From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A5B9864AB3; Tue, 23 Jan 2024 01:57:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705975049; cv=none; b=H2P0MXyVzloTTAIOfXr8GVnYO9C6BaW9s7vELQVUWNJeMsnI7O+9GFfGCKTu57CPLfZZ8nMGlYKTHjZjwzLQMqsTj1l46yUKtqRtElrQL6uHpLk8arlpyVFMjODICTdjQC6VLrnQn+b8te7b2DU/s8qmny6yErKXcxTugA30SN0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705975049; c=relaxed/simple; bh=eqpFdUvn4p2IzkXJ8MPBt9ubVMwpAQ3Fsygaugz75jg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GczgsTbJ8VDiSJzuHat26onPi0t4QuvLLPqsaw82L25j6T7hmmz3qu4Umr8c7Y90Qaje/yvUO1YI7OkZzQ2Hxs/BNljS93beDbPdxbGRCx/AxHHSI7zD8I7u4K7YCyn2Si8iZjH6iELyEqWR4hdnQ6zYX5npQn2BRZMtrpLTYhE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=IOkbVK28; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="IOkbVK28" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4E03FC433C7; Tue, 23 Jan 2024 01:57:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1705975049; bh=eqpFdUvn4p2IzkXJ8MPBt9ubVMwpAQ3Fsygaugz75jg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IOkbVK28N8Y8JG81y/EqiYPRPanwMF4Z0A4eXOsxySaDDiG6h3UTnWLTzAHZutvza e5nY3/n2BNp97tYrHGSNruXDB6hutNXq3+G1xcIBErVAX4ZlcCVqkwDzOKF1ghq0zM gekv2207jeUzzPvws6NDc3dJtti71rmYv9trRYNo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Eric Dumazet , Marcelo Ricardo Leitner , Willem de Bruijn , Xin Long , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.6 213/583] sctp: support MSG_ERRQUEUE flag in recvmsg() Date: Mon, 22 Jan 2024 15:54:24 -0800 Message-ID: <20240122235818.530586721@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240122235812.238724226@linuxfoundation.org> References: <20240122235812.238724226@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric Dumazet [ Upstream commit 4746b36b1abe11ca32987b2d21e1e770deab17cc ] For some reason sctp_poll() generates EPOLLERR if sk->sk_error_queue is not empty but recvmsg() can not drain the error queue yet. This is needed to better support timestamping. I had to export inet_recv_error(), since sctp can be compiled as a module. Signed-off-by: Eric Dumazet Cc: Marcelo Ricardo Leitner Cc: Willem de Bruijn Acked-by: Xin Long Link: https://lore.kernel.org/r/20231212145550.3872051-1-edumazet@google.com Signed-off-by: Jakub Kicinski Stable-dep-of: a562c0a2d651 ("sctp: fix busy polling") Signed-off-by: Sasha Levin --- net/ipv4/af_inet.c | 1 + net/sctp/socket.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 2713c9b06c4c..b0a5de1303b5 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -1632,6 +1632,7 @@ int inet_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) #endif return -EINVAL; } +EXPORT_SYMBOL(inet_recv_error); int inet_gro_complete(struct sk_buff *skb, int nhoff) { diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 7f89e43154c0..5fb02bbb4b34 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -2099,6 +2099,9 @@ static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, pr_debug("%s: sk:%p, msghdr:%p, len:%zd, flags:0x%x, addr_len:%p)\n", __func__, sk, msg, len, flags, addr_len); + if (unlikely(flags & MSG_ERRQUEUE)) + return inet_recv_error(sk, msg, len, addr_len); + lock_sock(sk); if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) && -- 2.43.0