linux-kernel - [PATCH 0/2] uaccess: Add masked_user_read_access

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Message-Id: <20250209105600.3388-1-david.laight.linux@gmail.com>
Date: Sun,  9 Feb 2025 10:55:58 +0000
From: David Laight <david.laight.linux@...il.com>
To: linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc: David Laight <david.laight.linux@...il.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>,
	Jan Kara <jack@...e.cz>,
	Arnd Bergmann <arnd@...db.de>,
	Kees Cook <kees@...nel.org>
Subject: [PATCH 0/2] uaccess: Add masked_user_read_access_begin

The code pattern for masked user access is unwieldy.
Add a new wrapper masked_user_read_access_begin() to simplify it.
Add the equivalent write wrapper.

Change fs/select.c to use the new wrappers when reading the
sigset_argpack and when writing out the result of poll.

The futex code could also be changed.

Note that this might conflict with the patch to change
get_sigset_argpack to __always_inline.

David Laight (2):
  uaccess: Simplify code pattern for masked user copies
  fs: Use masked_user_read_access_begin()

 fs/select.c             |  8 +++-----
 include/linux/uaccess.h | 21 +++++++++++++++++++++
 2 files changed, 24 insertions(+), 5 deletions(-)

-- 
2.39.5