vfio/type1: silence integer overflow warning
I get a static checker warning about the potential integer overflow if we add "unmap->iova + unmap->size". The integer overflow isn't really harmful, but we may as well fix it. Also unmap->size gets truncated to size_t when we pass it to vfio_find_dma() so we could check for too high values of that as well. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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@ -767,6 +767,9 @@ static int vfio_dma_do_unmap(struct vfio_iommu *iommu,
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return -EINVAL;
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if (!unmap->size || unmap->size & mask)
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return -EINVAL;
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if (unmap->iova + unmap->size < unmap->iova ||
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unmap->size > SIZE_MAX)
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return -EINVAL;
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WARN_ON(mask & PAGE_MASK);
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again:
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