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linux/drivers/char
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Eric W. Biederman 98a27ba485 tty: introduce no_tty and use it in selinux 
While researching the tty layer pid leaks I found a weird case in selinux when
we drop a controlling tty because of inadequate permissions we don't do the
normal hangup processing.  Which is a problem if it happens the session leader
has exec'd something that can no longer access the tty.

We already have code in the kernel to handle this case in the form of the
TIOCNOTTY ioctl.  So this patch factors out a helper function that is the
essence of that ioctl and calls it from the selinux code.

This removes the inconsistency in handling dropping of a controlling tty and
who knows it might even make some part of user space happy because it received
a SIGHUP it was expecting.

In addition since this removes the last user of proc_set_tty outside of
tty_io.c proc_set_tty is made static and removed from tty.h

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: James Morris <jmorris@namei.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:04 -07:00
..
agp Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6 2007-05-05 14:55:20 -07:00
drm Merge branch 'drm-patches' of master.kernel.org:/pub/scm/linux/kernel/git/airlied/drm-2.6 2007-05-07 12:24:07 -07:00
hw_random Use stop_machine_run in the Intel RNG driver 2007-05-08 11:15:00 -07:00
ip2 Fix bogus 'inline' in drivers/char/ip2/i2lib.c 2007-02-21 11:18:26 -08:00
ipmi ipmi: add pci remove handling 2007-05-08 11:14:58 -07:00
mwave [PATCH] mwave: interesting flags savings 2007-02-20 17:10:14 -08:00
pcmcia PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
rio rio: typo in bitwise AND expression. 2007-02-17 18:57:09 +01:00
tpm tpm_infineon: add support for devices in mmio space 2007-05-08 11:15:02 -07:00
watchdog PCI: Cleanup the includes of <linux/pci.h> 2007-05-02 19:02:35 -07:00
.gitignore
amiserial.c [PATCH] CHAR-Amiserial: turn local_save_flags() + local_irq_disable() into local_irq_save() 2007-02-11 11:18:07 -08:00
apm-emulation.c [APM] Add shared version of APM emulation 2007-02-09 17:08:57 +00:00
applicom.c
applicom.h
briq_panel.c Revert "[POWERPC] Rename get_property to of_get_property: drivers" 2007-04-26 22:24:31 +10:00
cd1865.h
ChangeLog
consolemap.c [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
cp437.uni
cs5535_gpio.c [PATCH] struct path: convert char-drivers 2006-12-08 08:28:44 -08:00
cyclades.c cyclades: remove custom types 2007-05-08 11:15:03 -07:00
decserial.c [PATCH] dz: Fixes to make it work 2006-12-07 08:39:41 -08:00
defkeymap.c_shipped
defkeymap.map
digi1.h
digiFep1.h
digiPCI.h
ds1286.c [CHAR] ds1286: Fix handling of seconds in RTC_ALM_SET ioctl. 2007-03-08 01:10:30 +00:00
ds1302.c [PATCH] DS1302: local_irq_disable() is redundant after local_irq_save() 2007-02-12 09:48:30 -08:00
ds1620.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
dsp56k.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
dtlk.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
ec3104_keyb.c
efirtc.c
epca.c [PATCH] char/epca.c: remove unused function 2007-03-05 07:57:53 -08:00
epca.h
epcaconfig.h
esp.c [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
generic_nvram.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
generic_serial.c [PATCH] generic_serial: fix decoding of baud rate 2007-03-27 09:05:15 -07:00
genrtc.c WorkStruct: make allyesconfig 2006-11-22 14:57:56 +00:00
hangcheck-timer.c [PATCH] time: x86_64: convert x86_64 to use GENERIC_TIME 2007-02-16 08:14:00 -08:00
hpet.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
hvc_beat.c [POWERPC] Celleb: hypervisor console driver 2007-02-07 14:03:21 +11:00
hvc_console.c drivers/char/hvc_console.c: cleanups 2007-05-08 11:14:59 -07:00
hvc_console.h
hvc_iseries.c [POWERPC] Rename get_property to of_get_property: partial drivers 2007-04-27 15:51:56 +10:00
hvc_rtas.c
hvc_vio.c [POWERPC] Rename get_property to of_get_property: partial drivers 2007-04-27 15:51:56 +10:00
hvcs.c [PATCH] tty: switch to ktermios 2006-12-08 08:28:57 -08:00
hvsi.c [POWERPC] Rename get_property to of_get_property: partial drivers 2007-04-27 15:51:56 +10:00
i8k.c
ip27-rtc.c
isicom.c [PATCH] Char: tty_wakeup cleanup 2007-02-11 10:51:26 -08:00
