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| author | Felix Fietkau <nbd@nbd.name> | 2025-03-11 22:25:30 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-28 22:04:53 +0100 |
| commit | da5d33388224537b4dbeb1ecf1268d2fa28f3991 (patch) | |
| tree | ac84eee6d9e4a6333c68d7b996dd6fbea8f36613 /net | |
| parent | 942557abed7f38b77a47d77b92d448802eefe185 (diff) | |
| download | linux-da5d33388224537b4dbeb1ecf1268d2fa28f3991.tar.gz linux-da5d33388224537b4dbeb1ecf1268d2fa28f3991.tar.bz2 linux-da5d33388224537b4dbeb1ecf1268d2fa28f3991.zip | |
net: ipv6: fix TCP GSO segmentation with NAT
[ Upstream commit daa624d3c2ddffdcbad140a9625a4064371db44f ]
When updating the source/destination address, the TCP/UDP checksum needs to
be updated as well.
Fixes: bee88cd5bd83 ("net: add support for segmenting TCP fraglist GSO packets")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://patch.msgid.link/20250311212530.91519-1-nbd@nbd.name
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/tcpv6_offload.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/net/ipv6/tcpv6_offload.c b/net/ipv6/tcpv6_offload.c index a45bf17cb2a1..ae2da28f9dfb 100644 --- a/net/ipv6/tcpv6_offload.c +++ b/net/ipv6/tcpv6_offload.c @@ -94,14 +94,23 @@ INDIRECT_CALLABLE_SCOPE int tcp6_gro_complete(struct sk_buff *skb, int thoff) } static void __tcpv6_gso_segment_csum(struct sk_buff *seg, + struct in6_addr *oldip, + const struct in6_addr *newip, __be16 *oldport, __be16 newport) { - struct tcphdr *th; + struct tcphdr *th = tcp_hdr(seg); + + if (!ipv6_addr_equal(oldip, newip)) { + inet_proto_csum_replace16(&th->check, seg, + oldip->s6_addr32, + newip->s6_addr32, + true); + *oldip = *newip; + } if (*oldport == newport) return; - th = tcp_hdr(seg); inet_proto_csum_replace2(&th->check, seg, *oldport, newport, false); *oldport = newport; } @@ -129,10 +138,10 @@ static struct sk_buff *__tcpv6_gso_segment_list_csum(struct sk_buff *segs) th2 = tcp_hdr(seg); iph2 = ipv6_hdr(seg); - iph2->saddr = iph->saddr; - iph2->daddr = iph->daddr; - __tcpv6_gso_segment_csum(seg, &th2->source, th->source); - __tcpv6_gso_segment_csum(seg, &th2->dest, th->dest); + __tcpv6_gso_segment_csum(seg, &iph2->saddr, &iph->saddr, + &th2->source, th->source); + __tcpv6_gso_segment_csum(seg, &iph2->daddr, &iph->daddr, + &th2->dest, th->dest); } return segs; |