From patchwork Thu Jun 1 23:38:59 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: 13264584 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 2ADD4C77B7A for ; Thu, 1 Jun 2023 23:39:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232093AbjFAXjH (ORCPT ); Thu, 1 Jun 2023 19:39:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41152 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229689AbjFAXjG (ORCPT ); Thu, 1 Jun 2023 19:39:06 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0892136 for ; Thu, 1 Jun 2023 16:39:04 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id d2e1a72fcca58-64d4e4598f0so1714967b3a.2 for ; Thu, 01 Jun 2023 16:39:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685662743; x=1688254743; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:from:to:cc:subject:date:message-id:reply-to; bh=whbmuO7ngTJhvFRPJg6Rdytc7gTUnaCIJab2ljA7PeA=; b=ZqIuGMtnkGRftcR+/I6ZkgR6bQcxnget/0FASDypH8zLYPMNtWDLKh+jTWSOUcDF6c z7UsA+vWtdKF1hWslP6VyXteZ80p6r7zY1+PvxvdNcKlZJ4WIdsFd/QWjbQu0z5gmLi7 Cvue4Qgmgtp7dTsN/KcLib/5KDYiweI8IqDeJLNzNjp8VAl+SChaop/Z+7nTbnQMgpkA LRxScWtSscw93W1WgAR/O0MVitamVHUpQr9T326A20h4Hv/ccdA6A1JrqTpJEQS/wMXz GZvU1DzajGYYalq8pCy/qA2cttnsp07MJ37dBuZl99aL1nrmRjbP4Dpsb2tnkTiL3MSw qwbw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685662743; x=1688254743; h=content-transfer-encoding:mime-version:message-id:date:subject:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=whbmuO7ngTJhvFRPJg6Rdytc7gTUnaCIJab2ljA7PeA=; b=lrM5MLRxT0oVVvOYvxx8qUGhoHoHVOHv0yUoenfFcDS9aoHa3RgRix3rBgU6QPdEQh 8CZXPQieh6PA5BQxsP5/At6wiRYIcqsbtXV3VdwmjSJrxnFs1eBgfRrevUE3RepSYTFz TPyyWKqIihkZ+LermtbTY8JVlPnMIVOCfkKnfwihX9ZG0dgduTe7Oo4tq0wo0KuFQn19 oo21UzGS2KeGcwE2w05XFboqjqr4kGNwgAKTGFBwosewGAlpYQ5A9TN8Rhs32cKHliII hBe1DPMJhFwO3fCKQ86HHr9JwG859V25lr6o+vxkvahDfoUYQq2sfAhz93hrffczwJXE 77Gg== X-Gm-Message-State: AC+VfDwj1klqn28Wy9PtkGjjOfOKw/oLZz9t7y5FwXTs0AGynbyZggon 5teTjpameIORQFWyNm8+xLMFcGzNlPw= X-Google-Smtp-Source: ACHHUZ5/GR+mCuAuv4ccvfDDRQ5g5z0BQfsuikD8b+VpWIjovi7FhXMN6PWK840yH8W4wAjvZp3D/Q== X-Received: by 2002:a05:6a00:c82:b0:649:dd0d:69d1 with SMTP id a2-20020a056a000c8200b00649dd0d69d1mr13312533pfv.31.1685662743457; Thu, 01 Jun 2023 16:39:03 -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 x25-20020aa79199000000b00652f5bd894esm78459pfa.177.2023.06.01.16.39.02 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jun 2023 16:39:02 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v2 1/3] Bluetooth: Consolidate code around sk_alloc into a helper function Date: Thu, 1 Jun 2023 16:38:59 -0700 Message-Id: <20230601233901.1448729-1-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org From: Luiz Augusto von Dentz This consolidates code around sk_alloc into bt_sock_alloc which does take care of common initialization. Signed-off-by: Luiz Augusto von Dentz --- include/net/bluetooth/bluetooth.h | 2 ++ net/bluetooth/af_bluetooth.c | 21 +++++++++++++++++++++ net/bluetooth/bnep/sock.c | 10 +--------- net/bluetooth/hci_sock.c | 10 ++-------- net/bluetooth/iso.c | 10 +--------- net/bluetooth/l2cap_sock.c | 10 +--------- net/bluetooth/rfcomm/sock.c | 13 +++---------- net/bluetooth/sco.c | 10 +--------- 8 files changed, 32 insertions(+), 54 deletions(-) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index 1b4230cd42a3..b518e5379045 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -400,6 +400,8 @@ int bt_sock_register(int proto, const struct net_proto_family *ops); void bt_sock_unregister(int proto); void bt_sock_link(struct bt_sock_list *l, struct sock *s); void bt_sock_unlink(struct bt_sock_list *l, struct sock *s); +struct sock *bt_sock_alloc(struct net *net, struct socket *sock, + struct proto *prot, int proto, gfp_t prio, int kern); int bt_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, int flags); int bt_sock_stream_recvmsg(struct socket *sock, struct msghdr *msg, diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 1c3c7ff5c3c6..6035422e13da 