linux-kernel - Re: [PATCH] netfilter: nf_flow

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Message-ID: <441bcda3-403f-0bf6-2d6f-d8c9d2ce44d6@nbd.name>
Date:   Mon, 21 Nov 2022 21:08:12 +0100
From:   Felix Fietkau <nbd@....name>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     netfilter-devel@...r.kernel.org,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netfilter: nf_flow_table: add missing locking

On 21.11.22 20:47, Eric Dumazet wrote:
> On Mon, Nov 21, 2022 at 11:45 AM Felix Fietkau <nbd@....name> wrote:
>>
>> On 21.11.22 19:26, Felix Fietkau wrote:
>> > nf_flow_table_block_setup and the driver TC_SETUP_FT call can modify the flow
>> > block cb list while they are being traversed elsewhere, causing a crash.
>> > Add a write lock around the calls to protect readers
>> >
>> > Signed-off-by: Felix Fietkau <nbd@....name>
>> Sorry, I forgot to add this:
>>
>> Reported-by: Chad Monroe <chad.monroe@...rtrg.com>
>>
>> - Felix
> 
> Hi Felix
> 
> Could you also add a Fixes: tag ?
I don't know which commit to use for that tag.

- Felix