[PATCH AUTOSEL 4.19 055/244] slimbus: fix a potential NULL pointer dereference in of_qcom_slim_ngd_register

[Sasha Levin]

From: Kangjie Lu <kjlu@xxxxxxx>

[ Upstream commit 06d5d6b7f9948a89543e1160ef852d57892c750d ]

In case platform_device_alloc fails, the fix returns an error
code to avoid the NULL pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@xxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/slimbus/qcom-ngd-ctrl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/slimbus/qcom-ngd-ctrl.c b/drivers/slimbus/qcom-ngd-ctrl.c
index 14a9d18306cbf..f63d1b8a09335 100644
--- a/drivers/slimbus/qcom-ngd-ctrl.c
+++ b/drivers/slimbus/qcom-ngd-ctrl.c
@@ -1331,6 +1331,10 @@ static int of_qcom_slim_ngd_register(struct device *parent,
 			return -ENOMEM;
 
 		ngd->pdev = platform_device_alloc(QCOM_SLIM_NGD_DRV_NAME, id);
+		if (!ngd->pdev) {
+			kfree(ngd);
+			return -ENOMEM;
+		}
 		ngd->id = id;
 		ngd->pdev->dev.parent = parent;
 		ngd->pdev->driver_override = QCOM_SLIM_NGD_DRV_NAME;
-- 
2.20.1