| 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
| ||
|
Message-ID: <CA+5PVA72=8KvdOgTLc7NZfMq_bFob6-rEhTktNJJ0qBRgr4iiQ@mail.gmail.com>
Date: Fri, 21 Feb 2014 09:46:34 -0500
From: Josh Boyer <jwboyer@...oraproject.org>
To: Ray Strode <halfline@...il.com>
Cc: Luis Henriques <luis.henriques@...onical.com>,
"Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
"stable@...r.kernel.org" <stable@...r.kernel.org>,
Ubuntu kernel team <kernel-team@...ts.ubuntu.com>,
Lennart Poettering <lennart@...ttering.net>,
Kay Sievers <kay@...y.org>, Jiri Slaby <jslaby@...e.cz>,
David Herrmann <dh.herrmann@...il.com>,
Werner Fink <werner@...e.de>, Hannes Reinecke <hare@...e.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 3.11 085/121] tty: Set correct tty name in 'active' sysfs attribute
On Fri, Feb 21, 2014 at 9:37 AM, Ray Strode <halfline@...il.com> wrote:
> Hi,
>
> This broke plymouth, i think. Plymouth used the herustic:
> "/sys/class/tty/console/active contains something other than tty0" to
> mean "probably has serial consoles, force verbose messages instead of
> a splash screen". Now on a normal system it contains tty1.
>
> I pushed a commit to plymouth that gets it working again, but it could
> cause compatiblity concerns if new kernels are pushed to old releases.
Hm. Breaking userspace is probably a bad thing here.
Greg, you have this queued for 3.13.5 at the moment. Maybe we should
hold off on this one until this discussion is sorted out?
josh
> On Fri, Feb 21, 2014 at 7:48 AM, Luis Henriques
> <luis.henriques@...onical.com> wrote:
>> 3.11.10.5 -stable review patch. If anyone has any objections, please let me know.
>>
>> ------------------
>>
>> From: Hannes Reinecke <hare@...e.de>
>>
>> commit d8a5dc3033af2fd6d16030d2ee4fbd073460fe54 upstream.
>>
>> The 'active' sysfs attribute should refer to the currently active tty
>> devices the console is running on, not the currently active console.
>>
>> The console structure doesn't refer to any device in sysfs, only the tty
>> the console is running on has. So we need to print out the tty names in
>> 'active', not the console names.
>>
>> This resolves an issue on s390 platforms in determining the correct
>> console device to use.
>>
>> Cc: Lennart Poettering <lennart@...ttering.net>
>> Cc: Kay Sievers <kay@...y.org>
>> Cc: Jiri Slaby <jslaby@...e.cz>
>> Cc: David Herrmann <dh.herrmann@...il.com>
>> Signed-off-by: Werner Fink <werner@...e.de>
>> Signed-off-by: Hannes Reinecke <hare@...e.de>
>> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
>> ---
>> Documentation/ABI/testing/sysfs-tty | 3 ++-
>> drivers/tty/tty_io.c | 25 ++++++++++++++++++-------
>> 2 files changed, 20 insertions(+), 8 deletions(-)
>>
>> diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty
>> index ad22fb0..a2ccec3 100644
>> --- a/Documentation/ABI/testing/sysfs-tty
>> +++ b/Documentation/ABI/testing/sysfs-tty
>> @@ -3,7 +3,8 @@ Date: Nov 2010
>> Contact: Kay Sievers <kay.sievers@...y.org>
>> Description:
>> Shows the list of currently configured
>> - console devices, like 'tty1 ttyS0'.
>> + tty devices used for the console,
>> + like 'tty1 ttyS0'.
>> The last entry in the file is the active
>> device connected to /dev/console.
>> The file supports poll() to detect virtual
>> diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
>> index 20689b9..ced6b3e 100644
>> --- a/drivers/tty/tty_io.c
>> +++ b/drivers/tty/tty_io.c
>> @@ -1263,16 +1263,17 @@ static void pty_line_name(struct tty_driver *driver, int index, char *p)
>> * @p: output buffer of at least 7 bytes
>> *
>> * Generate a name from a driver reference and write it to the output
>> - * buffer.
>> + * buffer. Return the number of bytes written.
>> *
>> * Locking: None
>> */
>> -static void tty_line_name(struct tty_driver *driver, int index, char *p)
>> +static ssize_t tty_line_name(struct tty_driver *driver, int index, char *p)
>> {
>> if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE)
>> - strcpy(p, driver->name);
>> + return sprintf(p, "%s", driver->name);
>> else
>> - sprintf(p, "%s%d", driver->name, index + driver->name_base);
>> + return sprintf(p, "%s%d", driver->name,
>> + index + driver->name_base);
>> }
>>
>> /**
>> @@ -3539,9 +3540,19 @@ static ssize_t show_cons_active(struct device *dev,
>> if (i >= ARRAY_SIZE(cs))
>> break;
>> }
>> - while (i--)
>> - count += sprintf(buf + count, "%s%d%c",
>> - cs[i]->name, cs[i]->index, i ? ' ':'\n');
>> + while (i--) {
>> + struct tty_driver *driver;
>> + const char *name = cs[i]->name;
>> + int index = cs[i]->index;
>> +
>> + driver = cs[i]->device(cs[i], &index);
>> + if (driver) {
>> + count += tty_line_name(driver, index, buf + count);
>> + count += sprintf(buf + count, "%c", i ? ' ':'\n');
>> + } else
>> + count += sprintf(buf + count, "%s%d%c",
>> + name, index, i ? ' ':'\n');
>> + }
>> console_unlock();
>>
>> return count;
>> --
>> 1.9.0
>>
>> --
>> 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/
> --
> To unsubscribe from this list: send the line "unsubscribe stable" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
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/
Powered by blists - more mailing lists