[pve-devel] [PATCH] run-env: fallback to all zero mac for interfaces without

[Gabriel Goller]

On 11.07.2025 10:03, Christian Ebner wrote:
>The installer assumes to have a valid mac address for all interfaces
>as provided by the runtime env json file. Deserialization will fail
>if this is not the case.
>
>In some cases, the interface might however not provide a valid MAC
>address, for example the WWAN module without any SIM installed on
>some laptops.
>
>Fix this by defaulting to an all zero MAC address if non is detected.
>
>Signed-off-by: Christian Ebner <c.ebner at proxmox.com>
>---
>Please note: Untested, but I can test it based on an iso installer on
>affected hardware
>
> Proxmox/Install/RunEnv.pm | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/Proxmox/Install/RunEnv.pm b/Proxmox/Install/RunEnv.pm
>index e4f0eb0..d7ee258 100644
>--- a/Proxmox/Install/RunEnv.pm
>+++ b/Proxmox/Install/RunEnv.pm
>@@ -110,7 +110,7 @@ my sub query_netdevs : prototype() {
>         $ifs->{$name} = {
>             index => $index,
>             name => $name,
>-            mac => $mac,
>+            mac => $mac // '00:00:00:00:00:00',
>             state => uc($state),
>         };
>         $ifs->{$name}->{addresses} = \@valid_addrs if @valid_addrs;

To be honest I'd rather filter out this interface. A zeroed out mac is
reserved for loopback interfaces and usually isn't routed.