Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 22 Feb 2022 17:36:15 +0100
From:   Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To:     Arnd Bergmann <arnd@kernel.org>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Christoph Hellwig <hch@lst.de>,
        linux-arch <linux-arch@vger.kernel.org>,
        Linux-MM <linux-mm@kvack.org>,
        Linux API <linux-api@vger.kernel.org>,
        Arnd Bergmann <arnd@arndb.de>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Russell King - ARM Linux <linux@armlinux.org.uk>,
        Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>,
        Brian Cain <bcain@codeaurora.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Michal Simek <monstr@monstr.eu>,
        Nick Hu <nickhu@andestech.com>,
        Greentime Hu <green.hu@gmail.com>,
        Dinh Nguyen <dinguyen@kernel.org>,
        Stafford Horne <shorne@gmail.com>,
        Helge Deller <deller@gmx.de>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Heiko Carstens <hca@linux.ibm.com>,
        Rich Felker <dalias@libc.org>,
        David Miller <davem@davemloft.net>,
        Richard Weinberger <richard@nod.at>,
        the arch/x86 maintainers <x86@kernel.org>,
        Max Filippov <jcmvbkbc@gmail.com>,
        "Eric W . Biederman" <ebiederm@xmission.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Ard Biesheuvel <ardb@kernel.org>,
        alpha <linux-alpha@vger.kernel.org>,
        "open list:SYNOPSYS ARC ARCHITECTURE" 
        <linux-snps-arc@lists.infradead.org>, linux-csky@vger.kernel.org,
        "open list:QUALCOMM HEXAGON..." <linux-hexagon@vger.kernel.org>,
        linux-ia64@vger.kernel.org,
        linux-m68k <linux-m68k@lists.linux-m68k.org>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
        Openrisc <openrisc@lists.librecores.org>,
        Parisc List <linux-parisc@vger.kernel.org>,
        linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        linux-s390 <linux-s390@vger.kernel.org>,
        Linux-sh list <linux-sh@vger.kernel.org>,
        sparclinux <sparclinux@vger.kernel.org>,
        linux-um <linux-um@lists.infradead.org>,
        "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@linux-xtensa.org>
Subject: Re: [PATCH v2 09/18] mips: use simpler access_ok()
Message-ID: <20220222163615.GA14620@alpha.franken.de>
References: <20220216131332.1489939-1-arnd@kernel.org>
 <20220216131332.1489939-10-arnd@kernel.org>
 <20220221132456.GA7139@alpha.franken.de>
 <CAK8P3a2usZWPDDDUcscwS0aVKsY6aLXFGFPqYNkm4hcDERim9w@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAK8P3a2usZWPDDDUcscwS0aVKsY6aLXFGFPqYNkm4hcDERim9w@mail.gmail.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Precedence: bulk

On Mon, Feb 21, 2022 at 03:31:23PM +0100, Arnd Bergmann wrote:
> I'll update it this way, otherwise I'd need help in form of a patch
> that changes the exception handling so __get_user/__put_user
> also return -EFAULT for an address error.

https://lore.kernel.org/all/20220222155345.138861-1-tsbogend@alpha.franken.de/

That does the trick.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]