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From: James Morris <jmorris@namei.org>
To: Christian Brauner <christian@brauner.io>
Cc: mic@digikod.net, ksummit-discuss@lists.linuxfoundation.org
Subject: Re: [Ksummit-discuss] [TECH TOPIC] seccomp
Date: Sat, 20 Jul 2019 17:23:33 +1000 (AEST)
Message-ID: <alpine.LRH.2.21.1907201715420.26406@namei.org> (raw)
In-Reply-To: <20190719093538.dhyopljyr5ns33qx@brauner.io>

On Fri, 19 Jul 2019, Christian Brauner wrote:

> There is a close connection between 1. and 2. When a watcher intercepts
> a syscall from a watchee and starts to inspect its arguments it can -
> depending on the syscall rather often actually - determine whether or
> not the syscall would succeed or fail. If it knows that the syscall will
> succeed it currently still has to perform it in lieu of the watchee
> since there is no way to tell the kernel to "resume" or actually perform
> the syscall. It would be nice if we could discuss approaches to enabling
> this feature as well.

Landlock is exploring userspace access control via the seccomp 
syscall with ebpf, but from within the same process:


It may be worth investigating whether Landlock could be extended to a 
split watcher/watchee model.

James Morris

  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-19  9:35 Christian Brauner
2019-07-19 12:32 ` Andy Lutomirski
2019-07-20  3:18   ` Kees Cook
2019-08-14 17:54     ` Andy Lutomirski
2019-08-15 17:48       ` Kees Cook
2019-08-15 18:26         ` Andy Lutomirski
2019-08-15 18:31           ` Christian Brauner
2019-08-15 19:21             ` Andy Lutomirski
2019-07-20  7:23 ` James Morris [this message]
2019-07-20  7:41   ` Christian Brauner
2019-07-25 14:18     ` Serge E. Hallyn

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