netdev - [PATCH v2 1/1] tipc: check return value of pskb

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Message-Id: <20230725064810.5820-1-ruc_gongyuanjun@163.com>
Date: Tue, 25 Jul 2023 14:48:10 +0800
From: Yuanjun Gong <ruc_gongyuanjun@....com>
To: kuniyu@...zon.com
Cc: jmaloy@...hat.com,
	netdev@...r.kernel.org,
	ruc_gongyuanjun@....com,
	ying.xue@...driver.com
Subject: [PATCH v2 1/1] tipc: check return value of pskb_trim()

goto free_skb if an unexpected result is returned by pskb_tirm()
in tipc_crypto_rcv_complete().

Fixes: fc1b6d6de220 ("tipc: introduce TIPC encryption & authentication")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@....com>
---
 net/tipc/crypto.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index 577fa5af33ec..302fd749c424 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -1960,7 +1960,8 @@ static void tipc_crypto_rcv_complete(struct net *net, struct tipc_aead *aead,
 
 	skb_reset_network_header(*skb);
 	skb_pull(*skb, tipc_ehdr_size(ehdr));
-	pskb_trim(*skb, (*skb)->len - aead->authsize);
+	if (pskb_trim(*skb, (*skb)->len - aead->authsize))
+		goto free_skb;
 
 	/* Validate TIPCv2 message */
 	if (unlikely(!tipc_msg_validate(skb))) {
-- 
2.17.1