Jiri Slaby b0de59b573 TTY: do not update atime/mtime on read/write ...

On http://vladz.devzero.fr/013_ptmx-timing.php, we can see how to find
out length of a password using timestamps of /dev/ptmx. It is
documented in "Timing Analysis of Keystrokes and Timing Attacks on
SSH". To avoid that problem, do not update time when reading
from/writing to a TTY.

I am afraid of regressions as this is a behavior we have since 0.97
and apps may expect the time to be current, e.g. for monitoring
whether there was a change on the TTY. Now, there is no change. So
this would better have a lot of testing before it goes upstream.

References: CVE-2013-0160

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: stable <stable@vger.kernel.org> # after 3.9 is out
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2013-02-15 10:52:36 -08:00

..

hvc

tty: Added a CONFIG_TTY option to allow removal of TTY

2013-01-18 16:15:27 -08:00

ipwireless

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

serial

serial: imx: Fix recursive locking bug

2013-02-14 12:17:20 -08:00

vt

TTY: switch tty_schedule_flip

2013-01-15 22:43:15 -08:00

amiserial.c

tty: Remove ancient hardpps()

2013-02-13 10:17:06 -08:00

bfin_jtag_comm.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

cyclades.c

cyclades: push down tty_port_tty_get

2013-01-15 22:43:15 -08:00

ehv_bytechan.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

goldfish.c

goldfish: move to tty_port for flip buffers

2013-01-25 08:09:38 -08:00

isicom.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

Kconfig

tty: metag_da: Add metag DA TTY driver

2013-02-06 11:10:17 -08:00

Makefile

tty: metag_da: Add metag DA TTY driver

2013-02-06 11:10:17 -08:00

metag_da.c

tty: metag_da: avoid getting tty kref in dashtty_timer()

2013-02-06 11:10:17 -08:00

moxa.c

TTY: switch tty_schedule_flip

2013-01-15 22:43:15 -08:00

moxa.h

…

mxser.c

TTY: switch tty_flip_buffer_push

2013-01-15 22:30:15 -08:00

mxser.h

…

n_gsm.c

tty: Prevent deadlock in n_gsm driver

2013-01-30 12:10:09 +01:00

n_hdlc.c

…

n_r3964.c

tty: localise the lock

2012-08-10 12:55:47 -07:00

n_tracerouter.c

…

n_tracesink.c

…

n_tracesink.h

…

n_tty.c

pps: Move timestamp read into PPS code proper

2013-02-13 10:13:58 -08:00

nozomi.c

TTY: nozomi, remove dead code

2013-01-15 22:43:16 -08:00

pty.c

pty: Ignore slave open count for master pty open

2013-02-04 15:40:29 -08:00

rocket_int.h

…

rocket.c

tty: rocket: Explicitly list supported PCI IDs

2013-01-17 17:28:39 -08:00

rocket.h

…

synclink_gt.c

TTY: synclink: Convert + to | for bit operations

2013-01-30 00:09:58 -05:00

synclink.c

TTY: synclink: Convert + to | for bit operations

2013-01-30 00:09:58 -05:00

synclinkmp.c

TTY: synclink: Convert + to | for bit operations

2013-01-30 00:09:58 -05:00

sysrq.c

mm, oom: ensure sysrq+f always passes valid zonelist

2012-11-15 17:13:48 -08:00

tty_audit.c

TTY: audit, stop accessing tty->icount

2012-10-22 16:50:54 -07:00

tty_buffer.c

pps: Move timestamp read into PPS code proper

2013-02-13 10:13:58 -08:00

tty_io.c

TTY: do not update atime/mtime on read/write

2013-02-15 10:52:36 -08:00

tty_ioctl.c

tty: set_termios/set_termiox should not return -EINTR

2013-02-04 15:02:14 -08:00

tty_ldisc.c

tty: don't deadlock while flushing workqueue

2013-01-15 23:07:15 -08:00

tty_mutex.c

tty: tty_mutex.c: Fixed coding style warning (using printk)

2012-10-24 11:34:51 -07:00

tty_port.c

TTY: introduce tty_port_destroy

2012-11-15 17:20:58 -08:00