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linux/drivers/char
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Thomas Gleixner 3c80fe4ac9 audit: Call tty_audit_push_task() outside preempt disabled 
While auditing all tasklist_lock read_lock sites I stumbled over the
following call chain:

audit_prepare_user_tty()
  read_lock(&tasklist_lock);
  tty_audit_push_task();
     mutex_lock(&buf->mutex);

     --> buf->mutex is locked with preemption disabled.

Solve this by acquiring a reference to the task struct under
rcu_read_lock and call tty_audit_push_task outside of the preempt
disabled region.

Move all code which needs to be protected by sighand lock into
tty_audit_push_task() and use lock/unlock_sighand as we do not hold
tasklist_lock.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-10-30 08:45:25 -04:00
..
agp
parisc-agp: fix missing slab.h include
2010-10-29 13:26:48 -04:00
hw_random
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
ip2
drivers/char/ip2/Makefile: replace the use of <module>-objs with <module>-y
2010-10-27 18:03:14 -07:00
ipmi
drivers/char/ipmi/Makefile: replace the use of <module>-objs with <module>-y
2010-10-27 18:03:14 -07:00
mwave
drivers/char/mwave/Makefile: clean up
2010-10-27 18:03:15 -07:00
pcmcia
drivers/char/pcmcia/ipwireless/Makefile: Makefile: replace the use of <module>-objs with <module>-y
2010-10-27 18:03:15 -07:00
rio
drivers/char/rio/Makefile: replace the use of <module>-objs with <module>-y
2010-10-27 18:03:15 -07:00
tpm
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-10-24 13:41:39 -07:00
xilinx_hwicap
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
.gitignore
…
amiserial.c
tty: icount changeover for other main devices
2010-10-22 10:20:05 -07:00
apm-emulation.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-10-24 13:41:39 -07:00
applicom.c
drivers/char/applicom.c: fix information leak to userland
2010-10-27 18:03:14 -07:00
applicom.h
…
bfin_jtag_comm.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
bfin-otp.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
briq_panel.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
bsr.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
cd1865.h
…
consolemap.c
…
cp437.uni
…
cs5535_gpio.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
cyclades.c
tty: icount changeover for other main devices
2010-10-22 10:20:05 -07:00
defkeymap.c_shipped
…
defkeymap.map
…
digi1.h
…
digiFep1.h
…
digiPCI.h
…
ds1302.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
ds1620.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
dsp56k.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
dtlk.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
efirtc.c
efirtc: explicitly set llseek to no_llseek
2009-12-16 07:19:59 -08:00
epca.c
epca: Kill the big kernel lock
2010-08-10 13:47:40 -07:00
epca.h
…
epcaconfig.h
…
generic_nvram.c
drivers: autoconvert trivial BKL users to private mutex
2010-10-05 15:01:04 +02:00
generic_serial.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
genrtc.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
hangcheck-timer.c
Input: sysrq - drop tty argument form handle_sysrq()
2010-08-21 00:34:45 -07:00
hpet.c
drivers/char/hpet.c: fix information leak to userland
2010-10-26 16:52:11 -07:00
hvc_beat.c
Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
2010-02-25 15:38:37 -08:00
hvc_console.c
drivers/char/hvc_console.c: remove unneeded __set_current_state(TASK_RUNNING)
2010-10-27 18:03:14 -07:00
hvc_console.h
hvc_console: make the ops pointer const.
2010-02-24 14:22:32 +10:30
hvc_irq.c
…
hvc_iseries.c
Merge branch 'for-next' into for-linus
2010-03-08 16:55:37 +01:00
hvc_iucv.c
[S390] hvc_iucv: do not call iucv_unregister if iucv_register failed
2010-10-25 16:10:17 +02:00
hvc_rtas.c
hvc_console: make the ops pointer const.
2010-02-24 14:22:32 +10:30
hvc_tile.c
char: hvc: check for error case
2010-10-14 14:48:12 -04:00
hvc_udbg.c
hvc_console: make the ops pointer const.
2010-02-24 14:22:32 +10:30
hvc_vio.c
hvc_console: make the ops pointer const.
2010-02-24 14:22:32 +10:30
hvc_xen.c
Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
2010-10-28 17:11:17 -07:00
hvcs.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
hvsi.c
Input: sysrq - drop tty argument form handle_sysrq()
2010-08-21 00:34:45 -07:00
i8k.c
drivers: autoconvert trivial BKL users to private mutex
2010-10-05 15:01:04 +02:00
isicom.c
isicom: kill off the BKL
2010-08-10 13:47:40 -07:00
istallion.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
Kconfig
add ttyprintk driver
2010-10-22 10:20:02 -07:00
keyboard.c
Input: add support for large scancodes
2010-09-09 22:00:50 -07:00
lp.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
Makefile
add ttyprintk driver
2010-10-22 10:20:02 -07:00
