From nobody Mon Feb 9 16:45:34 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE6ACC88CB2 for ; Mon, 12 Jun 2023 14:01:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236823AbjFLOBK (ORCPT ); Mon, 12 Jun 2023 10:01:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236177AbjFLOA5 (ORCPT ); Mon, 12 Jun 2023 10:00:57 -0400 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B603310E6 for ; Mon, 12 Jun 2023 07:00:54 -0700 (PDT) Received: from kwepemm600012.china.huawei.com (unknown [172.30.72.53]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4QftcS0cSHzTl2s; Mon, 12 Jun 2023 22:00:24 +0800 (CST) Received: from build.huawei.com (10.175.101.6) by kwepemm600012.china.huawei.com (7.193.23.74) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 12 Jun 2023 22:00:51 +0800 From: Wenchao Hao To: Jan Kara , CC: , Wenchao Hao Subject: [PATCH 2/2] udf:check if buffer head's data when getting lvidiu Date: Tue, 13 Jun 2023 11:22:54 +0800 Message-ID: <20230613032254.1235752-3-haowenchao2@huawei.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20230613032254.1235752-1-haowenchao2@huawei.com> References: <20230613032254.1235752-1-haowenchao2@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.175.101.6] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To kwepemm600012.china.huawei.com (7.193.23.74) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" We can not always assume udf_sb_info->s_lvid_bh's data is valid. If the data is corrupted, we would get an incorrect offset and cause the following code access an illegal address. Signed-off-by: Wenchao Hao --- fs/udf/super.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/udf/super.c b/fs/udf/super.c index 6304e3c5c3d9..71481b60c871 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -114,6 +114,8 @@ struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(str= uct super_block *sb) =20 if (!UDF_SB(sb)->s_lvid_bh) return NULL; + if (!udf_check_tagged_bh(sb, UDF_SB(sb)->s_lvid_bh)) + return NULL; lvid =3D (struct logicalVolIntegrityDesc *)UDF_SB(sb)->s_lvid_bh->b_data; partnum =3D le32_to_cpu(lvid->numOfPartitions); /* The offset is to skip freeSpaceTable and sizeTable arrays */ --=20 2.35.3