From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-177.mta0.migadu.com (out-177.mta0.migadu.com [91.218.175.177]) (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 C92032652AF for ; Sat, 13 Jun 2026 16:25:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.177 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781367919; cv=none; b=bsenas+AliW5SNMU1qRholgbY4cOFD19OO8QcCk/Y1BbC69ohz78GHGLQMwYrYw6vuCmDyjgdQvqhqnkoNCA+YMTFf85RxnQJvlVs851TRAVPVsYeFErtPp1MzYftIyzhr913JetxgBCNMSwkIN2wNaU9P7zIkjWpzZa0IAYJkU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781367919; c=relaxed/simple; bh=Eal2czQ95OzT7W6wIkz0a5NNDrThTK5VqMCa1pr5ZC4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cBSN6KlFz4zy/+ParTogTVRsKu3YdIlEvLkn/9AbFOAIakoCwAeulZMRCR0Npd0zUylzzoHCY7k4n8/mK3HL91SW55tPMWdAhc9qgYVrs7mT3NCHfIOtdwua73vSt90rPPgo+/MMzeLT+e8R/kiNDRm9o4yRfojW/q8to+ggXVU= 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=v65xRIoT; arc=none smtp.client-ip=91.218.175.177 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="v65xRIoT" 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=1781367914; 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: in-reply-to:in-reply-to:references:references; bh=B8tNNOKX9vfVW0agW6GrP6/656hRhnEOUOOBtzzI4Vk=; b=v65xRIoTDffq84H+qFuzsYjKkb5yJ2o2dSOm5M9Nzop343f3yvyHeL7X1rUSy4i841CgNa fqodtywTbu4Ibxv6bXrsWrdA5X1sSWodtrMrf2DUdzd/ptqSPkYDUN1vYfI2GsVReOfjYz HYTk9I/BG3rXCqchxpqB4g30VFM3kII= From: Leon Hwang To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Martin KaFai Lau , Song Liu , Yonghong Song , Jiri Olsa , Emil Tsalapatis , John Fastabend , Stanislav Fomichev , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan , Leon Hwang , Ihor Solodrai , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-patches-bot@fb.com, Feng Zhou Subject: [PATCH bpf-next v4 1/2] bpf: Fix bpf_get/setsockopt to tos for ipv4-mapped ipv6 socket Date: Sun, 14 Jun 2026 00:24:42 +0800 Message-ID: <20260613162443.60515-2-leon.hwang@linux.dev> In-Reply-To: <20260613162443.60515-1-leon.hwang@linux.dev> References: <20260613162443.60515-1-leon.hwang@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 When TCP over IPv4 via INET6 API, bpf_get/setsockopt with ipv4 will fail, because sk->sk_family is AF_INET6. With ipv6 will success, not take effect, because inet_csk(sk)->icsk_af_ops is ipv6_mapped and use ip_queue_xmit, inet_sk(sk)->tos. To relax this restriction, allow getting/setting tos for those possible ipv4-mapped ipv6 sockets. Fixes: ee7f1e1302f5 ("bpf: Change bpf_setsockopt(SOL_IP) to reuse do_ip_setsockopt()") Signed-off-by: Feng Zhou Signed-off-by: Leon Hwang --- net/core/filter.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/net/core/filter.c b/net/core/filter.c index 9590877b0714..57b00c6cc8cc 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -5544,11 +5544,24 @@ static int sol_tcp_sockopt(struct sock *sk, int optname, KERNEL_SOCKPTR(optval), *optlen); } +static bool sk_allows_sol_ip_sockopt(struct sock *sk) +{ + switch (sk->sk_family) { + case AF_INET: + return true; + case AF_INET6: + /* Allow getting/setting sockopt for possible ipv4-mapped ipv6 socket. */ + return sk->sk_type != SOCK_RAW && !ipv6_only_sock(sk); + default: + return false; + } +} + static int sol_ip_sockopt(struct sock *sk, int optname, char *optval, int *optlen, bool getopt) { - if (sk->sk_family != AF_INET) + if (!sk_allows_sol_ip_sockopt(sk)) return -EINVAL; switch (optname) { -- 2.54.0