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=-10.0 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 8AE35C433F7 for ; Mon, 27 Jul 2020 14:15:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5D1FE208E4 for ; Mon, 27 Jul 2020 14:15:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595859358; bh=RgO0TP/iRYtNkeSLth77M7W8mnKYQYOlWQZEK7CcPqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=DyuzrVUxTb+8eIEi2Zm1T1Kd1bmvEUEG6RhqsbupaplIUJ2ZfRFF/tGgnhtfTOzvR hnut06P6sI93rPQaE2HWZ7+JOpHkJLCAtVQp3M6iug5F0rmhl3Wycfyxz7ByQkND1v na3JqbiW4+K7Iev4jFsWSMm7QDqXHD0UfV7q85O4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730770AbgG0OP5 (ORCPT ); Mon, 27 Jul 2020 10:15:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:42602 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730756AbgG0OPz (ORCPT ); Mon, 27 Jul 2020 10:15:55 -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 E4DB62070A; Mon, 27 Jul 2020 14:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595859355; bh=RgO0TP/iRYtNkeSLth77M7W8mnKYQYOlWQZEK7CcPqQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nSNlX+h1QWh5kXcM1wLNVdnBhX+FdgPSivB6AePnjGo1tFEOKDq/eBr8CN84SOHkb LiZtBH4sochgnT4TIMOFopAL3PkTOSLlhglaHeyuqRB27hT/UhNB007e8+YelLDRbJ 2OVuECwyH/1HS5BtFdqYLHVGP8oAG82xuL8X9U2o= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Filipe Manana , Nikolay Borisov , Robbie Ko , David Sterba Subject: [PATCH 5.4 035/138] btrfs: fix page leaks after failure to lock page for delalloc Date: Mon, 27 Jul 2020 16:03:50 +0200 Message-Id: <20200727134927.124861452@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200727134925.228313570@linuxfoundation.org> References: <20200727134925.228313570@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Robbie Ko commit 5909ca110b29aa16b23b52b8de8d3bb1035fd738 upstream. When locking pages for delalloc, we check if it's dirty and mapping still matches. If it does not match, we need to return -EAGAIN and release all pages. Only the current page was put though, iterate over all the remaining pages too. CC: stable@vger.kernel.org # 4.14+ Reviewed-by: Filipe Manana Reviewed-by: Nikolay Borisov Signed-off-by: Robbie Ko Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/extent_io.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1923,7 +1923,8 @@ static int __process_pages_contig(struct if (!PageDirty(pages[i]) || pages[i]->mapping != mapping) { unlock_page(pages[i]); - put_page(pages[i]); + for (; i < ret; i++) + put_page(pages[i]); err = -EAGAIN; goto out; }