From: Konstantin Khlebnikov <koct9i@gmail.com>
To: Pekka Enberg <penberg@kernel.org>, Sasha Levin <sasha.levin@oracle.com>
Cc: kvm@vger.kernel.org
Subject: [PATCH] kvm tools: balloon: fix overflow in PFN to address conversion
Date: Wed, 20 Aug 2014 18:37:34 +0400 [thread overview]
Message-ID: <20140820143734.3909.97343.stgit@buzz> (raw)
Fix trivial overflow of u32 value
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
---
tools/kvm/virtio/balloon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/kvm/virtio/balloon.c b/tools/kvm/virtio/balloon.c
index f7dfb0b..84c4bb0 100644
--- a/tools/kvm/virtio/balloon.c
+++ b/tools/kvm/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++;
reply other threads:[~2014-08-20 14:37 UTC|newest]
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