From b43e3a82bc432c1caaed8950e7662c143470c54c Mon Sep 17 00:00:00 2001 From: Oleksij Rempel Date: Fri, 7 Aug 2020 12:51:56 +0200 Subject: can: j1939: transport: j1939_simple_recv(): ignore local J1939 messages send not by J1939 stack In current J1939 stack implementation, we process all locally send messages as own messages. Even if it was send by CAN_RAW socket. To reproduce it use following commands: testj1939 -P -r can0:0x80 & cansend can0 18238040#0123 This step will trigger false positive not critical warning: j1939_simple_recv: Received already invalidated message With this patch we add additional check to make sure, related skb is own echo message. Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Signed-off-by: Oleksij Rempel Link: https://lore.kernel.org/r/20200807105200.26441-2-o.rempel@pengutronix.de Signed-off-by: Marc Kleine-Budde --- net/can/j1939/transport.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'net/can/j1939/transport.c') diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c index 9f99af5b0b11..b135c5e2a86e 100644 --- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -2017,6 +2017,10 @@ void j1939_simple_recv(struct j1939_priv *priv, struct sk_buff *skb) if (!skb->sk) return; + if (skb->sk->sk_family != AF_CAN || + skb->sk->sk_protocol != CAN_J1939) + return; + j1939_session_list_lock(priv); session = j1939_session_get_simple(priv, skb); j1939_session_list_unlock(priv); -- cgit