On Wed, Mar 05, 2025 at 10:38:36AM +0200, Nikolay Aleksandrov wrote:
@@ -617,8 +614,18 @@ static void bond_ipsec_del_sa_all(struct bonding *bond) mutex_lock(&bond->ipsec_lock); list_for_each_entry(ipsec, &bond->ipsec_list, list) {
Second time - you should use list_for_each_entry_safe if you're walking and deleting elements from the list.
Sorry, I missed this comment. I will update in next version.
spin_lock_bh(&ipsec->xs->lock);
continue;
goto next;if (ipsec->xs->km.state == XFRM_STATE_DEAD) {/* already dead no need to delete again */if (real_dev->xfrmdev_ops->xdo_dev_state_free)real_dev->xfrmdev_ops->xdo_dev_state_free(ipsec->xs);Have you checked if .xdo_dev_state_free can sleep? I see at least one that can: mlx5e_xfrm_free_state().
Hmm, This brings us back to the initial problem. We tried to avoid calling a spin lock in a sleep context (bond_ipsec_del_sa), but now the new code encounters this issue again.
With your reply, I also checked the xdo_dev_state_add() in bond_ipsec_add_sa_all(), which may also sleep, e.g. mlx5e_xfrm_add_state(),
If we unlock the spin lock, then the race came back again.
Any idea about this?
thanks Hangbin