad_size(size, limit_pfn);
-		if ((iovad->start_pfn + size + pad_size) > limit_pfn) {
+		if ((iovad->start_pfn + size + pad_size - 1) > limit_pfn) {
 			spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
 			return -ENOMEM;
 		}
-- 
1.9.1