linux-kernel - Re: [PATCH v3] x86/uaccess: Use pointer masking to limit uaccess speculation

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Message-ID: <YJCVzX2aZmu8GaD/@zeniv-ca.linux.org.uk>
Date:   Tue, 4 May 2021 00:31:09 +0000
From:   Al Viro <viro@...iv.linux.org.uk>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Will Deacon <will@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Waiman Long <longman@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Andy Lutomirski <luto@...nel.org>,
        Christoph Hellwig <hch@....de>,
        David Laight <David.Laight@...lab.com>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v3] x86/uaccess: Use pointer masking to limit uaccess
 speculation

On Mon, May 03, 2021 at 06:31:54PM -0500, Josh Poimboeuf wrote:
> On Wed, Sep 23, 2020 at 04:38:48AM +0100, Al Viro wrote:
> > On Mon, Sep 14, 2020 at 02:53:54PM -0500, Josh Poimboeuf wrote:
> > > Al,
> > > 
> > > This depends on Christoph's set_fs() removal patches.  Would you be
> > > willing to take this in your tree?
> > 
> > in #uaccess.x86 and #for-next
> 
> Hm, I think this got dropped somehow.   Will repost.

Ow...  #uaccess.x86 got dropped from -next at some point, mea culpa.
What I have is b4674e334bb4; it's 5.8-based (well, 5.9-rc1).  It
missed post-5.9 merge window and got lost.  Could you rebase to
to more or less current tree and repost?