linux-kernel - Re: [PATCH v3 2/3] hvc_init(): Enforce one-time initialization.

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Message-ID: <1322053564.3581.19.camel@lappy>
Date:	Wed, 23 Nov 2011 15:06:04 +0200
From:	Sasha Levin <levinsasha928@...il.com>
To:	Amit Shah <amit.shah@...hat.com>
Cc:	Miche Baker-Harvey <miche@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	xen-devel@...ts.xensource.com,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	Anton Blanchard <anton@...ba.org>,
	Mike Waychison <mikew@...gle.com>,
	ppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	Eric Northrup <digitaleric@...gle.com>
Subject: Re: [PATCH v3 2/3] hvc_init(): Enforce one-time initialization.

On Wed, 2011-11-23 at 18:26 +0530, Amit Shah wrote:
> On (Wed) 23 Nov 2011 [16:08:52], Amit Shah wrote:
> > With this setup, with and without patches, I can spawn two consoles
> > via:
> > 
> > /sbin/agetty /dev/hvc0 9600 vt100
> > /sbin/agetty /dev/hvc1 9600 vt100
> > 
> > (Strange thing is, the second one gives a 'password incorrect' error
> > on login attempts, while the first one logs in fine.  I do remember
> > testing multiple consoles just fine a year and a half back, so no idea
> > why this isn't behaving as expected -- but it mostly looks like a
> > userspace issue rather than kernel one.)
> 
> Right -- when I test this on the Fedora 11 VM I used back then, the
> two consoles work just fine without these patches.  When I use
> something newer (F14), I get the weird password rejection, with and
> without your patches.

It's not a weird password rejection, it's probably not set as a secure
terminal :)

Try adding hvc1 to /etc/securetty on the guest.

-- 

Sasha.

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