[Bug 233578] Unprivileged local user can prevent other users logging in by locking utx.active

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233578

Conrad Meyer <cem at freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|11.2-RELEASE                |CURRENT

--- Comment #1 from Conrad Meyer <cem at freebsd.org> ---
(a) sort of breaks the libc getutxent APIs for ordinary users.

Happily, the getutxent APIs do not try to use locking to get a consistent
snapshot of the file, so (b) should fix the problem just fine.

https://github.com/freebsd/freebsd/blob/master/lib/libc/gen/getutxent.c

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