linux-kernel - [PATCH] mfd: ene-kb3930: Fix potential NULL pointer dereference

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Message-Id: <20250120190720.322926-1-chenyuan0y@gmail.com>
Date: Mon, 20 Jan 2025 13:07:20 -0600
From: Chenyuan Yang <chenyuan0y@...il.com>
To: lee@...nel.org,
	lkundrak@...sk
Cc: linux-kernel@...r.kernel.org,
	zijie98@...il.com,
	Chenyuan Yang <chenyuan0y@...il.com>
Subject: [PATCH] mfd: ene-kb3930: Fix potential NULL pointer dereference

The off_gpios could be NULL. Add missing check in the kb3930_probe().
This is similar to the issue fixed in commit
b1ba8bcb2d1ffce11b308ce166c9cc28d989e3b9 ("backlight: hx8357:Fix potential NULL pointer dereference").

Fixes: ede6b2d1dfc0 ("mfd: ene-kb3930: Add driver for ENE KB3930 Embedded Controller")
Signed-off-by: Chenyuan Yang <chenyuan0y@...il.com>
---
 drivers/mfd/ene-kb3930.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mfd/ene-kb3930.c b/drivers/mfd/ene-kb3930.c
index fa0ad2f14a39..60824d847bf0 100644
--- a/drivers/mfd/ene-kb3930.c
+++ b/drivers/mfd/ene-kb3930.c
@@ -162,6 +162,8 @@ static int kb3930_probe(struct i2c_client *client)
 			devm_gpiod_get_array_optional(dev, "off", GPIOD_IN);
 		if (IS_ERR(ddata->off_gpios))
 			return PTR_ERR(ddata->off_gpios);
+		if (!ddata->off_gpios)
+			return -ENOMEM;
 		if (ddata->off_gpios->ndescs < 2) {
 			dev_err(dev, "invalid off-gpios property\n");
 			return -EINVAL;
-- 
2.34.1