linux-kernel - [PATCH] HID: uclogic: Add NULL check in uclogic_input

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Message-Id: <20250331113732.10722-1-bsdhenrymartin@gmail.com>
Date: Mon, 31 Mar 2025 19:37:32 +0800
From: Henry Martin <bsdhenrymartin@...il.com>
To: jikos@...nel.org,
	bentiss@...nel.org
Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Henry Martin <bsdhenrymartin@...il.com>
Subject: [PATCH] HID: uclogic: Add NULL check in uclogic_input_configured

devm_kasprintf() can return a NULL pointer on failure, but this
returned value in uclogic_input_configured is not checked.

Add NULL check in uclogic_input_configured, to handle kernel NULL
pointer dereference error.

Fixes: dd613a4e45f8d("HID: uclogic: Correct devm device reference for hidinput input_dev name")
Signed-off-by: Henry Martin <bsdhenrymartin@...il.com>
---
 drivers/hid/hid-uclogic-core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c
index d8008933c052..f8708a1ec7cc 100644
--- a/drivers/hid/hid-uclogic-core.c
+++ b/drivers/hid/hid-uclogic-core.c
@@ -144,9 +144,12 @@ static int uclogic_input_configured(struct hid_device *hdev,
 		}
 	}
 
-	if (suffix)
+	if (suffix) {
 		hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
 						 "%s %s", hdev->name, suffix);
+		if (!hi->input->name)
+			return -ENOMEM;
+	}
 
 	return 0;
 }
-- 
2.34.1