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 6A20CC433E3 for ; Mon, 27 Jul 2020 14:10:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 38007208E4 for ; Mon, 27 Jul 2020 14:10:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595859000; bh=fNNGJtJfEFGX8ICt0ObBEYfzYIbiR1UeXw3xbwn3LOQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=zdp0MIK9WaA//cFwuPewDE9CIpuwUkRu1Jg659Qb+4kmkzuoQwmNkRjjw6Gx3uyQw 6W+Ce17z/6djUuzw4/bWcOKUDwgLzogzDLmOGQ8a1/NPa/SQ5phlh0+qEXxMXYT+2L bhW9Z3Dtd3dCzSHBbua+Mn7hV5nO/FA+5gUcuSZo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729745AbgG0OJ6 (ORCPT ); Mon, 27 Jul 2020 10:09:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:60444 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729718AbgG0OJw (ORCPT ); Mon, 27 Jul 2020 10:09:52 -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 717D420838; Mon, 27 Jul 2020 14:09:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1595858991; bh=fNNGJtJfEFGX8ICt0ObBEYfzYIbiR1UeXw3xbwn3LOQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BxGcnc3ljXaur8LKZVLTEydb/lx/Gk+dhLziXBEhpMELGeNx8+nG0glh11GoYGCPi g4wvzVuTnODql0SxOG/3hMovGdkwAITN5lMveFiXnjBIwMlYykJ7CxXcN++sOpp5E2 0y29kVgfEojy9C7SGma9uYCVblcbRHZyPQB+fr98= 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 4.19 24/86] btrfs: fix page leaks after failure to lock page for delalloc Date: Mon, 27 Jul 2020 16:03:58 +0200 Message-Id: <20200727134915.576144409@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200727134914.312934924@linuxfoundation.org> References: <20200727134914.312934924@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: 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 @@ -1707,7 +1707,8 @@ 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; }