From mboxrd@z Thu Jan 1 00:00:00 1970 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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 C2E34C43333 for ; Tue, 2 Mar 2021 00:03:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A833060295 for ; Tue, 2 Mar 2021 00:03:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347193AbhCAXwR (ORCPT ); Mon, 1 Mar 2021 18:52:17 -0500 Received: from mail.kernel.org ([198.145.29.99]:39422 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239691AbhCASS0 (ORCPT ); Mon, 1 Mar 2021 13:18:26 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id E1809652D3; Mon, 1 Mar 2021 17:38:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614620309; bh=WZQ8E4iiGne1eG2pllJoNNwnvslluunwrSZPfb+qQ8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zsZP3n8qHtG7DInA8VaWcH8/WYZYiy0Uq03uRUsn2noQdh2n6UyAwKbEoHEdharn+ /qvnqhPUEPI51km/J1VgSkrWXz3gO6ymPu/mKEsMWCM1qfpqlftSx7+lKeKG/RuxEE i7RXhlk4e9a1q2o1iuVcDDtZE8nBEJ2GYj+vb6DE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jupeng Zhong , Marcel Holtmann , Sasha Levin Subject: [PATCH 5.11 076/775] Bluetooth: btusb: Fix memory leak in btusb_mtk_wmt_recv Date: Mon, 1 Mar 2021 17:04:04 +0100 Message-Id: <20210301161205.434062923@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161201.679371205@linuxfoundation.org> References: <20210301161201.679371205@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jupeng Zhong [ Upstream commit de71a6cb4bf24d8993b9ca90d1ddb131b60251a1 ] In btusb_mtk_wmt_recv if skb_clone fails, the alocated skb should be released. Omit the labels “err_out” and “err_free_skb” in this function implementation so that the desired exception handling code would be directly specified in the affected if branches. Fixes: a1c49c434e15 ("btusb: Add protocol support for MediaTek MT7668U USB devices") Signed-off-by: Jupeng Zhong Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- drivers/bluetooth/btusb.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index da57c561642c4..a4f834a50a988 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -3195,7 +3195,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb) skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC); if (!skb) { hdev->stat.err_rx++; - goto err_out; + return; } hci_skb_pkt_type(skb) = HCI_EVENT_PKT; @@ -3213,13 +3213,18 @@ static void btusb_mtk_wmt_recv(struct urb *urb) */ if (test_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) { data->evt_skb = skb_clone(skb, GFP_ATOMIC); - if (!data->evt_skb) - goto err_out; + if (!data->evt_skb) { + kfree_skb(skb); + return; + } } err = hci_recv_frame(hdev, skb); - if (err < 0) - goto err_free_skb; + if (err < 0) { + kfree_skb(data->evt_skb); + data->evt_skb = NULL; + return; + } if (test_and_clear_bit(BTUSB_TX_WAIT_VND_EVT, &data->flags)) { @@ -3228,11 +3233,6 @@ static void btusb_mtk_wmt_recv(struct urb *urb) wake_up_bit(&data->flags, BTUSB_TX_WAIT_VND_EVT); } -err_out: - return; -err_free_skb: - kfree_skb(data->evt_skb); - data->evt_skb = NULL; return; } else if (urb->status == -ENOENT) { /* Avoid suspend failed when usb_kill_urb */ -- 2.27.0