Re: [PATCH RFC v3 08/10] net, pidfs, coredump: only allow coredumping tasks to connect to coredump socket
From: Christian Brauner <brauner@kernel.org>
Date: 2025-05-06 07:39:30
Also in:
linux-fsdevel, lkml
("a kernel socket" is not necessarily the same as "a kernel socket
intended for core dumping")Indeed. The usermodehelper is a kernel protocol. Here it's the task with its own credentials that's connecting to a userspace socket. Which makes this very elegant because it's just userspace IPC. No one is running around with kernel credentials anywhere.