Re: [PATCH 3/4] seccomp: Add SECCOMP_USER_NOTIF_FLAG_PIDFD to get pidfd on listener trap
From: Sargun Dhillon <hidden>
Date: 2020-01-24 20:10:20
Also in:
linux-fsdevel, lkml
On Fri, Jan 24, 2020 at 10:03 AM Tycho Andersen [off-list ref] wrote:
On Fri, Jan 24, 2020 at 01:17:42AM -0800, Sargun Dhillon wrote:quoted
Currently, this just opens the group leader of the thread that triggere the event, as pidfds (currently) are limited to group leaders.I don't love the semantics of this; when they're not limited to thread group leaders any more, we won't be able to change this. Is that work far off? Tycho
We would be able to change this in the future if we introduced a flag like SECCOMP_USER_NOTIF_FLAG_PIDFD_THREAD which would send a pidfd that's for the thread, and not just the group leader. The flag could either be XOR with SECCOMP_USER_NOTIF_FLAG_PIDFD, or could require both. Alternatively, we can rename SECCOMP_USER_NOTIF_FLAG_PIDFD to SECCOMP_USER_NOTIF_FLAG_GROUP_LEADER_PIDFD.