From nobody Sun Dec 14 13:50:13 2025 Received: from mx0b-0064b401.pphosted.com (mx0b-0064b401.pphosted.com [205.220.178.238]) (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 892FB1E9B03; Wed, 11 Dec 2024 09:17:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.178.238 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733908675; cv=none; b=Gdf517FFs62TJCDf71MKtoUFGByW/y71EymAzu+jmnz9qwpSkZWyolRsZPuvem69ZVhnPVl5YY5AEPy16i75kisgMY3A8BtESB5XWrDXEXMrZFsWdTdwBeWSZapnaEjHE4xIaihCaiDgZ4Cv5UHLvVIpZBWAqazoCqXyLfy3kSY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733908675; c=relaxed/simple; bh=z7iM/covW97ys+D32rC5qV8I6qBJB+AFReA3wSZATSs=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=HBaR8qdO1l6lbXWEjcChDN9/fDT9vnfRp2HgGEjaoek7WKQbTTRO/e8LRNubgn7ROynDdlmcNdUQflPwW6LAr1asZKtFGjjyUfW9OsPqmn0bjvMcQDHTBboC2odZS71XNv1U9+WGyWQMMXRMUZ6rZ148eGeFU8XEUraHhkPc7yY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=windriver.com; spf=pass smtp.mailfrom=windriver.com; arc=none smtp.client-ip=205.220.178.238 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=windriver.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=windriver.com Received: from pps.filterd (m0250811.ppops.net [127.0.0.1]) by mx0a-0064b401.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4BB5x2Fm012144; Wed, 11 Dec 2024 09:17:46 GMT Received: from ala-exchng02.corp.ad.wrs.com (ala-exchng02.wrs.com [147.11.82.254]) by mx0a-0064b401.pphosted.com (PPS) with ESMTPS id 43cx4xbygs-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 11 Dec 2024 09:17:46 +0000 (GMT) Received: from ALA-EXCHNG02.corp.ad.wrs.com (147.11.82.254) by ALA-EXCHNG02.corp.ad.wrs.com (147.11.82.254) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.43; Wed, 11 Dec 2024 01:17:41 -0800 Received: from pek-lpg-core1.wrs.com (147.11.136.210) by ALA-EXCHNG02.corp.ad.wrs.com (147.11.82.254) with Microsoft SMTP Server id 15.1.2507.43 via Frontend Transport; Wed, 11 Dec 2024 01:17:39 -0800 From: To: , CC: , , , , , Subject: [PATCH 6.1.y] ssb: Fix potential NULL pointer dereference in ssb_device_uevent() Date: Wed, 11 Dec 2024 18:15:33 +0800 Message-ID: <20241211101533.2111952-1-jianqi.ren.cn@windriver.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Proofpoint-GUID: SSKDMirsQg4DFraXC1DqUmysOueSInQw X-Proofpoint-ORIG-GUID: SSKDMirsQg4DFraXC1DqUmysOueSInQw X-Authority-Analysis: v=2.4 cv=Y/UCsgeN c=1 sm=1 tr=0 ts=675958ba cx=c_pps a=K4BcnWQioVPsTJd46EJO2w==:117 a=K4BcnWQioVPsTJd46EJO2w==:17 a=RZcAm9yDv7YA:10 a=bC-a23v3AAAA:8 a=pGLkceISAAAA:8 a=HH5vDtPzAAAA:8 a=VwQbUJbxAAAA:8 a=t7CeM3EgAAAA:8 a=maAJvPpQ-1jnF_CgM8MA:9 a=-FEs8UIgK8oA:10 a=FO4_E8m0qiDe52t0p3_H:22 a=QM_-zKB-Ew0MsOlNKMB5:22 a=FdTzh2GWekK77mhwV6Dw:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2024-12-11_09,2024-12-10_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 mlxscore=0 clxscore=1015 malwarescore=0 priorityscore=1501 phishscore=0 suspectscore=0 adultscore=0 mlxlogscore=744 spamscore=0 impostorscore=0 classifier=spam authscore=0 adjust=0 reason=mlx scancount=1 engine=8.21.0-2411120000 definitions=main-2412110070 Content-Type: text/plain; charset="utf-8" From: Rand Deeb [ Upstream commit 789c17185fb0f39560496c2beab9b57ce1d0cbe7 ] The ssb_device_uevent() function first attempts to convert the 'dev' pointer to 'struct ssb_device *'. However, it mistakenly dereferences 'dev' before performing the NULL check, potentially leading to a NULL pointer dereference if 'dev' is NULL. To fix this issue, move the NULL check before dereferencing the 'dev' point= er, ensuring that the pointer is valid before attempting to use it. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Rand Deeb Signed-off-by: Kalle Valo Link: https://msgid.link/20240306123028.164155-1-rand.sec96@gmail.com Signed-off-by: Jianqi Ren --- drivers/ssb/main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c index d52e91258e98..aae50a5dfb57 100644 --- a/drivers/ssb/main.c +++ b/drivers/ssb/main.c @@ -341,11 +341,13 @@ static int ssb_bus_match(struct device *dev, struct d= evice_driver *drv) =20 static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *e= nv) { - struct ssb_device *ssb_dev =3D dev_to_ssb_dev(dev); + struct ssb_device *ssb_dev; =20 if (!dev) return -ENODEV; =20 + ssb_dev =3D dev_to_ssb_dev(dev); + return add_uevent_var(env, "MODALIAS=3Dssb:v%04Xid%04Xrev%02X", ssb_dev->id.vendor, ssb_dev->id.coreid, --=20 2.25.1