linux-kernel - Re: [Stable-5.4][PATCH 0/3] arm64: Allow the compat vdso to be disabled at runtime

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] [day] [month] [year] [list]

Message-ID: <20200717094725.GA2421196@kroah.com>
Date:   Fri, 17 Jul 2020 11:47:25 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Marc Zyngier <maz@...nel.org>
Cc:     stable@...r.kernel.org, arnd@...db.de, sashal@...nel.org,
        naresh.kamboju@...aro.org, Mark Rutland <mark.rutland@....com>,
        Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Russell King <linux@....linux.org.uk>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [Stable-5.4][PATCH 0/3] arm64: Allow the compat vdso to be
 disabled at runtime

On Fri, Jul 17, 2020 at 11:33:57AM +0200, Greg KH wrote:
> On Fri, Jul 17, 2020 at 09:02:06AM +0100, Marc Zyngier wrote:
> > Hi Greg,
> > 
> > On 2020-07-16 12:58, Greg KH wrote:
> > > On Wed, Jul 15, 2020 at 01:56:11PM +0100, Marc Zyngier wrote:
> > > > This is a backport of the series that recently went into 5.8. Note
> > > > that the first patch is more a complete rewriting than a backport, as
> > > > the vdso implementation in 5.4 doesn't have much in common with
> > > > mainline. This affects the 32bit arch code in a benign way.
> > > > 
> > > > It has seen very little testing, as I don't have the HW that triggers
> > > > this issue. I have run it in VMs by faking the CPU MIDR, and nothing
> > > > caught fire. Famous last words.
> > > 
> > > These are also needed in 5.7.y, right?  If so, I need that series before
> > > I can take this one as we don't want people moving to a newer kernel and
> > > suffer regressions :(
> > 
> > The original mainline changes:
> > 
> > 4b661d6133c5 arm64: arch_timer: Disable the compat vdso for cores affected
> > by ARM64_WORKAROUND_1418040
> > c1fbec4ac0d7 arm64: arch_timer: Allow an workaround descriptor to disable
> > compat vdso
> > 97884ca8c292 arm64: Introduce a way to disable the 32bit vdso
> > 
> > do apply cleanly to stable-5.7. Do you want me to resend them separately,
> > or will you pick the patches directly from mainline?
> 
> Hm, cherry-pick seems to work due to file renames, let me try this
> again...

Ok, my fault, these are already all in 5.7.9, sorry for the noise.  I'll
go queue these up now.

greg "I need more coffee..." k-h