From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 37B90C433E3 for ; Mon, 24 Aug 2020 09:28:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0EF132075B for ; Mon, 24 Aug 2020 09:28:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598261321; bh=CNhFNAUvh1EmrgeFYiDEaS9LJYFkJitLo/xMDYLQ+vY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DQoFCYhSsnJ93PYcTC+JPRGnEgokejDRkUScukneKfwzidvNnkSV+/SzXsc3fdslf 3xAS5yoeoV8OzsXDHOJvr7Bne9TkXhkK5ukXlNovjc7yPJtpblVJs8DpEDcMDuvySP Mu4DgJJuRBBEz3LawbpAxuG1mcb8H+xrLUNmkuJ4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729511AbgHXIvj (ORCPT ); Mon, 24 Aug 2020 04:51:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:56476 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728460AbgHXIv0 (ORCPT ); Mon, 24 Aug 2020 04:51:26 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A227D2072D; Mon, 24 Aug 2020 08:51:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598259086; bh=CNhFNAUvh1EmrgeFYiDEaS9LJYFkJitLo/xMDYLQ+vY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tkUFqxXD41PeIBty5Tm1JRYAjyAxjLpYryjB2mLM82QOXkHfDm9XzZe+JMFc7fipW w5dJqIb0ck9Zgav74cuGb8pT9hp9qVbqmEzLBeOHTIAWd0cGXDA/8j+t9llv0Y2Skc 9MyFnULSDrWwW+rUSJkXGyvixSEff2jrIiloq540= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "zhangyi (F)" , Ritesh Harjani , stable@kernel.org, Theodore Tso Subject: [PATCH 4.9 15/39] jbd2: add the missing unlock_buffer() in the error path of jbd2_write_superblock() Date: Mon, 24 Aug 2020 10:31:14 +0200 Message-Id: <20200824082349.270439673@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200824082348.445866152@linuxfoundation.org> References: <20200824082348.445866152@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: zhangyi (F) commit ef3f5830b859604eda8723c26d90ab23edc027a4 upstream. jbd2_write_superblock() is under the buffer lock of journal superblock before ending that superblock write, so add a missing unlock_buffer() in in the error path before submitting buffer. Fixes: 742b06b5628f ("jbd2: check superblock mapped prior to committing") Signed-off-by: zhangyi (F) Reviewed-by: Ritesh Harjani Cc: stable@kernel.org Link: https://lore.kernel.org/r/20200620061948.2049579-1-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/jbd2/journal.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -1340,8 +1340,10 @@ static int jbd2_write_superblock(journal int ret; /* Buffer got discarded which means block device got invalidated */ - if (!buffer_mapped(bh)) + if (!buffer_mapped(bh)) { + unlock_buffer(bh); return -EIO; + } trace_jbd2_write_superblock(journal, write_flags); if (!(journal->j_flags & JBD2_BARRIER))