From db1a804cca6fe0cea9dea888d50dda134713c340 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 18 Sep 2019 11:11:56 +0100
Subject: [PATCH] can: j1939: fix resource leak of skb on error return paths
Currently the error return paths do not free skb and this results in a
memory leak. Fix this by freeing them before the return.
Addresses-Coverity: ("Resource leak")
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
net/can/j1939/socket.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index 37c1040bcb9c1..5c6eabcb5df1e 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -909,8 +909,10 @@ void j1939_sk_errqueue(struct j1939_session *session,
memset(serr, 0, sizeof(*serr));
switch (type) {
case J1939_ERRQUEUE_ACK:
- if (!(sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK))
+ if (!(sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK)) {
+ kfree_skb(skb);
return;
+ }
serr->ee.ee_errno = ENOMSG;
serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
@@ -918,8 +920,10 @@ void j1939_sk_errqueue(struct j1939_session *session,
state = "ACK";
break;
case J1939_ERRQUEUE_SCHED:
- if (!(sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED))
+ if (!(sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED)) {
+ kfree_skb(skb);
return;
+ }
serr->ee.ee_errno = ENOMSG;
serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
--
2.30.2