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=-9.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 9087DC0044C for ; Wed, 31 Oct 2018 23:34:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 58C2220664 for ; Wed, 31 Oct 2018 23:34:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="zNUplruM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 58C2220664 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730603AbeKAIe4 (ORCPT ); Thu, 1 Nov 2018 04:34:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:59044 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728870AbeKAIJQ (ORCPT ); Thu, 1 Nov 2018 04:09:16 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C5AEC20840; Wed, 31 Oct 2018 23:09:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1541027345; bh=rXvm4yLOg3hKafGlOFCpoqvD/2Y3lDZLtfXB6kDzcIA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zNUplruM+nWzPlWxUMF4PZMhpzm1gOUtA35+UXDTEsjp0QNTRtTnnN6dI/VvVuXTT oCD9Sf1OlAkruTOIrbGCxKlxp7hKwjilpQsUMVT8uk6Yt7DixmLhKwc9zLmX18N68H zBXPb25YxdVfT7f4Y4pYMLTcxT1kIIGy8aFtLuzs= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Xiao Ni , David Jeffery , Shaohua Li , Sasha Levin Subject: [PATCH AUTOSEL 4.18 077/126] MD: Memory leak when flush bio size is zero Date: Wed, 31 Oct 2018 19:07:05 -0400 Message-Id: <20181031230754.29029-77-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181031230754.29029-1-sashal@kernel.org> References: <20181031230754.29029-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiao Ni [ Upstream commit af9b926de9c5986ab009e64917de87c9758bab10 ] flush_pool is leaked when flush bio size is zero Fixes: 5a409b4f56d5 ("MD: fix lock contention for flush bios") Signed-off-by: David Jeffery Signed-off-by: Xiao Ni Signed-off-by: Shaohua Li Signed-off-by: Sasha Levin --- drivers/md/md.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 994aed2f9dff..e9be5cd9bb96 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -455,10 +455,11 @@ static void md_end_flush(struct bio *fbio) rdev_dec_pending(rdev, mddev); if (atomic_dec_and_test(&fi->flush_pending)) { - if (bio->bi_iter.bi_size == 0) + if (bio->bi_iter.bi_size == 0) { /* an empty barrier - all done */ bio_endio(bio); - else { + mempool_free(fi, mddev->flush_pool); + } else { INIT_WORK(&fi->flush_work, submit_flushes); queue_work(md_wq, &fi->flush_work); } @@ -512,10 +513,11 @@ void md_flush_request(struct mddev *mddev, struct bio *bio) rcu_read_unlock(); if (atomic_dec_and_test(&fi->flush_pending)) { - if (bio->bi_iter.bi_size == 0) + if (bio->bi_iter.bi_size == 0) { /* an empty barrier - all done */ bio_endio(bio); - else { + mempool_free(fi, mddev->flush_pool); + } else { INIT_WORK(&fi->flush_work, submit_flushes); queue_work(md_wq, &fi->flush_work); } -- 2.17.1