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