ethernet: atheros: fix return value check in atl1c_tso_csum()

[ 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@163.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
index 3615c2a06fdadf425e45466b58159d3136c88b2d..6f5c7c1401ce00770999421569401d5f27e5e800 100644 (file)
--- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
+++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c
@@ -2001,8 +2001,11 @@ 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)) {