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From: patchwork-bot+netdevbpf@kernel.org
To: Jason Xing <kerneljasonxing@gmail.com>
Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
	pabeni@redhat.com, bjorn@kernel.org, magnus.karlsson@intel.com,
	maciej.fijalkowski@intel.com, jonathan.lemon@gmail.com,
	sdf@fomichev.me, ast@kernel.org, daniel@iogearbox.net,
	hawk@kernel.org, john.fastabend@gmail.com, horms@kernel.org,
	andrew+netdev@lunn.ch, bpf@vger.kernel.org,
	netdev@vger.kernel.org, kernelxing@tencent.com
Subject: Re: [PATCH net v5] xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata()
Date: Thu, 04 Jun 2026 01:14:20 +0000	[thread overview]
Message-ID: <178053566039.2042071.1462371315566294486.git-patchwork-notify@kernel.org> (raw)
In-Reply-To: <20260530042630.80626-1-kerneljasonxing@gmail.com>

Hello:

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

On Sat, 30 May 2026 12:26:30 +0800 you wrote:
> From: Jason Xing <kernelxing@tencent.com>
> 
> The TX metadata area resides in the UMEM buffer which is memory-mapped
> and concurrently writable by userspace. In xsk_skb_metadata(),
> csum_start and csum_offset are read from shared memory for bounds
> validation, then read again for skb assignment. A malicious userspace
> application can race to overwrite these values between the two reads,
> bypassing the bounds check and causing out-of-bounds memory access
> during checksum computation in the transmit path.
> 
> [...]

Here is the summary with links:
  - [net,v5] xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata()
    https://git.kernel.org/netdev/net/c/22ba97ea9cc1

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



      parent reply	other threads:[~2026-06-04  1:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-30  4:26 [PATCH net v5] xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata() Jason Xing
2026-05-31  4:27 ` sashiko-bot
2026-05-31  5:00   ` Jason Xing
2026-06-01 15:18 ` Stanislav Fomichev
2026-06-04  1:14 ` patchwork-bot+netdevbpf [this message]

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