Wei Wang fe46db764f thermal: Fix deadlock in thermal thermal_zone_device_check ... commit 163b00cde7cf2206e248789d2780121ad5e6a70b upstream. 1851799e1d29 ("thermal: Fix use-after-free when unregistering thermal zone device") changed cancel_delayed_work to cancel_delayed_work_sync to avoid a use-after-free issue. However, cancel_delayed_work_sync could be called insides the WQ causing deadlock. [54109.642398] c0 1162 kworker/u17:1 D 0 11030 2 0x00000000 [54109.642437] c0 1162 Workqueue: thermal_passive_wq thermal_zone_device_check [54109.642447] c0 1162 Call trace: [54109.642456] c0 1162 __switch_to+0x138/0x158 [54109.642467] c0 1162 __schedule+0xba4/0x1434 [54109.642480] c0 1162 schedule_timeout+0xa0/0xb28 [54109.642492] c0 1162 wait_for_common+0x138/0x2e8 [54109.642511] c0 1162 flush_work+0x348/0x40c [54109.642522] c0 1162 __cancel_work_timer+0x180/0x218 [54109.642544] c0 1162 handle_thermal_trip+0x2c4/0x5a4 [54109.642553] c0 1162 thermal_zone_device_update+0x1b4/0x25c [54109.642563] c0 1162 thermal_zone_device_check+0x18/0x24 [54109.642574] c0 1162 process_one_work+0x3cc/0x69c [54109.642583] c0 1162 worker_thread+0x49c/0x7c0 [54109.642593] c0 1162 kthread+0x17c/0x1b0 [54109.642602] c0 1162 ret_from_fork+0x10/0x18 [54109.643051] c0 1162 kworker/u17:2 D 0 16245 2 0x00000000 [54109.643067] c0 1162 Workqueue: thermal_passive_wq thermal_zone_device_check [54109.643077] c0 1162 Call trace: [54109.643085] c0 1162 __switch_to+0x138/0x158 [54109.643095] c0 1162 __schedule+0xba4/0x1434 [54109.643104] c0 1162 schedule_timeout+0xa0/0xb28 [54109.643114] c0 1162 wait_for_common+0x138/0x2e8 [54109.643122] c0 1162 flush_work+0x348/0x40c [54109.643131] c0 1162 __cancel_work_timer+0x180/0x218 [54109.643141] c0 1162 handle_thermal_trip+0x2c4/0x5a4 [54109.643150] c0 1162 thermal_zone_device_update+0x1b4/0x25c [54109.643159] c0 1162 thermal_zone_device_check+0x18/0x24 [54109.643167] c0 1162 process_one_work+0x3cc/0x69c [54109.643177] c0 1162 worker_thread+0x49c/0x7c0 [54109.643186] c0 1162 kthread+0x17c/0x1b0 [54109.643195] c0 1162 ret_from_fork+0x10/0x18 [54109.644500] c0 1162 cat D 0 7766 1 0x00000001 [54109.644515] c0 1162 Call trace: [54109.644524] c0 1162 __switch_to+0x138/0x158 [54109.644536] c0 1162 __schedule+0xba4/0x1434 [54109.644546] c0 1162 schedule_preempt_disabled+0x80/0xb0 [54109.644555] c0 1162 __mutex_lock+0x3a8/0x7f0 [54109.644563] c0 1162 __mutex_lock_slowpath+0x14/0x20 [54109.644575] c0 1162 thermal_zone_get_temp+0x84/0x360 [54109.644586] c0 1162 temp_show+0x30/0x78 [54109.644609] c0 1162 dev_attr_show+0x5c/0xf0 [54109.644628] c0 1162 sysfs_kf_seq_show+0xcc/0x1a4 [54109.644636] c0 1162 kernfs_seq_show+0x48/0x88 [54109.644656] c0 1162 seq_read+0x1f4/0x73c [54109.644664] c0 1162 kernfs_fop_read+0x84/0x318 [54109.644683] c0 1162 __vfs_read+0x50/0x1bc [54109.644692] c0 1162 vfs_read+0xa4/0x140 [54109.644701] c0 1162 SyS_read+0xbc/0x144 [54109.644708] c0 1162 el0_svc_naked+0x34/0x38 [54109.845800] c0 1162 D 720.000s 1->7766->7766 cat [panic] Fixes: 1851799e1d29 ("thermal: Fix use-after-free when unregistering thermal zone device") Cc: stable@vger.kernel.org Signed-off-by: Wei Wang <wvw@google.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-12-13 08:52:50 +01:00
..
broadcom	thermal: bcm2835: Fix crash in bcm2835_thermal_debugfs	2019-04-20 09:15:56 +02:00
int340x_thermal	thermal/int340x_thermal: fix mode setting	2019-04-20 09:15:56 +02:00
qcom	drivers: thermal: tsens: Don't print error message on -EPROBE_DEFER	2019-06-15 11:54:02 +02:00
samsung	thermal: samsung: Fix incorrect check after code merge	2019-04-20 09:15:56 +02:00
st
tegra
ti-soc-thermal
armada_thermal.c	thermal: armada: fix a test in probe()	2019-12-01 09:16:54 +01:00
clock_cooling.c
cpu_cooling.c
da9062-thermal.c
db8500_thermal.c
devfreq_cooling.c
dove_thermal.c
fair_share.c
gov_bang_bang.c
hisi_thermal.c
imx_thermal.c
intel_bxt_pmic_thermal.c
intel_pch_thermal.c
intel_powerclamp.c	thermal/intel_powerclamp: fix truncated kthread name	2019-04-20 09:15:56 +02:00
intel_quark_dts_thermal.c
intel_soc_dts_iosf.c
intel_soc_dts_iosf.h
intel_soc_dts_thermal.c	x86/cpu: Sanitize FAM6_ATOM naming	2019-05-14 19:17:53 +02:00
Kconfig
kirkwood_thermal.c
Makefile
max77620_thermal.c
mtk_thermal.c
of-thermal.c
power_allocator.c
qcom-spmi-temp-alarm.c
qoriq_thermal.c
rcar_gen3_thermal.c	thermal: rcar_gen3_thermal: disable interrupt in .remove	2019-06-15 11:54:02 +02:00
rcar_thermal.c	thermal: rcar_thermal: Prevent hardware access during system suspend	2019-12-01 09:17:00 +01:00
rockchip_thermal.c
spear_thermal.c
step_wise.c
tango_thermal.c
thermal_core.c	thermal: Fix deadlock in thermal thermal_zone_device_check	2019-12-13 08:52:50 +01:00
thermal_core.h
thermal_helpers.c
thermal_hwmon.c	thermal_hwmon: Sanitize thermal_zone type	2019-10-11 18:21:19 +02:00
thermal_hwmon.h	thermal: hwmon: inline helpers when CONFIG_THERMAL_HWMON is not set	2019-02-12 19:47:21 +01:00
thermal_sysfs.c
thermal-generic-adc.c
uniphier_thermal.c
user_space.c
x86_pkg_temp_thermal.c
zx2967_thermal.c