From patchwork Mon Apr 22 14:38:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: quic_zijuhu X-Patchwork-Id: 791295 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (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 E3DCD136988; Mon, 22 Apr 2024 14:38:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713796722; cv=none; b=iAo8W4k1KifBPt+2jO2Mfk3pirNOUgbU4+pylZcSzQ5zao+qHkI5/etJF3eVcA7x6WAneZWXl4og5DN6gOnsuO6Al02gk5qu8ieZn/4AokBe9yx8OzW+lsr2MS+0HNQUfvZ9rUGGckUtloRCSw1AdLLs0UZBdyUhFurnuFEq4JY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713796722; c=relaxed/simple; bh=VNO6Mqi6R/XJirCRwJEET8C11oUvTKC9nn9vXKrK+Fs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=JTPXkmuGm8g26GiWMAgNKHjI8kDwV9P3lYfmCBcD332bj9/tngoYQPhI6s17A6h3XaQw9nlH+6mVqifrmeca2HkUXwzEbg9rgq1yEmKmKVb3sB8dAJwYBqiIpoHmbUZ9G092dNFMurCBGwWrsli5hMtEE6SACOJfJw7xJXFO0vI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com; spf=pass smtp.mailfrom=quicinc.com; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b=eFrbztRX; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="eFrbztRX" Received: from pps.filterd (m0279866.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 43MCVFmT029830; Mon, 22 Apr 2024 14:38:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type; s=qcppdkim1; bh=Kml/BNNRnpJQre3NnwqK fYDT6Nfpd2mQuE3+j50MdJw=; b=eFrbztRXaOu0JOmsnZ/Qz41/cHNmkZvNH9oc 6VuFiZSBTj5XAblCd26n5Pfv6kZ/xbyjeEhZPXgSi7zRRbAWIzREoUdj9XkxdqAU gzm6T5EdXAdHJpwfR7oUEqPs49Dxntgx5dOprgR30RJod7Nel2aIlENfqAhNYtOB jaxqZLNgszG6M2s6VnDhsOmHba8WSaWm9y2mYYXp7UXBoX1p+WDUm19G9YcI+97D hF3HetnC2d/15fio2UUJ1raTjzWonKbhkpVv2tQrLVmnM2bnsth+4JFuCuxUrphf 5PrN3xvzJh8DEgrJO9niY9bI/mEpk8j2gwUo/0p6yDvr2BIaMA== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3xnn82gsbc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 Apr 2024 14:38:35 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 43MEcYNv013305 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 22 Apr 2024 14:38:34 GMT Received: from zijuhu-gv.qualcomm.com (10.80.80.8) by nasanex01a.na.qualcomm.com (10.52.223.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 22 Apr 2024 07:38:32 -0700 From: Zijun Hu To: , , CC: , , , Subject: [PATCH v2 RESEND] Bluetooth: qca: Fix crash when btattach BT controller QCA_ROME Date: Mon, 22 Apr 2024 22:38:22 +0800 Message-ID: <1713796702-22861-1-git-send-email-quic_zijuhu@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1704970181-30092-1-git-send-email-quic_zijuhu@quicinc.com> References: <1704970181-30092-1-git-send-email-quic_zijuhu@quicinc.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nasanex01a.na.qualcomm.com (10.52.223.231) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: kL9Ioo8glbYByFcKQl7hIwkwgIPLlcXq X-Proofpoint-ORIG-GUID: kL9Ioo8glbYByFcKQl7hIwkwgIPLlcXq X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-04-22_09,2024-04-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 priorityscore=1501 clxscore=1011 suspectscore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 spamscore=0 phishscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2404220063 A crash will happen when use tool btattach to attach a BT controller QCA_ROME, and it is caused by dereferencing nullptr hu->serdev, fixed by null check before access. sudo btattach -B /dev/ttyUSB0 -P qca Bluetooth: hci1: QCA setup on UART is completed BUG: kernel NULL pointer dereference, address: 00000000000002f0 ...... Workqueue: hci1 hci_power_on [bluetooth] RIP: 0010:qca_setup+0x7c1/0xe30 [hci_uart] ...... Call Trace: ? show_regs+0x72/0x90 ? __die+0x25/0x80 ? page_fault_oops+0x154/0x4c0 ? srso_alias_return_thunk+0x5/0xfbef5 ? kmem_cache_alloc+0x16b/0x310 ? do_user_addr_fault+0x330/0x6e0 ? srso_alias_return_thunk+0x5/0xfbef5 ? exc_page_fault+0x84/0x1b0 ? asm_exc_page_fault+0x27/0x30 ? qca_setup+0x7c1/0xe30 [hci_uart] hci_uart_setup+0x5c/0x1a0 [hci_uart] hci_dev_open_sync+0xee/0xca0 [bluetooth] hci_dev_do_open+0x2a/0x70 [bluetooth] hci_power_on+0x46/0x210 [bluetooth] process_one_work+0x17b/0x360 worker_thread+0x307/0x430 ? __pfx_worker_thread+0x10/0x10 kthread+0xf7/0x130 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x46/0x70 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 Fixes: 03b0093f7b31 ("Bluetooth: hci_qca: get wakeup status from serdev device handle") Cc: Signed-off-by: Zijun Hu Tested-by: Zijun Hu --- drivers/bluetooth/hci_qca.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index 92fa20f5ac7d..fdaf83d817af 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1955,7 +1955,7 @@ static int qca_setup(struct hci_uart *hu) qca_debugfs_init(hdev); hu->hdev->hw_error = qca_hw_error; hu->hdev->cmd_timeout = qca_cmd_timeout; - if (device_can_wakeup(hu->serdev->ctrl->dev.parent)) + if (hu->serdev && device_can_wakeup(hu->serdev->ctrl->dev.parent)) hu->hdev->wakeup = qca_wakeup; } else if (ret == -ENOENT) { /* No patch/nvm-config found, run with original fw/config */