tree 4fb7182507635bf2d9726fbca610430583b74d2e
parent 3edf85591fb5d2738ed5daa3c8cc16332bb87eb9
author Michael S. Tsirkin <mst@redhat.com> 1580974858 -0500
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1582529694 +0100

virtio_balloon: prevent pfn array overflow

[ Upstream commit 6e9826e77249355c09db6ba41cd3f84e89f4b614 ]

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: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>