From patchwork Thu Apr 16 13:24:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 227673 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 0220AC2BB55 for ; Thu, 16 Apr 2020 15:14:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D2CCF21D7E for ; Thu, 16 Apr 2020 15:14:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587050093; bh=If3d0bFf0ABqG7dx9nfsBE7DqGX0DiVXtdEGTMR+un8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tKeDJlbjfhlTY+Y/+C133N+h1rrScAXQYo18NKCoVnCN8nHRZxQM1W9e8H6oejpQV 37dMUi8RAjtH0+X9NATtFwPYwDSxDVeXYlF7XT4nAWgWCKM8twFjQRwM7szMKfPAUI idZVR1mxqpsvknseYkwAeFoIVpqxR+A1rTbl3uno= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2502600AbgDPPOp (ORCPT ); Thu, 16 Apr 2020 11:14:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:36108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2441677AbgDPNuL (ORCPT ); Thu, 16 Apr 2020 09:50:11 -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 3294022251; Thu, 16 Apr 2020 13:50:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587045004; bh=If3d0bFf0ABqG7dx9nfsBE7DqGX0DiVXtdEGTMR+un8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Or41//+Wkbqpr2D4S0yh4DiQbcF+P4cxI26I8fsRQfaN836Z7Ef4qbVl262EIiORz 6Nim8A/et8ltEEhe6nCmtbuCIwlOqiGXWkHnuwlkiAvnpmZE2mLjoqDVKq+scRAPzX a5fYHeM1MRmyrK0qw328BzmDr5wXmusWOFYmF1nE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Trond Myklebust Subject: [PATCH 5.4 191/232] NFS: Fix a page leak in nfs_destroy_unlinked_subrequests() Date: Thu, 16 Apr 2020 15:24:45 +0200 Message-Id: <20200416131339.021103296@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131316.640996080@linuxfoundation.org> References: <20200416131316.640996080@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Trond Myklebust commit add42de31721fa29ed77a7ce388674d69f9d31a4 upstream. When we detach a subrequest from the list, we must also release the reference it holds to the parent. Fixes: 5b2b5187fa85 ("NFS: Fix nfs_page_group_destroy() and nfs_lock_and_join_requests() race cases") Cc: stable@vger.kernel.org # v4.14+ Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/write.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -441,6 +441,7 @@ nfs_destroy_unlinked_subrequests(struct } subreq->wb_head = subreq; + nfs_release_request(old_head); if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) { nfs_release_request(subreq);