netdev - Re: [PATCH v2] net: fix problem in dequeuing from input_pkt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 21 May 2010 08:55:46 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	davem@...emloft.net, xiaosuo@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v2] net: fix problem in dequeuing from input_pkt_queue

Le jeudi 20 mai 2010 à 21:37 -0700, Tom Herbert a écrit :
> Fix some issues introduced in batch skb dequeuing for input_pkt_queue.
> The primary issue it that the queue head must be incremented only
> after a packet has been processed, that is only after
> __netif_receive_skb has been called.  This is needed for the mechanism
> to prevent OOO packet in RFS.  Also when flushing the input_pkt_queue
> and process_queue, the process queue should be done first to prevent
> OOO packets.
> 
> Because the input_pkt_queue has been effectively split into two queues,
> the calculation of the tail ptr is no longer correct.  The correct value
> would be head+input_pkt_queue->len+process_queue->len.  To avoid
> this calculation we added an explict input_queue_tail in softnet_data.
> The tail value is simply incremented when queuing to input_pkt_queue.
> 
> Signed-off-by: Tom Herbert <therbert@...gle.com>
> ---

Acked-by: Eric Dumazet <eric.dumazet@...il.com>


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html