Re: [PATCH] af_packet: Raw socket destruction warning fix

[Maninder Singh]

Hi Daniel,

>The other sock_put() in packet_release() to drop the final ref and call into
>sk_free(), which drops the 1 ref on the sk_wmem_alloc from init time. Since you
>got into __sk_free() via sock_wfree() destructor, your socket must have invoked
>packet_release() prior to this (perhaps kernel destroying the process).
>
>What kernel do you use?

Issue is coming for 3.10.58.

>> Driver calls dev_kfree_skb_any->dev_kfree_skb_irq
>> and it adds buffer in completion queue to free and raises softirq NET_TX_SOFTIRQ
>>
>> net_tx_action->__kfree_skb->skb_release_all->skb_release_head_state->sock_wfree->
>> __sk_free->packet_sock_destruct
>>
>> Also purging of receive queue has been taken care in other protocols.