linux-kernel - Re: [PATCH RFC 0/2] rcu box container for Rust + maple tree load

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aWuOtUa0mPDrnbke@google.com>
Date: Sat, 17 Jan 2026 13:29:25 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Boqun Feng <boqun.feng@...il.com>
Cc: "Paul E. McKenney" <paulmck@...nel.org>, "Liam R. Howlett" <Liam.Howlett@...cle.com>, 
	Gary Guo <gary@...yguo.net>, Miguel Ojeda <ojeda@...nel.org>, 
	"Björn Roy Baron" <bjorn3_gh@...tonmail.com>, Benno Lossin <lossin@...nel.org>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Trevor Gross <tmgross@...ch.edu>, 
	Danilo Krummrich <dakr@...nel.org>, Frederic Weisbecker <frederic@...nel.org>, 
	Neeraj Upadhyay <neeraj.upadhyay@...nel.org>, Joel Fernandes <joelagnelf@...dia.com>, 
	Josh Triplett <josh@...htriplett.org>, Uladzislau Rezki <urezki@...il.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, 
	Lai Jiangshan <jiangshanlai@...il.com>, Zqiang <qiang.zhang@...ux.dev>, 
	Andrew Ballance <andrewjballance@...il.com>, linux-kernel@...r.kernel.org, 
	rust-for-linux@...r.kernel.org, rcu@...r.kernel.org, 
	maple-tree@...ts.infradead.org, linux-mm@...ck.org
Subject: Re: [PATCH RFC 0/2] rcu box container for Rust + maple tree load_rcu

On Sat, Jan 17, 2026 at 09:11:49PM +0800, Boqun Feng wrote:
> In Rcu + RcuOld design, RcuBox is just a Box
> because these two pointer types handle reclaim + accesses.

How would that work? Dropping my RcuBox<_> must use kfree_rcu() or
synchronize_rcu() or it is unsound. So it can't just be a Box.

Alice