From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa2-f12.google.com (mail-oa2-f12.google.com [74.125.231.76]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DE0948032B for ; Tue, 15 Sep 2026 23:11:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.231.76 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789513909; cv=none; b=dnf1GlJkS5CiVDA67xGQGv0l/bhU7TBhTbwL/POAiLTp3bA3xR/sQePbAWjUIGilM/uyG4iah4cp3VRSkwfgIf6UNC+Y6WCUDOVsySUo5EBpxxX5QYEt2jBk1IzoElZvjCX1tovSRTdqcaIZKTCab92VtsnQulhVWvMLNHHVjrk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789513909; c=relaxed/simple; bh=eLY850UsuQ+Evp+x0UEhaZgYKr4IhiMJmvs2OTuixIU=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=tnjT8zBcSpcCWb5Z9o3dX+Z/nLd/56fvYxgeX2vG6cGtwkIzldIMzgHmWz5bx6qjqEcjt7UgrWyX/Zg/VUb0r3WtIddXMfL8b9gITOcaCuRIjbO3vC2MOwoso21WZqXsLEWi8kW2mLqduPIfde39jtdLYBhqClWqwWuu8JgpGoA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=TZtZwqoT; arc=none smtp.client-ip=74.125.231.76 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="TZtZwqoT" Received: by mail-oa2-f12.google.com with SMTP id 586e51a60fabf-466ccdd77e3so211551fac.2 for ; Tue, 15 Sep 2026 16:11:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789513906; x=1790118706; darn=vger.kernel.org; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:from:to:cc:subject:date:message-id :reply-to:content-type; bh=m9RVSLO7zgrPbxXav/0bBnn0dj8GNqIO7QvejQ6D/5E=; b=TZtZwqoTCm/p3JV4G6WJ9eWwDM0Ynj1n0HMF7tuvxgwKnDorazgSVzVjh/c3/t6oZN kCDQUL8t6+RBh35h7kmnNCViR0xP2s4ktDJw9enRxvGV4hSloZBO3AjPNM+P/nXFg6FJ bGFHEZjfmJsnRJQjAxrUd9H7p/IG938Uvb1pU/mubyp5aab94tk7LkWjPkJ0TBEmIr+a ex32x4DVYP5EFGPHOEuSu7/M/OGFYLzyeq0LRN/aCs080XAhaJrBrBtfZhnj6MsIt6mt qa41vv4Y6Avh6CJX5bGsMt+XyijP9yvMkEUv6amYMNG63Z4gZuAazU0R2ZhnTwFWIr4A NPWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789513906; x=1790118706; h=cc:to:content-transfer-encoding:content-type:mime-version :message-id:date:subject:from:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to:content-type; bh=m9RVSLO7zgrPbxXav/0bBnn0dj8GNqIO7QvejQ6D/5E=; b=XiS1JnIAEMJXBR3b+xgLpQb9TuAcmVM97bh8HzCYos7vawLEN/xZ7dM38WSzKUOqTd cfKhJNtO17bdkAevex69Zf7TPTXX9s6rOwLN3BfmA+KIJAaCR1SE92o1KTuvtSu1WKzl /GScGvdeveMUz4m7VMRcixYXqjwIRkt3KvYg1cymtNoAAwkoqjie7S3H2ekdgquYxB8U SNJy6L7dEt71Rvox4NUSjYiIw9segT4xEuS6FbpS+84n5Gz8sQYOFarH+4MASpPUulP1 4nhdUiQh5Ov4rxcEmqdH1LmbEkn+t7nJZiSacccncdxiWPPKe/KIe0RLiKuzoEK88stb fJIw== X-Forwarded-Encrypted: i=1; AKwUvBxvHneNK9S4REpid1b6sU4C6U8iz97gD9ech8lMIyUxLueHf52N1dESS6VM2vTo8k+SNNcqpjaBlLPZ3qM=@vger.kernel.org X-Gm-Message-State: AFuF++nYJjZx5VSZ4nHeSF5UUfy9G4UuIddAAiVsjXwP+RMf9HH7a8wP CNF587BN4qfEXZ1AFHOir7El5XvHWhuuki4GAxsvpKVf0MTjOEV2ZgRf X-Gm-Gg: AYBFou1lRPp4JaxFDwKFM+OULISffcwKipYNPYopsDH6u3u9/L/Q7R2p4HCcSfX0UOf FfThsTzGV75B3w8VDurtODi7aaTyWbApsSS9gxB+EreVrmNJ5BOzU6NRWGCSwNTlHU7BhRcCtT+ 1CxUTA382ewpubFChGxnCYUvN9x6uI8uhhfyJi/H6ap+XSg5j5nwz5sZFHqEfnZkk5YLaVE59sk vPzlNyTRYWhMYBnMmYAhzjvCWDgUElJmLg0b7CMyl7kNzcRO4SvKwycSMmp2HWDgrHNEZeFMZcc OvQ1/gLrgLlHMC+iHjmX7CIcg7mx/ixTpUtK6kVO8bXJtvZ2rjyBuPi7+eUOGjydDGtTd7PkUzT yHu5A2FhNBxoW/f07BgiqCf7nEE2epmPVuzMsgCDWoQbAbqUYFMU5tSBrB+9o5+Wzco50y9s5Qv 9FE4fI86fkpye6I+LmvoOaZ63vhAndTv4iK746Dd2X0SIpzr+EAQX5fEdl8HPR0DQJ8fA= X-Received: by 2002:a05:6820:1c8d:b0:6be:4117:ae1e with SMTP id 006d021491bc7-6c7d15cb063mr627279eaf.14.1789513906368; Tue, 15 Sep 2026 16:11:46 -0700 (PDT) Received: from localhost ([2a03:2880:30ff:6::]) by smtp.gmail.com with ESMTPSA id 586e51a60fabf-48429a9213fsm1194432fac.3.2026.09.15.16.11.