[Bug 296578] loader use after free in UFS implementation

[email protected] Tue, 07 Jul 2026 17:45:12 +0000
Newsgroups gmane.os.freebsd.bugs
Message-ID <[email protected]/bugzilla/>
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296578

Toomas Soome <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #2 from Toomas Soome <[email protected]> ---
(In reply to Jordan Gordeev from comment #0)
hm, based on this description, switching currdev does apparently trigger the
"umount" of ufs despite we should have open file from it. We probably want to
do something like transfer mount to vdisk (so we avoid leaking the mount on
unmapping vdisk) and to make sure we have valid data still.

You can verify if keeping currdev as is and accessing vdisk0: directly
(example: ls vdisk0:) will work as expected.

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