From: Al Viro <viro@zeniv.linux.org.uk>
To: Alice Ryhl <aliceryhl@google.com>
Cc: "Paul Moore" <paul@paul-moore.com>,
"James Morris" <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Christian Brauner" <brauner@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Wedson Almeida Filho" <wedsonaf@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <benno.lossin@proton.me>,
"Andreas Hindborg" <a.hindborg@samsung.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Arve Hjønnevåg" <arve@android.com>,
"Todd Kjos" <tkjos@android.com>,
"Martijn Coenen" <maco@android.com>,
"Joel Fernandes" <joel@joelfernandes.org>,
"Carlos Llamas" <cmllamas@google.com>,
"Suren Baghdasaryan" <surenb@google.com>,
"Dan Williams" <dan.j.williams@intel.com>,
"Matthew Wilcox" <willy@infradead.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Daniel Xu" <dxu@dxuuu.xyz>,
"Martin Rodriguez Reboredo" <yakoyoku@gmail.com>,
"Trevor Gross" <tmgross@umich.edu>,
linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org,
rust-for-linux@vger.kernel.org, linux-fsdevel@vger.kernel.org,
"Kees Cook" <kees@kernel.org>
Subject: Re: [PATCH v10 6/8] rust: file: add `FileDescriptorReservation`
Date: Sun, 15 Sep 2024 23:05:23 +0100 [thread overview]
Message-ID: <20240915220523.GM2825852@ZenIV> (raw)
In-Reply-To: <20240915220126.GL2825852@ZenIV>
On Sun, Sep 15, 2024 at 11:01:26PM +0100, Al Viro wrote:
> There's not a lot of binary formats (5 of those currently -
> all in fs/binmt_*.c), but there's nothing to prohibit more
binfmt_*.c, sorry.
> of them. If somebody decides to add the infrastructure for
> writing those in Rust, begin_new_exec() wrapper will need
> to be documented as "never call that in scope of reserved
> descriptor". Maybe by marking that wrapper unsafe and
> telling the users about the restriction wrt descriptor
> reservations, maybe by somehow telling the compiler to
> watch out for that - or maybe the constraint will be gone
> by that time.
>
> In any case, the underlying constraint ("a thread with
> reserved descriptors should not try to get a private
> descriptor table until all those descriptors are disposed
> of one way or another") needs to be documented.
>
next prev parent reply other threads:[~2024-09-15 22:05 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-15 14:31 [PATCH v10 0/8] File abstractions needed by Rust Binder Alice Ryhl
2024-09-15 14:31 ` [PATCH v10 1/8] rust: types: add `NotThreadSafe` Alice Ryhl
2024-09-15 15:38 ` Gary Guo
2024-09-27 11:21 ` Miguel Ojeda
2024-09-24 19:45 ` Serge E. Hallyn
2024-09-25 11:06 ` Alice Ryhl
2024-09-25 13:59 ` Serge E. Hallyn
2024-09-27 10:20 ` Gary Guo
2024-09-15 14:31 ` [PATCH v10 2/8] rust: task: add `Task::current_raw` Alice Ryhl
2024-09-15 14:31 ` [PATCH v10 3/8] rust: file: add Rust abstraction for `struct file` Alice Ryhl
2024-09-15 21:51 ` Gary Guo
2024-09-15 14:31 ` [PATCH v10 4/8] rust: cred: add Rust abstraction for `struct cred` Alice Ryhl
2024-09-15 20:24 ` Kees Cook
2024-09-15 20:55 ` Alice Ryhl
2024-09-19 7:57 ` Paul Moore
2024-09-15 14:31 ` [PATCH v10 5/8] rust: security: add abstraction for secctx Alice Ryhl
2024-09-15 20:58 ` Kees Cook
2024-09-15 21:07 ` Alice Ryhl
2024-09-16 15:40 ` Casey Schaufler
2024-09-17 13:18 ` Paul Moore
2024-09-22 15:01 ` Alice Ryhl
2024-09-22 15:08 ` Alice Ryhl
2024-09-22 16:50 ` Casey Schaufler
2024-09-22 17:04 ` Alice Ryhl
2024-09-19 7:56 ` Paul Moore
2024-09-15 14:31 ` [PATCH v10 6/8] rust: file: add `FileDescriptorReservation` Alice Ryhl
2024-09-15 18:39 ` Al Viro
2024-09-15 19:34 ` Al Viro
2024-09-16 4:18 ` Al Viro
2024-09-15 20:13 ` Alice Ryhl
2024-09-15 22:01 ` Al Viro
2024-09-15 22:05 ` Al Viro [this message]
2024-09-15 14:31 ` [PATCH v10 7/8] rust: file: add `Kuid` wrapper Alice Ryhl
2024-09-15 22:02 ` Gary Guo
2024-09-23 9:13 ` Alice Ryhl
2024-09-26 16:33 ` Christian Brauner
2024-09-26 16:35 ` [PATCH] [RFC] rust: add PidNamespace wrapper Christian Brauner
2024-09-27 12:04 ` Alice Ryhl
2024-09-27 14:21 ` Christian Brauner
2024-09-27 14:58 ` Alice Ryhl
2024-10-01 9:43 ` [PATCH v2] rust: add PidNamespace Christian Brauner
2024-10-01 10:26 ` Alice Ryhl
2024-10-01 14:17 ` Christian Brauner
2024-10-01 15:45 ` Miguel Ojeda
2024-10-02 10:14 ` Christian Brauner
2024-10-02 11:08 ` Miguel Ojeda
2024-10-01 19:10 ` Gary Guo
2024-10-02 11:05 ` Christian Brauner
2024-09-15 14:31 ` [PATCH v10 8/8] rust: file: add abstraction for `poll_table` Alice Ryhl
2024-09-15 22:24 ` Gary Guo
2024-09-23 9:10 ` Alice Ryhl
2024-09-27 9:28 ` [PATCH v10 0/8] File abstractions needed by Rust Binder Christian Brauner
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