5.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
commit e0b65f9b81fef180cf5f103adecbe5505c961153 upstream.
Alex reported that running ssh over IPv6 does not work with
Thunderbolt/USB4 networking driver. The reason for that is that driver
should call skb_is_gso() before calling skb_is_gso_v6(), and it should
not return false after calculates the checksum successfully. This probably
was a copy paste error from the original driver where it was done properly.
Reported-by: Alex Balcanquall <alex@xxxxxxxxxxx>
Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/thunderbolt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/net/thunderbolt.c
+++ b/drivers/net/thunderbolt.c
@@ -958,12 +958,11 @@ static bool tbnet_xmit_csum_and_map(stru
*tucso = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
ip_hdr(skb)->daddr, 0,
ip_hdr(skb)->protocol, 0);
- } else if (skb_is_gso_v6(skb)) {
+ } else if (skb_is_gso(skb) && skb_is_gso_v6(skb)) {
tucso = dest + ((void *)&(tcp_hdr(skb)->check) - data);
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr, 0,
IPPROTO_TCP, 0);
- return false;
} else if (protocol == htons(ETH_P_IPV6)) {
tucso = dest + skb_checksum_start_offset(skb) + skb->csum_offset;
*tucso = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
