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vfio: avoid possible overflow in vfio_iommu_type1_pin_pages

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commit 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yan Zhao 2020-04-08 03:12:34 -04:00 • committed by Greg Kroah-Hartman
commit 08e90b299d
1 changed files with 1 additions and 1 deletions
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drivers/vfio/vfio_iommu_type1.c
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@ -593,7 +593,7 @@ 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)