Mdev alias should be unique among all the mdevs, so that when such alias is used by the mdev users to derive other objects, there is no collision in a given system.
Signed-off-by: Parav Pandit <[email protected]> --- drivers/vfio/mdev/mdev_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c index e825ff38b037..6eb37f0c6369 100644 --- a/drivers/vfio/mdev/mdev_core.c +++ b/drivers/vfio/mdev/mdev_core.c @@ -375,6 +375,11 @@ int mdev_device_create(struct kobject *kobj, struct device *dev, ret = -EEXIST; goto mdev_fail; } + if (tmp->alias && strcmp(tmp->alias, alias) == 0) { + mutex_unlock(&mdev_list_lock); + ret = -EEXIST; + goto mdev_fail; + } } mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); -- 2.19.2
