Messages in this thread | | | From | Andy Lutomirski <> | Date | Tue, 28 Jul 2015 10:07:01 -0700 | Subject | Re: [PATCH v4 0/3] x86: modify_ldt improvement, test, and config option |
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On Tue, Jul 28, 2015 at 9:30 AM, Andrew Cooper <andrew.cooper3@citrix.com> wrote: > I suspect that the set_ldt(NULL, 0) call hasn't reached Xen before > xen_free_ldt() is attempting to nab back the pages which Xen still has > mapped as an LDT. >
I just instrumented it with yet more LSL instructions. I'm pretty sure that set_ldt really is clearing at least LDT entry zero. Nonetheless the free_ldt call still oopses.
--Andy
> ~Andrew
-- Andy Lutomirski AMA Capital Management, LLC
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