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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B2E5BC4332F for ; Wed, 23 Nov 2022 09:09:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237117AbiKWJI7 (ORCPT ); Wed, 23 Nov 2022 04:08:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237149AbiKWJId (ORCPT ); Wed, 23 Nov 2022 04:08:33 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 55B8E2A721 for ; Wed, 23 Nov 2022 01:08:28 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id E650FB81EF7 for ; Wed, 23 Nov 2022 09:08:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25E2FC433C1; Wed, 23 Nov 2022 09:08:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1669194505; bh=TDWJo+/Q0HmTyJ5NlMkhdnd/YOSlhX4ihMxZwGXkQv8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JDCoIvNBcH/gzO75/dH64+Whs05schwthwHLQXuIL0+yVmWb472+f2p5Z8oVYB2Ym MMo9QhNzAdi8k0mDDE+Ei/x3m6WS2WBSAQoWZcS+hfJFoqCoHBuy9azh/OEs9ms5i2 eyOAjcgy7bL7fcEckDeNj56vZe94nUPp0prYwQbc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiongfeng Wang , Ulf Hansson Subject: [PATCH 4.19 096/114] mmc: sdhci-pci: Fix possible memory leak caused by missing pci_dev_put() Date: Wed, 23 Nov 2022 09:51:23 +0100 Message-Id: <20221123084555.619688271@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221123084551.864610302@linuxfoundation.org> References: <20221123084551.864610302@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Xiongfeng Wang commit 222cfa0118aa68687ace74aab8fdf77ce8fbd7e6 upstream. pci_get_device() will increase the reference count for the returned pci_dev. We need to use pci_dev_put() to decrease the reference count before amd_probe() returns. There is no problem for the 'smbus_dev == NULL' branch because pci_dev_put() can also handle the NULL input parameter case. Fixes: 659c9bc114a8 ("mmc: sdhci-pci: Build o2micro support in the same module") Signed-off-by: Xiongfeng Wang Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221114083100.149200-1-wangxiongfeng2@huawei.com Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-pci-core.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/mmc/host/sdhci-pci-core.c +++ b/drivers/mmc/host/sdhci-pci-core.c @@ -1532,6 +1532,8 @@ static int amd_probe(struct sdhci_pci_ch } } + pci_dev_put(smbus_dev); + if (gen == AMD_CHIPSET_BEFORE_ML || gen == AMD_CHIPSET_CZ) chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;