From patchwork Wed Jun 21 08:02:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13286838 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 31EFEEB64DC for ; Wed, 21 Jun 2023 08:15:53 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qBszc-0004fx-DR; Wed, 21 Jun 2023 04:15:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qBszX-0004ew-Jj for qemu-devel@nongnu.org; Wed, 21 Jun 2023 04:15:04 -0400 Received: from mga18.intel.com ([134.134.136.126]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qBszV-0002s8-91 for qemu-devel@nongnu.org; Wed, 21 Jun 2023 04:15:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687335301; x=1718871301; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=mNuXNxjtVp9RLH7yf+INXJlD+blwYMF2DVMvyiVISEQ=; b=P8afrtrteYSg7ei/MgN7oj+7Am7hQ4P8sWNf41aCirfuj0r6+d5wiJba /PCqMadoz9FJPlu1c0hbWXWCiyrruB+GIDIc9xSjBjs5Dt6C+DmAmqWMY cUE1vNWmw1haRR+tQoBFPwdt8fQH8VE15vsCMxS4UCeeY10GWzO1RSWQS 7JlQX3X9qGgjWS5rgQQWrjQjpWuqlDPlZtpHv/+4KoPmn8t6oyEqyAe5p EWBb0DAEcGsxAdqQff7/E2jiM8YarkACMEWIiTXfkYhneqrleK6mZe8+T 5A9LSv4nogWG0WM/uaAPW5xZU+kPuNCp2tZlludw9aDG4/PYZvojbxAl6 A==; X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="344843456" X-IronPort-AV: E=Sophos;i="6.00,259,1681196400"; d="scan'208";a="344843456" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 01:14:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="804282290" X-IronPort-AV: E=Sophos;i="6.00,259,1681196400"; d="scan'208";a="804282290" Received: from duan-server-s2600bt.bj.intel.com ([10.240.192.147]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 01:14:57 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, joao.m.martins@oracle.com, avihaih@nvidia.com, chao.p.peng@intel.com Subject: [PATCH v3 1/3] vfio/pci: Fix resource leak in vfio_realize Date: Wed, 21 Jun 2023 16:02:02 +0800 Message-Id: <20230621080204.420723-2-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230621080204.420723-1-zhenzhong.duan@intel.com> References: <20230621080204.420723-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.126; envelope-from=zhenzhong.duan@intel.com; helo=mga18.intel.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When adding migration blocker failed in vfio_migration_realize(), hotplug will fail and we see below: (qemu) device_add vfio-pci,host=81:11.1,id=vfio1,bus=root1,x-enable-migration=true 0000:81:11.1: VFIO migration is not supported in kernel Error: disallowing migration blocker (--only-migratable) for: VFIO device doesn't support migration If we hotplug again we should see same log as above, but we see: (qemu) device_add vfio-pci,host=81:11.0,id=vfio0,bus=root0,x-enable-migration=true Error: vfio 0000:81:11.0: device is already attached That's because some references to VFIO device isn't released, we should check return value of vfio_migration_realize() and release the references, then VFIO device will be truely released when hotplug failed. Signed-off-by: Zhenzhong Duan --- hw/vfio/pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index 73874a94de12..c71b0955d81c 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3210,6 +3210,7 @@ static void vfio_realize(PCIDevice *pdev, Error **errp) ret = vfio_migration_realize(vbasedev, errp); if (ret) { error_report("%s: Migration disabled", vbasedev->name); + goto out_deregister; } }