Fix rxgk_verify_response() to clean up the rxgk context it creates.

Fixes: 9d1d2b59341f ("rxrpc: rxgk: Implement the yfs-rxgk security class (GSSAPI)")
Closes: https://sashiko.dev/#/patchset/20260401105614.1696001-10-dhowells@redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Jeffrey Altman <jaltman@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: "David S. Miller" <davem@davemloft.net>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: netdev@vger.kernel.org
cc: stable@kernel.org
---
 net/rxrpc/rxgk.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/rxrpc/rxgk.c b/net/rxrpc/rxgk.c
index 064c1531fc99..c67e3c2ca871 100644
--- a/net/rxrpc/rxgk.c
+++ b/net/rxrpc/rxgk.c
@@ -1270,16 +1270,18 @@ static int rxgk_verify_response(struct rxrpc_connection *conn,
 	if (ret < 0) {
 		rxrpc_abort_conn(conn, skb, RXGK_SEALEDINCON, ret,
 				 rxgk_abort_resp_auth_dec);
-		goto out;
+		goto out_gk;
 	}
 
 	ret = rxgk_verify_authenticator(conn, krb5, skb, auth_offset, auth_len);
 	if (ret < 0)
-		goto out;
+		goto out_gk;
 
 	conn->key = key;
 	key = NULL;
 	ret = 0;
+out_gk:
+	rxgk_put(gk);
 out:
 	key_put(key);
 	_leave(" = %d", ret);