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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2015-02-20 16:32:22 +0300
committerSebastian Reichel <sre@kernel.org>2015-02-26 00:18:18 +0300
commit68c3ed6fa7e0d69529ced772d650ab128916a81d (patch)
tree1f6cf0b960169927fe87debf42ed2aac325bf5dc /drivers/power
parentcc6405667c633383cf9365731ad91e8a88d39b89 (diff)
downloadlinux-68c3ed6fa7e0d69529ced772d650ab128916a81d.tar.xz
power_supply: twl4030_madc: Check return value of power_supply_register
The return value of power_supply_register() call was not checked and even on error probe() function returned 0. If registering failed then during unbind the driver tried to unregister power supply which was not actually registered. This could lead to memory corruption because power_supply_unregister() unconditionally cleans up given power supply. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Fixes: da0a00ebc239 ("power: Add twl4030_madc battery driver.") Cc: <stable@vger.kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/twl4030_madc_battery.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/power/twl4030_madc_battery.c b/drivers/power/twl4030_madc_battery.c
index 7ef445a6cfa6..cf907609ec49 100644
--- a/drivers/power/twl4030_madc_battery.c
+++ b/drivers/power/twl4030_madc_battery.c
@@ -192,6 +192,7 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
{
struct twl4030_madc_battery *twl4030_madc_bat;
struct twl4030_madc_bat_platform_data *pdata = pdev->dev.platform_data;
+ int ret = 0;
twl4030_madc_bat = kzalloc(sizeof(*twl4030_madc_bat), GFP_KERNEL);
if (!twl4030_madc_bat)
@@ -216,9 +217,11 @@ static int twl4030_madc_battery_probe(struct platform_device *pdev)
twl4030_madc_bat->pdata = pdata;
platform_set_drvdata(pdev, twl4030_madc_bat);
- power_supply_register(&pdev->dev, &twl4030_madc_bat->psy);
+ ret = power_supply_register(&pdev->dev, &twl4030_madc_bat->psy);
+ if (ret < 0)
+ kfree(twl4030_madc_bat);
- return 0;
+ return ret;
}
static int twl4030_madc_battery_remove(struct platform_device *pdev)