From: Taehee Yoo <ap420073@gmail.com>
Date: Tue, 2 Jul 2019 15:24:04 +0000 (+0900)
Subject: gtp: add missing gtp_encap_disable_sock() in gtp_encap_enable()
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=e30155fd23c9c141cbe7d99b786e10a83a328837;p=openwrt%2Fstaging%2Fblogic.git

gtp: add missing gtp_encap_disable_sock() in gtp_encap_enable()

If an invalid role is sent from user space, gtp_encap_enable() will fail.
Then, it should call gtp_encap_disable_sock() but current code doesn't.
It makes memory leak.

Fixes: 91ed81f9abc7 ("gtp: support SGSN-side tunnels")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index b3ccac54e204..ecfe26215935 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -857,8 +857,13 @@ static int gtp_encap_enable(struct gtp_dev *gtp, struct nlattr *data[])
 
 	if (data[IFLA_GTP_ROLE]) {
 		role = nla_get_u32(data[IFLA_GTP_ROLE]);
-		if (role > GTP_ROLE_SGSN)
+		if (role > GTP_ROLE_SGSN) {
+			if (sk0)
+				gtp_encap_disable_sock(sk0);
+			if (sk1u)
+				gtp_encap_disable_sock(sk1u);
 			return -EINVAL;
+		}
 	}
 
 	gtp->sk0 = sk0;