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -140,6 +140,27 @@ static int bt_sock_create(struct net *net, struct socket *sock, int proto, return err; } +struct sock *bt_sock_alloc(struct net *net, struct socket *sock, + struct proto *prot, int proto, gfp_t prio, int kern) +{ + struct sock *sk; + + sk = sk_alloc(net, PF_BLUETOOTH, prio, prot, kern); + if (!sk) + return NULL; + + sock_init_data(sock, sk); + INIT_LIST_HEAD(&bt_sk(sk)->accept_q); + + sock_reset_flag(sk, SOCK_ZAPPED); + + sk->sk_protocol = proto; + sk->sk_state = BT_OPEN; + + return sk; +} +EXPORT_SYMBOL(bt_sock_alloc); + void bt_sock_link(struct bt_sock_list *l, struct sock *sk) { write_lock(&l->lock); diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c index 57d509d77cb4..00d47bcf4d7d 100644 --- a/net/bluetooth/bnep/sock.c +++ b/net/bluetooth/bnep/sock.c @@ -205,21 +205,13 @@ static int bnep_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, &bnep_proto, kern); + sk = bt_sock_alloc(net, sock, &bnep_proto, protocol, GFP_ATOMIC, kern); if (!sk) return -ENOMEM; - sock_init_data(sock, sk); - sock->ops = &bnep_sock_ops; - sock->state = SS_UNCONNECTED; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = protocol; - sk->sk_state = BT_OPEN; - bt_sock_link(&bnep_sk_list, sk); return 0; } diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 1d249d839819..9c45586f5818 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -2143,18 +2143,12 @@ static int hci_sock_create(struct net *net, struct socket *sock, int protocol, sock->ops = &hci_sock_ops; - sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern); + sk = bt_sock_alloc(net, sock, &hci_sk_proto, protocol, GFP_ATOMIC, + kern); if (!sk) return -ENOMEM; - sock_init_data(sock, sk); - - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = protocol; - sock->state = SS_UNCONNECTED; - sk->sk_state = BT_OPEN; sk->sk_destruct = hci_sock_destruct; bt_sock_link(&hci_sk_list, sk); diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index 485348fcc030..9c9f3f704c7f 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -739,21 +739,13 @@ static struct sock *iso_sock_alloc(struct net *net, struct socket *sock, { struct sock *sk; - sk = sk_alloc(net, PF_BLUETOOTH, prio, &iso_proto, kern); + sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern); if (!sk) return NULL; - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - sk->sk_destruct = iso_sock_destruct; sk->sk_sndtimeo = ISO_CONN_TIMEOUT; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - /* Set address type as public as default src address is BDADDR_ANY */ iso_pi(sk)->src_type = BDADDR_LE_PUBLIC; diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 947ca580bb9a..9ef936f27a6a 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -1858,21 +1858,13 @@ static struct sock *l2cap_sock_alloc(struct net *net, struct socket *sock, struct sock *sk; struct l2cap_chan *chan; - sk = sk_alloc(net, PF_BLUETOOTH, prio, &l2cap_proto, kern); + sk = bt_sock_alloc(net, sock, &l2cap_proto, proto, prio, kern); if (!sk) return NULL; - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - sk->sk_destruct = l2cap_sock_destruct; sk->sk_sndtimeo = L2CAP_CONN_TIMEOUT; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - chan = l2cap_chan_create(); if (!chan) { sk_free(sk); diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 4397e14ff560..b54e8a530f55 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -268,18 +268,16 @@ static struct proto rfcomm_proto = { .obj_size = sizeof(struct rfcomm_pinfo) }; -static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio, int kern) +static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, + int proto, gfp_t prio, int kern) { struct rfcomm_dlc *d; struct sock *sk; - sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto, kern); + sk = bt_sock_alloc(net, sock, &rfcomm_proto, proto, prio, kern); if (!sk) return NULL; - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - d = rfcomm_dlc_alloc(prio); if (!d) { sk_free(sk); @@ -298,11 +296,6 @@ static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - bt_sock_link(&rfcomm_sk_list, sk); BT_DBG("sk %p", sk); diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index cd1a27ac555d..bbf7072f5e80 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -503,21 +503,13 @@ static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, { struct sock *sk; - sk = sk_alloc(net, PF_BLUETOOTH, prio, &sco_proto, kern); + sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern); if (!sk) return NULL; - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - sk->sk_destruct = sco_sock_destruct; sk->sk_sndtimeo = SCO_CONN_TIMEOUT; - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT; sco_pi(sk)->codec.id = BT_CODEC_CVSD; sco_pi(sk)->codec.cid = 0xffff; From patchwork Thu Jun 1 23:39:00 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: 13264585 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 A423FC7EE23 for ; Thu, 1 Jun 2023 23:39:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232343AbjFAXjJ (ORCPT ); Thu, 1 Jun 2023 19:39:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229689AbjFAXjI (ORCPT ); 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(c-71-59-129-171.hsd1.or.comcast.net. [71.59.129.171]) by smtp.gmail.com with ESMTPSA id x25-20020aa79199000000b00652f5bd894esm78459pfa.177.2023.06.01.16.39.03 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jun 2023 16:39:04 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v2 2/3] Bluetooth: Init sk_peer_* on bt_sock_alloc Date: Thu, 1 Jun 2023 16:39:00 -0700 Message-Id: <20230601233901.1448729-2-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230601233901.1448729-1-luiz.dentz@gmail.com> References: <20230601233901.1448729-1-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 | 14 ++++++++++++++ net/bluetooth/hidp/sock.c | 10 +--------- net/bluetooth/l2cap_sock.c | 19 ------------------- 3 files changed, 15 insertions(+), 28 deletions(-) diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 6035422e13da..eae346045a23 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); @@ -191,6 +199,12 @@ 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. + */ + sk->sk_peer_pid = parent->sk_peer_pid; + sk->sk_peer_cred = parent->sk_peer_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; From patchwork Thu Jun 1 23:39:01 2023 Content-Type: text/plain; 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(c-71-59-129-171.hsd1.or.comcast.net. [71.59.129.171]) by smtp.gmail.com with ESMTPSA id x25-20020aa79199000000b00652f5bd894esm78459pfa.177.2023.06.01.16.39.05 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jun 2023 16:39:05 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v2 3/3] Bluetooth: hci_sock: Forward credentials to monitor Date: Thu, 1 Jun 2023 16:39:01 -0700 Message-Id: <20230601233901.1448729-3-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230601233901.1448729-1-luiz.dentz@gmail.com> References: <20230601233901.1448729-1-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 stores scm_creds into hci_skb_cb so they can be properly forwarded to the likes of btmon which is then able to print information about the process who is originating the traffic: bluetoothd[35]: @ MGMT Command: Rea.. (0x0001) plen 0 {0x0001} @ MGMT Event: Command Complete (0x0001) plen 6 {0x0001} Read Management Version Information (0x0001) plen 3 bluetoothd[35]: < ACL Data T.. flags 0x00 dlen 41 ATT: Write Command (0x52) len 36 Handle: 0x0043 Type: ASE Control Point (0x2bc6) Data: 020203000110270000022800020a00409c0001000110270000022800020a00409c00 Opcode: QoS Configuration (0x02) Number of ASE(s): 2 ASE: #0 ASE ID: 0x03 CIG ID: 0x00 CIS ID: 0x01 SDU Interval: 10000 usec Framing: Unframed (0x00) PHY: 0x02 LE 2M PHY (0x02) Max SDU: 40 RTN: 2 Max Transport Latency: 10 Presentation Delay: 40000 us ASE: #1 ASE ID: 0x01 CIG ID: 0x00 CIS ID: 0x01 SDU Interval: 10000 usec Framing: Unframed (0x00) PHY: 0x02 LE 2M