From c818344265db400757911eb44ece0aacefef6bfe Mon Sep 17 00:00:00 2001 From: Konstantin Khlebnikov Date: Wed, 20 Aug 2014 18:37:34 +0400 Subject: [PATCH] kvm tools: balloon: fix overflow in PFN to address conversion Fix trivial overflow of u32 value Signed-off-by: Konstantin Khlebnikov Signed-off-by: Pekka Enberg --- virtio/balloon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/virtio/balloon.c b/virtio/balloon.c index f7dfb0b..84c4bb0 100644 --- a/virtio/balloon.c +++ b/virtio/balloon.c @@ -64,7 +64,7 @@ static bool virtio_bln_do_io_request(struct kvm *kvm, struct bln_dev *bdev, stru for (i = 0 ; i < len ; i++) { void *guest_ptr; - guest_ptr = guest_flat_to_host(kvm, ptrs[i] << VIRTIO_BALLOON_PFN_SHIFT); + guest_ptr = guest_flat_to_host(kvm, (u64)ptrs[i] << VIRTIO_BALLOON_PFN_SHIFT); if (queue == &bdev->vqs[VIRTIO_BLN_INFLATE]) { madvise(guest_ptr, 1 << VIRTIO_BALLOON_PFN_SHIFT, MADV_DONTNEED); bdev->config.actual++;