From patchwork Thu Sep 16 18:03:33 2021 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: 513158 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D4E6C433EF for ; Thu, 16 Sep 2021 18:55:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 419016120D for ; Thu, 16 Sep 2021 18:55:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243007AbhIPS4i (ORCPT ); Thu, 16 Sep 2021 14:56:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51622 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344097AbhIPS4e (ORCPT ); Thu, 16 Sep 2021 14:56:34 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D0A8C043086 for ; Thu, 16 Sep 2021 11:03:38 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id w6so4407117pll.3 for ; Thu, 16 Sep 2021 11:03:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=k4gR0pPu0xOReVDwAtsZ+nxyihqWjwSFDCMtWjEg7aM=; b=AFCexTFYRbPJsvaCUzYZuJ34m8aXYCmQI5NWDkuZGZtrWkCd5JzkbIi63KVSbV+PfS z5sP/lk3qLd6dYssir1AlZBbuTiHf4rXUnHOOP5dvlzcTmG1AjNr0dcDqxF3D+7InlCc CPBM2ooqwS+LcbGGwa1hebGStxixDEch+Uh2qbbl8cKbzlNvyZWblyoI7XVn8m3G/8f9 SArbACDOsPXQvejKkhx04HMed76XsfQHw0DQLPEeCFGxtjty8UQAk+csNAjf4Up5+W09 vhOcbpkSC+jikkEdQpY6R8KfoNv1v6OTTKyO6x+coDCtFjx6BgRxjYOT7/FOFvYg6AoY BBvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=k4gR0pPu0xOReVDwAtsZ+nxyihqWjwSFDCMtWjEg7aM=; b=bcnrejBCgCa6wjiOxXqJlq+6no8Nr6SIRq1MFs60d5xorAElK/Bs9uzJH0xN1Yt0+b TQ8oDMxmmIq2ToOQ6vDxKEKtusYM3DAb+XAl8VyL0I72uxIH2hWiUOh3JVoi7L1B5+en F84K9alutcLmxYHtKuBBPt/uNTW6dDTXdLr5Pge1fA+TVPSbnY7uNZPY64TIkSJX1hsh J9WpnughlYU98a/HNoGb+bw+vtdT3Mib1wkbfpw3ximISSbwII1jzaHiJZ9IR2e7fhxo 1+vlGRxsmwac6wPq1nFQrWrO0UfJjmBXLvwHS3cw9g9Z3T/ImKeQ3ZjFaNTkzevp7qCt I9pA== X-Gm-Message-State: AOAM531QeNOonHOr8/7ob7l7rAmVRYmYJmm3e34nIwKSBTCSprrFpbOf NbLvl6Zac1YN4x80mYEfhTE++2oCSIk= X-Google-Smtp-Source: ABdhPJwPetX3QTYmT6/GKAv0tynVAEgGVTEbZyyLVghr8UzRDbl22GPcn/ZJ60kSyMyTVNig/yxEGQ== X-Received: by 2002:a17:90a:cf0d:: with SMTP id h13mr7412060pju.61.1631815417145; Thu, 16 Sep 2021 11:03:37 -0700 (PDT) Received: from lvondent-mobl4.intel.com (c-71-56-157-77.hsd1.or.comcast.net. [71.56.157.77]) by smtp.gmail.com with ESMTPSA id p24sm3580432pfh.136.2021.09.16.11.03.36 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Sep 2021 11:03:36 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v5 2/4] Bluetooth: hci_sock: Replace use of memcpy_from_msg with bt_skb_sendmsg Date: Thu, 16 Sep 2021 11:03:33 -0700 Message-Id: <20210916180335.75976-2-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210916180335.75976-1-luiz.dentz@gmail.com> References: <20210916180335.75976-1-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 use of bt_skb_sendmsg instead of allocating a different buffer to be used with memcpy_from_msg which cause one extra copy. Tested-by: Tedd Ho-Jeong An Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/hci_sock.c | 100 +++++++++++++++------------------------ 1 file changed, 37 insertions(+), 63 deletions(-) diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c index 091e819ba40e..c0a237aa4baf 100644 --- a/net/bluetooth/hci_sock.c +++ b/net/bluetooth/hci_sock.c @@ -1510,7 +1510,8 @@ static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg, return err ? : copied; } -static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, void *buf, size_t msglen) +static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, + struct sk_buff *skb) { u8 *cp; struct mgmt_hdr *hdr; @@ -1520,31 +1521,31 @@ static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, void *buf, bool var_len, no_hdev; int err; - BT_DBG("got %zu