linux-kernel - Re: [PATCH 3.16 046/114] batman-adv: Fix broadcast/ogm queue limit on a removed interface

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Date:	Tue, 14 Jun 2016 08:07:14 +0200
From:	Sven Eckelmann <sven@...fation.org>
To:	Ben Hutchings <ben@...adent.org.uk>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	akpm@...ux-foundation.org,
	Marek Lindner <mareklindner@...mailbox.ch>,
	Linus Lüssing <linus.luessing@...3.blue>,
	Antonio Quartulli <a@...table.cc>
Subject: Re: [PATCH 3.16 046/114] batman-adv: Fix broadcast/ogm queue limit on a removed interface

Hi,

On Monday 13 June 2016 23:53:06 Ben Hutchings wrote:
[...]
> 
> Yes, I recognise this bug.  I've updated this patch to the version below.

looks good to me. Thanks for updating the patch :)

Kind regards,
	Sven

> ---
> batman-adv: Fix broadcast/ogm queue limit on a removed interface
> 
> commit c4fdb6cff2aa0ae740c5f19b6f745cbbe786d42f upstream.
> 
> When removing a single interface while a broadcast or ogm packet is
> still pending then we will free the forward packet without releasing the
> queue slots again.
> 
> This patch is supposed to fix this issue.
> 
> Fixes: 6d5808d4ae1b ("batman-adv: Add missing hardif_free_ref in
> forw_packet_free") Signed-off-by: Linus Lüssing <linus.luessing@...3.blue>
> [sven@...fation.org: fix conflicts with current version]
> Signed-off-by: Sven Eckelmann <sven@...fation.org>
> Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
> Signed-off-by: Antonio Quartulli <a@...table.cc>
> Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
> ---
>  net/batman-adv/send.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> --- a/net/batman-adv/send.c
> +++ b/net/batman-adv/send.c
> @@ -611,6 +611,9 @@ batadv_purge_outstanding_packets(struct
> 
>  		if (pending) {
>  			hlist_del(&forw_packet->list);
> +			if (!forw_packet->own)
> +				atomic_inc(&bat_priv->bcast_queue_left);
> +
>  			batadv_forw_packet_free(forw_packet);
>  		}
>  	}
> @@ -638,6 +641,9 @@ batadv_purge_outstanding_packets(struct
> 
>  		if (pending) {
>  			hlist_del(&forw_packet->list);
> +			if (!forw_packet->own)
> +				atomic_inc(&bat_priv->batman_queue_left);
> +
>  			batadv_forw_packet_free(forw_packet);
>  		}
>  	}
> 
> -- 
> Ben Hutchings
> One of the nice things about standards is that there are so many of
> them.

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