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 <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Michael Ellermen <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Andrew Morton <[email protected]>p Cc: Shuah Khan <[email protected]> Cc: Shakeel Butt <[email protected]>
