Commit 6e9826e7 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin

virtio_balloon: prevent pfn array overflow

Make sure, at build time, that pfn array is big enough to hold a single
page.  It happens to be true since the PAGE_SHIFT value at the moment is
20, which is 1M - exactly 256 4K balloon pages.
Signed-off-by: default avatarMichael S. Tsirkin <[email protected]>
Reviewed-by: David Hildenbrand's avatarDavid Hildenbrand <[email protected]>
parent 782e067d
......@@ -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 at this page.
* Note that the first pfn points at start of the page.
......
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