From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-173.mta1.migadu.com (out-173.mta1.migadu.com [95.215.58.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78FC52E2286 for ; Tue, 21 Apr 2026 15:59:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776787159; cv=none; b=jlaCquQgafIJsUeDhJryDnopuIOrqiCoiLNxHi6RrpYGWMmpjyZIUY2u8OGbrmM+Xvc0d4F48rn3Kua6DQ3dk9KuJbb0ZFQwovPFI26g2hOCMDy5h1vfiRQBPMKPQ3cQzrDsG0PsKUF2C6HtFg+aFGN6NtgqfSLLjabbKfy7DWc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776787159; c=relaxed/simple; bh=k6+jasbC8ffBzSw2C6ofjZu8PltLDxN6zHPlBDQJS7A=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=sXsQ8hJ9joG5g+nbcEDFVPpCA0IAXYnHsN6uWizdJhgFyVatnQt7CMb2LcnJ7sC70wqX12iGMonnECdJhJwYsLKdvdANwiQs7B6vjMKnO78mmCuFQzAANbnBX3h1xyBSB/PdJi2532GhVrkgbiPALvvNzyJR5FFfnJt+d2Wl+aw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Rgn6Z7U/; arc=none smtp.client-ip=95.215.58.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Rgn6Z7U/" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1776787145; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=+aOQ3Xw/RZsMMWfJ+rkdu/KGc82gkMlhZ8lAN8cJ7wE=; b=Rgn6Z7U/ep50s2sSwEmPX+H6pBOF1dVOqSD+yEIoouTNOPZ/4dOR+LdqWKRwkhmPU4iOuu dmdF64UUquroRvHI1Ru2Z8Y/otfetGt84RzlBFzvxGuEezxFgQYiMdf6rh/fJv3S8DUR+V v9kk1rlOeOc3sZSh1hj8RTLsMT5ZuA0= From: KaFai Wan To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, memxor@gmail.com, song@kernel.org, yonghong.song@linux.dev, jolsa@kernel.org, sdf@fomichev.me, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, dsahern@kernel.org, shuah@kernel.org, ihor.solodrai@linux.dev, kafai.wan@linux.dev, jiayuan.chen@linux.dev, hoyeon.lee@suse.com, ameryhung@gmail.com, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH bpf-next v4 0/4] bpf: Reject TCP_NODELAY in TCP header option Date: Tue, 21 Apr 2026 23:58:00 +0800 Message-ID: <20260421155804.135786-1-kafai.wan@linux.dev> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT This small patchset is about avoid infinite recursion in TCP header option callbacks and bpf-tcp-cc callbacks via TCP_NODELAY setsockopt. v4: - Fix the test case for TCP header option callbacks (Martin and Jiayuan) - Reject TCP_NODELAY in bpf-tcp-cc callbacks (AI and Martin) - Add a test case for bpf-tcp-cc v3: - Remove CONFIG_INET check and add comment (Martin and Jiayuan) - Fix the test case (Martin) https://lore.kernel.org/bpf/20260417092035.2299913-1-kafai.wan@linux.dev/ v2: - Reject TCP_NODELAY in bpf_sock_ops_setsockopt() (AI and Martin) https://lore.kernel.org/bpf/20260416112308.1820332-1-kafai.wan@linux.dev/ v1: https://lore.kernel.org/bpf/20260414112310.1285783-1-kafai.wan@linux.dev/ --- KaFai Wan (4): bpf: Reject TCP_NODELAY in TCP header option callbacks bpf: Reject TCP_NODELAY in bpf-tcp-cc selftests/bpf: Test TCP_NODELAY in TCP hdr opt callbacks selftests/bpf: Verify bpf-tcp-cc rejects TCP_NODELAY include/linux/bpf.h | 1 + net/core/filter.c | 30 +++++++++++++++++++ net/ipv4/bpf_tcp_ca.c | 2 +- .../selftests/bpf/prog_tests/bpf_tcp_ca.c | 4 +++ .../bpf/prog_tests/tcp_hdr_options.c | 6 ++++ tools/testing/selftests/bpf/progs/bpf_cubic.c | 12 ++++++++ .../bpf/progs/test_misc_tcp_hdr_options.c | 15 +++++++++- 7 files changed, 68 insertions(+), 2 deletions(-) -- 2.43.0