> On Jun 26, 2019, at 6:45 AM, Lorenz Bauer <lmb@xxxxxxxxxxxxxx> wrote: > > On Tue, 25 Jun 2019 at 19:23, Song Liu <songliubraving@xxxxxx> 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
