This is a note to let you know that I've just added the patch titled vfio: avoid possible overflow in vfio_iommu_type1_pin_pages to the 5.6-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: vfio-avoid-possible-overflow-in-vfio_iommu_type1_pin_pages.patch and it can be found in the queue-5.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 Mon Sep 17 00:00:00 2001 From: Yan Zhao <yan.y.zhao@xxxxxxxxx> Date: Wed, 8 Apr 2020 03:12:34 -0400 Subject: vfio: avoid possible overflow in vfio_iommu_type1_pin_pages From: Yan Zhao <yan.y.zhao@xxxxxxxxx> commit 0ea971f8dcd6dee78a9a30ea70227cf305f11ff7 upstream. 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@xxxxxxxxx> Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/vfio/vfio_iommu_type1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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(vo 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) Patches currently in stable-queue which might be from yan.y.zhao@xxxxxxxxx are queue-5.6/vfio-avoid-possible-overflow-in-vfio_iommu_type1_pin_pages.patch