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-next>] [day] [month] [year] [list]
Message-ID: <CA+55aFzFfLd-bXFb10Xk-pvzB3_ayN0qjOS_6u2Rwv=qgFJQmg@mail.gmail.com>
Date:   Thu, 4 Jan 2018 18:22:58 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Tom Hromatka <tom.hromatka@...cle.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Dhaval Giani <dhaval.giani@...cle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 4.15-rc6+ hang

On Thu, Jan 4, 2018 at 5:36 PM, Tom Hromatka <tom.hromatka@...cle.com> wrote:
> I am seeing a hang running kernel 4.15-rc6+ on a vanilla VirtualBox VM.
> (VirtualBox version 5.0.40)

Any chance of bisecting this?

I could imagine that all the stuff we now do for page table isolation
might confuse the VM.

> When I boot this kernel, it hangs and falls back into dracut. Here's
> the boot log immediately prior to the hang:

So a few questions:

 (a) does it work with "pti=no" on the kernel command line

 (b) what was the last kernel that worked? Is 4.15-rc5 fine, for example?

> [    0.000000] ------------[ cut here ]------------
> [    0.000000] XSAVE consistency problem, dumping leaves

I think this is a vbox issue, with virtualbox not exposing all the
xsave state, so that when the kernel adds up the xsave areas, the end
result doesn't match what the total size is reported to be.

I suspect you _should_ have gotten that before too, independently of the hang.

                  Linus

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