Received-SPF: pass (google.com: domain of linux-kernel+bounces-168195-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Date: Fri, 3 May 2024 23:36:37 +0300
From: Dan Carpenter <dan.carpenter@linaro.org>
To: Lars Kellogg-Stedman <lars@oddbit.com>
Cc: Duoming Zhou <duoming@zju.edu.cn>, linux-hams@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	pabeni@redhat.com, kuba@kernel.org, edumazet@google.com,
	davem@davemloft.net, jreuter@yaina.de
Subject: Re: [PATCH net] ax25: Fix refcount leak issues of ax25_dev
Message-ID: <78ae8aa0-eac5-4ade-8e85-0479a22e98a3@moroto.mountain>
References: <20240501060218.32898-1-duoming@zju.edu.cn>
 <my4l7ljo35dnwxl33maqhyvw7666dmuwtduwtyhnzdlb6bbf5m@5sbp4tvg246f>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <my4l7ljo35dnwxl33maqhyvw7666dmuwtduwtyhnzdlb6bbf5m@5sbp4tvg246f>

Could you test this diff?

regards,
dan carpenter

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 558e158c98d0..a7f96a4ceff4 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1129,8 +1129,10 @@ static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 	/*
 	 * User already set interface with SO_BINDTODEVICE
 	 */
-	if (ax25->ax25_dev != NULL)
+	if (ax25->ax25_dev != NULL) {
+		ax25_dev_hold(ax25->ax25_dev);
 		goto done;
+	}
 
 	if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
 		if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&