netdev - Re: [PATCH v2] bridge: Fix crash with vlan filtering and tcpdump

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Date:	Fri, 28 Mar 2014 12:33:11 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	Vlad Yasevich <vyasevic@...hat.com>, netdev@...r.kernel.org
CC:	bridge@...ts.linux-foundation.org
Subject: Re: [PATCH v2] bridge: Fix crash with vlan filtering and tcpdump

(2014/03/28 10:51), Vlad Yasevich wrote:
> When the vlan filtering is enabled on the bridge, but
> the filter is not configured on the bridge device itself,
> running tcpdump on the bridge device will result in a
> an Oops with NULL pointer dereference.  The reason
> is that br_pass_frame_up() will bypass the vlan
> check because promisc flag is set.  It will then try
> to get the table pointer and process the packet based
> on the table.  Since the table pointer is NULL, we oops.
> Catch this special condition in br_handle_vlan().
> 
> Reported-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> CC: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>

Thanks,

Acked-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
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