From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=205.220.180.131 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792644478; b=4wTvrDtCwXmy4gkvhzLht+brzWMysNjkwZg/25/jGg1UxHA1k9ldbuTB2NwMg+4zgNAv rF4W++pLF/rU9M0Pr0VKEL6GAZ8vkdgOz/oLjR7nQ2HysY0i8ZlGZL4CbIHT8/Dbx2yRw RkAxbuZPH01EZu/wYtYApYJpJLSO15/JeDY08/RE3tSaVhrGFFWgOj/coLvnpiSyOicsA 6tNuarhvx1qUcrPjHQU47TLMaDY751tzSxUycOyaq80ZLXaFjp7hMBCGJk1fpLQbuMkF1 M/DlqHTdZrT1Be04WjfCjPK2akxkfZLdpRn/QBSXANhPhuCZHV1KTIDmecwsFUKv12w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792644478; h=DMARC-Filter:Received:DKIM-Signature:Received:Received: DKIM-Signature:X-Google-DKIM-Signature:X-Forwarded-Encrypted: X-Gm-Message-State:X-Gm-Gg:X-Received:X-Received:Received:From:To:Cc: Subject:Date:Message-Id:X-Mailer:MIME-Version: Content-Transfer-Encoding:X-Proofpoint-GUID: X-Proofpoint-Spam-Details-Enc:X-Authority-Analysis: X-Proofpoint-Spam-Info:X-Proofpoint-ORIG-GUID: X-Proofpoint-Virus-Version:X-Proofpoint-Spam-Details; bh=nEUthsA2IFqMDFX786vIXrF7ZWojnc1c/eGLHmaf5pw=; b=jW4gyDHximUel4zgNIopF8RTj62NOmIpPraRGaFSLUgN/N0QU2Zb3tfzU5VtpRTf6teQ 5VYogX70fWW5IfCkrx3o9hfyNbEYA3AKmXcVtzl1t2JuevVDQ5/jaHUoeSfVc3O6DMlS7 ZX6Y8v0e4Cx/02WfYnivyt1XfoHTBjxtwgh4gICegpr2Gqo4jyfB+cxTBcrGvX8T5k/S0 0asqnX4X/uFiIaFQdeONtVnWoPAqpcghvYHU0lltgbMMR1jrlwzwS8/Hy8zrOchX7Wgkv UCNuZbNdp1lQ2g2trOzqf+FonPYbyuKYr9DjgnBN7zQFIw2bXa3dqo6ff/DA7jtyKrw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256 header.s=qcppdkim1 header.b=lm8+EQmd; dkim=pass header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.a=rsa-sha256 header.s=google header.b=bPPNHN2a; arc=none smtp.remote-ip=205.220.180.131 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8D7AC606A31A for ; Thu, 22 Oct 2026 04:47:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 8D7AC606A31A Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256 header.s=qcppdkim1 header.b=lm8+EQmd; dkim=pass (2048-bit key, unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.a=rsa-sha256 header.s=google header.b=bPPNHN2a Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 69M3jAFf2293450 for ; Thu, 22 Oct 2026 04:47:56 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:date:from:message-id:mime-version :subject:to; s=qcppdkim1; bh=nEUthsA2IFqMDFX786vIXrF7ZWojnc1c/eG LHmaf5pw=; b=lm8+EQmdvI3kntP7bZkb5J1LAcouhzGUmEcSKbykvPu8j55ljNg 8IeFQuvOxPQKavZcIaTJ1PJm027zVwoJjdWh4aaGRSBDqlHxAb9nRQ0/V8om9tX2 Mt9/3V6NyAKGP5MdxnRdm8lmPuSEFjvO05Mz3qt3HJfaI2I7tS9R8n7NeZg1T+Ri hEkY14DeF6B/mBPtzNuc5Xad1xhFeVvmsU941dBj7V/GdvxzwqAB5JhIV8xecAer 6ffS2iNpfr/RYb1q/VN+53b4yAX02oylD+36P27e3rUO1ZAT0M8EpWtPP7awzEQ/ ey1ZEe+HjtaOgUjOxSzBoOBVKkocEc4WdoQ== Received: from mail-dy1-f200.google.com (mail-dy1-f200.google.com [74.125.82.200]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4hf93brpjf-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 