lkml.org 
[lkml]   [2021]   [Jul]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5.10 077/125] thermal/core/thermal_of: Stop zone device before unregistering it
Date
From: Dmitry Osipenko <digetx@gmail.com>

[ Upstream commit 5e5c9f9a75fc4532980c2e699caf8a36070a3a2e ]

Zone device is enabled after thermal_zone_of_sensor_register() completion,
but it's not disabled before senor is unregistered, leaving temperature
polling active. This results in accessing a disabled zone device and
produces a warning about this problem. Stop zone device before
unregistering it in order to fix this "use-after-free" problem.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210616190417.32214-3-digetx@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/thermal/thermal_of.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 5b76f9a1280d..6379f26a335f 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -559,6 +559,9 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
if (!tz)
return;

+ /* stop temperature polling */
+ thermal_zone_device_disable(tzd);
+
mutex_lock(&tzd->lock);
tzd->ops->get_temp = NULL;
tzd->ops->get_trend = NULL;
--
2.30.2


\
 
 \ /
  Last update: 2021-07-22 19:14    [W:0.358 / U:0.264 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site