Re: [PATCH] selftests/clone3: Fix capability dropping by using standard libcap API

[Shuah Khan]

On 3/9/26 21:14, Yi Lai wrote:
> The clone3_cap_checkpoint_restore.c selftest defined its own 'struct
> libcap' to manually cast and manipulate the internal memory layout of
> the opaque 'cap_t' type.
>
> Starting with libcap v2.60 (commit aca076443591 "Make cap_t operations
> thread safe"), a '__u8 mutex' was added to the beginning of the internal
> 'struct _cap_struct'. This structural shift breaks the selftest's custom
> struct layout assumptions, causing capability corruption and leading to
> failures during test execution.
>
> Fix this by removing the custom struct definition and use the standard
> cap_set_flag() API.

What king of failures are you seeing? Can you send the failures from
the run?

> Fixes: 1d27a0be16d6 ("selftests: add clone3() CAP_CHECKPOINT_RESTORE test")
> Signed-off-by: Yi Lai <yi1.lai@xxxxxxxxx>
> ---

thanks,
-- Shuah