linux-kernel - Re: [linux-audit/audit-kernel] BUG: audit_classify_syscall() fails to properly handle 64-bit syscalls when executing as 32-bit application on ARM (#131)

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Date:   Wed, 7 Jul 2021 11:44:44 -0700
From:   Yury Norov <yury.norov@...il.com>
To:     Andreas Schwab <schwab@...e.de>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Arnd Bergmann <arnd@...db.de>,
        linux-audit/audit-kernel 
        <reply+ADSN7RXLQ62LNLD2MK5HFHF65GIU3EVBNHHDPMBXHU@...ly.github.com>,
        linux-audit/audit-kernel <audit-kernel@...eply.github.com>,
        Mention <mention@...eply.github.com>,
        Xiongfeng Wang <wangxiongfeng2@...wei.com>,
        bobo.shaobowang@...wei.com,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
        Adam Borowski <kilobyte@...band.pl>,
        Alexander Graf <agraf@...e.de>,
        Alexey Klimov <klimov.linux@...il.com>,
        Andrew Pinski <pinskia@...il.com>,
        Bamvor Zhangjian <bamv2005@...il.com>,
        Chris Metcalf <cmetcalf@...lanox.com>,
        Christoph Muellner <christoph.muellner@...obroma-systems.com>,
        Dave Martin <Dave.Martin@....com>,
        "David S . Miller" <davem@...emloft.net>,
        Florian Weimer <fweimer@...hat.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        James Hogan <james.hogan@...tec.com>,
        James Morse <james.morse@....com>,
        Joseph Myers <joseph@...esourcery.com>,
        Lin Yongting <linyongting@...wei.com>,
        Manuel Montezelo <manuel.montezelo@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Maxim Kuvyrkov <maxim.kuvyrkov@...aro.org>,
        Nathan_Lynch <Nathan_Lynch@...tor.com>,
        Philipp Tomsich <philipp.tomsich@...obroma-systems.com>,
        Prasun Kapoor <Prasun.Kapoor@...iumnetworks.com>,
        Ramana Radhakrishnan <ramana.gcc@...glemail.com>,
        Steve Ellcey <sellcey@...iumnetworks.com>,
        Szabolcs Nagy <szabolcs.nagy@....com>,
        Paul Moore <paul@...l-moore.com>
Subject: Re: [linux-audit/audit-kernel] BUG: audit_classify_syscall() fails
 to properly handle 64-bit syscalls when executing as 32-bit application on
 ARM (#131)

On Mon, Jul 05, 2021 at 12:48:42PM +0200, Andreas Schwab wrote:
> On Jul 02 2021, Yury Norov wrote:
> 
> > At least Marvell, Samsung, Huawei, Cisco and Weiyuchen's employer
> > actively use and develop arm64/ilp32.
> 
> This is good to know.  Where can I get the uptodate kernel patches for
> ILP32?
> 
> Andreas.

The latest kernel supported by me is 5.2:
https://github.com/norov/linux/commits/ilp32-5.2

I know about working ports of ILP32 on 5.7 and 5.10, but didn't see
the code and testing results. Hopefully Paul Moore and Weiyuchen will
share more details.

Yury