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net: dsa: add error handling for pskb_trim_rcsum 

When pskb_trim_rcsum fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling pskb_trim_rcsum.

Signed-off-by: Zhouyang Jia <jiazhouyang09@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhouyang Jia 2018-06-11 13:26:35 +08:00 committed by David S. Miller
parent 0975764684
commit 349b71d6f4
1 changed files with 2 additions and 1 deletions
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3
net/dsa/tag_trailer.c
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@ -75,7 +75,8 @@ static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev,
if (!skb->dev)
return NULL;
pskb_trim_rcsum(skb, skb->len - 4);
if (pskb_trim_rcsum(skb, skb->len - 4))
return NULL;
return skb;
}