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Subject[PATCH 0/9] x86, pkeys: two protection keys bug fixes
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 <>

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