Eric Dumazet a écrit :

Seems drivers/net/pppol2tp.c is a suspect...

It uses register_pernet_gen_device() from pppol2tp_init()
but doesnt call unregister_pernet_gen_device()

OK patch seems really easy...

This bug was added in commit 4e9fb8016a351b5b9da7fea32bcfdbc9d836e421
net: pppol2tp - introduce net-namespace functionality

So this is a stable candidate I guess ?

Thank you


[PATCH] pppol2tp: calls unregister_pernet_gen_device() at unload time

Failure to call unregister_pernet_gen_device() can exhaust memory
if module is loaded/unloaded many times.

Signed-off-by: Eric Dumazet <redacted>
---

diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c
index e7935d0..e0f9219 100644
--- a/drivers/net/pppol2tp.c
+++ b/drivers/net/pppol2tp.c

@@ -2680,6 +2680,7 @@ out_unregister_pppol2tp_proto:
 static void __exit pppol2tp_exit(void)
 {
 	unregister_pppox_proto(PX_PROTO_OL2TP);
+	unregister_pernet_gen_device(pppol2tp_net_id, &pppol2tp_net_ops);
 	proto_unregister(&pppol2tp_sk_proto);
 }