linux-kernel - Re: kvm splat in mmu_spte_clear_track

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20170829125923.g3tp22bzsrcuruks@angband.pl>
Date:   Tue, 29 Aug 2017 14:59:23 +0200
From:   Adam Borowski <kilobyte@...band.pl>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Bernhard Held <berny156@....de>, Nadav Amit <nadav.amit@...il.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <kernellwp@...il.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Joerg Roedel <jroedel@...e.de>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        kvm <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: kvm splat in mmu_spte_clear_track_bits

On Tue, Aug 29, 2017 at 02:45:41PM +0200, Takashi Iwai wrote:
> [Put more people to Cc, sorry for growing too much...]

We're all interested in 4.13.0 not crashing on us, so that's ok.

> On Tue, 29 Aug 2017 11:19:13 +0200,
> Bernhard Held wrote:
> > 
> > On 08/28/2017 at 06:56 PM, Nadav Amit wrote:
> > > Don’t blame me for the TLB stuff... My money is on aac2fea94f7a .
> > 
> > Amit, thanks for your courage to expose your patch!
> > 
> > I'm more and more confident that aac2fea94f7a is the culprit.  Maybe it
> > just accelerates the triggering of the splash.  To be more sure the
> > kernel needs to be tested for a couple of days.  It would be great if
> > others could assist in testing aac2fea94f7a.
> 
> I'm testing with the revert for a while and it seems working.

With nothing but aac2fea94f7a reverted, no explosions for me either.

-- 
⢀⣴⠾⠻⢶⣦⠀ 
⣾⠁⢰⠒⠀⣿⡁ Vat kind uf sufficiently advanced technology iz dis!?
⢿⡄⠘⠷⠚⠋⠀                                 -- Genghis Ht'rok'din
⠈⠳⣄⠀⠀⠀⠀