linux-kernel - Re: [PATCH RFC v2 5/6] pidfs, coredump: add PIDFD_INFO

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Message-ID: <CAG48ez1x09k3neRXqZYtPwgcxN+8a9=HZCtUkok54bRwAk6BSA@mail.gmail.com>
Date: Fri, 2 May 2025 16:10:48 +0200
From: Jann Horn <jannh@...gle.com>
To: Christian Brauner <brauner@...nel.org>
Cc: Eric Dumazet <edumazet@...gle.com>, Kuniyuki Iwashima <kuniyu@...zon.com>, 
	Oleg Nesterov <oleg@...hat.com>, linux-fsdevel@...r.kernel.org, 
	"David S. Miller" <davem@...emloft.net>, Alexander Viro <viro@...iv.linux.org.uk>, 
	Daan De Meyer <daan.j.demeyer@...il.com>, David Rheinsberg <david@...dahead.eu>, 
	Jakub Kicinski <kuba@...nel.org>, Jan Kara <jack@...e.cz>, 
	Lennart Poettering <lennart@...ttering.net>, Luca Boccassi <bluca@...ian.org>, Mike Yuan <me@...dnzj.com>, 
	Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, 
	Zbigniew Jędrzejewski-Szmek <zbyszek@...waw.pl>, 
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH RFC v2 5/6] pidfs, coredump: add PIDFD_INFO_COREDUMP

On Fri, May 2, 2025 at 2:43 PM Christian Brauner <brauner@...nel.org> wrote:
> Let userspace know that the task coredumped and whether it was dumped as
> root or as regular user. The latter is needed so that access permissions
> to the executable are correctly handled.
>
> I don't think this requires any additional privileges checks. The
> missing exposure of the dumpability attribute of a given task is an
> issue we should fix given that we already expose whether a task is
> coredumping or not.

Yeah, it certainly isn't more sensitive than things like the exit code and UIDs.