Re: x86/fpu/xsave: protection key test failures

[Babu Moger]

On 5/25/21 7:20 PM, Dave Hansen wrote:
> On 5/25/21 5:03 PM, Babu Moger wrote:
>>> What values do PKRU and the shadow have when the test fails?  Is PKRU 0?
>> It goes back to default value 0x55555554. The test is expecting it to be
>> 0. Printed them below.
>>
>> test_ptrace_of_child()::1346, pkey_reg: 0x0000000055555554 shadow:
>> 0000000000000000
>> protection_keys_64: pkey-helpers.h:127: _read_pkey_reg: Assertion
>> `pkey_reg == shadow_pkey_reg' failed.
> 
> That's backwards (shadow vs pkru) from what I was expecting.
> 
> Can you turn on all the debuging?
> 
> Just compile with -DDEBUG_LEVEL=5
> 


Copied the logs at https://pastebin.com/gtQiHg8Q