From: Jakub Kicinski <kuba@kernel.org>
To: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Qihang <q.h.hack.winter@gmail.com>,
netdev@vger.kernel.org, daniel.zahka@gmail.com,
davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
horms@kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH net v5 2/2] packet: use consistent hard_header_len in TX_RING send path
Date: Tue, 4 Aug 2026 16:43:24 -0700 [thread overview]
Message-ID: <20260804164324.49528d7c@kernel.org> (raw)
In-Reply-To: <willemdebruijn.kernel.ad7f187edf35@gmail.com>
On Mon, 03 Aug 2026 23:04:54 -0400 Willem de Bruijn wrote:
> If I read Gemini feedback correctly, all reports are about the current
> solution falling short of fixing the instance of this race condition
> with dev_hard_header(), which reads dev->hard_header_len directly.
> The patch indeed mentions this limitation.
To be clear -- prefer looking that the netdev-ai instance.
It cross reviews the feedback with different LLMs
> As well as the same issue with dev_validate_header(), which the commit
> does not list as limitation. But that one is only reached with variable
> length L2 protocols.
>
> Side note, in net-next I can probably remove header_ops.validate now
> that ax25 is gone, and with that all of dev_validate_header. No other
> variable length L2 protocol ever implemented that callback.
Let's do it.
next prev parent reply other threads:[~2026-08-04 23:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-30 8:29 [PATCH net v5 0/2] packet: use consistent hard_header_len in send paths Qihang
2026-07-30 8:29 ` [PATCH net v5 1/2] packet: use consistent hard_header_len in non-ring " Qihang
2026-07-30 8:29 ` [PATCH net v5 2/2] packet: use consistent hard_header_len in TX_RING send path Qihang
2026-07-30 9:22 ` Willem de Bruijn
2026-08-04 2:22 ` Jakub Kicinski
2026-08-04 3:04 ` Willem de Bruijn
2026-08-04 23:43 ` Jakub Kicinski [this message]
2026-08-05 13:35 ` Willem de Bruijn
2026-08-04 9:00 ` [PATCH net v6 0/3] net: fix hard_header_len races in packet send paths Qihang
2026-08-04 9:00 ` [PATCH net v6 1/3] net: remove CAP_SYS_RAWIO zero-padding in dev_validate_header Qihang
2026-08-04 12:16 ` Willem de Bruijn
2026-08-04 23:44 ` Jakub Kicinski
2026-08-04 9:32 ` [PATCH net v6 2/3] packet: use consistent hard_header_len in non-ring send paths Qihang
2026-08-04 9:33 ` [PATCH net v6 3/3] packet: use consistent hard_header_len in TX_RING send path Qihang
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