diff options
Diffstat (limited to 'drivers/xen/gntdev.c')
| -rw-r--r-- | drivers/xen/gntdev.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c index 61ea855c4508..1dcc4675580e 100644 --- a/drivers/xen/gntdev.c +++ b/drivers/xen/gntdev.c @@ -670,11 +670,15 @@ static long gntdev_ioctl_map_grant_ref(struct gntdev_priv *priv, mutex_lock(&priv->lock); gntdev_add_map(priv, map); op.index = map->index << PAGE_SHIFT; - mutex_unlock(&priv->lock); - if (copy_to_user(u, &op, sizeof(op)) != 0) + if (copy_to_user(u, &op, sizeof(op)) != 0) { + list_del(&map->next); + mutex_unlock(&priv->lock); + gntdev_put_map(priv, map); return -EFAULT; + } + mutex_unlock(&priv->lock); return 0; } |