Bug#1108860: linux-image-6.1.0-34-amd64: Wireguard fragmentation fails with VXLAN since kernel 6.1.0-34, causing network timeouts

Hi, Saw that. I will try to provide a reproducible setup with an Ansible playbook or something. Give me a few more days for that. Thanks, - Charles On Tue, Jul 15, 2025, at 14:55, Salvatore Bonaccorso wrote: > Hi Charles, > > On Sun, Jul 13, 2025 at 08:41:39AM +0200, rough.rock3...@datachamp.fr

Bug#1108860: linux-image-6.1.0-34-amd64: Wireguard fragmentation fails with VXLAN since kernel 6.1.0-34, causing network timeouts

Hi Salvatore, Thank you for your guidance and for pointing out the relevant commit. I have tested, checking out from tag 6.1.134: - With the revert of commit b88786ea2c8f ("tunnels: Accept PACKET_HOST in skb_tunnel_check_pmtu()"): the issue does not appear and everything works as expected - Wit

Bug#1108860: linux-image-6.1.0-34-amd64: Wireguard fragmentation fails with VXLAN since kernel 6.1.0-34, causing network timeouts

Hi, Thank you for the quick reply. We tried kernel versions 6.12.35-1 from unstable and 6.15.4-1 from experimental and the issue still appears on both versions. We are currently bisecting the changes to identify the commit. This will take several days as the server is used in production and we