linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Feng Tang <feng.tang@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: bugzilla-daemon@bugzilla.kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Juergen Gross <jgross@suse.com>, Ingo Molnar <mingo@elte.hu>,
	"H. Peter Anvin" <hpa@zytor.com>,
	boyarsh@altlinux.org, linux-kernel@vger.kernel.org
Subject: Re: [Bug 201637] New: hangup sinse  'x86/mm: Expand static page table for fixmap space' with CONFIG_RANDOMIZE_BASE enabled
Date: Fri, 9 Nov 2018 09:29:29 +0800	[thread overview]
Message-ID: <20181109012929.a2qgtkjw5fnyrsz4@shbuild888> (raw)
In-Reply-To: <20181108142052.b8218ee02560864ef9e640b7@linux-foundation.org>

Hi All,

On Thu, Nov 08, 2018 at 02:20:52PM -0800, Andrew Morton wrote:
> 
> (switched to email.  Please respond via emailed reply-to-all, not via the
> bugzilla web interface).
> 
> On Thu, 08 Nov 2018 13:48:25 +0000 bugzilla-daemon@bugzilla.kernel.org wrote:
> 
> > https://bugzilla.kernel.org/show_bug.cgi?id=201637
> > 
> >             Bug ID: 201637
> >            Summary: hangup sinse  'x86/mm: Expand static page table for
> >                     fixmap space' with CONFIG_RANDOMIZE_BASE enabled
> >            Product: Memory Management
> >            Version: 2.5
> >     Kernel Version: 4.9.133
> >           Hardware: All
> >                 OS: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: high
> >           Priority: P1
> >          Component: Other
> >           Assignee: akpm@linux-foundation.org
> >           Reporter: boyarsh@altlinux.org
> >         Regression: No
> > 
> > I have early kernel hungup on x86_64 since 4.9.133 and i've finaly bisected it.
> > 
> > This commit is incompatible with CONFIG_RANDOMIZE_BASE enabled and cause
> > immediate silent hangup during boot. 

Thanks for reporting. The patch revert was queued already. see
https://lkml.org/lkml/2018/11/2/453

And you are right, the problem is related with the kernel address randomization,
the original patch in mainline covers it, and the problem happens during my manual
backporting to 4.9, where I didn't fine head64.c and wrongly assumed KASLR was
not in 4.9 :(   sorry for the trouble. 

Thanks,
Feng




      reply	other threads:[~2018-11-09  1:22 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-201637-27@https.bugzilla.kernel.org/>
2018-11-08 22:20 ` [Bug 201637] New: hangup sinse 'x86/mm: Expand static page table for fixmap space' with CONFIG_RANDOMIZE_BASE enabled Andrew Morton
2018-11-09  1:29   ` Feng Tang [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20181109012929.a2qgtkjw5fnyrsz4@shbuild888 \
    --to=feng.tang@intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=boyarsh@altlinux.org \
    --cc=bugzilla-daemon@bugzilla.kernel.org \
    --cc=hpa@zytor.com \
    --cc=jgross@suse.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=tglx@linutronix.de \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).