From: David Laight <david.laight.linux@gmail.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>,
Jann Horn <jannh@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: pidfd && O_RDWR
Date: Mon, 23 Feb 2026 18:14:44 +0000 [thread overview]
Message-ID: <20260223181444.1d87e3a2@pumpkin> (raw)
In-Reply-To: <aZyI6Aht747CTLiC@redhat.com>
On Mon, 23 Feb 2026 18:05:44 +0100
Oleg Nesterov <oleg@redhat.com> wrote:
> On 02/23, Oleg Nesterov wrote:
> >
> > Sorry for noise!
>
> Yes, but let me add more (off-topic) noise to this thread...
>
> pidfd_prepare() does pidfs_alloc_file(pid, flags | O_RDWR) and "| O_RDWR"
> makes no sense because pidfs_alloc_file() itself does
>
> flags |= O_RDWR;
>
> I was going to send the trivial cleanup, but why a pidfs file needs
> O_RDWR/FMODE_WRITE ?
Or why any program that gets that far through the code 'wins'
write access.
David
next prev parent reply other threads:[~2026-02-23 18:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-23 10:44 [PATCH v4 0/4] pidfd: add CLONE_AUTOREAP and CLONE_PIDFD_AUTOKILL Christian Brauner
2026-02-23 10:44 ` [PATCH v4 1/4] clone: add CLONE_AUTOREAP Christian Brauner
2026-02-23 10:44 ` [PATCH v4 2/4] pidfd: add CLONE_PIDFD_AUTOKILL Christian Brauner
2026-02-23 15:47 ` Oleg Nesterov
2026-02-23 15:51 ` Oleg Nesterov
2026-02-23 17:05 ` pidfd && O_RDWR Oleg Nesterov
2026-02-23 18:14 ` David Laight [this message]
2026-02-23 19:21 ` Oleg Nesterov
2026-02-23 21:39 ` Christian Brauner
2026-02-24 9:43 ` David Laight
2026-02-24 10:17 ` Oleg Nesterov
2026-02-24 16:47 ` Christian Brauner
2026-02-23 10:45 ` [PATCH v4 3/4] selftests/pidfd: add CLONE_AUTOREAP tests Christian Brauner
2026-02-23 10:45 ` [PATCH v4 4/4] selftests/pidfd: add CLONE_PIDFD_AUTOKILL tests Christian Brauner
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