Thomas Gleixner 6053479cbb tick/broadcast: Prevent NULL pointer dereference ...

commit c1a9eeb938 upstream.

When a disfunctional timer, e.g. dummy timer, is installed, the tick core
tries to setup the broadcast timer.

If no broadcast device is installed, the kernel crashes with a NULL pointer
dereference in tick_broadcast_setup_oneshot() because the function has no
sanity check.

Reported-by: Mason <slash.tmp@free.fr>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: Richard Cochran <rcochran@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Cc: Sebastian Frias <sf84@laposte.net>
Cc: Thibaud Cornic <thibaud_cornic@sigmadesigns.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Link: http://lkml.kernel.org/r/1147ef90-7877-e4d2-bb2b-5c4fa8d3144b@free.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-01-12 11:22:51 +01:00

..

alarmtimer.c

…

clockevents.c

clockevents: Remove unused set_mode() callback

2015-09-14 11:00:55 +02:00

clocksource.c

clocksource: Allow unregistering the watchdog

2016-09-15 08:27:47 +02:00

hrtimer.c

hrtimer: Catch illegal clockids

2016-09-15 08:27:44 +02:00

itimer.c

itimers: Handle relative timers with CONFIG_TIME_LOW_RES proper

2016-02-25 12:01:25 -08:00

jiffies.c

…

Kconfig

rcu: Drop RCU_USER_QS in favor of NO_HZ_FULL

2015-07-06 13:52:18 -07:00

Makefile

time: Remove development rules from Kbuild/Makefile

2015-07-01 09:57:35 +02:00

ntp_internal.h

ntp/pps: use timespec64 for hardpps()

2015-10-01 09:57:59 -07:00

ntp.c

ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO

2016-09-15 08:27:47 +02:00

posix-clock.c

posix-clock: Fix return code on the poll method's error path

2016-03-03 15:07:15 -08:00

posix-cpu-timers.c

posix_cpu_timer: Exit early when process has been reaped

2016-08-10 11:49:29 +02:00

posix-timers.c

posix-timers: Handle relative timers with CONFIG_TIME_LOW_RES proper

2016-02-25 12:01:25 -08:00

sched_clock.c

…

test_udelay.c

…

tick-broadcast-hrtimer.c

kernel: broadcast-hrtimer: Migrate to new 'set-state' interface

2015-08-10 11:41:08 +02:00

tick-broadcast.c

tick/broadcast: Prevent NULL pointer dereference

2017-01-12 11:22:51 +01:00

tick-common.c

clockevents: Remove unused set_mode() callback

2015-09-14 11:00:55 +02:00

tick-internal.h

…

tick-oneshot.c

…

tick-sched.c

tick/nohz: Set the correct expiry when switching to nohz/lowres mode

2016-03-03 15:07:26 -08:00

tick-sched.h

tick/broadcast: Make idle check independent from mode and config

2015-07-07 18:46:47 +02:00

time.c

Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-09-01 14:04:50 -07:00

timeconst.bc

timeconst: Update path in comment

2015-10-26 10:06:06 +09:00

timeconv.c

…

timecounter.c

…

timekeeping_debug.c

timekeeping: Cap array access in timekeeping_debug

2016-09-15 08:27:52 +02:00

timekeeping_internal.h

…

timekeeping.c

timekeeping_Force_unsigned_clocksource_to_nanoseconds_conversion

2017-01-09 08:07:43 +01:00

timekeeping.h

…

timer_list.c

hrtimer: Handle remaining time proper for TIME_LOW_RES

2016-02-17 12:30:57 -08:00

timer_stats.c

…

timer.c

timers: Use proper base migration in add_timer_on()

2015-11-04 20:23:19 +01:00