[PATCH v2 2/2] fix eal/freebsd: unregister alarm callback before free

[Bruce Richardson]

On Fri, May 30, 2025 at 09:18:44AM +0100, Rui Ferreira wrote:
> Unregister callback on cleanup to avoid use after free from the
> interrupt thread (eal_intr_thread_main).
> 
> To be more defensive, set ptr to NULL if we can unregister.
> 
> rte_intr_callback_unregister_sync may (optionally) use traces
> so the alarm cleanup must happen before eal_trace_fini to avoid
> accessing freed memory.
> 
> Bugzilla ID: 1683

Source of bug is probably:

Fixes: 90b13ab8d4f7 ("alarm: remove direct access to interrupt handle")

> 
> Signed-off-by: Rui Ferreira <rui.ferreira1 at h-partners.com>

Patch looks ok to me.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>