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Sep 2026 16:11:46 -0700 (PDT) From: Daniel Zahka Subject: [PATCH net v2 0/2] net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb() Date: Tue, 15 Sep 2026 16:11:36 -0700 Message-Id: <20260915-psp-ktls-fix-v2-0-0eedc3b148ec@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAKjQqWoC/1WNwQqDMBBEf0X23C1J1Io99T+KhyVudKkaSSS0i P/eYE89zhvmzQ6Rg3CEe7FD4CRR/JKDuRRgR1oGRulzBqPMTbWqxTWu+NqmiE7eWDVEpunbunY G8mQNnPGpe8LCG3QZjhI3Hz7nRdJn9bNp9W9LGhVy6UpFxJYqfgwzyXS1fobuOI4vO+B9mK0AA AA= To: Eric Dumazet , Neal Cardwell , Kuniyuki Iwashima , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Simon Horman , Willem de Bruijn , Andrew Lunn , Shuah Khan Cc: Willem de Bruijn , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org X-Mailer: b4 0.13.0 Sashiko's review of commit da630d1da2b1 ("netdevsim: psp: drop tx key ops") [1] showed that there is a hazard between PSP and offloaded TLS, where both can clobber what the other set in the sk_validate_xmit_skb callback. It was discussed further on the mailing list [2], and it was pointed out that there are conflicts with PSP and TLS ULP both using the skb->decrypted bit. The simplest fix is to make psp and tls mutually exclusive. This series goes a bit further and makes psp exclusive with all TCP ULPs. The PSP implementation that we have is not designed to be used with any TCP ULP, so don't allow a socket to have state for both. I will send a subsequent series to net-next which will remove the ability to perform the rx-assoc and tx-assoc psp netlink calls on sockets that are not in the TCP_ESTABLISHED state. This will close the remaining quirk that a sk_clone() on a listen socket with psp tx-assoc state will leave a stale sk->sk_validate_xmit_skb call back on a new, non-psp socket. I do not believe that change needs to be regarded as a fix, because it only stands to add unecessary validation code in the tx path. [1]: https://sashiko.dev/#/patchset/20260903-psp-prep-v1-0-d47e9c4c375d%40gmail.com [2]: https://lore.kernel.org/netdev/20260903-psp-prep-v1-0-d47e9c4c375d@gmail.com/ Signed-off-by: Daniel Zahka --- Changes in v2: - remove check on sk->sk_validate_xmit_skb in both tls and psp setup paths - Link to v1: https://lore.kernel.org/r/20260910-psp-ktls-fix-v1-0-e3f30aaeca4e@gmail.com --- Daniel Zahka (2): net: psp: avoid conflicts with skb->decrypted and sk_validate_xmit_skb() selftests: drv-net: psp: test PSP and TCP ULP mutual exclusion include/net/sock.h | 2 ++ net/core/sock.c | 7 +++++ net/ipv4/tcp_ulp.c | 4 +++ net/psp/psp_sock.c | 4 +++ tools/testing/selftests/drivers/net/config | 1 + tools/testing/selftests/drivers/net/psp.py | 46 ++++++++++++++++++++++++++++++ 6 files changed, 64 insertions(+) --- base-commit: 83a945a529d6e002dd7339c532288a931f463dba change-id: 20260909-psp-ktls-fix-47aa27d955f2 Best regards, -- Daniel Zahka