HV: hv_balloon: fix memory leak with using debugfs_lookup()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: HV: hv_balloon: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once.

References

• https://git.kernel.org/stable/c/0b570a059cf42ad6e2eb632f47c23813d58d8303
• https://git.kernel.org/stable/c/6dfb0771429a63db8561d44147f2bb76f93e1c86