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From: patchwork-bot+netdevbpf@kernel.org
To: Yiming Qian <yimingqian591@gmail.com>
Cc: security@kernel.org, john.fastabend@gmail.com,
	jakub@cloudflare.com, kuba@kernel.org, sd@queasysnail.net,
	davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
	horms@kernel.org, keenanat2000@gmail.com, netdev@vger.kernel.org,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Subject: Re: [PATCH net v2] net: skmsg: preserve sg.copy across SG transforms
Date: Tue, 16 Jun 2026 22:00:05 +0000	[thread overview]
Message-ID: <178164720514.1257010.17974091199123614376.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260610062137.49075-1-yimingqian591@gmail.com>

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Wed, 10 Jun 2026 06:21:36 +0000 you wrote:
> The sk_msg sg.copy bitmap is part of the scatterlist entry ownership
> state. A set bit tells sk_msg_compute_data_pointers() not to expose the
> entry through writable BPF ctx->data. This protects entries backed by
> pages that are not private to the sk_msg, such as splice-backed file
> page-cache pages.
> 
> Several sk_msg transform paths move, copy, split, or compact
> msg->sg.data[] entries without moving the matching sg.copy bit. This can
> make an externally backed entry arrive at a new slot with a clear copy
> bit. A later SK_MSG verdict can then expose sg_virt(sge) as writable
> ctx->data and BPF stores can modify the original page cache.
> 
> [...]

Here is the summary with links:
  - [net,v2] net: skmsg: preserve sg.copy across SG transforms
    https://git.kernel.org/netdev/net/c/406e8a651a7b

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html



      parent reply	other threads:[~2026-06-16 22:00 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-10  6:21 [PATCH net v2] net: skmsg: preserve sg.copy across SG transforms Yiming Qian
2026-06-11  6:22 ` sashiko-bot
2026-06-13 23:57 ` Jakub Kicinski
2026-06-16 22:00 ` patchwork-bot+netdevbpf [this message]

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