From patchwork Thu Feb 8 23:13:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 13550693 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 D1BAD50A69; Thu, 8 Feb 2024 23:14:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707434081; cv=none; b=k6o0/4y/uCFNBri65Z74+SllONLrClYptR88RqhxkOlMpcFqeaNeNwxCf9YZQVjeyPFSvvwH7NAzc7v4qXekdwSyTe6MCm1TQgP8qE6SZED3J5wVO76aJhem3qOpBA/XcchQibwep9AtxarEK1UOSPEzpQdQ7Ho2sDZhUC3exJk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707434081; c=relaxed/simple; bh=/ctydeO9BP9IDNCKzOW84UaD1pWVBJmsNl/Vixk3Z5M=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GkZY9ipzkBQjDdj7Uk898r/G9UvOY4bhQDSMXLCt0S2R3OrJKeAhQlVSAqYmnZNqxqCV8dW2ATBH6NqHhwXuWEFZQDJof4NU5FlWioP02M0rPiV7+fqyF3TZSgt1P3zyHEBmoWRJd24rmHHhbtYpoG+wj5cA4h1z2Xzahs5/0Pg= 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=nVQssM6t; arc=none smtp.client-ip=205.220.180.131 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="nVQssM6t" Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 418KhRQ8019816; Thu, 8 Feb 2024 23:14:17 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=2sOcjxKmnstL/5ftZf58 41vds3YmEI4sRJLRwbFI4Jw=; b=nVQssM6tWjWN+AaUAvEFXjHBVSCl3GR1MBZh mZFhvLraLcunmZDyhyQSOKFzRqUd/Mw3Y5IvW5xNhYUS0CpIBDF2tixyabrxLKvA e5i3Er14Y8SwtwFliKeNPHTCCF+mgIsluMGAeCDQ3Oj4J7km9R1eCIZVTsGocVh2 o4TSc7EJUvSZsRWRMpToJBnc1zBvyCf7aNJV1GnM7uw54YQTiQxp/trSTsoi+A3I rP040Qj3+mrKgJfiPDqCnFzjPAZjpewOwzYoHMv+LNfy2jE9fPswvNXeQdbS3Aoe csJQq7b6ZIahHEpZ3Diw/VNZmh+oPErw4ooZShyXh8w1GYpPgg== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3w4frwujtt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 08 Feb 2024 23:14:17 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 418NEGP5009144 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 8 Feb 2024 23:14:16 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 8 Feb 2024 15:14:15 -0800 From: Wesley Cheng To: , , , , , , , , , , , , , , CC: , , , , , , , Mathias Nyman , Wesley Cheng Subject: [PATCH v14 01/53] xhci: fix possible null pointer dereference at secondary interrupter removal Date: Thu, 8 Feb 2024 15:13:14 -0800 Message-ID: <20240208231406.27397-2-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240208231406.27397-1-quic_wcheng@quicinc.com> References: <20240208231406.27397-1-quic_wcheng@quicinc.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: UP_Bh-r2YyQE-WRxE1odBi-VgumwIQ2N X-Proofpoint-GUID: UP_Bh-r2YyQE-WRxE1odBi-VgumwIQ2N 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=2024-02-08_11,2024-02-08_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 spamscore=0 suspectscore=0 bulkscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 adultscore=0 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402080131 From: Mathias Nyman Don't try to remove a secondary interrupter that is known to be invalid. Also check if the interrupter is valid inside the spinlock that protects the array of interrupters. Found by smatch static checker Reported-by: Dan Carpenter Closes: https://lore.kernel.org/linux-usb/ffaa0a1b-5984-4a1f-bfd3-9184630a97b9@moroto.mountain/ Fixes: c99b38c41234 ("xhci: add support to allocate several interrupters") Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20240125152737.2983959-2-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci-mem.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 4460fa7e9fab..d00d4d937236 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1861,14 +1861,14 @@ void xhci_remove_secondary_interrupter(struct usb_hcd *hcd, struct xhci_interrup struct xhci_hcd *xhci = hcd_to_xhci(hcd); unsigned int intr_num; + spin_lock_irq(&xhci->lock); + /* interrupter 0 is primary interrupter, don't touch it */ - if (!ir || !ir->intr_num || ir->intr_num >= xhci->max_interrupters) + if (!ir || !ir->intr_num || ir->intr_num >= xhci->max_interrupters) { xhci_dbg(xhci, "Invalid secondary interrupter, can't remove\n"); - - /* fixme, should we check xhci->interrupter[intr_num] == ir */ - /* fixme locking */ - - spin_lock_irq(&xhci->lock); + spin_unlock_irq(&xhci->lock); + return; + } intr_num = ir->intr_num;