From 3e99fae25da44f1d38eed97aac3e2f477e8856f1 Mon Sep 17 00:00:00 2001
From: Kangjie Lu <kjlu@umn.edu>
Date: Sat, 1 Jun 2019 17:19:26 +0800
Subject: [PATCH] slimbus: fix a potential NULL pointer dereference in
 of_qcom_slim_ngd_register

[ 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@umn.edu>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 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 14a9d18306cb..f63d1b8a0933 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;
-- 
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