bytes", msglen); + BT_DBG("got %d bytes", skb->len); - if (msglen < sizeof(*hdr)) + if (skb->len < sizeof(*hdr)) return -EINVAL; - hdr = buf; + hdr = (void *)skb->data; opcode = __le16_to_cpu(hdr->opcode); index = __le16_to_cpu(hdr->index); len = __le16_to_cpu(hdr->len); - if (len != msglen - sizeof(*hdr)) { + if (len != skb->len - sizeof(*hdr)) { err = -EINVAL; goto done; } if (chan->channel == HCI_CHANNEL_CONTROL) { - struct sk_buff *skb; + struct sk_buff *cmd; /* Send event to monitor */ - skb = create_monitor_ctrl_command(sk, index, opcode, len, - buf + sizeof(*hdr)); - if (skb) { - hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, + cmd = create_monitor_ctrl_command(sk, index, opcode, len, + skb->data + sizeof(*hdr)); + if (cmd) { + hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd, HCI_SOCK_TRUSTED, NULL); - kfree_skb(skb); + kfree_skb(cmd); } } @@ -1609,13 +1610,13 @@ static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, void *buf, if (hdev && chan->hdev_init) chan->hdev_init(sk, hdev); - cp = buf + sizeof(*hdr); + cp = skb->data + sizeof(*hdr); err = handler->func(sk, hdev, cp, len); if (err < 0) goto done; - err = msglen; + err = skb->len; done: if (hdev) @@ -1624,10 +1625,10 @@ static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk, void *buf, return err; } -static int hci_logging_frame(struct sock *sk, void *buf, int len, unsigned int flags) +static int hci_logging_frame(struct sock *sk, struct sk_buff *skb, + unsigned int flags) { struct hci_mon_hdr *hdr; - struct sk_buff *skb; struct hci_dev *hdev; u16 index; int err; @@ -1636,21 +1637,13 @@ static int hci_logging_frame(struct sock *sk, void *buf, int len, unsigned int f * the priority byte, the ident length byte and at least one string * terminator NUL byte. Anything shorter are invalid packets. */ - if (len < sizeof(*hdr) + 3) + if (skb->len < sizeof(*hdr) + 3) return -EINVAL; - skb = bt_skb_send_alloc(sk, len, flags & MSG_DONTWAIT, &err); - if (!skb) - return err; - - memcpy(skb_put(skb, len), buf, len); - hdr = (void *)skb->data; - if (__le16_to_cpu(hdr->len) != len - sizeof(*hdr)) { - err = -EINVAL; - goto drop; - } + if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr)) + return -EINVAL; if (__le16_to_cpu(hdr->opcode) == 0x0000) { __u8 priority = skb->data[sizeof(*hdr)]; @@ -1669,25 +1662,20 @@ static int hci_logging_frame(struct sock *sk, void *buf, int len, unsigned int f * The message follows the ident string (if present) and * must be NUL terminated. Otherwise it is not a valid packet. */ - if (priority > 7 || skb->data[len - 1] != 0x00 || - ident_len > len - sizeof(*hdr) - 3 || - skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) { - err = -EINVAL; - goto drop; - } + if (priority > 7 || skb->data[skb->len - 1] != 0x00 || + ident_len > skb->len - sizeof(*hdr) - 3 || + skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) + return -EINVAL; } else { - err = -EINVAL; - goto drop; + return -EINVAL; } index = __le16_to_cpu(hdr->index); if (index != MGMT_INDEX_NONE) { hdev = hci_dev_get(index); - if (!hdev) { - err = -ENODEV; - goto drop; - } + if (!hdev) + return -ENODEV; } else { hdev = NULL; } @@ -1695,13 +1683,11 @@ static int hci_logging_frame(struct sock *sk, void *buf, int len, unsigned int f hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING); hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL); - err = len; + err = skb->len; if (hdev) hci_dev_put(hdev); -drop: - kfree_skb(skb); return err; } @@ -1713,7 +1699,6 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, struct