From: Yan Zhao <yan.y.zhao@intel.com>
To: alex.williamson@redhat.com, cohuck@redhat.com
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Yan Zhao <yan.y.zhao@intel.com>
Subject: [PATCH] vfio: avoid possible overflow in vfio_iommu_type1_pin_pages
Date: Wed, 8 Apr 2020 03:12:34 -0400 [thread overview]
Message-ID: <20200408071234.25702-1-yan.y.zhao@intel.com> (raw)
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@intel.com>
---
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 85b32c325282..3aefcc8e2933 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)
--
2.17.1
reply other threads:[~2020-04-08 7:22 UTC|newest]
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