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vfio: avoid possible overflow in vfio_iommu_type1_pin_pages

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add parentheses to avoid possible vaddr overflow.

Fixes: a54eb55045 ("vfio iommu type1: Add support for mediated devices")
Signed-off-by: Yan Zhao <yan.y.zhao@intel.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yan Zhao
2020-04-08 03:12:34 -04:00
committed by Alex Williamson
parent 205323b8ce
commit 0ea971f8dc
1 changed files with 1 additions and 1 deletions
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2
drivers/vfio/vfio_iommu_type1.c
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@@ -555,7 +555,7 @@ static int vfio_iommu_type1_pin_pages(void *iommu_data,
continue; 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], ret = vfio_pin_page_external(dma, remote_vaddr, &phys_pfn[i],
do_accounting); do_accounting);
if (ret) if (ret)