From: Yi Li yili@winhong.com
mainline inclusion from mainline-v5.9-rc4 commit a156998fc92d3859c8e820f1583f6d0541d643c3 category: bugfix bugzilla: NA CVE: NA DTS: DTS2021090315802
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when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL and it is udp packet, which has a dest port as the IANA assigned. the hardware is expected to do the checksum offload, but the hardware will not do the checksum offload when udp dest port is 6081.
This patch fixes it by doing the checksum in software.
Reported-by: Li Bing libing@winhong.com Signed-off-by: Yi Li yili@winhong.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Yonglong Liu liuyonglong@huawei.com --- drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c index a2981e4573f0..4ab6cd0da201 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c @@ -20,6 +20,7 @@ #include <net/pkt_cls.h> #include <net/tcp.h> #include <net/vxlan.h> +#include <net/geneve.h>
#include "kcompat.h" #include "hnae3.h" @@ -774,16 +775,25 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto, * and it is udp packet, which has a dest port as the IANA assigned. * the hardware is expected to do the checksum offload, but the * hardware will not do the checksum offload when udp dest port is - * 4789. + * 4789 or 6081. */ static bool hns3_tunnel_csum_bug(struct sk_buff *skb) { -#define IANA_VXLAN_PORT 4789 +#ifndef IANA_VXLAN_UDP_PORT +#define IANA_VXLAN_UDP_PORT 4789 +#endif + +#ifndef GENEVE_UDP_PORT +#define GENEVE_UDP_PORT 6081 +#endif + union l4_hdr_info l4;
l4.hdr = skb_transport_header(skb);
- if (!(!skb->encapsulation && l4.udp->dest == htons(IANA_VXLAN_PORT))) + if (!(!skb->encapsulation && + (l4.udp->dest == htons(IANA_VXLAN_UDP_PORT) || + l4.udp->dest == htons(GENEVE_UDP_PORT)))) return false;
skb_checksum_help(skb);