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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Clear (ClamAV 1.0.9/27770/Mon Sep 22 10:26:19 2025) On 9/22/25 6:48 PM, Stanislav Fomichev wrote: > On 09/19, Daniel Borkmann wrote: [...] >> @@ -143,6 +146,10 @@ int xsk_reg_pool_at_qid(struct net_device *dev, struct xsk_buff_pool *pool, >> return -EINVAL; >> if (xsk_get_pool_from_qid(dev, queue_id)) >> return -EBUSY; >> + if (queue_id < dev->real_num_rx_queues) >> + __netif_get_rx_queue_peer(&dev, &queue_id); >> + if (xsk_get_pool_from_qid(dev, queue_id)) >> + return -EBUSY; >> >> pool->netdev = dev; >> pool->queue_id = queue_id; > > I feel like both of the above are also gonna be problematic wrt netdev > lock. The callers lock the netdev, the callers will also have > to resolve the virtual->real queue mapping. Hacking up the > queue/netdev deep in the call stack in a few places is not gonna work. > > Maybe also add assert for the (new) netdev lock to __netif_get_rx_queue_peer > to trigger these. Good idea, and I'll look into this, thx!