linux-kernel - [PATCH AUTOSEL 5.4 04/14] ethernet: atheros: fix return value check in atl1c_tso

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Message-Id: <20230813161202.1086004-4-sashal@kernel.org>
Date:   Sun, 13 Aug 2023 12:11:52 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yuanjun Gong <ruc_gongyuanjun@....com>,
        Simon Horman <simon.horman@...igine.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, chris.snook@...il.com,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        pavan.chebbi@...adcom.com, trix@...hat.com, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 04/14] ethernet: atheros: fix return value check in atl1c_tso_csum()

From: Yuanjun Gong <ruc_gongyuanjun@....com>

[ Upstream commit 8d01da0a1db237c44c92859ce3612df7af8d3a53 ]

in atl1c_tso_csum, it should check the return value of pskb_trim(),
and return an error code if an unexpected value is returned
by pskb_trim().

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@....com>
Reviewed-by: Simon Horman <simon.horman@...igine.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 2b239ecea05f2..ff28dbf515747 100644
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -1989,8 +1989,11 @@ static int atl1c_tso_csum(struct atl1c_adapter *adapter,
 			real_len = (((unsigned char *)ip_hdr(skb) - skb->data)
 					+ ntohs(ip_hdr(skb)->tot_len));
 
-			if (real_len < skb->len)
-				pskb_trim(skb, real_len);
+			if (real_len < skb->len) {
+				err = pskb_trim(skb, real_len);
+				if (err)
+					return err;
+			}
 
 			hdr_len = (skb_transport_offset(skb) + tcp_hdrlen(skb));
 			if (unlikely(skb->len == hdr_len)) {
-- 
2.40.1