On Sun, Jun 07, 2026 at 08:04:17AM -0700, Stephen Hemminger wrote:
> Libraries that use EAL_REGISTER_TAILQ insert a pointer to a static
> struct rte_tailq_elem into the process-local tailq list via a
> constructor, but have no matching destructor. When such a library
> is loaded as a dependency of a plugin via dlopen() and later
> unloaded via dlclose(), the list retains a dangling pointer to the
> now-unmapped static. Reloading the plugin crashes in
> rte_eal_tailq_local_register() when it traverses the stale entry.
>
> Add rte_eal_tailq_unregister() and extend the EAL_REGISTER_TAILQ
> macro to emit an RTE_FINI destructor alongside the existing
> RTE_INIT constructor. Every library that uses the macro
> automatically gets both sides; no per-library changes are needed.
>
> Bugzilla ID: 1081
> Fixes: 873a61c7526b ("tailq: introduce dynamic register system")
> Cc: [email protected]
>
> Signed-off-by: Stephen Hemminger <[email protected]>
> ---
Acked-by: Bruce Richardson <[email protected]>