hci_dev *hdev; struct sk_buff *skb; int err; - void *buf; const unsigned int flags = msg->msg_flags; BT_DBG("sock %p sk %p", sock, sk); @@ -1727,13 +1712,9 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, if (len < 4 || len > hci_pi(sk)->mtu) return -EINVAL; - buf = kmalloc(len, GFP_KERNEL); - if (!buf) - return -ENOMEM; - if (memcpy_from_msg(buf, msg, len)) { - kfree(buf); - return -EFAULT; - } + skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0); + if (IS_ERR(skb)) + return PTR_ERR(skb); lock_sock(sk); @@ -1743,39 +1724,33 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, break; case HCI_CHANNEL_MONITOR: err = -EOPNOTSUPP; - goto done; + goto drop; case HCI_CHANNEL_LOGGING: - err = hci_logging_frame(sk, buf, len, flags); - goto done; + err = hci_logging_frame(sk, skb, flags); + goto drop; default: mutex_lock(&mgmt_chan_list_lock); chan = __hci_mgmt_chan_find(hci_pi(sk)->channel); if (chan) - err = hci_mgmt_cmd(chan, sk, buf, len); + err = hci_mgmt_cmd(chan, sk, skb); else err = -EINVAL; mutex_unlock(&mgmt_chan_list_lock); - goto done; + goto drop; } hdev = hci_hdev_from_sock(sk); if (IS_ERR(hdev)) { err = PTR_ERR(hdev); - goto done; + goto drop; } if (!test_bit(HCI_UP, &hdev->flags)) { err = -ENETDOWN; - goto done; + goto drop; } - skb = bt_skb_send_alloc(sk, len, flags & MSG_DONTWAIT, &err); - if (!skb) - goto done; - - memcpy(skb_put(skb, len), buf, len); - hci_skb_pkt_type(skb) = skb->data[0]; skb_pull(skb, 1); @@ -1846,7 +1821,6 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg, done: release_sock(sk); - kfree(buf); return err; drop: From patchwork Thu Sep 16 18:03:35 2021 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: 513157 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 543FBC433EF for ; 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[71.56.157.77]) by smtp.gmail.com with ESMTPSA id p24sm3580432pfh.136.2021.09.16.11.03.37 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Sep 2021 11:03:38 -0700 (PDT) From: Luiz Augusto von Dentz To: linux-bluetooth@vger.kernel.org Subject: [PATCH v5 4/4] Bluetooth: SCO: Fix sco_send_frame returning skb->len Date: Thu, 16 Sep 2021 11:03:35 -0700 Message-Id: <20210916180335.75976-4-luiz.dentz@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210916180335.75976-1-luiz.dentz@gmail.com> References: <20210916180335.75976-1-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 The skb in modified by hci_send_sco which pushes SCO headers thus changing skb->len causing sco_sock_sendmsg to fail. Fixes: 0771cbb3b97d ("Bluetooth: SCO: Replace use of memcpy_from_msg with bt_skb_sendmsg") Tested-by: Tedd Ho-Jeong An Signed-off-by: Luiz Augusto von Dentz --- net/bluetooth/sco.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c index f51399d1b9cb..8eabf41b2993 100644 --- a/net/bluetooth/sco.c +++ b/net/bluetooth/sco.c @@ -284,16 +284,17 @@ static int sco_connect(struct hci_dev *hdev, struct sock *sk) static int sco_send_frame(struct sock *sk, struct sk_buff *skb) { struct sco_conn *conn = sco_pi(sk)->conn; + int len = skb->len; /* Check outgoing MTU */ - if (skb->len > conn->mtu) + if (len > conn->mtu) return -EINVAL; - BT_DBG("sk %p len %d", sk, skb->len); + BT_DBG("sk %p len %d", sk, len); hci_send_sco(conn->hcon, skb); - return skb->len; + return len; } static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) @@ -744,7 +745,8 @@ static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg, err = -ENOTCONN; release_sock(sk); - if (err) + + if (err < 0) kfree_skb(skb); return err; }