From: Qasim Ijaz <qasdev00@gmail.com>
Date: Fri, 6 Jun 2025 18:49:59 +0000 (+0100)
Subject: HID: wacom: fix kobject reference count leak
X-Git-Tag: v5.10.240~148
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8488c952e776b30a547c1abeb5258d16a4b5ad09;p=thirdparty%2Fkernel%2Fstable.git

HID: wacom: fix kobject reference count leak

commit 85a720f4337f0ddf1603c8b75a8f1ffbbe022ef9 upstream.

When sysfs_create_files() fails in wacom_initialize_remotes() the error
is returned and the cleanup action will not have been registered yet.

As a result the kobject???s refcount is never dropped, so the
kobject can never be freed leading to a reference leak.

Fix this by calling kobject_put() before returning.

Fixes: 83e6b40e2de6 ("HID: wacom: EKR: have the wacom resources dynamically allocated")
Acked-by: Ping Cheng <ping.cheng@wacom.com>
Cc: stable@vger.kernel.org
Signed-off-by: Qasim Ijaz <qasdev00@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index af0bbd5ece97c..abbfb53bb7dc9 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2031,6 +2031,7 @@ static int wacom_initialize_remotes(struct wacom *wacom)
 		hid_err(wacom->hdev,
 			"cannot create sysfs group err: %d\n", error);
 		kfifo_free(&remote->remote_fifo);
+		kobject_put(remote->remote_dir);
 		return error;
 	}