istallion.c [PATCH] Char: tty_wakeup cleanup 2007-02-11 10:51:26 -08:00
Kconfig rename TANBAC TB0219 config 2007-05-07 12:13:04 -07:00
keyboard.c Input: keyboard handler - use printk_ratelimit() 2007-04-12 01:30:52 -04:00
lcd.c [CHAR] lcd: Fix two warnings. 2007-03-17 01:03:26 +00:00
lcd.h [MIPS] Add MTD device support for Cobalt 2007-02-20 17:11:55 +00:00
lp.c [PATCH] getting rid of all casts of k[cmz]alloc() calls 2006-12-13 09:05:58 -08:00
Makefile rename TANBAC TB0219 config 2007-05-07 12:13:04 -07:00
mbcs.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
mbcs.h
mem.c fix bogon in /dev/mem mmap'ing on nommu 2007-04-17 16:36:27 -07:00
misc.c [PATCH] Correct misc_register return code handling in several drivers 2006-12-07 08:39:35 -08:00
mmtimer.c [PATCH] Correct misc_register return code handling in several drivers 2006-12-07 08:39:35 -08:00
moxa.c [PATCH] Char: moxa, pci probing 2007-02-11 10:51:30 -08:00
mspec.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
mxser_new.c Char: mxser_new, fix TIOCMIWAIT 2007-04-24 08:23:07 -07:00
mxser_new.h [PATCH] Char: mxser_new, upgrade to 1.9.15 2007-02-11 10:51:29 -08:00
mxser.c Char: mxser, fix TIOCMIWAIT 2007-04-24 08:23:08 -07:00
mxser.h [PATCH] mxser: remove ambiguous redefinition of INIT_WORK 2007-02-11 10:51:25 -08:00
n_hdlc.c
n_r3964.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
n_tty.c [PATCH] tty: update the tty layer to work with struct pid 2007-02-12 09:48:32 -08:00
nsc_gpio.c [PATCH] struct path: convert char-drivers 2006-12-08 08:28:44 -08:00
nvram.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
nwbutton.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
nwbutton.h
nwflash.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
pc8736x_gpio.c
ppdev.c [PATCH] struct path: convert char-drivers 2006-12-08 08:28:44 -08:00
pty.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
random.c [NET]: random functions can use nsec resolution instead of usec 2007-04-25 22:28:25 -07:00
raw.c [PATCH] raw: don't allow the creation of a raw device with minor number 0 2007-02-11 10:51:34 -08:00
riscom8_reg.h
riscom8.c [PATCH] Char: tty_wakeup cleanup 2007-02-11 10:51:26 -08:00
riscom8.h
rocket_int.h
rocket.c rocket: remove modversions include 2007-05-08 11:15:02 -07:00
rocket.h
rtc.c [PATCH] sysctl: remove insert_at_head from register_sysctl 2007-02-14 08:09:59 -08:00
scc.h
scx200_gpio.c
selection.c
ser_a2232.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
ser_a2232.h
ser_a2232fw.ax
ser_a2232fw.h
serial167.c [PATCH] Char: serial167, cleanup 2007-02-11 10:51:28 -08:00
snsc_event.c
snsc.c
snsc.h
sonypi.c sonypi: use mutex instead of semaphore 2007-04-28 22:13:34 -04:00
specialix_io8.h
specialix.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
stallion.c [PATCH] Char: stallion, use dynamic dev 2006-12-08 08:28:59 -08:00
sx.c [PATCH] sx: fix non-PCI build 2006-12-13 09:05:49 -08:00
sx.h [PATCH] Char: sx, request regions 2006-12-08 08:28:59 -08:00
sxboards.h
sxwindow.h
synclink_gt.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
synclink.c drivers/char/synclink.c: check kmalloc() return value 2007-05-08 11:15:02 -07:00
synclinkmp.c [PATCH] Char: timers cleanup 2007-02-12 09:48:30 -08:00
sysrq.c [PATCH] Add SysRq-Q to print timer_list debug info 2007-02-16 08:13:59 -08:00
tb0219.c [PATCH] struct path: convert char-drivers 2006-12-08 08:28:44 -08:00
tipar.c [PATCH] struct path: convert char-drivers 2006-12-08 08:28:44 -08:00
tlclk.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
toshiba.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
tty_io.c tty: introduce no_tty and use it in selinux 2007-05-08 11:15:04 -07:00
tty_ioctl.c [PATCH] tty: improve encode_baud_rate logic 2007-02-11 10:51:32 -08:00
vc_screen.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
viocons.c [POWERPC] iSeries: fix viocons init 2006-12-20 16:37:48 +11:00
viotape.c [PATCH] mark struct file_operations const 3 2007-02-12 09:48:45 -08:00
vme_scc.c [PATCH] remove many unneeded #includes of sched.h 2007-02-14 08:09:54 -08:00
vr41xx_giu.c [MIPS] Vr41xx: Fix after GENERIC_HARDIRQS_NO__DO_IRQ change 2007-01-23 18:26:47 +00:00
vt_ioctl.c [PATCH] vt: fix potential race in VT_WAITACTIVE handler 2007-04-02 10:06:09 -07:00
vt.c [PATCH] Initialise SAK member for each virtual console to prevent oops 2007-03-16 19:25:06 -07:00