Merge tag 'scrub-detect-deceptive-extensions-6.10_2024-07-29' of https://git.kernel...

xfs_scrub: detect deceptive filename extensions [v30.9 11/28]

In early 2023, malware researchers disclosed a phishing attack that was
targeted at people running Linux workstations.  The attack vector
involved the use of filenames containing what looked like a file
extension but instead contained a lookalike for the full stop (".")
and a common extension ("pdf").  Enhance xfs_scrub phase 5 to detect
these types of attacks and warn the system administrator.

This has been running on the djcloud for months with no problems.  Enjoy!

Signed-off-by: Darrick J. Wong <djwong@kernel.org>