Re: repost: patch for 2.1.108 LDT problems

Alan Cox (
Tue, 7 Jul 1998 02:42:52 +0100 (BST)

> The attached patch is an update for 2.1.108 of the previous patch to fix
> various LDT-related problems.
> The patch ensures that each clone task using an LDT gets its own slot in
> the GDT, in case the prior task exits first. It also adds some sanity
> checks when LDT entries are being changed, and improves the register
> dump routine to display additional information.

There is one other thing we really need here. Given the AMD K6 bug and the
fact AMD are it seems choosing to ignore all email on the segment bug that
lets any user lock up the K6 we ought to check for a K6 and refuse to let
anyone but root add LDT entries. That way the chip isnt crashable by
normal users in 2.1.x

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