In the Linux kernel, the following vulnerability has been resolved: time/debug: 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.
https://git.kernel.org/stable/c/dc39fbd865a9819db4b622f610ba17b2ebc294f4
https://git.kernel.org/stable/c/b588b42d077ce93c98704b41003bcec6a564b738
https://git.kernel.org/stable/c/5b268d8abaec6cbd4bd70d062e769098d96670aa
https://git.kernel.org/stable/c/15cffd01ed80e3506e29ba9f441e2358413b7317