vfio: fix possible use after free of vfio group
The vfio group should be released after
the vfio_group_try_dissolve_container call.
The code should not rely on someone else to hold
a reference on the group.
Signed-off-by: Ilya Lesokhin <ilyal@mellanox.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index 6fd6fa5..d1d70e0 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1711,8 +1711,8 @@
void vfio_group_put_external_user(struct vfio_group *group)
{
- vfio_group_put(group);
vfio_group_try_dissolve_container(group);
+ vfio_group_put(group);
}
EXPORT_SYMBOL_GPL(vfio_group_put_external_user);