linux-kernel - Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory syscalls

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-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190525095753.caehqipafdc5m3yp@mbp>
Date:   Sat, 25 May 2019 10:57:55 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Andrey Konovalov <andreyknvl@...gle.com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-rdma@...r.kernel.org,
        linux-media@...r.kernel.org, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Will Deacon <will.deacon@....com>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kees Cook <keescook@...omium.org>,
        Yishai Hadas <yishaih@...lanox.com>,
        Felix Kuehling <Felix.Kuehling@....com>,
        Alexander Deucher <Alexander.Deucher@....com>,
        Christian Koenig <Christian.Koenig@....com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Leon Romanovsky <leon@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Kostya Serebryany <kcc@...gle.com>,
        Evgeniy Stepanov <eugenis@...gle.com>,
        Lee Smith <Lee.Smith@....com>,
        Ramana Radhakrishnan <Ramana.Radhakrishnan@....com>,
        Jacob Bramley <Jacob.Bramley@....com>,
        Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
        Robin Murphy <robin.murphy@....com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Dave Martin <Dave.Martin@....com>,
        Kevin Brodsky <kevin.brodsky@....com>,
        Szabolcs Nagy <Szabolcs.Nagy@....com>
Subject: Re: [PATCH v15 05/17] arms64: untag user pointers passed to memory
 syscalls

On Mon, May 06, 2019 at 06:30:51PM +0200, Andrey Konovalov wrote:
> +SYSCALL_DEFINE5(arm64_get_mempolicy, int __user *, policy,
> +		unsigned long __user *, nmask, unsigned long, maxnode,
> +		unsigned long, addr, unsigned long, flags)
> +{
> +	addr = untagged_addr(addr);
> +	return ksys_get_mempolicy(policy, nmask, maxnode, addr, flags);
> +}
[...]
> +SYSCALL_DEFINE6(arm64_mbind, unsigned long, start, unsigned long, len,
> +		unsigned long, mode, const unsigned long __user *, nmask,
> +		unsigned long, maxnode, unsigned int, flags)
> +{
> +	start = untagged_addr(start);
> +	return ksys_mbind(start, len, mode, nmask, maxnode, flags);
> +}

The kernel fails to build with CONFIG_NUMA disabled because the above
are in mm/mempolicy.c which is no longer compiled in.

-- 
Catalin