linux-kernel - [PATCH net] tipc: fix a bit overflow in tipc_crypto_key

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Date:   Fri, 11 Feb 2022 12:55:10 +0800
From:   Hangyu Hua <hbh25y@...il.com>
To:     jmaloy@...hat.com, ying.xue@...driver.com, davem@...emloft.net,
        kuba@...nel.org
Cc:     netdev@...r.kernel.org, tipc-discussion@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Hangyu Hua <hbh25y@...il.com>
Subject: [PATCH net] tipc: fix a bit overflow in tipc_crypto_key_rcv()

msg_data_sz return a 32bit value, but size is 16bit. This may lead to a
bit overflow.

Signed-off-by: Hangyu Hua <hbh25y@...il.com>
---
 net/tipc/crypto.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index d293614d5fc6..b5074957e881 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -2287,7 +2287,7 @@ static bool tipc_crypto_key_rcv(struct tipc_crypto *rx, struct tipc_msg *hdr)
 	struct tipc_crypto *tx = tipc_net(rx->net)->crypto_tx;
 	struct tipc_aead_key *skey = NULL;
 	u16 key_gen = msg_key_gen(hdr);
-	u16 size = msg_data_sz(hdr);
+	u32 size = msg_data_sz(hdr);
 	u8 *data = msg_data(hdr);
 	unsigned int keylen;
 
-- 
2.25.1