netdev - Re: [PATCH v2] rhashtable: add restart routine in rhashtable_free_and

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Date:   Mon, 09 Jul 2018 16:29:51 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     ap420073@...il.com
Cc:     tgraf@...g.ch, herbert@...dor.apana.org.au, netdev@...r.kernel.org,
        fw@...len.de, pablo@...filter.org
Subject: Re: [PATCH v2] rhashtable: add restart routine in
 rhashtable_free_and_destroy()

From: Taehee Yoo <ap420073@...il.com>
Date: Sun,  8 Jul 2018 11:55:51 +0900

> rhashtable_free_and_destroy() cancels re-hash deferred work
> then walks and destroys elements. at this moment, some elements can be
> still in future_tbl. that elements are not destroyed.
> 
> test case:
> nft_rhash_destroy() calls rhashtable_free_and_destroy() to destroy
> all elements of sets before destroying sets and chains.
> But rhashtable_free_and_destroy() doesn't destroy elements of future_tbl.
> so that splat occurred.
> 
> test script:
 ...
> Splat looks like:
 ...
> V2:
>  - free all tables requested by Herbert Xu
> 
> Signed-off-by: Taehee Yoo <ap420073@...il.com>

Applied and queued up for -stable.