From nobody Sat Feb 7 05:33:34 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 72789C4332F for ; Wed, 19 Oct 2022 12:18:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232625AbiJSMR7 (ORCPT ); Wed, 19 Oct 2022 08:17:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232944AbiJSMRW (ORCPT ); Wed, 19 Oct 2022 08:17:22 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1DBA6051D; Wed, 19 Oct 2022 04:53:23 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id B09EFB822EF; Wed, 19 Oct 2022 08:44:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1D992C433D6; Wed, 19 Oct 2022 08:43:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666169040; bh=mGqmo0S/cZ1DZJ0WQ/Bt9WjSLdXTjqMxohIkX6GdePo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=we71KixHcSMFLmA9PPV8btBkfZoVPANvwJW/jYFOqdtblhfmO9qQQnaZ2UHMzYwR/ NLFLI+prnBCVY+DtmXuoAVCkQYa3gQKmj9HSVQQBBrXfAXx0+RoQAqb6eLagj5sI1f FRIrBmn7MOrX27jbTWCyJsFlc/NI06SJvrZkr8X4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jan Kara , Lukas Czerner , Theodore Tso Subject: [PATCH 6.0 138/862] ext4: fix check for block being out of directory size Date: Wed, 19 Oct 2022 10:23:45 +0200 Message-Id: <20221019083256.084935161@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Jan Kara commit 61a1d87a324ad5e3ed27c6699dfc93218fcf3201 upstream. The check in __ext4_read_dirblock() for block being outside of directory size was wrong because it compared block number against directory size in bytes. Fix it. Fixes: 65f8ea4cd57d ("ext4: check if directory block is within i_size") CVE: CVE-2022-1184 CC: stable@vger.kernel.org Signed-off-by: Jan Kara Reviewed-by: Lukas Czerner Link: https://lore.kernel.org/r/20220822114832.1482-1-jack@suse.cz Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/namei.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -126,7 +126,7 @@ static struct buffer_head *__ext4_read_d struct ext4_dir_entry *dirent; int is_dx_block =3D 0; =20 - if (block >=3D inode->i_size) { + if (block >=3D inode->i_size >> inode->i_blkbits) { ext4_error_inode(inode, func, line, block, "Attempting to read directory block (%u) that is past i_size (%ll= u)", block, inode->i_size);