netdev - [PATCH] rxrpc: Fix memleak in rxkad_verify

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Message-Id: <20200826113120.24297-1-dinghao.liu@zju.edu.cn>
Date:   Wed, 26 Aug 2020 19:31:20 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     David Howells <dhowells@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-afs@...ts.infradead.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] rxrpc: Fix memleak in rxkad_verify_response

When kmalloc() on ticket fails, response should be freed
to prevent memleak.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
 net/rxrpc/rxkad.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index 52a24d4ef5d8..e08130e5746b 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -1137,7 +1137,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
 	ret = -ENOMEM;
 	ticket = kmalloc(ticket_len, GFP_NOFS);
 	if (!ticket)
-		goto temporary_error;
+		goto temporary_error_free_resp;
 
 	eproto = tracepoint_string("rxkad_tkt_short");
 	abort_code = RXKADPACKETSHORT;
@@ -1230,6 +1230,7 @@ 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