selftests/powerpc: Fix core-pkey for default execute permission change

Only when the key is allocated, its permission are enabled.

Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/tools/testing/selftests/powerpc/ptrace/core-pkey.c b/tools/testing/selftests/powerpc/ptrace/core-pkey.c
index 36bc312..e23e2e1 100644 (file)
--- a/tools/testing/selftests/powerpc/ptrace/core-pkey.c
+++ b/tools/testing/selftests/powerpc/ptrace/core-pkey.c
@@ -140,6 +140,10 @@ static int child(struct shared_info *info)
 
        if (disable_execute)
                info->iamr |= 1ul << pkeyshift(pkey1);
+       else
+               info->iamr &= ~(1ul << pkeyshift(pkey1));
+
+       info->iamr &= ~(1ul << pkeyshift(pkey2) | 1ul << pkeyshift(pkey3));
 
        info->uamor |= 3ul << pkeyshift(pkey1) | 3ul << pkeyshift(pkey2);