On 7/10/26 4:20 PM, Paolo Abeni wrote:

On 7/8/26 6:04 PM, Eric Dumazet wrote:

quoted

This patch series converts VXLAN configuration (`struct vxlan_config`)
to be RCU-protected, allowing lockless readers and enabling RTNL-less
`vxlan_fill_info()` netlink link info dumping.

Work has been split into three distinct parts:

1. Refactor helper functions in RX, TX, MDB, VNIFILTER, and OVS paths to
   accept a `const struct vxlan_config *cfg` pointer (or pass specific
   fields such as `flags`/`saddr_family`) rather than accessing
   `vxlan->cfg` directly.

2. Convert `vxlan->cfg` from an embedded struct into an RCU-protected
   pointer (`struct vxlan_config __rcu *cfg`), dynamically allocated on
   device creation or changelink, and freed via `kfree_rcu()`. Update
   offload drivers (`mlxsw`) and OVS (`vport-vxlan.c`) accordingly.

3. Update `vxlan_fill_info()` to run under `rcu_read_lock()` instead of
   relying on RTNL lock, completing the transition to lockless link info
   dumping for VXLAN devices.

I *suspect* this is triggering RCU splat in forwarding self-tests:

[ 1955.481960][T11074] =============================

oops, sashiko already spotted it:

https://sashiko.dev/#/patchset/20260708160411.1355008-1-edumazet%40google.com

/P