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