netdev - [PATCH v2 1/1] net: ipv4: fix return value check in esp_remove

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Message-Id: <20230725064031.4472-1-ruc_gongyuanjun@163.com>
Date: Tue, 25 Jul 2023 14:40:31 +0800
From: Yuanjun Gong <ruc_gongyuanjun@....com>
To: dsahern@...nel.org
Cc: herbert@...dor.apana.org.au,
	netdev@...r.kernel.org,
	ruc_gongyuanjun@....com,
	steffen.klassert@...unet.com
Subject: [PATCH v2 1/1] net: ipv4: fix return value check in esp_remove_trailer()

return an error number if an unexpected result is returned by
pskb_tirm() in esp_remove_trailer().

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@....com>
---
 net/ipv4/esp4.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index ba06ed42e428..b435e3fe4dc6 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -732,7 +732,9 @@ static inline int esp_remove_trailer(struct sk_buff *skb)
 		skb->csum = csum_block_sub(skb->csum, csumdiff,
 					   skb->len - trimlen);
 	}
-	pskb_trim(skb, skb->len - trimlen);
+	ret = pskb_trim(skb, skb->len - trimlen);
+	if (ret)
+		goto out;
 
 	ret = nexthdr[1];
 
-- 
2.17.1