reported here
https://forum.atari-home.de/index.php/topic,17910.msg269543.html#msg269543
(in German): UVK (Ultimate Virus Killer) hangs in an endless loop when
scanning a GEMDOS HD, probably when encountering an empty folder. GEMDOS
trace is in the forum post.
I don't have time to investigate but my first hunch would be that
perhaps Hatari's GEMDOS emulation does not handle the pattern in
Fsfirst("***.***", 0x7) correctly.
Is someone working on this? I was able to reproduce the user's report
using UVK from https://www.atarimania.com/pgedump.awp?id=35365.
I still think it's a Hatari bug, probably related to the "***.***" pattern.