linux-kernel - Re: [patch V5 00/12] uaccess: Provide and use scopes for user access

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Message-ID: <e0795f90-1030-4954-aefc-be137e9db49e@csgroup.eu>
Date: Tue, 4 Nov 2025 07:35:04 +0100
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>
Cc: kernel test robot <lkp@...el.com>, Russell King <linux@...linux.org.uk>,
 linux-arm-kernel@...ts.infradead.org,
 Linus Torvalds <torvalds@...ux-foundation.org>, x86@...nel.org,
 Madhavan Srinivasan <maddy@...ux.ibm.com>,
 Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>,
 linuxppc-dev@...ts.ozlabs.org, Paul Walmsley <pjw@...nel.org>,
 Palmer Dabbelt <palmer@...belt.com>, linux-riscv@...ts.infradead.org,
 Heiko Carstens <hca@...ux.ibm.com>,
 Christian Borntraeger <borntraeger@...ux.ibm.com>,
 Sven Schnelle <svens@...ux.ibm.com>, linux-s390@...r.kernel.org,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Cooper <andrew.cooper3@...rix.com>,
 David Laight <david.laight.linux@...il.com>,
 Julia Lawall <Julia.Lawall@...ia.fr>, Nicolas Palix <nicolas.palix@...g.fr>,
 Peter Zijlstra <peterz@...radead.org>, Darren Hart <dvhart@...radead.org>,
 Davidlohr Bueso <dave@...olabs.net>, André Almeida
 <andrealmeid@...lia.com>, Alexander Viro <viro@...iv.linux.org.uk>,
 Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
 linux-fsdevel@...r.kernel.org
Subject: Re: [patch V5 00/12] uaccess: Provide and use scopes for user access



Le 27/10/2025 à 09:43, Thomas Gleixner a écrit :
> This is a follow up on the V4 feedback:
> 
>     https://lore.kernel.org/20251022102427.400699796@linutronix.de
> 
> Changes vs. V4:
> 
>    - Rename get/put_user_masked() to get/put_user_inline()
> 
>    - Remove the futex helpers. Keep the inline get/put for now as it needs
>      more testing whether they are really valuable.
> 
>    - Picked up tags
> 
> The series is based on v6.18-rc1 and also available from git:
> 
>      git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git uaccess/scoped
> 

move_addr_to_user() in net/socket.c and put_cmsg() in net/core/scm.c 
should be converted as well

Christophe

> Thanks,
> 
> 	tglx
> ---
> Thomas Gleixner (12):
>        ARM: uaccess: Implement missing __get_user_asm_dword()
>        uaccess: Provide ASM GOTO safe wrappers for unsafe_*_user()
>        x86/uaccess: Use unsafe wrappers for ASM GOTO
>        powerpc/uaccess: Use unsafe wrappers for ASM GOTO
>        riscv/uaccess: Use unsafe wrappers for ASM GOTO
>        s390/uaccess: Use unsafe wrappers for ASM GOTO
>        uaccess: Provide scoped user access regions
>        uaccess: Provide put/get_user_inline()
>        coccinelle: misc: Add scoped_masked_$MODE_access() checker script
>        futex: Convert to get/put_user_inline()
>        x86/futex: Convert to scoped user access
>        select: Convert to scoped user access
> 
>   arch/arm/include/asm/uaccess.h               |   26 ++
>   arch/powerpc/include/asm/uaccess.h           |    8
>   arch/riscv/include/asm/uaccess.h             |    8
>   arch/s390/include/asm/uaccess.h              |    4
>   arch/x86/include/asm/futex.h                 |   75 ++----
>   arch/x86/include/asm/uaccess.h               |   12 -
>   fs/select.c                                  |   12 -
>   include/linux/uaccess.h                      |  314 ++++++++++++++++++++++++++-
>   kernel/futex/core.c                          |    4
>   kernel/futex/futex.h                         |   58 ----
>   scripts/coccinelle/misc/scoped_uaccess.cocci |  108 +++++++++
>   11 files changed, 501 insertions(+), 128 deletions(-)
>