From nobody Mon Jun 8 05:28:35 2026 Received: from mail-m49198.qiye.163.com (mail-m49198.qiye.163.com [45.254.49.198]) (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 58DF22C029D; Tue, 2 Jun 2026 00:29:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.254.49.198 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780360196; cv=none; b=B83HSM45exuURUX3RGVSdG7q51HIwhllfC3MwEeCwWMwgL55IkRBqLbk3JfPFVF5d5kQXGB5a+6oXD3fZSxk3QroO5wVsCwHwSs0Pl5cgqZ9p4fRpNMhSQs4bbdTlU3i4G3YZ+rtUdpGnOD0/F4KYt6a3cG6/y3KQz3s5e0tpwc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780360196; c=relaxed/simple; bh=4Uwehhbo7B2anv5JiXyrOzwLm1Of00wQ3PUTHxPrC6E=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=MAEtdckxXzMrf5zeSZsIZddMQLfAFZH35YEBKUaNeZ44dTdNUvgM2GydL325UgLG2IHqUzjf6DB1FuwBpCppLx8WWj283S/VSXmhzp7Xjk8YY8ZKkicrPPb5Gps469yGDTdu5t8YihTnRgs1iXDg1BIFfn+HJW96VZelT7wvVss= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn; spf=pass smtp.mailfrom=seu.edu.cn; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b=emTMC40q; arc=none smtp.client-ip=45.254.49.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=seu.edu.cn Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=seu.edu.cn header.i=@seu.edu.cn header.b="emTMC40q" Received: from PC-202605011814.localdomain (unknown [223.112.146.162]) by smtp.qiye.163.com (Hmail) with ESMTP id 40a8c3caf; Tue, 2 Jun 2026 08:24:34 +0800 (GMT+08:00) From: Runyu Xiao To: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com Cc: dsahern@kernel.org, idosch@nvidia.com, edumazet@google.com, horms@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, jianhao.xu@seu.edu.cn, runyu.xiao@seu.edu.cn Subject: [PATCH net v2] ipv6: use READ_ONCE() for bindv6only default in inet6_create() Date: Tue, 2 Jun 2026 08:24:14 +0800 Message-Id: <20260602002414.1504106-1-runyu.xiao@seu.edu.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-HM-Tid: 0a9e85b7c62103a1kunmbd764a6114f2d5 X-HM-MType: 10 X-HM-Spam-Status: e1kfGhgUHx5ZQUpXWQgPGg8OCBgUHx5ZQUlOS1dZFg8aDwILHllBWSg2Ly tZV1koWUFITzdXWRgWCB1ZQUpXWS1ZQUlXWQ8JGhUIEh9ZQVlDSk0dVklNHh5MSk1MSR4ZSFYeHw 5VEwETFhoSFyQUDg9ZV1kYEgtZQVlJSUhVSkpJVUpPTVVKTUlZV1kWGg8SFR0UWUFZT0tIVUpLSU hOQ0NVSktLVUtZBg++ DKIM-Signature: a=rsa-sha256; b=emTMC40qEA0HJ8B8Gf8pqKy5PuDI0/P8loulVudkRSvIN7kyK7mr8dCVoQvfSBVgCKjOYBIlreXQpDpMbsrziurXjaUVtqix7JLtkPJb4+8F0NBV54udBHxP9CI/kN+JevSaklSTysFPDPNCi1upE0f/jnM4LfOPucOodyDR0Xk=; c=relaxed/relaxed; s=default; d=seu.edu.cn; v=1; bh=O0lEsgmG7jjp0S0PazzP2vtRhdGSUANPfEdz9qWrOFA=; h=date:mime-version:subject:message-id:from; Content-Type: text/plain; charset="utf-8" inet6_create() reads net->ipv6.sysctl.bindv6only locklessly. Use READ_ONCE() for this sysctl access. Signed-off-by: Runyu Xiao Reviewed-by: Ido Schimmel --- v2: - Shorten the commit message per review feedback - Drop the Fixes and stable CC trailers net/ipv6/af_inet6.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 0a88b376141d..79fc6ce6ff77 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -211,7 +211,7 @@ static int inet6_create(struct net *net, struct socket = *sock, int protocol, np->pmtudisc =3D IPV6_PMTUDISC_WANT; inet6_assign_bit(REPFLOW, sk, READ_ONCE(net->ipv6.sysctl.flowlabel_reflec= t) & FLOWLABEL_REFLECT_ESTABLISHED); - sk->sk_ipv6only =3D net->ipv6.sysctl.bindv6only; + sk->sk_ipv6only =3D READ_ONCE(net->ipv6.sysctl.bindv6only); sk->sk_txrehash =3D READ_ONCE(net->core.sysctl_txrehash); =20 /* Init the ipv4 part of the socket since we can have sockets --=20 2.34.1