j1939_can_recv() can be called in parallel with socket release. In this
case sk_release and sk_destruct can be done earlier than
j1939_can_recv() is processed.
Reported-by: syzbot+ca172a0ac477ac90f045@xxxxxxxxxxxxxxxxxxxxxxxxx
Reported-by: syzbot+07ca5bce8530070a5650@xxxxxxxxxxxxxxxxxxxxxxxxx
Reported-by: syzbot+a47537d3964ef6c874e1@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
net/can/j1939/main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/can/j1939/main.c b/net/can/j1939/main.c
index 8dc935dc2e54..2afcf27c72c8 100644
--- a/net/can/j1939/main.c
+++ b/net/can/j1939/main.c
@@ -51,6 +51,7 @@ static void j1939_can_recv(struct sk_buff *iskb, void *data)
if (!skb)
return;
+ j1939_priv_get(priv);
can_skb_set_owner(skb, iskb->sk);
/* get a pointer to the header of the skb
@@ -104,6 +105,7 @@ static void j1939_can_recv(struct sk_buff *iskb, void *data)
j1939_simple_recv(priv, skb);
j1939_sk_recv(priv, skb);
done:
+ j1939_priv_put(priv);
kfree_skb(skb);
}
--
2.24.0.rc1
