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From: Dave Hansen <>
Cc:, Dave Hansen <>,,,,,,,,
Subject: [PATCH 0/9] [v3] x86, pkeys: two protection keys bug fixes
Date: Fri, 27 Apr 2018 10:45:27 -0700	[thread overview]
Message-ID: <> (raw)

Hi x86 maintainers,

This set is basically unchanged from the last post.  There was
some previous discussion about other ways to fix this with the ppc
folks (Ram Pai), but we've concluded that this x86-specific fix is
fine.  I think Ram had a different fix for ppc.

Changes from v2:
 * Clarified commit message in patch 1/9 taking some feedback from

Changes from v1:
 * Added Fixes: and cc'd stable.  No code changes.


This fixes two bugs, and adds selftests to make sure they stay fixed:

1. pkey 0 was not usable via mprotect_pkey() because it had never
   been explicitly allocated.
2. mprotect(PROT_EXEC) memory could sometimes be left with the
   implicit exec-only protection key assigned.

I already posted #1 previously.  I'm including them both here because
I don't think it's been picked up in case folks want to pull these
all in a single bundle.

Cc: Ram Pai <>
Cc: Thomas Gleixner <>
Cc: Dave Hansen <>
Cc: Michael Ellermen <>
Cc: Ingo Molnar <>
Cc: Andrew Morton <>p
Cc: Shuah Khan <>
Cc: Shakeel Butt <>

             reply	other threads:[~2018-04-27 17:49 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27 17:45 Dave Hansen [this message]
2018-04-27 17:45 ` [PATCH 1/9] x86, pkeys: do not special case protection key 0 Dave Hansen
2018-04-27 17:45 ` [PATCH 2/9] x86, pkeys, selftests: save off 'prot' for allocations Dave Hansen
2018-04-27 17:45 ` [PATCH 3/9] x86, pkeys, selftests: add a test for pkey 0 Dave Hansen
2018-04-27 17:45 ` [PATCH 4/9] x86, pkeys: override pkey when moving away from PROT_EXEC Dave Hansen
2018-04-27 17:45 ` [PATCH 5/9] x86, pkeys, selftests: fix pointer math Dave Hansen
2018-04-27 17:45 ` [PATCH 6/9] x86, pkeys, selftests: fix pkey exhaustion test off-by-one Dave Hansen
2018-04-27 17:45 ` [PATCH 7/9] x86, pkeys, selftests: factor out "instruction page" Dave Hansen
2018-04-27 17:45 ` [PATCH 8/9] x86, pkeys, selftests: add allow faults on unknown keys Dave Hansen
2018-04-27 17:45 ` [PATCH 9/9] x86, pkeys, selftests: add PROT_EXEC test Dave Hansen
2018-04-28  7:05 ` [PATCH 0/9] [v3] x86, pkeys: two protection keys bug fixes Ingo Molnar
2018-04-28  7:15   ` Ingo Molnar
2018-04-28  8:29     ` Ingo Molnar
2018-04-30 15:30   ` Dave Hansen
2018-04-30 16:28     ` Ram Pai
2018-05-08 22:49   ` Dave Hansen

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