On Mon, Jun 07, 2021 at 07:12:13PM +0100, Catalin Marinas wrote: > I don't think we can document all the filters that can be added on top > various syscalls, so I'd leave it undocumented (or part of the systemd > documentation). It was a user space program (systemd) breaking another > user space program (well, anything with a new enough glibc). The kernel > ABI was still valid when /sbin/init started ;). Indeed. I think from a kernel point of view the main thing is to look at why userspace feels the need to do things like this and see if there's anything we can improve or do better with in future APIs, part of the original discussion here was figuring out that there's not really any other reasonable options for userspace to implement this check at the minute.
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