From patchwork Wed Feb 28 08:33:43 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prashanth K X-Patchwork-Id: 13575028 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 6A74E2DF92; Wed, 28 Feb 2024 08:34:00 +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=1709109242; cv=none; b=TjphOOAohBUFGmNcV8uDqKYd3vLcpdWen2ezl2TclRddt+8klLr7wbXoxsR9eSHF7wZQIA+WI0GybRB2JFWku+We61iHhQXHqCPfyDjvF95pKYFK4y+0noMs6PinqWZzYMIf8n86HKVL/S9bc2DUMZbXrJcIWPBRurj9E4ozLPM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709109242; c=relaxed/simple; bh=aOlzv2ms+slQM3Izb/zjipw0Sn3ySfHbf+ICKPL9UTo=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=dif73JPuq0yZQMEYXwl4E56y3gaKY7TVK+kTwJYZBFHehOLs/f9Pc2oz6fk7fObSDdkpqX5MkRBIZ6d3XLajDwBTc8e+0LK0dvFrWA+qJYlUHFRZJkVzW8ZyvxtsDjMTvqJISWS6WTJonWEzh5pyuJj0yZMY1cuyEAz4fEEdORM= 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=psrwFdSc; 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="psrwFdSc" Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 41S4KI1Q007196; Wed, 28 Feb 2024 08:33:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding:content-type; s=qcppdkim1; bh=SY4ByAm QqkjRwFRnacQzAJoXNdftSjJlDeUuGPnHpDY=; b=psrwFdSc2dFSEwZIKuspgY8 xWcLDAs2vHB6eQXFF4uHBbQPlAxxVPRPg7llCThraphFnQlAqAayHbYftvbglpPd v0jtc2+lhMyPLIZNSimurh/OEqXbJeLR0hPcoclrVw1CKymIJ3fefVEajGXM1T6A 0/vdoU1Wi/VxV/DddobVdlqtsd+kikR6fO6vGbjuTMHAzHgWjueqbuOF1Lrycg/s rtRI7URBCc2a2Wu0KqffE1eThsFTU/p0JSQrcT5DCtZqn5sGuVyooo4vRxzHXLkA ItHKn1Sq+ogIPZdwvrNSQjSNuBleRhwJf+ksECVlg6mS/FJE8VJFMbylpsnK+MA= = Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3whtbw8rsh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Feb 2024 08:33:58 +0000 (GMT) Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 41S8XvHI004655 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 28 Feb 2024 08:33:57 GMT Received: from hu-prashk-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Wed, 28 Feb 2024 00:33:55 -0800 From: Prashanth K To: Greg Kroah-Hartman , Mathias Nyman CC: , , Prashanth K , Subject: [PATCH] usb: xhci: Add error handling in xhci_map_urb_for_dma Date: Wed, 28 Feb 2024 14:03:43 +0530 Message-ID: <20240228083343.3101303-1-quic_prashk@quicinc.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: Pj9u1zt1yPLALrxqoIal9qM1qezI6nCc X-Proofpoint-ORIG-GUID: Pj9u1zt1yPLALrxqoIal9qM1qezI6nCc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-28_04,2024-02-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 spamscore=0 mlxlogscore=636 lowpriorityscore=0 mlxscore=0 bulkscore=0 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402280066 Currently xhci_map_urb_for_dma() creates a temporary buffer and copies the SG list to the new linear buffer. But if the kzalloc_node() fails, then the following sg_pcopy_to_buffer() can lead to crash since it tries to memcpy to NULL pointer. So return -EAGAIN if kzalloc returns null pointer. Cc: # 5.11 Fixes: 2017a1e58472 ("usb: xhci: Use temporary buffer to consolidate SG") Signed-off-by: Prashanth K --- drivers/usb/host/xhci.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index c057c42c36f4..0597a60bec34 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1218,6 +1218,9 @@ static int xhci_map_temp_buffer(struct usb_hcd *hcd, struct urb *urb) temp = kzalloc_node(buf_len, GFP_ATOMIC, dev_to_node(hcd->self.sysdev)); + if (!temp) + return -EAGAIN; + if (usb_urb_dir_out(urb)) sg_pcopy_to_buffer(urb->sg, urb->num_sgs, temp, buf_len, 0);