This is a note to let you know that I've just added the patch titled extcon: palmas: Check the parent instance to prevent the NULL to the 3.18-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: extcon-palmas-check-the-parent-instance-to-prevent-the-null.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Sun Nov 19 12:16:40 CET 2017 From: Roger Quadros <rogerq@xxxxxx> Date: Thu, 8 Dec 2016 10:45:31 +0200 Subject: extcon: palmas: Check the parent instance to prevent the NULL From: Roger Quadros <rogerq@xxxxxx> [ Upstream commit 9fe172b9be532acc23e35ba693700383ab775e66 ] extcon-palmas must be child of palmas and expects parent's drvdata to be valid. Check for non NULL parent drvdata and fail if it is NULL. Not doing so will result in a NULL pointer dereference later in the probe() parent drvdata is NULL (e.g. misplaced extcon-palmas node in device tree). Signed-off-by: Roger Quadros <rogerq@xxxxxx> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/extcon/extcon-palmas.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/extcon/extcon-palmas.c +++ b/drivers/extcon/extcon-palmas.c @@ -150,6 +150,11 @@ static int palmas_usb_probe(struct platf struct palmas_usb *palmas_usb; int status; + if (!palmas) { + dev_err(&pdev->dev, "failed to get valid parent\n"); + return -EINVAL; + } + palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL); if (!palmas_usb) return -ENOMEM; Patches currently in stable-queue which might be from rogerq@xxxxxx are queue-3.18/extcon-palmas-check-the-parent-instance-to-prevent-the-null.patch