From: Yuanjun Gong <ruc_gongyuanjun@163.com>
Date: Mon, 17 Jul 2023 14:46:21 +0000 (+0800)
Subject: drivers: net: fix return value check in emac_tso_csum()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=78a93c31003cc53aca5d67b1bbe2d5b9fc37cc4d;p=linux.git

drivers: net: fix return value check in emac_tso_csum()

in emac_tso_csum(), return an error code if an unexpected value
is returned by pskb_trim().

Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
index 0d80447d4d3b4..d5c688a8d7bec 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -1260,8 +1260,11 @@ static int emac_tso_csum(struct emac_adapter *adpt,
 		if (skb->protocol == htons(ETH_P_IP)) {
 			u32 pkt_len = ((unsigned char *)ip_hdr(skb) - skb->data)
 				       + ntohs(ip_hdr(skb)->tot_len);
-			if (skb->len > pkt_len)
-				pskb_trim(skb, pkt_len);
+			if (skb->len > pkt_len) {
+				ret = pskb_trim(skb, pkt_len);
+				if (unlikely(ret))
+					return ret;
+			}
 		}
 
 		hdr_len = skb_tcp_all_headers(skb);