This is a note to let you know that I've just added the patch titled
power: supply: generic-adc-battery: fix possible use-after-free in gab_remove()
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
power-supply-generic-adc-battery-fix-possible-use-af.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1ecef4778d5573ab088dbb0d2d3c13a77c5b0d75
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Wed Apr 7 17:17:06 2021 +0800
power: supply: generic-adc-battery: fix possible use-after-free in gab_remove()
[ Upstream commit b6cfa007b3b229771d9588970adb4ab3e0487f49 ]
This driver's remove path calls cancel_delayed_work(). However, that
function does not wait until the work function finishes. This means
that the callback function may still be running after the driver's
remove function has finished, which would result in a use-after-free.
Fix by calling cancel_delayed_work_sync(), which ensures that
the work is properly cancelled, no longer running, and unable
to re-schedule itself.
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/power/supply/generic-adc-battery.c b/drivers/power/supply/generic-adc-battery.c
index caa829738ef7..58f09314741a 100644
--- a/drivers/power/supply/generic-adc-battery.c
+++ b/drivers/power/supply/generic-adc-battery.c
@@ -382,7 +382,7 @@ static int gab_remove(struct platform_device *pdev)
}
kfree(adc_bat->psy_desc.properties);
- cancel_delayed_work(&adc_bat->bat_work);
+ cancel_delayed_work_sync(&adc_bat->bat_work);
return 0;
}
