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virtio_balloon: fix race by fill and leak
[firefly-linux-kernel-4.4.55.git]
/
drivers
/
virtio
/
virtio_balloon.c
diff --git
a/drivers/virtio/virtio_balloon.c
b/drivers/virtio/virtio_balloon.c
index 7efc32945810e8fdcafa76a6328517f35d65ea3c..7d3e5d0e9aa4ff907ab5e51284b57b9492bf3891 100644
(file)
--- a/
drivers/virtio/virtio_balloon.c
+++ b/
drivers/virtio/virtio_balloon.c
@@
-209,8
+209,8
@@
static unsigned leak_balloon(struct virtio_balloon *vb, size_t num)
*/
if (vb->num_pfns != 0)
tell_host(vb, vb->deflate_vq);
- mutex_unlock(&vb->balloon_lock);
release_pages_balloon(vb);
+ mutex_unlock(&vb->balloon_lock);
return num_freed_pages;
}