From 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 Mon Sep 17 00:00:00 2001 From: Yan Zhao Date: Wed, 8 Apr 2020 03:12:34 -0400 Subject: [PATCH] vfio: avoid possible overflow in vfio_iommu_type1_pin_pages add parentheses to avoid possible vaddr overflow. Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices") Signed-off-by: Yan Zhao Signed-off-by: Alex Williamson --- 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 aa501e826e70..fbc58284b333 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -555,7 +555,7 @@ 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)