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

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Message-ID: <3a9c2e94-3c45-5f83-c703-75e1cde13be1@nbd.name>
Date:   Mon, 21 Nov 2022 20:45:14 +0100
From:   Felix Fietkau <nbd@....name>
To:     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>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     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 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