Messages in this thread Patch in this message | | | From | Ram Pai <> | Subject | [PATCH v10 14/24] selftests/vm: clear the bits in shadow reg when a pkey is freed. | Date | Mon, 22 Jan 2018 10:52:07 -0800 |
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When a key is freed, the key is no more effective. Clear the bits corresponding to the pkey in the shadow register. Otherwise it will carry some spurious bits which can trigger false-positive asserts.
Signed-off-by: Ram Pai <linuxram@us.ibm.com> --- tools/testing/selftests/vm/protection_keys.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 55a25e1..d1cbdfe 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -586,7 +586,8 @@ int sys_pkey_free(unsigned long pkey) int ret = syscall(SYS_pkey_free, pkey); if (!ret) - shadow_pkey_reg &= reset_bits(pkey, PKEY_DISABLE_ACCESS); + shadow_pkey_reg &= reset_bits(pkey, + PKEY_DISABLE_ACCESS | PKEY_DISABLE_WRITE); dprintf1("%s(pkey=%ld) syscall ret: %d\n", __func__, pkey, ret); return ret; } -- 1.7.1
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