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=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 C0825C432BE for ; Fri, 27 Aug 2021 04:57:43 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 7F96260EB0 for ; Fri, 27 Aug 2021 04:57:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 7F96260EB0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:47240 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mJTvy-0005lI-OS for qemu-devel@archiver.kernel.org; Fri, 27 Aug 2021 00:57:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60726) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJTpV-0008SH-S0 for qemu-devel@nongnu.org; Fri, 27 Aug 2021 00:51:03 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:39330) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mJTpR-0000yZ-QV for qemu-devel@nongnu.org; Fri, 27 Aug 2021 00:51:00 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1630039856; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nil4oCky2ThalrTE8B6Fj1sg0/nu8aLttq8dyMFcGz0=; b=SenfJbw3sFhgdP5PT4gbGTByJFZh6eJH4UFKk+13RDNdgjq5b7KO1EFza3Tt7rIV3MkZTw 6/M24B6b0mS+PXrfB3z7uOxPmo9YT4rxas76o2EaS0BrZvvam9ZiI/iA/QsMsh6Rfm8gsy 8B6zfyY4vmxN9XmbFQe3CkQyqXBGwcg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-34-_Gt9aym6NwGu7xwkBZHF8w-1; Fri, 27 Aug 2021 00:50:54 -0400 X-MC-Unique: _Gt9aym6NwGu7xwkBZHF8w-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8B912185302D; Fri, 27 Aug 2021 04:50:53 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-112-4.ams2.redhat.com [10.36.112.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id EB7DA604CC; Fri, 27 Aug 2021 04:50:45 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 89C1C11380B7; Fri, 27 Aug 2021 06:50:44 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PULL 04/15] multi-process: Fix pci_proxy_dev_realize() error handling Date: Fri, 27 Aug 2021 06:50:33 +0200 Message-Id: <20210827045044.388748-5-armbru@redhat.com> In-Reply-To: <20210827045044.388748-1-armbru@redhat.com> References: <20210827045044.388748-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=armbru@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) DKIMWL_WL_HIGH=-0.742, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Elena Ufimtseva , peter.maydell@linaro.org, Jagannathan Raman , John G Johnson , "Michael S . Tsirkin" , Stefan Hajnoczi , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. pci_proxy_dev_realize() is wrong that way: it passes @errp to qio_channel_new_fd() without checking for failure. If it runs into another failure, it trips error_setv()'s assertion. Fix it to check for failure properly. Fixes: 9f8112073aad8e485ac012ee18809457ab7f23a6 Cc: Elena Ufimtseva Cc: Jagannathan Raman Cc: John G Johnson Cc: Stefan Hajnoczi Signed-off-by: Markus Armbruster Message-Id: <20210720125408.387910-5-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé Acked-by: Jagannathan Raman Acked-by: Michael S. Tsirkin --- hw/remote/proxy.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/hw/remote/proxy.c b/hw/remote/proxy.c index 6dda705fc2..499f540c94 100644 --- a/hw/remote/proxy.c +++ b/hw/remote/proxy.c @@ -102,10 +102,18 @@ static void pci_proxy_dev_realize(PCIDevice *device, Error **errp) } dev->ioc = qio_channel_new_fd(fd, errp); + if (!dev->ioc) { + close(fd); + return; + } error_setg(&dev->migration_blocker, "%s does not support migration", TYPE_PCI_PROXY_DEV); - migrate_add_blocker(dev->migration_blocker, errp); + if (migrate_add_blocker(dev->migration_blocker, errp) < 0) { + error_free(dev->migration_blocker); + object_unref(dev->ioc); + return; + } qemu_mutex_init(&dev->io_mutex); qio_channel_set_blocking(dev->ioc, true, NULL); -- 2.31.1