linux-kernel - Re: Side effect of pressing special keys

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

Date:	Wed, 03 Dec 2014 14:38:15 +0100
From:	Gabriele Mazzotta <gabriele.mzt@...il.com>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Pavel Machek <pavel@....cz>, linux-input@...r.kernel.org,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Side effect of pressing special keys

On Wednesday 03 December 2014 14:24:11 Pali Rohár wrote:
> On Wednesday 03 December 2014 14:12:54 Henrique de Moraes
> 
> Holschuh wrote:
> > On Wed, 03 Dec 2014, Pali Rohár wrote:
> > > Ok, and what about KEY_KBDILLUMTOGGLE when bios also handle
> > > keyboard backlight level? Should be this key filtered too?
> > 
> > IME, heck yes.
> > 
> > If you ever make the mistake of sending to userspace something
> > the BIOS/kernel already reacted to, they will find a way to
> > loop it back to you and cause all sort of issues.
> 
> Ok, I think same. In KDE4 I see some loop/noop operation when new
> dell keyboard backlight driver is used. Key KEY_KBDILLUMTOGGLE
> cause that BIOS change brightness and also KDE4 see it and change
> it too...
> 
> Similar problem there is with KEY_WLAN and NetworkManager.
> 
> Gabriele, can you create patch which disable both KEY_WLAN and
> KEY_KBDILLUMTOGGLE in dell-wmi.c driver?

KEY_KBDILLUMTOGGLE is actually disabled already, but KEY_WLAN (which
I guess it should changed to KEY_RFKILL now that it exists) isn't, so
I will submit a patch. The comment above it in dell-wmi.c makes me think
that for all the systems the BIOS does everything and not only mine.

Gabriele
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/