[Bug 263229] virtio vtnet driver with rxcsum errors

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263229

--- Comment #8 from Danilo Egea Gondolfo <danilo@FreeBSD.org> ---
Hi,

I just updated and rebuilt my kernel and I'm still seeing the same problem on
main:

root@freebsd:~ # ifconfig
vtnet0: flags=1008843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,LOWER_UP> metric 0
mtu 1500
       
options=4c07bb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,VLAN_HWTSO,LINKSTATE,TXCSUM_IPV6>
        ether 00:16:3e:10:64:20
        inet6 fe80::216:3eff:fe10:6420%vtnet0 prefixlen 64 scopeid 0x1
        media: Ethernet autoselect (10Gbase-T <full-duplex>)
        status: active
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
lo0: flags=1008049<UP,LOOPBACK,RUNNING,MULTICAST,LOWER_UP> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet 127.0.0.1 netmask 0xff000000
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
        groups: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
root@freebsd:~ # dhclient vtnet0
DHCPREQUEST on vtnet0 to 255.255.255.255 port 67
DHCPREQUEST on vtnet0 to 255.255.255.255 port 67
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 6
5 bad udp checksums in 5 packets
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 18
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 7
DHCPDISCOVER on vtnet0 to 255.255.255.255 port 67 interval 4
5 bad udp checksums in 5 packets
No DHCPOFFERS received.
Trying recorded lease 10.86.126.93
bound: renewal in 601 seconds.

When I disable rxcsum and txcsum it works again.

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