atheros: fix return value check in atl1_tso()

[ Upstream commit ed96824b71ed67664390890441b229423a25317f ]

in atl1_tso(), it should check the return value of pskb_trim(),
and return an error code if an unexpected value is returned
by pskb_trim().

Fixes: 401c0aabec4b ("atl1: simplify tx packet descriptor")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Link: https://lore.kernel.org/r/20230722142511.12448-1-ruc_gongyuanjun@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/atheros/atlx/atl1.c b/drivers/net/ethernet/atheros/atlx/atl1.c
index c8444bcdf52707a89bb72c09a3e88fcf08bd2ae7..02aa6fd8ebc2d47f5752eec49199b6cc41d6c1f1 100644 (file)
--- a/drivers/net/ethernet/atheros/atlx/atl1.c
+++ b/drivers/net/ethernet/atheros/atlx/atl1.c
@@ -2113,8 +2113,11 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
 
                        real_len = (((unsigned char *)iph - skb->data) +
                                ntohs(iph->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_tcp_all_headers(skb);
                        if (skb->len == hdr_len) {
                                iph->check = 0;