netdev - [PATCH v3] rxrpc: fix a memory leak in rxkad_verify

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Date:   Fri, 22 May 2020 13:45:18 -0500
From:   wu000273@....edu
To:     dhowells@...hat.com
Cc:     Markus.Elfring@....de, davem@...emloft.net, kuba@...nel.org,
        linux-afs@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kjlu@....edu, wu000273@....edu
Subject: [PATCH v3] rxrpc: fix a memory leak in rxkad_verify_response().

From: Qiushi Wu <wu000273@....edu>

A ticket was not released after a call of the function
“rxkad_decrypt_ticket” failed. Thus replace the jump target
“temporary_error_free_resp” by “temporary_error_free_ticket”.

Fixes: 8c2f826dc3631 ("rxrpc: Don't put crypto buffers on the stack")
Signed-off-by: Qiushi Wu <wu000273@....edu>
---
 net/rxrpc/rxkad.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index 098f1f9ec53b..52a24d4ef5d8 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -1148,7 +1148,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
 	ret = rxkad_decrypt_ticket(conn, skb, ticket, ticket_len, &session_key,
 				   &expiry, _abort_code);
 	if (ret < 0)
-		goto temporary_error_free_resp;
+		goto temporary_error_free_ticket;
 
 	/* use the session key from inside the ticket to decrypt the
 	 * response */
@@ -1230,7 +1230,6 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
 
 temporary_error_free_ticket:
 	kfree(ticket);
-temporary_error_free_resp:
 	kfree(response);
 temporary_error:
 	/* Ignore the response packet if we got a temporary error such as
-- 
2.17.1