[PATCH] Fix possible NULL Pointer Dereference in 'extcon_rtk_type_c_probe'

[Gax-c]

A 'devm_kzalloc' in 'extcon_rtk_type_c_probe' could possibly return null pointer.
Add a null check for the returned pointer.

Fixes: 8a590d7371f0 ("extcon: add Realtek DHC RTD SoC Type-C driver")
Signed-off-by: Zichen Xie <zichenxie0106@xxxxxxxxx>
Reported-by: Zichen Xie <zichenxie0106@xxxxxxxxx>
Reported-by: Zijie Zhao <zzjas98@xxxxxxxxx>
Reported-by: Chenyuan Yang <chenyuan0y@xxxxxxxxx>
---
 drivers/extcon/extcon-rtk-type-c.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/extcon/extcon-rtk-type-c.c b/drivers/extcon/extcon-rtk-type-c.c
index a592bab77538..9a0824fc7cbe 100644
--- a/drivers/extcon/extcon-rtk-type-c.c
+++ b/drivers/extcon/extcon-rtk-type-c.c
@@ -1371,6 +1371,12 @@ static int extcon_rtk_type_c_probe(struct platform_device *pdev)
 
 	type_c->type_c_cfg = devm_kzalloc(dev, sizeof(*type_c_cfg), GFP_KERNEL);
 
+	if (!type_c->type_c_cfg) {
+		dev_err(dev, "Failed to allocate memory for type_c_cfg!\n");
+		ret = -ENOMEM;
+		goto err;
+	}
+
 	memcpy(type_c->type_c_cfg, type_c_cfg, sizeof(*type_c_cfg));
 
 	if (setup_type_c_parameter(type_c)) {
-- 
2.25.1