linux-kernel - Re: [PATCH] rust: allocator: Prevents mis-aligned allocation

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Message-ID: <CANiq72=pb18B6NOcXF03d0ctOP8kv2dqnUeNyEuSvuDb=vs-0g@mail.gmail.com>
Date:   Sat, 29 Jul 2023 16:01:03 +0200
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Boqun Feng <boqun.feng@...il.com>
Cc:     rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Martin Rodriguez Reboredo <yakoyoku@...il.com>,
        Alice Ryhl <aliceryhl@...gle.com>,
        Dariusz Sosnowski <dsosnowski@...snowski.pl>,
        Geoffrey Thomas <geofft@...reload.com>,
        Fox Chen <foxhlchen@...il.com>,
        John Baublitz <john.m.baublitz@...il.com>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Hyeonggon Yoo <42.hyeyoo@...il.com>,
        Kees Cook <keescook@...omium.org>,
        Andreas Hindborg <nmi@...aspace.dk>, stable@...r.kernel.org
Subject: Re: [PATCH] rust: allocator: Prevents mis-aligned allocation

On Tue, Jun 13, 2023 at 6:44 PM Boqun Feng <boqun.feng@...il.com> wrote:
>
> Cc: stable@...r.kernel.org # v6.1+

Applied to `rust-next`, thanks!

However, should this go to stable? The actual functions being called
are the `__rust_*` ones (until they get removed in 1.71), no? Thus
this is not actually fixing the actual functions being called, right?

If that is correct, then the fix should change the functions below,
perhaps adding `krealloc_with_flags()` from the other patch (it does
not need to be a method, by the way), and calling it with a `Layout`
like the generated ones do. Then I can rebase `rust-next` on top of
the fix that adds the `krealloc_with_flags()`.

Cheers,
Miguel