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net:ipv6: check return value of pskb_trim()

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goto tx_err if an unexpected result is returned by pskb_tirm()
in ip6erspan_tunnel_xmit().

Fixes: 5a963eb61b ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Yuanjun Gong <ruc_gongyuanjun@163.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuanjun Gong 2023-07-17 22:45:19 +08:00 committed by David S. Miller
parent daa751444f
commit 4258faa130
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/ip6_gre.c
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@ -955,7 +955,8 @@ static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
goto tx_err;
if (skb->len > dev->mtu + dev->hard_header_len) {
pskb_trim(skb, dev->mtu + dev->hard_header_len);
if (pskb_trim(skb, dev->mtu + dev->hard_header_len))
goto tx_err;
truncate = true;
}