Joonyoung Shim bc7c36eedb clocksource/exynos_mct: Clear interrupt when cpu is shut down ...

When a CPU goes offline a potentially pending timer interrupt is not
cleared. When the CPU comes online again then the pending interrupt is
delivered before the per cpu clockevent device is initialized. As a
consequence the tick interrupt handler dereferences a NULL pointer.

[   51.251378] Unable to handle kernel NULL pointer dereference at virtual address 00000040
[   51.289348] task: ee942d00 task.stack: ee960000
[   51.293861] PC is at tick_periodic+0x38/0xb0
[   51.298102] LR is at tick_handle_periodic+0x1c/0x90

Clear the pending interrupt in the cpu dying path.

Fixes: 56a94f1391 ("clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier")
Reported-by: Seung-Woo Kim <[email protected]>
Signed-off-by: Joonyoung Shim <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

2017-01-17 10:08:38 +01:00

..

acpi_pm.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

arc_timer.c

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

2016-12-25 14:30:04 -08:00

arm_arch_timer.c

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

2016-12-25 14:30:04 -08:00

arm_global_timer.c

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

2016-12-25 14:30:04 -08:00

armv7m_systick.c

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asm9260_timer.c

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bcm2835_timer.c

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bcm_kona_timer.c

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cadence_ttc_timer.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

clksrc_st_lpc.c

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clksrc-dbx500-prcmu.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

clksrc-probe.c

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clps711x-timer.c

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cs5535-clockevt.c

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dummy_timer.c

cpu/hotplug: Cleanup state names

2016-12-25 10:47:44 +01:00

dw_apb_timer_of.c

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dw_apb_timer.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

em_sti.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

exynos_mct.c

clocksource/exynos_mct: Clear interrupt when cpu is shut down

2017-01-17 10:08:38 +01:00

fsl_ftm_timer.c

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h8300_timer8.c

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h8300_timer16.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

h8300_tpu.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

i8253.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

jcore-pit.c

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

2016-12-25 14:30:04 -08:00

Kconfig

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Makefile

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meson6_timer.c

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metag_generic.c

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

2016-12-25 14:30:04 -08:00

mips-gic-timer.c

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

2016-12-25 14:30:04 -08:00

mmio.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

moxart_timer.c

clocksource/drivers/moxart: Plug memory and mapping leaks

2016-12-19 11:19:57 +01:00

mps2-timer.c

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mtk_timer.c

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mxs_timer.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

nomadik-mtu.c

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numachip.c

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pxa_timer.c

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qcom-timer.c

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

2016-12-25 14:30:04 -08:00

rockchip_timer.c

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samsung_pwm_timer.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

scx200_hrt.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

sh_cmt.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

sh_mtu2.c

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sh_tmu.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

sun4i_timer.c

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tango_xtal.c

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tcb_clksrc.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

tegra20_timer.c

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time-armada-370-xp.c

cpu/hotplug: Cleanup state names

2016-12-25 10:47:44 +01:00

time-efm32.c

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time-lpc32xx.c

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time-orion.c

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time-pistachio.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-atlas7.c

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

2016-12-25 14:30:04 -08:00

timer-atmel-pit.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-atmel-st.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-digicolor.c

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timer-imx-gpt.c

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timer-integrator-ap.c

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timer-keystone.c

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timer-nps.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-oxnas-rps.c

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timer-prima2.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-sp804.c

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timer-sp.h

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timer-stm32.c

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timer-sun5i.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-ti-32k.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

timer-u300.c

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versatile.c

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vf_pit_timer.c

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vt8500_timer.c

clocksource: Use a plain u64 instead of cycle_t

2016-12-25 11:04:12 +01:00

zevio-timer.c

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