From patchwork Mon Jul 12 06:02:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 475918 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41BB4C07E99 for ; Mon, 12 Jul 2021 06:55:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2BDE6613D4 for ; Mon, 12 Jul 2021 06:55:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236432AbhGLG6b (ORCPT ); Mon, 12 Jul 2021 02:58:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:58276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239415AbhGLG5d (ORCPT ); Mon, 12 Jul 2021 02:57:33 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 321286128D; Mon, 12 Jul 2021 06:54:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626072879; bh=P8qrU43jfgJLpn/pAToQSjNm8URnaGL9yseGQMdHxaA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j1yNAL0BV5+9u4R7zzPxyUUkeCFj4v0N4peN2V3BU6a41PCtrtEiEk/5YczpFu4/+ nKhVpd+Xoy9LYGJfwuVeqKtpJJD5HK/WmiywxB55yG4ChL6rvmmDCzqN9n+h3jI4qj 5eJWsEUG0zGfBS/5Bvk8S9br2PS4M2GWxCmLgvoM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hulk Robot , Yang Yingliang , Theodore Tso Subject: [PATCH 5.12 052/700] ext4: return error code when ext4_fill_flex_info() fails Date: Mon, 12 Jul 2021 08:02:15 +0200 Message-Id: <20210712060932.050543519@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Yang Yingliang commit 8f6840c4fd1e7bd715e403074fb161c1a04cda73 upstream. After commit c89128a00838 ("ext4: handle errors on ext4_commit_super"), 'ret' may be set to 0 before calling ext4_fill_flex_info(), if ext4_fill_flex_info() fails ext4_mount() doesn't return error code, it makes 'root' is null which causes crash in legacy_get_tree(). Fixes: c89128a00838 ("ext4: handle errors on ext4_commit_super") Reported-by: Hulk Robot Cc: # v4.18+ Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20210510111051.55650-1-yangyingliang@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/super.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5039,6 +5039,7 @@ no_journal: ext4_msg(sb, KERN_ERR, "unable to initialize " "flex_bg meta info!"); + ret = -ENOMEM; goto failed_mount6; }