Re: user-mode port 0.58-2.4.18-36

Pavel Machek (pavel@ucw.cz)
Sat, 6 Jul 2002 03:16:45 +0200


Hi!

> This is the fourth release of the 2.4.18 UML.
>
> The major changes in this release include:
>
> It is now possible the to attach the UML gdb to sleeping threads.
> This is done by detaching gdb from the in-context thread and attaching
> it to the host pid of the sleeping UML process. UML may be continued
> by reattaching to the in-context thread. This feature was sponsored
> by Cluster File Systems, Inc.
>
> There is a /proc/exitcode, which allows a UML process to set the
> eventual UML exit code.
>
> Fixed some segfaults caused by calling openpty, which has an unusually
> large stack frame, overflowing the UML kernel stack.
>
> The tty logging patch is integrated. This allows UML honeypots to
> log all tty traffic to a host file. This logging can't be detected
> or interfered with by root inside the UML.

So... what prevents uml root from inserting rogue module (perhaps
using /dev/kmem) and escape the jail?

> The UML binary now lives in its own physical memory. This makes it
> easier for the swsusp patch to be ported to UML.

Good ;-).
Pavel

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