22 Oct 2026 04:47:56 +0000 (GMT) Received: by mail-dy1-f200.google.com with SMTP id 5a478bee46e88-33713e5e6daso2291740eec.0 for ; Wed, 21 Oct 2026 21:47:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1792644475; x=1793249275; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=nEUthsA2IFqMDFX786vIXrF7ZWojnc1c/eGLHmaf5pw=; b=bPPNHN2a9W7zucR4bw96lB7GYoOEMn3SfK1drLqOMWD9D6gAeZemj2ukvuW3fxxwAO 001qWdJXnunnh1uMTeUmQ3yRqwnVIg8oW6NdbP3T1LK1lOjVrJdzF9Qi0pCWSBRK/j9F gwIKNBQfMQS3dHplpfyh4k+llrTJZsgavzHnwQCCChNPemuMDAGS6Bg+NtYT5XbKT8YT XthzguJa2KmcGHqf0j+MkSACFAs3mzfE9XKC3E5u6+xoAdIGZWMhRgCk+3ep1WONDu9t p45focoxmyg6AWHCFJ7D4EzxKdN1PpE6QxVCmDTriLGCYlXsmWZQBkq7mNqdce/AOWwH 35mQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1792644475; x=1793249275; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=nEUthsA2IFqMDFX786vIXrF7ZWojnc1c/eGLHmaf5pw=; b=bK+5ix8CU0akhqUaUq0SsIDgXnEWfKdg3lL9G4rgcyBjkOVAOQli/b1jPXqt3HgKM/ C5ku37Udc2/fcx+Lg+FEzVldCaFZzS9IFTbjsiC6Mb7wayMQUla7wgVNUNvHn+WweF5y rdaQuJDXVd+CMQdopRmRMfndzkKjCQyGyqdukZqqme21ju98eqH6tGj8iVdF+FJRnUpo P9PeCtQJCpgYJVa33WPoHckh3yoifWxK6EQpp3xzC7I5lUqXfhrD2ByjgPS5h+h9lLQs f9foWqnf+UNA3pwR5mx9ZbfdkBuhKWpahyRYjATJO+N/OhEIsCs4cq7j/SwZp2oPqA0W 7GOg== X-Forwarded-Encrypted: i=1; AKwUvBxiVHtspphN98bx4QWxM83THA1qmvb126BcUdXNHDqCehgNJqxACOlkpGtdCen2j1I/NdDGB3e0fSqD1RU=@vger.kernel.org X-Gm-Message-State: AFq9FYLDXgfVfiPcoxWj1+rItTu+kwjVWW2au0TfG+sz4O9t2UsR0chc mkbnrZgaqxdJ3X/o5asqt5DT4DVmuL4krQQ9zGtnJ1BkzOtCKiBFP1LFSkbMJTs5CObGMJmt29d KwugzQp+W9nQJDev5dB7mdba0r6TR6fX2G8GfdbuofNSQb/c5VPkB1vKzUx58KLg3DaU= X-Gm-Gg: AYBFou1dRocHAfPGtRv9G26vJ/hVSi4fWcraRVCo3nhhz4/ICCwp5xP7f4KNAC+LSnx jJmmRstkicnqVG9WZ4StTdVSlbBEVHzstvjpudM/JxDrs5QJaHAOHAXBeSUHO0R4xnQ/LkAXty4 ke54xncP/Xhi/CQv6HbJ5+vBNv+irDPczjzeMFNB0aiUVFiqB8VYEX/rgSXM7OBkQw1whZXdRmF fBTXaZBRnBZHW8ntK0i/kep5inT5aBOdNxmICQEjlGj/yT5fCmqAgkDp7iYr2oSDwLJbOFIT9M5 funvUkETKxn7a0kmJo3Qgx6KPy7GeOIvfqizls8o6Fl6TQnwmdsfpmdkCuH/Iiv+Y2W7foXXv8N OhQWgLhW3NWArDyu8QcfBJbk2nlxF X-Received: by 2002:a05:693c:88d7:10b0:35b:91da:7cb with SMTP id 5a478bee46e88-3674e04fb43mr5913717eec.35.1792644475284; Wed, 21 Oct 2026 21:47:55 -0700 (PDT) X-Received: by 2002:a05:693c:88d7:10b0:35b:91da:7cb with SMTP id 5a478bee46e88-3674e04fb43mr5913679eec.35.1792644474697; Wed, 21 Oct 2026 21:47:54 -0700 (PDT) Received: from hu-prashk-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36741f753f7sm13071866eec.27.2026.10.21.21.47.