From: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>
[ Upstream commit 6631463b6e6673916d2481f692938f393148aa82 ]
Now these upper layer protocol handlers can be called from llc_rcv()
as sap->rcv_func(), which is registered by llc_sap_open().
* function which is passed to register_8022_client()
-> no in-kernel user calls register_8022_client().
* snap_rcv()
`- proto->rcvfunc() : registered by register_snap_client()
-> aarp_rcv() and atalk_rcv() drop packets from non-root netns
* stp_pdu_rcv()
`- garp_protos[]->rcv() : registered by stp_proto_register()
-> garp_pdu_rcv() and br_stp_rcv() are netns-aware
So, we can safely remove the netns restriction in llc_rcv().
Fixes: e730c15519d0 ("[NET]: Make packet reception network namespace safe")
Signed-off-by: Kuniyuki Iwashima <kuniyu@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/llc/llc_input.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/net/llc/llc_input.c b/net/llc/llc_input.c
index c309b72a58779..7cac441862e21 100644
--- a/net/llc/llc_input.c
+++ b/net/llc/llc_input.c
@@ -163,9 +163,6 @@ int llc_rcv(struct sk_buff *skb, struct net_device *dev,
void (*sta_handler)(struct sk_buff *skb);
void (*sap_handler)(struct llc_sap *sap, struct sk_buff *skb);
- if (!net_eq(dev_net(dev), &init_net))
- goto drop;
-
/*
* When the interface is in promisc. mode, drop all the crap that it
* receives, do not try to analyse it.
--
2.39.2
