From patchwork Tue Aug 13 11:18:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Faisal Hassan X-Patchwork-Id: 819074 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 BC9A72233A; Tue, 13 Aug 2024 11:19:11 +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=1723547953; cv=none; b=c3+E2MKSj91ntUVVoyCzOCVCF9x15od3hVtOZXdW1nDfqd3KhoMhO8XnhKkmbEYuaAwgzuz0oh5fSN9u95ZKvixagyzLJ+MoZa9jxqyNtGQZryHxxyYZQlRu5DcSOz5VW5fBOlgPFHuB0dXWWKnXfXUW2+4aggSMBBkf1ZwUW6g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723547953; c=relaxed/simple; bh=nTgO3/WVPFWHGcAmsl+De5efQqjEbiiftIZhGCBwWRg=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=EK22C7hQ4iIejrpi3LhdPgvA0qtGJn5HMhaFM6ZpHFoEPsq2MzoxX1hP2s2Y3Td8fWOKIw1GejPAwpmLljQr3dB9xbv1ZzCT6vrPPviJ3zG/Oi+n9VRioS4N71sAvpwAEyk7cc2iiy4tboOCrmyZXxaw04J90nzUGB5CUaN56ds= 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=NVH+15j0; 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="NVH+15j0" Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47DA8MKq001849; Tue, 13 Aug 2024 11:19:09 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-type:date:from:message-id:mime-version:subject:to; s= qcppdkim1; bh=fFw6PPSGVYmhEQJSF6OKOrAlimKMXFRHZpCVw2iITe8=; b=NV H+15j03avPvrcYn3x/pcaEZGTojJMjnfuvncgFUEBinfc0Q6/995zRewqVmZK4vO PSWKJHJaSZoQlkUxJArH9XYQUHwpiebU406cz0zQS8kuKPg/+7jLT0t8RPl/cLpC A+3utI8k1ImBRSkle7nZ8o81OmJHUgtp5XQ3IJB/snd6eTS/12q9+rsqjCPUy7Ik DLYGO7HmoYgAaULL4BVG3j+nJ+3q4tG09pMY8CP/0ZMFoi5udYu71EoQxbGIhMR1 hkhNOt9USFeVPKsnSp+iVLV9w62x7yuMGFs8wAs+2EDvTUWp5Aib6ML64uPPQtxX Q0dm5MRk8XsI7YsQ5MDw== Received: from nasanppmta03.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 40x167yaum-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 13 Aug 2024 11:19:08 +0000 (GMT) Received: from nasanex01a.na.qualcomm.com (nasanex01a.na.qualcomm.com [10.52.223.231]) by NASANPPMTA03.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTPS id 47DBJ8RT028931 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 13 Aug 2024 11:19:08 GMT Received: from hu-faisalh-hyd.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; Tue, 13 Aug 2024 04:19:05 -0700 From: Faisal Hassan To: Thinh Nguyen , Greg Kroah-Hartman CC: , , , Faisal Hassan , Subject: [PATCH] usb: dwc3: qcom: fix NULL pointer dereference on dwc3_qcom_read_usb2_speed Date: Tue, 13 Aug 2024 16:48:47 +0530 Message-ID: <20240813111847.31062-1-quic_faisalh@quicinc.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk X-Mailing-List: linux-usb@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: y-FJDqH8_uq8u3h1-4qV15wclXb_Nl4B X-Proofpoint-ORIG-GUID: y-FJDqH8_uq8u3h1-4qV15wclXb_Nl4B X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-13_03,2024-08-13_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1011 suspectscore=0 mlxlogscore=773 impostorscore=0 malwarescore=0 spamscore=0 mlxscore=0 priorityscore=1501 phishscore=0 adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408130081 Null pointer dereference occurs when accessing 'hcd' to detect speed from dwc3_qcom_suspend after the xhci-hcd is unbound. To avoid this issue, ensure to check for NULL in dwc3_qcom_read_usb2_speed. echo xhci-hcd.0.auto > /sys/bus/platform/drivers/xhci-hcd/unbind xhci_plat_remove() -> usb_put_hcd() -> hcd_release() -> kfree(hcd) Unable to handle kernel NULL pointer dereference at virtual address 0000000000000060 Call trace: dwc3_qcom_suspend.part.0+0x17c/0x2d0 [dwc3_qcom] dwc3_qcom_runtime_suspend+0x2c/0x40 [dwc3_qcom] pm_generic_runtime_suspend+0x30/0x44 __rpm_callback+0x4c/0x190 rpm_callback+0x6c/0x80 rpm_suspend+0x10c/0x620 pm_runtime_work+0xc8/0xe0 process_one_work+0x1e4/0x4f4 worker_thread+0x64/0x43c kthread+0xec/0x100 ret_from_fork+0x10/0x20 Fixes: c5f14abeb52b ("usb: dwc3: qcom: fix peripheral and OTG suspend") Cc: stable@vger.kernel.org Signed-off-by: Faisal Hassan Acked-by: Thinh Nguyen --- drivers/usb/dwc3/dwc3-qcom.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 88fb6706a18d..0c7846478655 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -319,13 +319,15 @@ static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom) static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom, int port_index) { struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3); - struct usb_device *udev; + struct usb_device __maybe_unused *udev; struct usb_hcd __maybe_unused *hcd; /* * FIXME: Fix this layering violation. */ hcd = platform_get_drvdata(dwc->xhci); + if (!hcd) + return USB_SPEED_UNKNOWN; #ifdef CONFIG_USB udev = usb_hub_find_child(hcd->self.root_hub, port_index + 1);