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2020 Feb 14
0
[PATCH AUTOSEL 5.5 538/542] virtio_balloon: prevent pfn array overflow
...om> Reviewed-by: David Hildenbrand <david at redhat.com> Signed-off-by: Sasha Levin <sashal at kernel.org> --- drivers/virtio/virtio_balloon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 7e5d84caeb940..7bfe365d93720 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -158,6 +158,8 @@ static void set_page_pfns(struct virtio_balloon *vb, { unsigned int i; + BUILD_BUG_ON(VIRTIO_BALLOON_PAGES_PER_PAGE > VIRTIO_BALLOON_ARRAY_PFNS_MAX); + /* * Set balloon pfns pointing...