linux-kernel - [PATCH 0/9] [v2] x86, pkeys: two protection keys bug fixes

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Message-Id: <20180326172721.D5B2CBB4@viggo.jf.intel.com>
Date:   Mon, 26 Mar 2018 10:27:21 -0700
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     linux-mm@...ck.org, Dave Hansen <dave.hansen@...ux.intel.com>,
        linuxram@...ibm.com, tglx@...utronix.de, dave.hansen@...el.com,
        mpe@...erman.id.au, mingo@...nel.org, akpm@...ux-foundation.org,
        shuah@...nel.org, shakeelb@...gle.com
Subject: [PATCH 0/9] [v2] x86, pkeys: two protection keys bug fixes

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 <linuxram@...ibm.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Michael Ellermen <mpe@...erman.id.au>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>p
Cc: Shuah Khan <shuah@...nel.org>
Cc: Shakeel Butt <shakeelb@...gle.com>