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 635E9C4708D for ; Mon, 5 Dec 2022 19:41:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233846AbiLETl0 (ORCPT ); Mon, 5 Dec 2022 14:41:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234666AbiLETlD (ORCPT ); Mon, 5 Dec 2022 14:41:03 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D52110DF for ; Mon, 5 Dec 2022 11:38:32 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 9CA9361315 for ; Mon, 5 Dec 2022 19:38:31 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AE943C433D6; Mon, 5 Dec 2022 19:38:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670269111; bh=3NZEkU0notptiz0ioGUAGgeZybSJG80riUxZSavH21g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BEsWEoAJ6WeKMuAc3v+nfSF2o807IKdbhwBbJwMhudgYtpavBsre/n7rAlIzSCmdD 5cD24F81+gcBZxZwBW+GLa9IX30QENNNea+8TeblfNyQciuc+WkN3Jb2tyxXApK4/T kd5YuUbbqySCJLuNGL2hQnxXm7W4ASVtX+AOoOyY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiongfeng Wang , Lu Baolu , Joerg Roedel , Sasha Levin Subject: [PATCH 5.15 102/120] iommu/vt-d: Fix PCI device refcount leak in dmar_dev_scope_init() Date: Mon, 5 Dec 2022 20:10:42 +0100 Message-Id: <20221205190809.616107105@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221205190806.528972574@linuxfoundation.org> References: <20221205190806.528972574@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 [ Upstream commit 4bedbbd782ebbe7287231fea862c158d4f08a9e3 ] for_each_pci_dev() is implemented by pci_get_device(). The comment of pci_get_device() says that it will increase the reference count for the returned pci_dev and also decrease the reference count for the input pci_dev @from if it is not NULL. If we break for_each_pci_dev() loop with pdev not NULL, we need to call pci_dev_put() to decrease the reference count. Add the missing pci_dev_put() for the error path to avoid reference count leak. Fixes: 2e4552893038 ("iommu/vt-d: Unify the way to process DMAR device scope array") Signed-off-by: Xiongfeng Wang Link: https://lore.kernel.org/r/20221121113649.190393-3-wangxiongfeng2@huawei.com Signed-off-by: Lu Baolu Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/intel/dmar.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c index f026bd269cb0..bff2420fc3e1 100644 --- a/drivers/iommu/intel/dmar.c +++ b/drivers/iommu/intel/dmar.c @@ -822,6 +822,7 @@ int __init dmar_dev_scope_init(void) info = dmar_alloc_pci_notify_info(dev, BUS_NOTIFY_ADD_DEVICE); if (!info) { + pci_dev_put(dev); return dmar_dev_scope_status; } else { dmar_pci_bus_add_dev(info); -- 2.35.1