Wireguard kernel module won't load on kernel 4.19.0-5 (Debian sid/buster)

[Laszlo KERTESZ]

I have this kernel on Debian Stretch (from backports) and wireguard works
just fine with it.


On Sat, Jun 22, 2019 at 10:52 AM Nils Cant <nils at krash.be> wrote:

> Hello,
>
> I'm unable to load the wireguard kernel module on Debian Sid or Debian
> Buster. (4.19.0-5-amd64 kernel)
> (Debian buster is scheduled to be promoted to stable in a couple of weeks)
>
> root at buster:~# modprobe wireguard
> modprobe: ERROR: could not insert 'wireguard': Invalid argument
> root at buster:~# modinfo wireguard
> filename: /lib/modules/4.19.0-5-amd64/updates/dkms/wireguard.ko
> alias: net-pf-16-proto-16-family-wireguard
> alias: rtnl-link-wireguard
> version: 0.0.20190601
> author: Jason A. Donenfeld <Jason at zx2c4.com>
> description: WireGuard secure network tunnel
> license: GPL v2
> srcversion: 69000E9D4B2B253E97C189A
> depends: udp_tunnel,ip6_udp_tunnel
> retpoline: Y
> name: wireguard
> vermagic: 4.19.0-5-amd64 SMP mod_unload modversions
>
> The same version seems to work fine on Debian Stretch (4.9.0-9) or Fedora
> Core 30 (5.1.11-300)
>
> The kernel ring throws a number of symbol version errors:
>
> [...]
> [ 97.450944] wireguard: loading out-of-tree module taints kernel.
> [ 97.453335] wireguard: module verification failed: signature and/or
> required key missing - tainting kernel
> [ 97.457727] wireguard: disagrees about version of symbol skb_put
> [ 97.459772] wireguard: Unknown symbol skb_put (err -22)
> [ 97.461555] wireguard: disagrees about version of symbol ip6_dst_hoplimit
> [ 97.463609] wireguard: Unknown symbol ip6_dst_hoplimit (err -22)
> [ 97.465590] wireguard: disagrees about version of symbol consume_skb
> [ 97.467495] wireguard: Unknown symbol consume_skb (err -22)
> [ 97.469326] wireguard: disagrees about version of symbol udp_sock_create4
> [...]
>
> I have tried both the apt package from debian unstable, as well as compile
> from source.
>
> Any idea what could be going wrong? Is this a Debian kernel bug?
>
>
> Thanks in advance,
>
> Nils
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>
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