selftests/powerpc: Harden test for execute-disabled pkeys

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Commit 192b6a7805 ("powerpc/book3s64/pkeys: Fix
pkey_access_permitted() for execute disable pkey") fixed a
bug that caused repetitive faults for pkeys with no execute
rights alongside some combination of read and write rights.

This removes the last two cases of the test, which check
the behaviour of pkeys with read, write but no execute
rights and all the rights, in favour of checking all the
possible combinations of read, write and execute rights
to be able to detect bugs like the one mentioned above.

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/db467500f8af47727bba6b35796e8974a78b71e5.1595821792.git.sandipan@linux.ibm.com

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Sandipan Das 2020-07-27 09:30:37 +05:30 • committed by Michael Ellerman

parent 264d7fccc4

commit 03634bbf5d

1 changed files with 41 additions and 43 deletions

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tools/testing/selftests/powerpc/mm/pkey_exec_prot.c

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