From: Boqun Feng <boqun.feng@gmail.com>
To: Alice Ryhl <aliceryhl@google.com>
Cc: "Miguel Ojeda" <ojeda@kernel.org>,
"Matthew Wilcox" <willy@infradead.org>,
"Al Viro" <viro@zeniv.linux.org.uk>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Kees Cook" <keescook@chromium.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
"Wedson Almeida Filho" <wedsonaf@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>,
"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>,
"Arnd Bergmann" <arnd@arndb.de>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
rust-for-linux@vger.kernel.org,
"Christian Brauner" <brauner@kernel.org>
Subject: Re: [PATCH v3 2/4] uaccess: always export _copy_[from|to]_user with CONFIG_RUST
Date: Mon, 18 Mar 2024 14:16:17 -0700 [thread overview]
Message-ID: <ZfivIRxNmjaljsuP@boqun-archlinux> (raw)
In-Reply-To: <20240311-alice-mm-v3-2-cdf7b3a2049c@google.com>
On Mon, Mar 11, 2024 at 10:47:14AM +0000, Alice Ryhl wrote:
> From: Arnd Bergmann <arnd@arndb.de>
>
> Rust code needs to be able to access _copy_from_user and _copy_to_user
> so that it can skip the check_copy_size check in cases where the length
> is known at compile-time, mirroring the logic for when C code will skip
> check_copy_size. To do this, we ensure that exported versions of these
> methods are available when CONFIG_RUST is enabled.
>
> Alice has verified that this patch passes the CONFIG_TEST_USER_COPY test
> on x86 using the Android cuttlefish emulator.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Tested-by: Alice Ryhl <aliceryhl@google.com>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Regards,
Boqun
next prev parent reply other threads:[~2024-03-18 21:16 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-11 10:47 [PATCH v3 0/4] Memory management patches needed by Rust Binder Alice Ryhl
2024-03-11 10:47 ` [PATCH v3 1/4] rust: uaccess: add userspace pointers Alice Ryhl
2024-03-16 14:16 ` Benno Lossin
2024-03-18 18:59 ` Boqun Feng
2024-03-18 19:12 ` Alice Ryhl
2024-03-18 19:33 ` Boqun Feng
2024-03-18 20:10 ` Alice Ryhl
2024-03-18 21:07 ` Boqun Feng
2024-03-20 2:27 ` Boqun Feng
2024-03-20 18:39 ` Boqun Feng
2024-03-11 10:47 ` [PATCH v3 2/4] uaccess: always export _copy_[from|to]_user with CONFIG_RUST Alice Ryhl
2024-03-18 21:16 ` Boqun Feng [this message]
2024-03-11 10:47 ` [PATCH v3 3/4] rust: uaccess: add typed accessors for userspace pointers Alice Ryhl
2024-03-16 14:56 ` Benno Lossin
2024-03-19 19:32 ` Boqun Feng
2024-03-11 10:47 ` [PATCH v3 4/4] rust: add abstraction for `struct page` Alice Ryhl
2024-03-11 10:50 ` Alice Ryhl
2024-03-15 8:16 ` Andreas Hindborg
2024-03-16 15:30 ` Matthew Wilcox
2024-03-16 20:39 ` Benno Lossin
2024-03-20 8:46 ` Alice Ryhl
2024-03-21 13:15 ` Benno Lossin
2024-03-21 13:42 ` Alice Ryhl
2024-03-21 13:56 ` Benno Lossin
2024-03-21 14:11 ` Alice Ryhl
2024-03-21 14:16 ` Alice Ryhl
2024-03-21 14:19 ` Benno Lossin
2024-03-19 22:16 ` Boqun Feng
2024-03-19 22:28 ` Benno Lossin
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