Thomas Gleixner 89f3232c39 alarmtimer: Init nanosleep alarm timer on stack ... commit bd03143007 upstream. syszbot reported the following debugobjects splat: ODEBUG: object is on stack, but not annotated WARNING: CPU: 0 PID: 4185 at lib/debugobjects.c:328 RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:327 [inline] debug_object_init+0x17/0x20 lib/debugobjects.c:391 debug_hrtimer_init kernel/time/hrtimer.c:410 [inline] debug_init kernel/time/hrtimer.c:458 [inline] hrtimer_init+0x8c/0x410 kernel/time/hrtimer.c:1259 alarm_init kernel/time/alarmtimer.c:339 [inline] alarm_timer_nsleep+0x164/0x4d0 kernel/time/alarmtimer.c:787 SYSC_clock_nanosleep kernel/time/posix-timers.c:1226 [inline] SyS_clock_nanosleep+0x235/0x330 kernel/time/posix-timers.c:1204 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 This happens because the hrtimer for the alarm nanosleep is on stack, but the code does not use the proper debug objects initialization. Split out the code for the allocated use cases and invoke hrtimer_init_on_stack() for the nanosleep related functions. Reported-by: syzbot+a3e0726462b2e346a31d@syzkaller.appspotmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: syzkaller-bugs@googlegroups.com Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1803261528270.1585@nanos.tec.linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-26 11:02:21 +02:00
..
alarmtimer.c	alarmtimer: Init nanosleep alarm timer on stack	2018-04-26 11:02:21 +02:00
clockevents.c
clocksource.c
hrtimer.c	hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers)	2018-03-03 10:24:21 +01:00
itimer.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
jiffies.c
Kconfig
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ntp.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ntp_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
posix-clock.c
posix-cpu-timers.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
posix-stubs.c
posix-timers.c	posix-timers: Protect posix clock array access against speculation	2018-03-28 18:24:46 +02:00
posix-timers.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sched_clock.c
test_udelay.c
tick-broadcast-hrtimer.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tick-broadcast.c
tick-common.c
tick-internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
tick-oneshot.c
tick-sched.c	nohz: Prevent a timer interrupt storm in tick_nohz_stop_sched_tick()	2018-01-02 20:31:16 +01:00
tick-sched.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
time.c
timeconst.bc
timeconv.c
timecounter.c
timekeeping.c
timekeeping.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
timekeeping_debug.c
timekeeping_internal.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
timer.c	timers: Forward timer base before migrating timers	2018-03-08 22:41:04 -08:00
timer_list.c