From patchwork Mon Jan 18 11:34:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 365981 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=-18.8 required=3.0 tests=BAYES_00,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 ABC73C4332E for ; Mon, 18 Jan 2021 19:27:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79FF722C9E for ; Mon, 18 Jan 2021 19:27:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393756AbhART06 (ORCPT ); Mon, 18 Jan 2021 14:26:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:34108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390433AbhARLiL (ORCPT ); Mon, 18 Jan 2021 06:38:11 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 8B3FE2222A; Mon, 18 Jan 2021 11:36:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1610969805; bh=9WDmxl/CUD42kTmVZNq2QHjPCFpT1qSSXntCIXC47dE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=022MLbVtGLhUAoqEOAuEHGCFlWs4KlPJccg4PwcFmXdNlgAHHWM0NLCfttsk8p2M8 7RhMA+eLYnHrcBF0anBC8MFnhGPw5EZuR76P0JKbZ6e6GDkL9K9b9xYU5wcDPkYQXi S/ukTcl88d+fczZpSQnJ6/3juy5i9be/ZF3ftrLQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Halcrow , Andreas Dilger , Jan Kara , Theodore Tso Subject: [PATCH 4.19 33/43] ext4: fix superblock checksum failure when setting password salt Date: Mon, 18 Jan 2021 12:34:56 +0100 Message-Id: <20210118113336.550144567@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210118113334.966227881@linuxfoundation.org> References: <20210118113334.966227881@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jan Kara commit dfd56c2c0c0dbb11be939b804ddc8d5395ab3432 upstream. When setting password salt in the superblock, we forget to recompute the superblock checksum so it will not match until the next superblock modification which recomputes the checksum. Fix it. CC: Michael Halcrow Reported-by: Andreas Dilger Fixes: 9bd8212f981e ("ext4 crypto: add encryption policy and password salt support") Signed-off-by: Jan Kara Link: https://lore.kernel.org/r/20201216101844.22917-8-jack@suse.cz Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/ext4/ioctl.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -1092,7 +1092,10 @@ resizefs_out: err = ext4_journal_get_write_access(handle, sbi->s_sbh); if (err) goto pwsalt_err_journal; + lock_buffer(sbi->s_sbh); generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); + ext4_superblock_csum_set(sb); + unlock_buffer(sbi->s_sbh); err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh); pwsalt_err_journal: