4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xin Long <lucien.xin@xxxxxxxxx>
[ Upstream commit 27af86bb038d9c8b8066cd17854ddaf2ea92bce1 ]
The pr_err in sctp_hash_transport was supposed to report a sctp bug
for using rhashtable/rhlist.
The err '-EEXIST' introduced in Commit cd2b70875058 ("sctp: check
duplicate node before inserting a new transport") doesn't belong
to that case.
So just return -EEXIST back without pr_err any kmsg.
Fixes: cd2b70875058 ("sctp: check duplicate node before inserting a new transport")
Reported-by: Wei Chen <weichen@xxxxxxxxxx>
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/sctp/input.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -897,15 +897,12 @@ int sctp_hash_transport(struct sctp_tran
rhl_for_each_entry_rcu(transport, tmp, list, node)
if (transport->asoc->ep == t->asoc->ep) {
rcu_read_unlock();
- err = -EEXIST;
- goto out;
+ return -EEXIST;
}
rcu_read_unlock();
err = rhltable_insert_key(&sctp_transport_hashtable, &arg,
&t->node, sctp_hash_params);
-
-out:
if (err)
pr_err_once("insert transport fail, errno %d\n", err);