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authorRoger Quadros <rogerq@ti.com>2016-12-08 10:45:31 +0200
committerChanwoo Choi <cw00.choi@samsung.com>2017-01-09 10:04:09 +0900
commit9fe172b9be532acc23e35ba693700383ab775e66 (patch)
tree1379a62ed222e59d512a3bc7597dba3034eebdd1 /drivers
parentaf57fa4de24654aa4b2ee648dcd14a3e31bce3a6 (diff)
downloadlinux-9fe172b9be532acc23e35ba693700383ab775e66.tar.bz2
extcon: palmas: Check the parent instance to prevent the NULL
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@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/extcon/extcon-palmas.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
index 634ba70782de..a128fd2eb187 100644
--- a/drivers/extcon/extcon-palmas.c
+++ b/drivers/extcon/extcon-palmas.c
@@ -190,6 +190,11 @@ static int palmas_usb_probe(struct platform_device *pdev)
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;