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Oct 2026 21:47:54 -0700 (PDT) From: Prashanth K To: Thinh Nguyen , Greg Kroah-Hartman Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Krishna Kurapati , Prashanth K Subject: [PATCH v2] usb: dwc3: qcom: check for hcd in dwc3_qcom_read_usb2_speed Date: Thu, 22 Oct 2026 10:17:48 +0530 Message-Id: <20261022044748.2303528-1-prashanth.k@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: MTzewJkaTIMkrntM7T_15m1pFV9t55Ae X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIyMDAxOCBTYWx0ZWRfX/DhbNMHyHRmw KluC288CsOl6YkJs8Bz8oFQaXg7bw+WcWyTeUuaomyha8qzO+kitLlzEkORm+rlAgV4y2pSwsEz Izh5BYITrLT0ucFG4/mfEpJrIebwXkopR9Ew9EkfZlp6G0Ag8K+DAcNZxLFGKRMWqBUUQ1Fp3D1 nh8wpTnjz/wz6J3l7QzhINmMPOKna1wtgNdoYSiu4XPHDosS2ATSxmJyw0/edBuz0YHRDBUXI5M ykBckx4kJXTFFNa4b+tIKaKkmIJ7cfaGEb7h7dJ4Q78QH+dGuv4oVahNfUjD1Xou+UXLfNsspNV 5vhcm4bpk/R3B1eHmtcn1Gu1qjZZJxiEJ+wnJtv7p4AG2rIIixW83soYne9bbVhA90k8t+qbozk cC0rhFHs0MQfWFz9c596d7b/THPJBajUcsfxFVPrQqOH8tDF6XihLLoQ1oc5QlRoBOZHGsdcTsU U3H7uxqgtZEUDTXU0vA== X-Authority-Analysis: v=2.4 cv=HJxWhYtv c=1 sm=1 tr=0 ts=6ad9957c cx=c_pps a=PfFC4Oe2JQzmKTvty2cRDw==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=i82cPfGn_hM9wOwWQywA:9 a=6Ab_bkdmUrQuMsNx7PHu:22 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIyMDAxOCBTYWx0ZWRfX8yltT+6XwgIn BqwOPV+9obQV4EmE1k+mxs01ImZQtJ92M+LADaN+DfBKYF0FnDNUkzCo9830GDlmgm5PDi9xWA5 1YimTp+Tqv+uOvIujnIT7mSl4h5Hlg8= X-Proofpoint-ORIG-GUID: MTzewJkaTIMkrntM7T_15m1pFV9t55Ae X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-10-22_02,2026-10-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 malwarescore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 adultscore=0 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610220018 Currently dwc->xhci is not cleared if xhci_plat_probe() fails. During system suspend, dwc3_qcom_read_usb2_speed() checks dwc->xhci and assumes xhci is initialised. Since the probe failed, hcd will be null, and the subsequent access results in a NULL pointer dereference Unable to handle kernel NULL pointer dereference at virtual address 0000000000000058 Call trace: dwc3_qcom_pm_suspend dpm_run_callback device_suspend dpm_suspend dpm_suspend_start suspend_devices_and_enter pm_suspend Explicitly check the hcd pointer in dwc3_qcom_read_usb2_speed before accessing it. Fixes: 6895ea55c385 ("usb: dwc3: qcom: Configure wakeup interrupts during suspend") Signed-off-by: Prashanth K --- Changes in v2: - Added null pointer check in dwc3-qcom.c instead of marking xhci as null in host.c - Link to v1: https://lore.kernel.org/all/20261014105711.1708244-1-prashanth.k@oss.qualcomm.com drivers/usb/dwc3/dwc3-qcom.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index ac68b4218b56..6ca51d37c35a 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -241,7 +241,8 @@ static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom, i hcd = platform_get_drvdata(dwc->xhci); #ifdef CONFIG_USB - udev = usb_hub_find_child(hcd->self.root_hub, port_index + 1); + if (hcd) + udev = usb_hub_find_child(hcd->self.root_hub, port_index + 1); #else udev = NULL; #endif -- 2.34.1