diff options
| author | Daniel Verkamp <dverkamp@chromium.org> | 2020-01-03 10:40:43 -0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-02-06 03:40:26 -0500 |
| commit | 5790b53390e18fdd21e70776e46d058c05eda2f2 (patch) | |
| tree | b028302bfac88c2551881b227fd4dae5d8202166 | |
| parent | c64eb62cfce242a57a7276ca8280ae0baab29d05 (diff) | |
| download | linux-5790b53390e18fdd21e70776e46d058c05eda2f2.tar.gz | |
virtio-balloon: initialize all vq callbacks
Ensure that elements of the callbacks array that correspond to
unavailable features are set to NULL; previously, they would be left
uninitialized.
Since the corresponding names array elements were explicitly set to
NULL, the uninitialized callback pointers would not actually be
dereferenced; however, the uninitialized callbacks elements would still
be read in vp_find_vqs_msix() and used to calculate the number of MSI-X
vectors required.
Cc: stable@vger.kernel.org
Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 93f995f6cf3645..8e400ece92735c 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -475,7 +475,9 @@ static int init_vqs(struct virtio_balloon *vb) names[VIRTIO_BALLOON_VQ_INFLATE] = "inflate"; callbacks[VIRTIO_BALLOON_VQ_DEFLATE] = balloon_ack; names[VIRTIO_BALLOON_VQ_DEFLATE] = "deflate"; + callbacks[VIRTIO_BALLOON_VQ_STATS] = NULL; names[VIRTIO_BALLOON_VQ_STATS] = NULL; + callbacks[VIRTIO_BALLOON_VQ_FREE_PAGE] = NULL; names[VIRTIO_BALLOON_VQ_FREE_PAGE] = NULL; if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ)) { |