ipv6: Partial checksum only UDP packets
ip6_append_data is used by other protocols and some of them can't
be partially checksummed. Only partially checksum UDP protocol.
Fixes: 32dce968dd
(ipv6: Allow for partial checksums on non-ufo packets)
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1273,7 +1273,7 @@ emsgsize:
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/* If this is the first and only packet and device
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* supports checksum offloading, let's use it.
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*/
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if (!skb &&
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if (!skb && sk->sk_protocol == IPPROTO_UDP &&
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length + fragheaderlen < mtu &&
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rt->dst.dev->features & NETIF_F_V6_CSUM &&
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!exthdrlen)
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