This is a note to let you know that I've just added the patch titled power_supply: twl4030_madc: Check return value of power_supply_register to the 4.0-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-twl4030_madc-check-return-value-of-power_supply_register.patch and it can be found in the queue-4.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 68c3ed6fa7e0d69529ced772d650ab128916a81d Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> Date: Fri, 20 Feb 2015 14:32:22 +0100 Subject: power_supply: twl4030_madc: Check return value of power_supply_register From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> commit 68c3ed6fa7e0d69529ced772d650ab128916a81d upstream. 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@xxxxxxxxxxx> Fixes: da0a00ebc239 ("power: Add twl4030_madc battery driver.") Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/power/twl4030_madc_battery.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/power/twl4030_madc_battery.c +++ b/drivers/power/twl4030_madc_battery.c @@ -192,6 +192,7 @@ static int twl4030_madc_battery_probe(st { 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(st 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) Patches currently in stable-queue which might be from k.kozlowski@xxxxxxxxxxx are queue-4.0/compal-laptop-fix-leaking-hwmon-device.patch queue-4.0/compal-laptop-check-return-value-of-power_supply_register.patch queue-4.0/power_supply-twl4030_madc-check-return-value-of-power_supply_register.patch queue-4.0/power_supply-ipaq_micro_battery-fix-leaking-workqueue.patch queue-4.0/power_supply-lp8788-charger-fix-leaked-power-supply-on-probe-fail.patch queue-4.0/power_supply-ipaq_micro_battery-check-return-values-in-probe.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html