From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-182.mta0.migadu.com (out-182.mta0.migadu.com [91.218.175.182]) (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 0FF6333689D for ; Tue, 21 Jul 2026 02:41:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784601675; cv=none; b=g/XPfsdg2uYA++pfFcFu2wO58juh9cSmnietDJyXpnJQQH2THxyU4vgcpA+w77/YgEBCcZ/8ZTFD1Bn2GN8iV7d3E9Enj5nPtuN8+pip8d+NcsYV6x8yZl3JHIjVZ9JN51OypYlYD8Q3gnRlJxxGcxOFKaBoCCuB3UlZ9QpoUlk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784601675; c=relaxed/simple; bh=riqDSM8I2gXLZ6gaEzgPmh+iJYoWPbOMw4uhJ82DTck=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ekSCcc5J+s2XUFKCqIJTLoi2+DFngXFyJdrkzLp02F6sZLYlccV6lKzl3vYQRYyK8s9awXoRbxKnyHeQENSuPSAQz+68tNS+1GdMm0TUyqxl3BO9tl5OHU+lUt9m8cHI/RK1zfiy/UfpJ4uMh620+mSef4p1KZEoF9qvvvwb76c= 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=hNLxJlBN; arc=none smtp.client-ip=91.218.175.182 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="hNLxJlBN" 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=1784601670; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=a4FC3STKSoprfUgOEuBPG6f6DDrxaFv+uAG37y6XBGM=; b=hNLxJlBNoDTVc1qMF8mP0lgGBHKhnXso8eYIqZusWFahXw5ou2hp5KgSZLkfE3l9lm6Vi9 yuPecZTjChNcWrvfJOCI/aUfYsJvlh8wLNFDKNZty0sybCcxhbwZgP2Gx87vlW3pAkd+kj NZB+c2N1VKI25soyzH3eQOcgyv2ZDkc= From: Gang Yan To: mptcp@lists.linux.dev Cc: pabeni@redhat.com, Gang Yan Subject: [PATCH mptcp-next v2 0/7] mptcp: add bpf_setsockopt support Date: Tue, 21 Jul 2026 10:40:55 +0800 Message-ID: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT From: Gang Yan Changelog: v2: - Patches 1 and 2 are new in this series; they address TCP_MAXSEG handling in the bpf_setsockopt() path [1]. - Patch 4 adds an early return to fix msk->sk_rcvlowat being unexpectedly modified, an issue seen in v1. - Patch 5 makes the hook safe for the non-tcp master socket: it guards bpf_sock_ops_cb_flags_set() with sk_is_tcp() to prevent out-of-bounds heap reads/writes through tcp_sk(sk)->bpf_sock_ops_cb_flags, and does not set is_locked_tcp_sock for the msk (unlike tcp_call_bpf()). That flag authorizes the verifier's direct tcp_sock-offset field accesses; since the msk is not a tcp_sock, leaving it at the default 0 is safe. v1: Link: https://patchwork.kernel.org/project/mptcp/cover/20260713095735.1222033-1-gang.yan@linux.dev/ Gang Yan (7): mptcp: drop unused @max arg of __mptcp_setsockopt_set_val mptcp: take TCP_MAXSEG handling into __mptcp_setsockopt_set_val mptcp: use sockopt_lock/release_sock in sockopt mptcp: reject sockopt requiring ssks' lock in BPF context mptcp: enable bpf_setsockopt on the master socket mptcp: add TCP_CONNECT_CB sock_ops hook selftests: bpf: verify mptcp bpf_setsockopt from TCP_CONNECT_CB include/net/mptcp.h | 9 ++ net/core/filter.c | 10 ++ net/ipv4/tcp.c | 1 + net/mptcp/protocol.c | 6 + net/mptcp/protocol.h | 29 ++++ net/mptcp/sockopt.c | 149 +++++++++--------- .../testing/selftests/bpf/prog_tests/mptcp.c | 61 +++++++ .../selftests/bpf/progs/mptcp_setsockopt.c | 32 ++++ 8 files changed, 223 insertions(+), 74 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/mptcp_setsockopt.c -- 2.43.0