Re: [PATCH] x86/ldt: Fix support_pte_mask filtering in map_ldt_struct()

Borislav Petkov
2018-04-19T13:00:19Z

On Wed, Apr 18, 2018 at 02:18:57PM +0200, Borislav Petkov wrote:
> Btw, even with Jörg's fix,
>
> fb43d6cb91ef ("x86/mm: Do not auto-massage page protections")

Some updates.

1. current linus master with Joerg's fix triple-faults on the IVB laptop
during resume from disk.

2. current linus master with Joerg's fix + those two:

C Apr 17 Dave Hansen ( : 67) [PATCH 1/2] x86, pti: fix boot problems from Global-bit setting
C Apr 17 Dave Hansen ( : 81) └─>[PATCH 2/2] x86, pti: fix boot warning from Global-bit setting

triplefaults too.

Bisection confirms again fb43d6cb91ef is the first bad:

fb43d6cb91ef x86/mm: Do not auto-massage page protections <--- NOT OK
6baf4bec02db x86/espfix: Document use of _PAGE_GLOBAL <--- OK

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Regards/Gruss,
Boris.

SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg)
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