PHY (0x02) Max SDU: 40 RTN: 2 Max Transport Latency: 10 Presentation Delay: 40000 us Signed-off-by: Luiz Augusto von Dentz --- include/net/bluetooth/bluetooth.h | 1 + net/bluetooth/hci_sock.c | 67 ++++++++++++++++++++++++++++++- 2 files changed, 66 insertions(+), 2 deletions(-) diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h index b518e5379045..310231e47b3d 100644 --- a/include/net/bluetooth/bluetooth.h +++ b/include/net/bluetooth/bluetooth.h @@ -471,6 +471,7 @@ struct bt_skb_cb { struct sco_ctrl sco; struct hci_ctrl hci; struct mgmt_ctrl mgmt; + struct scm_creds creds; }; }; #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb)) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 9c45586f5818..5e4f718073b7 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -264,6 +264,53 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb) kfree_skb(skb_copy); } +static void hci_sock_copy_creds(struct sock *sk, struct sk_buff *skb) +{ + struct scm_creds *creds; + + if (!sk || WARN_ON(!skb)) + return; + + creds = &bt_cb(skb)->creds; + + /* Check if peer credentials is set */ + if (!sk->sk_peer_pid) { + /* Check if parent peer credentials is set */ + if (bt_sk(sk)->parent && bt_sk(sk)->parent->sk_peer_pid) + sk = bt_sk(sk)->parent; + else + return; + } + + /* Check if scm_creds already set */ + if (creds->pid == pid_vnr(sk->sk_peer_pid)) + return; + + memset(creds, 0, sizeof(*creds)); + + creds->pid = pid_vnr(sk->sk_peer_pid); + if (sk->sk_peer_cred) { + creds->uid = sk->sk_peer_cred->uid; + creds->gid = sk->sk_peer_cred->gid; + } +} + +static struct sk_buff *hci_skb_clone(struct sk_buff *skb) +{ + struct sk_buff *nskb; + + if (!skb) + return NULL; + + nskb = skb_clone(skb, GFP_ATOMIC); + if (!nskb) + return NULL; + + hci_sock_copy_creds(skb->sk, nskb); + + return nskb; +} + /* Send frame to sockets with specific channel */ static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb, int flag, struct sock *skip_sk) @@ -289,7 +336,7 @@ static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb, if (hci_pi(sk)->channel != channel) continue; - nskb = skb_clone(skb, GFP_ATOMIC); + nskb = hci_skb_clone(skb); if (!nskb) continue; @@ -356,6 +403,8 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb) if (!skb_copy) return; + hci_sock_copy_creds(skb->sk, skb_copy); + /* Put header before the data */ hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE); hdr->opcode = opcode; @@ -531,10 +580,12 @@ static struct sk_buff *create_monitor_ctrl_open(struct sock *sk) return NULL; } - skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC); + skb = bt_skb_alloc(14 + TASK_COMM_LEN, GFP_ATOMIC); if (!skb) return NULL; + hci_sock_copy_creds(sk, skb); + flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0; put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); @@ -580,6 +631,8 @@ static struct sk_buff *create_monitor_ctrl_close(struct sock *sk) if (!skb) return NULL; + hci_sock_copy_creds(sk, skb); + put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); __net_timestamp(skb); @@ -606,6 +659,8 @@ static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index, if (!skb) return NULL; + hci_sock_copy_creds(sk, skb); + put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4)); put_unaligned_le16(opcode, skb_put(skb, 2)); @@ -638,6 +693,8 @@ send_monitor_note(struct sock *sk, const char *fmt, ...) if (!skb) return; + hci_sock_copy_creds(sk, skb); + va_start(args, fmt); vsprintf(skb_put(skb, len), fmt, args); *(u8 *)skb_put(skb, 1) = 0; @@ -1494,6 +1551,7 @@ static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, int flags) { + struct scm_cookie scm; struct sock *sk = sock->sk; struct sk_buff *skb; int copied, err; @@ -1538,11 +1596,16 @@ static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, break; } + memset(&scm, 0, sizeof(scm)); + scm.creds = bt_cb(skb)->creds; + skb_free_datagram(sk, skb); if (flags & MSG_TRUNC) copied = skblen; + scm_recv(sock, msg, &scm, flags); + return err ? : copied; }