[Bridge] [PATCH net] bridge: Fix problems around fdb entries pointing to the bridge device

David Miller davem at davemloft.net
Wed Aug 10 04:51:28 UTC 2016


From: Toshiaki Makita <makita.toshiaki at lab.ntt.co.jp>
Date: Thu,  4 Aug 2016 11:11:19 +0900

> Adding fdb entries pointing to the bridge device uses fdb_insert(),
> which lacks various checks and does not respect added_by_user flag.
> 
> As a result, some inconsistent behavior can happen:
> * Adding temporary entries succeeds but results in permanent entries.
> * Same goes for "dynamic" and "use".
> * Changing mac address of the bridge device causes deletion of
>   user-added entries.
> * Replacing existing entries looks successful from userspace but actually
>   not, regardless of NLM_F_EXCL flag.
> 
> Use the same logic as other entries and fix them.
> 
> Fixes: 3741873b4f73 ("bridge: allow adding of fdb entries pointing to the bridge device")
> Signed-off-by: Toshiaki Makita <makita.toshiaki at lab.ntt.co.jp>

Applied, thanks.


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