From patchwork Sat Jun 3 00:16:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luiz Augusto von Dentz X-Patchwork-Id: 13265971 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 68052C7EE2C for ; Sat, 3 Jun 2023 00:16:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236881AbjFCAQh (ORCPT ); Fri, 2 Jun 2023 20:16:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236563AbjFCAQe (ORCPT ); Fri, 2 Jun 2023 20:16:34 -0400 Received: from mail-il1-x12f.google.com (mail-il1-x12f.google.com [IPv6:2607:f8b0:4864:20::12f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69517E43 for ; Fri, 2 Jun 2023 17:16:33 -0700 (PDT) Received: by mail-il1-x12f.google.com with SMTP id e9e14a558f8ab-33d22754450so9865735ab.0 for ; Fri, 02 Jun 2023 17:16:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685751392; x=1688343392; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=H2h5Uz9y2Au1IFITBAReRPzwRwVGLLKM+YfA341gnQI=; b=sI2VzeTpr6Juposfy3AJ00NwXaQ+OJeAU4YyTdJBoUKHbSezvFUDnflpq9vEuueflX o0HLpJzTAA1XU9J5KyE9qsD7kzRzk7NYo2XoJyYwQp90ZuXvP+j3Q8PdtpQCRts5446b KHJMLfjNM5KiktaIs2+I8l5rWeu1JcZCHppiTlwKn7tL29YDa24EmDNt5GJrlLu3NN33 gbAZZqa91JmHaSGpoJVO0r/atdkYiarbH6b3muDwjbvAFbRWSfOygPJje0+j5KrxEdYM 5qoYuSV8zQhLXMeIA5iiyD7sIVL7I+GxsxljUnY4VYZIGCEOiKw57WFNXRRREJaCVRwr VTbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685751392; x=1688343392; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=H2h5Uz9y2Au1IFITBAReRPzwRwVGLLKM+YfA341gnQI=; b=e+zvb0vdI2lG++WgIjmDxZm/L5vHTVPZ7cYW5Z0DmwzMrvBWLfzXYWMhNeGXmtK8Nl suHccihmFb9rXQ6bulHtBhCAK4MPjmLPnlQdhP0n5Ina1k6o7ZSsmRMwJaQGw8Hixomt YRqydBMBElnJSIvhQfaqZv/1dQDcUiSoOyTOQMj0AvGjUU+N2cdMA+th3Vq0wzTSS5g3 AnqtG8yj2n8g5RGuQRd69o1suesAumqE+lS/Mr/z3Pom0W74+6liXthB8LStliAj8H4z c02GKCJUm7MGeuVQpNqXYWaXUjKYoG8LTVjWMLZlD253aX189IWyhXvsHbMBpdzEk7Id wPSQ== X-Gm-Message-State: AC+VfDyDDaA0DGHf3QPHyQwEG21SjKTwgEtRjRRQ7unHcpmo9tJNOnkP twPa8xXg3BylRL7KOL3dBgSiBU5SRZQ= X-Google-Smtp-Source: ACHHUZ7fyOICW1ahs6yT1GAdEH06YPBvsS0AkKKLvDarZaipzZALX5Tdm0bnaqno8j/wMVm9p+vdtg== X-Received: by 2002:a92:d34a:0:b0:33b:5fb3:6070 with SMTP id a10-20020a92d34a000000b0033b5fb36070mr10836713ilh.5.1685751391734; Fri, 02 Jun 2023 17:16:31 -0700 (PDT) Received: from lvondent-mobl4.. (c-71-59-129-171.hsd1.or.comcast.net. [71.59.129.171]) by smtp.gmail.com with ESMTPSA id c19-20020aa78e13000000b0064fde7ae1ffsm1496267pfr.38.2023.06.02.17.16.30 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Jun 2023 17:16:31 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v3 2/3] Bluetooth: Init sk_peer_* on bt_sock_alloc Date: Fri, 2 Jun 2023 17:16:27 -0700 Message-Id: <20230603001628.1886596-2-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230603001628.1886596-1-luiz.dentz@gmail.com> References: <20230603001628.1886596-1-luiz.dentz@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz This makes sure peer information is always available via sock when using bt_sock_alloc. Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/af_bluetooth.c | 24 ++++++++++++++++++++++++ net/bluetooth/hidp/sock.c | 10 +--------- net/bluetooth/l2cap_sock.c | 19 ------------------- 3 files changed, 25 insertions(+), 28 deletions(-) diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 6035422e13da..647afb187147 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -157,6 +157,14 @@ struct sock *bt_sock_alloc(struct net *net, struct socket *sock, sk->sk_protocol = proto; sk->sk_state = BT_OPEN; + /* Init peer information so it can be properly monitored */ + if (!kern) { + spin_lock(&sk->sk_peer_lock); + sk->sk_peer_pid = get_pid(task_tgid(current)); + sk->sk_peer_cred = get_current_cred(); + spin_unlock(&sk->sk_peer_lock); + } + return sk; } EXPORT_SYMBOL(bt_sock_alloc); @@ -179,6 +187,9 @@ EXPORT_SYMBOL(bt_sock_unlink); void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh) { + const struct cred *old_cred; + struct pid *old_pid; + BT_DBG("parent %p, sk %p", parent, sk); sock_hold(sk); @@ -191,6 +202,19 @@ void bt_accept_enqueue(struct sock *parent, struct sock *sk, bool bh) list_add_tail(&bt_sk(sk)->accept_q, &bt_sk(parent)->accept_q); bt_sk(sk)->parent = parent; + /* Copy credentials from parent since for incoming connections the + * socket is allocated by the kernel. + */ + spin_lock(&sk->sk_peer_lock); + old_pid = sk->sk_peer_pid; + old_cred = sk->sk_peer_cred; + sk->sk_peer_pid = get_pid(parent->sk_peer_pid); + sk->sk_peer_cred = get_cred(parent->sk_peer_cred); + spin_unlock(&sk->sk_peer_lock); + + put_pid(old_pid); + put_cred(old_cred); + if (bh) bh_unlock_sock(sk); else diff --git a/net/bluetooth/hidp/sock.c b/net/bluetooth/hidp/sock.c index 369ed92dac99..c93aaeb3a3fa 100644 --- a/net/bluetooth/hidp/sock.c +++ b/net/bluetooth/hidp/sock.c @@ -256,21 +256,13 @@ static int hidp_sock_create(struct net *net, struct socket *sock, int protocol, if (sock->type != SOCK_RAW) return -ESOCKTNOSUPPORT; - sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hidp_proto, kern); + sk = bt_sock_alloc(net, sock, &hidp_proto, protocol, GFP_ATOMIC, kern); if (!sk) return -ENOMEM; - sock_init_data(sock, sk); - sock->ops = &hidp_sock_ops; - sock->state = SS_UNCONNECTED; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = protocol; - sk->sk_state = BT_OPEN; - bt_sock_link(&hidp_sk_list, sk); return 0; diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 9ef936f27a6a..3bdfc3f1e73d 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -178,21 +178,6 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) return err; } -static void l2cap_sock_init_pid(struct sock *sk) -{ - struct l2cap_chan *chan = l2cap_pi(sk)->chan; - - /* Only L2CAP_MODE_EXT_FLOWCTL ever need to access the PID in order to - * group the channels being requested. - */ - if (chan->mode != L2CAP_MODE_EXT_FLOWCTL) - return; - - spin_lock(&sk->sk_peer_lock); - sk->sk_peer_pid = get_pid(task_tgid(current)); - spin_unlock(&sk->sk_peer_lock); -} - static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) { @@ -268,8 +253,6 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, chan->mode != L2CAP_MODE_EXT_FLOWCTL) chan->mode = L2CAP_MODE_LE_FLOWCTL; - l2cap_sock_init_pid(sk); - err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), &la.l2_bdaddr, la.l2_bdaddr_type); if (err) @@ -325,8 +308,6 @@ static int l2cap_sock_listen(struct socket *sock, int backlog) goto done; } - l2cap_sock_init_pid(sk); - sk->sk_max_ack_backlog = backlog; sk->sk_ack_backlog = 0;