mbcs.c
drivers: autoconvert trivial BKL users to private mutex
2010-10-05 15:01:04 +02:00
mbcs.h
…
mem.c
vfs: introduce FMODE_UNSIGNED_OFFSET for allowing negative f_pos
2010-10-25 21:18:21 -04:00
misc.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
mmtimer.c
SGI Altix IA64 mmtimer: eliminate long interval timer holdoffs
2010-10-27 18:03:14 -07:00
moxa.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
moxa.h
…
mspec.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
mxser.c
drivers/char/mxser.c: fix compilation warning in mxser.c
2010-10-27 18:03:15 -07:00
mxser.h
…
n_gsm.c
drivers/char/n_gsm.c: add missing spin_unlock_irqrestore
2010-08-11 08:59:20 -07:00
n_hdlc.c
tty: replace BKL with a new tty_lock
2010-08-10 13:47:43 -07:00
n_r3964.c
Update broken web addresses in the kernel.
2010-10-18 11:03:14 +02:00
n_tty.c
tty: Add EXTPROC support for LINEMODE
2010-08-10 13:47:39 -07:00
nozomi.c
tty: icount changeover for other main devices
2010-10-22 10:20:05 -07:00
nsc_gpio.c
…
nvram.c
drivers: autoconvert trivial BKL users to private mutex
2010-10-05 15:01:04 +02:00
nwbutton.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
nwbutton.h
…
nwflash.c
drivers: autoconvert trivial BKL users to private mutex
2010-10-05 15:01:04 +02:00
pc8736x_gpio.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
ppdev.c
drivers/char/ppdev.c: fix information leak to userland
2010-10-27 18:03:14 -07:00
ps3flash.c
drop unused dentry argument to ->fsync
2010-05-27 22:05:02 -04:00
pty.c
tty: Remove __GFP_NOFAIL from tty_add_file()
2010-10-22 10:19:58 -07:00
ramoops.c
ramoops: use the platform data structure instead of module params
2010-10-27 18:03:18 -07:00
random.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
raw.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
riscom8_reg.h
…
riscom8.c
riscom8: kill use of lock_kernel
2010-08-10 13:47:40 -07:00
riscom8.h
…
rocket_int.h
…
rocket.c
drivers/char/rocket.c: release_region or error path
2010-10-27 18:03:14 -07:00
rocket.h
…
rtc.c
of/device: Replace struct of_device with struct platform_device
2010-08-06 09:25:50 -06:00
scc.h
…
scx200_gpio.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
selection.c
tty: remove tty_lock_nested
2010-08-10 13:47:44 -07:00
ser_a2232.c
headers: remove sched.h from interrupt.h
2009-10-11 11:20:58 -07:00
ser_a2232.h
…
ser_a2232fw.ax
…
ser_a2232fw.h
…
serial167.c
tty: release BTM while sleeping in block_til_ready
2010-08-10 13:47:44 -07:00
snsc_event.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
snsc.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
snsc.h
…
sonypi.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
specialix_io8.h
…
specialix.c
tty: release BTM while sleeping in block_til_ready
2010-08-10 13:47:44 -07:00
stallion.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2010-10-24 13:41:39 -07:00
sx.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
sx.h
…
sxboards.h
…
sxwindow.h
…
synclink_gt.c
drivers/char/synclink_gt.c: add extended sync feature
2010-10-27 18:03:14 -07:00
synclink.c
tty: icount changeover for other main devices
2010-10-22 10:20:05 -07:00
synclinkmp.c
tty: icount changeover for other main devices
2010-10-22 10:20:05 -07:00
sysrq.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2010-10-25 07:59:01 -07:00
tb0219.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
tlclk.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
toshiba.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
tty_audit.c
audit: Call tty_audit_push_task() outside preempt disabled
2010-10-30 08:45:25 -04:00
tty_buffer.c
tty: fix obsolete comment on tty_insert_flip_string_fixed_flag
2010-05-21 09:34:30 -07:00
tty_io.c
tty: Make tiocgicount a handler
2010-10-22 10:20:04 -07:00
tty_ioctl.c
tty: Add EXTPROC support for LINEMODE
2010-08-10 13:47:39 -07:00
tty_ldisc.c
tty: remove tty_lock_nested
2010-08-10 13:47:44 -07:00
tty_mutex.c
tty: implement BTM as mutex instead of BKL
2010-08-10 13:47:44 -07:00
tty_port.c
tty: release BTM while sleeping in block_til_ready
2010-08-10 13:47:44 -07:00
ttyprintk.c
add ttyprintk driver
2010-10-22 10:20:02 -07:00
uv_mmtimer.c
llseek: automatically add .llseek fop
2010-10-15 15:53:27 +02:00
vc_screen.c
vcs: invoke the vt update callback when /dev/vcs* is written to
2010-10-22 10:20:06 -07:00
viotape.c
Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
2010-10-22 10:52:56 -07:00
virtio_console.c
virtio: console: Disable lseek(2) for port file operations
2010-10-21 17:44:04 +10:30
vme_scc.c
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
2010-03-30 22:02:32 +09:00
vt_ioctl.c
drivers/char/vt_ioctl.c: fix VT_OPENQRY error value
2010-10-27 18:03:05 -07:00
vt.c
vcs: invoke the vt update callback when /dev/vcs* is written to
2010-10-22 10:20:06 -07:00