> On Jun 26, 2019, at 6:45 AM, Lorenz Bauer <l...@cloudflare.com> wrote:
>
> On Tue, 25 Jun 2019 at 19:23, Song Liu <songliubrav...@fb.com> wrote:
>>
>> This patch introduce unprivileged BPF access. The access control is
>> achieved via device /dev/bpf. Users with access to /dev/bpf are able
>> to access BPF syscall.
>>
>> Two ioctl command are added to /dev/bpf:
>>
>> The first two commands get/put permission to access sys_bpf. This
>> permission is noted by setting bit TASK_BPF_FLAG_PERMITTED of
>> current->bpf_flags. This permission cannot be inherited via fork().
>
> I know nothing about the scheduler, so pardon my ignorance. Does
> TASK_BPF_FLAG_PERMITTED apply per user-space process, or per thread?
It is per thread. clone() also clears the bit. I will make it more
clear int the commit log.
Thanks,
Song
