Fix Memory Leak in debugfs_lookup() Function

CVE-2022-48698

What is CVE-2022-48698?

A memory leak vulnerability exists in the Linux kernel specifically within the AMD display driver. This flaw arises in the use of the debugfs_lookup() function, which fails to properly release memory allocated during its execution. If dput() is not called when the result of debugfs_lookup() is no longer needed, it leads to progressive memory consumption, potentially degrading system performance and stability over time. Proper implementation of memory management practices is essential to mitigate this issue.

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