HID: wacom: fix memory leak on sysfs attribute creation failure

JIRA: https://issues.redhat.com/browse/RHEL-102058
Upstream Status: v6.16

commit 1a19ae4
Author: Qasim Ijaz <qasdev00@gmail.com>
Date:   Fri Jun 6 19:49:58 2025 +0100

    HID: wacom: fix memory leak on sysfs attribute creation failure

    When sysfs_create_files() fails during wacom_initialize_remotes() the
    fifo buffer is not freed leading to a memory leak.

    Fix this by calling kfifo_free() before returning.

    Fixes: 83e6b40 ("HID: wacom: EKR: have the wacom resources dynamically allocated")
    Reviewed-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: Benjamin Tissoires <benjamin.tissoires@redhat.com>

Author: bentiss

drivers/hid/wacom_sys.c

@@ -2056,6 +2056,7 @@ static int wacom_initialize_remotes(struct wacom *wacom)
 	if (error) {
 		hid_err(wacom->hdev,
 			"cannot create sysfs group err: %d\n", error);
+		kfifo_free(&remote->remote_fifo);
 		return error;
 	}