From patchwork Sun Mar 21 15:29:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhiqiang Liu X-Patchwork-Id: 12153105 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=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 4427CC433C1 for ; Sun, 21 Mar 2021 15:30:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F354761929 for ; Sun, 21 Mar 2021 15:30:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230262AbhCUPaJ (ORCPT ); Sun, 21 Mar 2021 11:30:09 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:13998 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230225AbhCUP3k (ORCPT ); Sun, 21 Mar 2021 11:29:40 -0400 Received: from DGGEMS409-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4F3M2P1TmhzrZNw; Sun, 21 Mar 2021 23:27:41 +0800 (CST) Received: from [127.0.0.1] (10.174.176.117) by DGGEMS409-HUB.china.huawei.com (10.3.19.209) with Microsoft SMTP Server id 14.3.498.0; Sun, 21 Mar 2021 23:29:30 +0800 To: , , CC: , , , linfeilong , , "wubo (T)" From: Zhiqiang Liu Subject: [PATCH] pci: fix memory leak when virtio pci hotplug Message-ID: Date: Sun, 21 Mar 2021 23:29:30 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 Content-Language: en-US X-Originating-IP: [10.174.176.117] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Feilong Lin Repeated hot-plugging of pci devices for a virtual machine driven by virtio, we found that there is a leak in kmalloc-4k, which was confirmed as the memory of the pci_device structure. Then we found out that it was missing pci_dev_put() after pci_get_slot() in enable_slot() of acpiphp_glue.c. Signed-off-by: Feilong Lin Reviewed-by: Zhiqiang Liu Reviewed-by: Wu Bo --- drivers/pci/hotplug/acpiphp_glue.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 3365c93abf0e..f031302ad401 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -533,6 +533,7 @@ static void enable_slot(struct acpiphp_slot *slot, bool bridge) slot->flags &= ~SLOT_ENABLED; continue; } + pci_dev_put(dev); } }