[PATCH AUTOSEL 5.6 07/50] vfio: avoid possible overflow in vfio_iommu_type1_pin_pages

[Sasha Levin]

From: Yan Zhao <yan.y.z...@intel.com>

[ Upstream commit 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 ]

add parentheses to avoid possible vaddr overflow.

Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Signed-off-by: Yan Zhao <yan.y.z...@intel.com>
Signed-off-by: Alex Williamson <alex.william...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/vfio/vfio_iommu_type1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index a177bf2c66834..ec9be79ba2d79 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -554,7 +554,7 @@ static int vfio_iommu_type1_pin_pages(void *iommu_data,
                        continue;
                }
 
-               remote_vaddr = dma->vaddr + iova - dma->iova;
+               remote_vaddr = dma->vaddr + (iova - dma->iova);
                ret = vfio_pin_page_external(dma, remote_vaddr, &phys_pfn[i],
                                             do_accounting);
                if (ret)
-- 
2.20.1