From: Jakub Kicinski <kuba@kernel.org>
To: Runyu Xiao <runyu.xiao@seu.edu.cn>
Cc: davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
horms@kernel.org, leitao@debian.org, sashal@kernel.org,
bigeasy@linutronix.de, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, jianhao.xu@seu.edu.cn
Subject: Re: [RFC PATCH net-next] netpoll: hold RCU while walking napi_list
Date: Sat, 27 Jun 2026 14:21:05 -0700 [thread overview]
Message-ID: <20260627142105.29f1322c@kernel.org> (raw)
In-Reply-To: <20260627101228.1191586-1-runyu.xiao@seu.edu.cn>
On Sat, 27 Jun 2026 18:12:28 +0800 Runyu Xiao wrote:
> CONFIG_PROVE_RCU_LIST reports the poll_napi() traversal when the helper
> is exercised directly from netpoll_poll_dev(). The current source has
> important lifetime defenses around NAPI deletion and netpoll device
> close, so this is not presented as a proven use-after-free. The issue is
> that the RCU-list reader contract is implicit at the helper boundary.
Please provide the stack trace from the report, rather than just saying
that you can trigger it.
--
pw-bot: rfc
prev parent reply other threads:[~2026-06-27 21:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-27 10:12 [RFC PATCH net-next] netpoll: hold RCU while walking napi_list Runyu Xiao
2026-06-27 21:21 ` Jakub Kicinski [this message]
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