linux-kernel - Re: [PATCH] serial: forbid 8250 on s390

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]

Message-ID: <20171212084808.GA14030@kroah.com>
Date:   Tue, 12 Dec 2017 09:48:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Christian Borntraeger <borntraeger@...ibm.com>
Cc:     Jiri Slaby <jslaby@...e.com>, linux-serial@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] serial: forbid 8250 on s390

On Tue, Dec 12, 2017 at 09:08:35AM +0100, Christian Borntraeger wrote:
> Using "make kvmconfig" results in a potentially unusable linux image
> on s390.  The reason is that both the (default on s390) sclp consoles
> as well as the 8250 console register a ttyS<x> as console. Since there
> will be no 8250 on s390 let's fence 8250. This will ensure that there
> is always a working sclp console.
> 
> Reported-by: Alice Frosi <alice@...ux.vnet.ibm.com>
> Signed-off-by: Christian Borntraeger <borntraeger@...ibm.com>
> Reviewed-by: Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
> ---
>  drivers/tty/serial/8250/Kconfig | 1 +
>  1 file changed, 1 insertion(+)

Does this need to be backported to any stable kernels?  Or does anyone
who runs them on s390 already have this config option disabled?

thanks,

greg k-h