If tcp_v4_inbound_md5_hash() returns an error, we must release
the refcount on the request socket, not on the listener.
The bug was added for IPv4 only.
Fixes: 079096f103fac ("tcp/dccp: install syn_recv requests into ehash table")
Signed-off-by: Eric Dumazet <eduma...@google.com>
---
net/ipv4/tcp_ipv4.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 7f6ff037adaf..c84477949d3a 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1600,8 +1600,10 @@ process:
struct sock *nsk = NULL;
sk = req->rsk_listener;
- if (tcp_v4_inbound_md5_hash(sk, skb))
- goto discard_and_relse;
+ if (unlikely(tcp_v4_inbound_md5_hash(sk, skb))) {
+ reqsk_put(req);
+ goto discard_it;
+ }
if (likely(sk->sk_state == TCP_LISTEN)) {
nsk = tcp_check_req(sk, skb, req, false);
} else {
--
2.7.0.rc3.207.g0ac5344
