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-next>] [day] [month] [year] [list]
Date: Thu, 08 Feb 2024 15:47:50 +0000
From: Alice Ryhl <aliceryhl@...gle.com>
To: Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	"Björn Roy Baron" <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, 
	Andreas Hindborg <a.hindborg@...sung.com>, Kees Cook <keescook@...omium.org>, 
	Al Viro <viro@...iv.linux.org.uk>, Andrew Morton <akpm@...ux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	"Arve Hjønnevåg" <arve@...roid.com>, Todd Kjos <tkjos@...roid.com>, Martijn Coenen <maco@...roid.com>, 
	Joel Fernandes <joel@...lfernandes.org>, Carlos Llamas <cmllamas@...gle.com>, 
	Suren Baghdasaryan <surenb@...gle.com>, Arnd Bergmann <arnd@...db.de>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	Alice Ryhl <aliceryhl@...gle.com>, Christian Brauner <brauner@...nel.org>
Subject: [PATCH v2 0/4] Memory management patches needed by Rust Binder

This patchset contains some abstractions needed by the Rust
implementation of the Binder driver for passing data between userspace,
kernelspace, and directly into other processes.

These abstractions do not exactly match what was included in the Rust
Binder RFC - I have made various improvements and simplifications since
then. Nonetheless, please see the Rust Binder RFC [1] to get an
understanding for how this will be used:

Users of "rust: add userspace pointers"
     and "rust: add typed accessors for userspace pointers":
	rust_binder: add binderfs support to Rust binder
	rust_binder: add threading support
	rust_binder: add nodes and context managers
	rust_binder: add oneway transactions
	rust_binder: add death notifications
	rust_binder: send nodes in transactions
	rust_binder: add BINDER_TYPE_PTR support
	rust_binder: add BINDER_TYPE_FDA support
	rust_binder: add process freezing

Users of "rust: add abstraction for `struct page`":
	rust_binder: add oneway transactions
	rust_binder: add vma shrinker

Especially the second patch with typed accessors needs review. It
contains a Rust analogy for when the C-side skips `check_object_size`,
and I would be very happy to receive feedback about whether I am going
about this in a reasonable way.

Links: https://lore.kernel.org/rust-for-linux/20231101-rust-binder-v1-0-08ba9197f637@google.com/ [1]
Signed-off-by: Alice Ryhl <aliceryhl@...gle.com>
---
Changes in v2:
- Rename user_ptr module to uaccess.
- Use srctree-relative links.
- Improve documentation.
- Rename UserSlicePtr to UserSlice.
- Make read_to_end append to the buffer.
- Use named fields for uaccess types.
- Add examples.
- Use _copy_from/to_user to skip check_object_size.
- Rename traits and move to kernel::types.
- Remove PAGE_MASK constant.
- Rename page methods to say _raw.
- Link to v1: https://lore.kernel.org/r/20240124-alice-mm-v1-0-d1abcec83c44@google.com

---
Alice Ryhl (2):
      rust: uaccess: add typed accessors for userspace pointers
      rust: add abstraction for `struct page`

Arnd Bergmann (1):
      uaccess: always export _copy_[from|to]_user with CONFIG_RUST

Wedson Almeida Filho (1):
      rust: uaccess: add userspace pointers

 include/linux/uaccess.h         |  37 ++--
 lib/usercopy.c                  |  30 +---
 rust/bindings/bindings_helper.h |   1 +
 rust/helpers.c                  |  34 ++++
 rust/kernel/lib.rs              |   2 +
 rust/kernel/page.rs             | 209 ++++++++++++++++++++++
 rust/kernel/types.rs            |  67 +++++++
 rust/kernel/uaccess.rs          | 387 ++++++++++++++++++++++++++++++++++++++++
 8 files changed, 727 insertions(+), 40 deletions(-)
---
base-commit: f090f0d0eea9666a96702b29bc9a64cbabee85c5
change-id: 20231128-alice-mm-bc533456cee8

Best regards,
-- 
Alice Ryhl <aliceryhl@...gle.com>


Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