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2020 Feb 14
0
[PATCH AUTOSEL 5.5 538/542] virtio_balloon: prevent pfn array overflow
...mst at redhat.com>
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...