[PATCH AUTOSEL 5.7 308/388] vfio/mdev: Fix reference count leak in add_mdev_supported_type

[Sasha Levin]

From: Qiushi Wu <wu000...@umn.edu>

[ Upstream commit aa8ba13cae3134b8ef1c1b6879f66372531da738 ]

kobject_init_and_add() takes reference even when it fails.
If this function returns an error, kobject_put() must be called to
properly clean up the memory associated with the object. Thus,
replace kfree() by kobject_put() to fix this issue. Previous
commit "b8eb718348b8" fixed a similar problem.

Fixes: 7b96953bc640 ("vfio: Mediated device Core driver")
Signed-off-by: Qiushi Wu <wu000...@umn.edu>
Reviewed-by: Cornelia Huck <coh...@redhat.com>
Reviewed-by: Kirti Wankhede <kwankh...@nvidia.com>
Signed-off-by: Alex Williamson <alex.william...@redhat.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/vfio/mdev/mdev_sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/mdev/mdev_sysfs.c b/drivers/vfio/mdev/mdev_sysfs.c
index 8ad14e5c02bf..917fd84c1c6f 100644
--- a/drivers/vfio/mdev/mdev_sysfs.c
+++ b/drivers/vfio/mdev/mdev_sysfs.c
@@ -110,7 +110,7 @@ static struct mdev_type *add_mdev_supported_type(struct 
mdev_parent *parent,
                                   "%s-%s", dev_driver_string(parent->dev),
                                   group->name);
        if (ret) {
-               kfree(type);
+               kobject_put(&type->kobj);
                return ERR_PTR(ret);
        }
 
-- 
2.25.1