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Date: Thu, 7 May 2020 10:26:43 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Yan Zhao <yan.y.zhao@...el.com>, Alex Williamson <alex.williamson@...hat.com>, Sasha Levin <sashal@...nel.org>, kvm@...r.kernel.org Subject: [PATCH AUTOSEL 5.6 07/50] vfio: avoid possible overflow in vfio_iommu_type1_pin_pages From: Yan Zhao <yan.y.zhao@...el.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.zhao@...el.com> Signed-off-by: Alex Williamson <alex.williamson@...hat.com> Signed-off-by: Sasha Levin <sashal@...nel.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
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