linux-kernel - Re: [PATCH] netfilter: nfnetlink: fix potential dead lock in nfnetlink_rcv

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Message-ID: <20221103110341.GA29268@breakpoint.cc>
Date:   Thu, 3 Nov 2022 12:03:41 +0100
From:   Florian Westphal <fw@...len.de>
To:     Ziyang Xuan <william.xuanziyang@...wei.com>
Cc:     pablo@...filter.org, kadlec@...filter.org, fw@...len.de,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] netfilter: nfnetlink: fix potential dead lock in
 nfnetlink_rcv_msg()

Ziyang Xuan <william.xuanziyang@...wei.com> wrote:
> When type is NFNL_CB_MUTEX and -EAGAIN error occur in nfnetlink_rcv_msg(),
> it does not execute nfnl_unlock(). That would trigger potential dead lock.
>
> Fixes: 50f2db9e368f ("netfilter: nfnetlink: consolidate callback types")

Applied to nf:testing, thanks.