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Message-ID: <20180628061758.j6bytsaj5jk4aocg@ltop.local>
Date: Thu, 28 Jun 2018 08:17:59 +0200
From: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
To: Catalin Marinas <catalin.marinas@....com>
Cc: Ramana Radhakrishnan <ramana.radhakrishnan@....com>,
Andrey Konovalov <andreyknvl@...gle.com>,
Mark Rutland <Mark.Rutland@....com>,
Kate Stewart <kstewart@...uxfoundation.org>,
"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
Will Deacon <Will.Deacon@....com>,
Kostya Serebryany <kcc@...gle.com>,
"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
Chintan Pandya <cpandya@...eaurora.org>,
Shuah Khan <shuah@...nel.org>, Ingo Molnar <mingo@...nel.org>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
Jacob Bramley <Jacob.Bramley@....com>,
Dmitry Vyukov <dvyukov@...gle.com>,
Evgeniy Stepanov <eugenis@...gle.com>,
Kees Cook <keescook@...omium.org>,
Ruben Ayrapetyan <Ruben.Ayrapetyan@....com>,
Al Viro <viro@...iv.linux.org.uk>, nd <nd@....com>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
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Andrew Morton <akpm@...ux-foundation.org>,
Robin Murphy <Robin.Murphy@....com>,
"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH v4 0/7] arm64: untag user pointers passed to the kernel
On Wed, Jun 27, 2018 at 06:17:58PM +0100, Catalin Marinas wrote:
>
> sparse is indeed an option. The current implementation doesn't warn on
> an explicit cast from (void __user *) to (unsigned long) since that's a
> valid thing in the kernel. I couldn't figure out if there's any other
> __attribute__ that could be used to warn of such conversion.
Hi,
sparse doesn't have such attribute but would an new option that would warn
on such cast be a solution for your case?
-- Luc
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