From patchwork Wed Mar 19 02:37:41 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ren, Jianqi (Jacky) (CN)" X-Patchwork-Id: 14021960 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 B8C5213DDB9; Wed, 19 Mar 2025 02:38:42 +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=1742351924; cv=none; b=TLwwGzFTwxey1iIJmHDE4ORBpLRfmsu+8kpp9F4fZivcmNrY/vtiV3Cyoi2+eJbjQ+5rTPZe2BOTdsV/JTS1PPayGUAfSciHez7rk0gYgEQz0ueCNM76xmzoOYwOIrvoTSKQWh90TVEuGQ1PHRtXIGFswXZqugqnE4nO1v0C7mI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742351924; c=relaxed/simple; bh=UK+DFx0zekguPPA1xLGOZkgkPBl0vVGvugn2cPZEb2s=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=YQrddUDp66e63VYrjYw8RtedRgvPW0jE7uo6ZPTlMBvKqEJYiox4umV2b5PkmYOv2T7gK4fulY+EJ4ouQTEr56ZXPzsbQug/nyhqeBFaH8tAzR+bKVGVXlhq21D5J12fg1gajRMat15bDHPW8GmqoCpFUXwKn74zWPopg+i9ePg= 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 52J1S3fv015231; Wed, 19 Mar 2025 02:37:46 GMT Received: from ala-exchng01.corp.ad.wrs.com (ala-exchng01.wrs.com [147.11.82.252]) by mx0a-0064b401.pphosted.com (PPS) with ESMTPS id 45cxs0v53g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 19 Mar 2025 02:37:46 +0000 (GMT) Received: from ALA-EXCHNG02.corp.ad.wrs.com (147.11.82.254) by ala-exchng01.corp.ad.wrs.com (147.11.82.252) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.43; Tue, 18 Mar 2025 19:37:45 -0700 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; Tue, 18 Mar 2025 19:37:42 -0700 From: To: CC: , , , , , , , , , , , Subject: [PATCH 6.1.y] smb: client: fix potential UAF in cifs_dump_full_key() Date: Wed, 19 Mar 2025 10:37:41 +0800 Message-ID: <20250319023741.922528-1-jianqi.ren.cn@windriver.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: NdeE3YcFlthwkM3I29nemHpK4f04O29Y X-Proofpoint-GUID: NdeE3YcFlthwkM3I29nemHpK4f04O29Y X-Authority-Analysis: v=2.4 cv=NY/m13D4 c=1 sm=1 tr=0 ts=67da2dfa cx=c_pps a=/ZJR302f846pc/tyiSlYyQ==:117 a=/ZJR302f846pc/tyiSlYyQ==:17 a=Vs1iUdzkB0EA:10 a=Li1AiuEPAAAA:8 a=VwQbUJbxAAAA:8 a=yMhMjlubAAAA:8 a=t7CeM3EgAAAA:8 a=1_rInJw21EjIxf1COpsA:9 a=qGKPP_lnpMOaqR3bcYHU:22 a=FdTzh2GWekK77mhwV6Dw:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-18_10,2025-03-17_03,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 bulkscore=0 spamscore=0 mlxscore=0 phishscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1011 mlxlogscore=999 impostorscore=0 adultscore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.21.0-2502280000 definitions=main-2503190017 From: Paulo Alcantara [ Upstream commit 58acd1f497162e7d282077f816faa519487be045 ] Skip sessions that are being teared down (status == SES_EXITING) to avoid UAF. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (Red Hat) Signed-off-by: Steve French Signed-off-by: Jianqi Ren Signed-off-by: He Zhe --- Verified the build test --- fs/smb/client/ioctl.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/smb/client/ioctl.c b/fs/smb/client/ioctl.c index ae9905e2b9d4..7402070b7a06 100644 --- a/fs/smb/client/ioctl.c +++ b/fs/smb/client/ioctl.c @@ -246,7 +246,9 @@ static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(server_it, &cifs_tcp_ses_list, tcp_ses_list) { list_for_each_entry(ses_it, &server_it->smb_ses_list, smb_ses_list) { - if (ses_it->Suid == out.session_id) { + spin_lock(&ses_it->ses_lock); + if (ses_it->ses_status != SES_EXITING && + ses_it->Suid == out.session_id) { ses = ses_it; /* * since we are using the session outside the crit @@ -254,9 +256,11 @@ static int cifs_dump_full_key(struct cifs_tcon *tcon, struct smb3_full_key_debug * so increment its refcount */ ses->ses_count++; + spin_unlock(&ses_it->ses_lock); found = true; goto search_end; } + spin_unlock(&ses_it->ses_lock); } } search_end: