| commit | 81a22eb0304d3a400d57fc1c2b6694a69f62c4c4 | |
| author | Alexander Duyck <alexander.h.duyck@linux.intel.com> | |
| Fri, 8 May 2020 17:40:06 +0000 (8 10:40 -0700) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Mon, 22 Jun 2020 07:33:08 +0000 (22 09:33 +0200) | ||
| tree | 9343a488af8232547ea251adc1620a0694f6213e | treesnapshot (tar.gz zip) |
| parent | 39b21b529fd986f124f683a61ff1f978a312df4d | commitdiff |
virtio-balloon: Disable free page reporting if page poison reporting is not enabled
commit fb69c2c896fc8289b0d9e2c0791472e7cd398bca upstream.
We should disable free page reporting if page poisoning is enabled but we
cannot report it via the balloon interface. This way we can avoid the
possibility of corrupting guest memory. Normally the page poisoning feature
should always be present when free page reporting is enabled on the
hypervisor, however this allows us to correctly handle a case of the
virtio-balloon device being possibly misconfigured.
Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host")
Cc: stable@vger.kernel.org
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Link: https://lore.kernel.org/r/20200508173732.17877.85060.stgit@localhost.localdomain
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fb69c2c896fc8289b0d9e2c0791472e7cd398bca upstream.
We should disable free page reporting if page poisoning is enabled but we
cannot report it via the balloon interface. This way we can avoid the
possibility of corrupting guest memory. Normally the page poisoning feature
should always be present when free page reporting is enabled on the
hypervisor, however this allows us to correctly handle a case of the
virtio-balloon device being possibly misconfigured.
Fixes: 5d757c8d518d ("virtio-balloon: add support for providing free page reports to host")
Cc: stable@vger.kernel.org
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Link: https://lore.kernel.org/r/20200508173732.17877.85060.stgit@localhost.localdomain
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/virtio/virtio_balloon.c | diffblobblamehistory |