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From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Zhang Rui <rui.zhang@intel.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Amit Kucheria <amitk@kernel.org>,
	Andreas Westman Dorcsak <hedmoo@yahoo.com>,
	Maxim Schwalm <maxim.schwalm@gmail.com>,
	Svyatoslav Ryhel <clamor95@gmail.com>,
	Ihor Didenko <tailormoon@rambler.ru>,
	Ion Agorria <ion@agorria.com>,
	Matt Merhar <mattmerhar@protonmail.com>,
	Peter Geis <pgwipeout@gmail.com>
Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: [PATCH v4 2/6] thermal: thermal_of: Stop zone device before unregistering it
Date: Wed, 16 Jun 2021 22:04:13 +0300	[thread overview]
Message-ID: <20210616190417.32214-3-digetx@gmail.com> (raw)
In-Reply-To: <20210616190417.32214-1-digetx@gmail.com>

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>
---
 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


  parent reply	other threads:[~2021-06-16 19:05 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-16 19:04 [PATCH v4 0/6] Add driver for NVIDIA Tegra30 SoC Thermal sensor Dmitry Osipenko
2021-06-16 19:04 ` [PATCH v4 1/6] dt-bindings: thermal: Add binding for Tegra30 thermal sensor Dmitry Osipenko
2021-06-21  9:46   ` [thermal: thermal/next] " thermal-bot for Dmitry Osipenko
2021-07-04 18:02   ` thermal-bot for Dmitry Osipenko
2021-06-16 19:04 ` Dmitry Osipenko [this message]
2021-06-21  9:46   ` [thermal: thermal/next] thermal/core/thermal_of: Stop zone device before unregistering it thermal-bot for Dmitry Osipenko
2021-07-04 18:02   ` thermal-bot for Dmitry Osipenko
2021-06-16 19:04 ` [PATCH v4 3/6] thermal/drivers/tegra: Add driver for Tegra30 thermal sensor Dmitry Osipenko
2021-06-21  9:46   ` [thermal: thermal/next] " thermal-bot for Dmitry Osipenko
2021-09-09 14:38   ` thermal-bot for Dmitry Osipenko
2021-06-16 19:04 ` [PATCH v4 4/6] ARM: tegra_defconfig: Enable CONFIG_TEGRA30_TSENSOR Dmitry Osipenko
2021-06-16 19:04 ` [PATCH v4 5/6] ARM: multi_v7_defconfig: " Dmitry Osipenko
2021-06-16 19:04 ` [PATCH v4 6/6] ARM: tegra: Add SoC thermal sensor to Tegra30 device-trees Dmitry Osipenko
2021-06-21 17:13 ` [PATCH v4 0/6] Add driver for NVIDIA Tegra30 SoC Thermal sensor Daniel Lezcano
2021-06-21 17:26   ` Dmitry Osipenko
2021-06-21 18:16     ` Daniel Lezcano
2021-06-21 18:25       ` Dmitry Osipenko

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