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ip6erspan: improve error handling for erspan version number.
When users fill in incorrect erspan version number through the struct erspan_metadata uapi, current code skips pushing the erspan header but continue pushing the gre header, which is incorrect. The patch fixes it by returning error. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -945,6 +945,8 @@ static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
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md->u.md2.dir,
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get_hwid(&md->u.md2),
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truncate, false);
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} else {
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goto tx_err;
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}
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} else {
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switch (skb->protocol) {
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