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(parent: 3edf855) | patch
virtio_balloon: prevent pfn array overflow
authorMichael S. Tsirkin <mst@redhat.com>
Thu, 6 Feb 2020 07:40:58 +0000 (02:40 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 24 Feb 2020 07:34:54 +0000 (08:34 +0100)
commit55c549ea283cc3d681b41e9dd42b969cb480eeb9
tree4fb7182507635bf2d9726fbca610430583b74d2etree | snapshot
parent3edf85591fb5d2738ed5daa3c8cc16332bb87eb9commit | diff
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>
drivers/virtio/virtio_balloon.c diff | blob | history
Domain: System / Kernel;