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Mon, 20 Apr 2020 04:32:44 -0400 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-430-3Gt_UdSlNjGcTNTuRtt-WQ-1; Mon, 20 Apr 2020 04:32:41 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 378561005509; Mon, 20 Apr 2020 08:32:40 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-113-6.ams2.redhat.com [10.36.113.6]) by smtp.corp.redhat.com (Postfix) with ESMTPS id EEEB296FB1; Mon, 20 Apr 2020 08:32:39 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id C251A11358C7; Mon, 20 Apr 2020 10:32:36 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587371563; 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=m2k6LewiTNFgf6Pzbdvr/rBx+uQJZq79kOGql1ICBkY=; b=KcN+NZ8LeKoU554TPO+j3AHeScDzc9ety/wCTxrHfnVPjxx4UpnDPu3uTvJftVcvzBnST7 mDM5HImv3CS/rFh/4vgn5jHwNRtf/m3QvTJl0aq1iR2lo0LXxCPBYsthfGyYQ0qkDnpuKD WTWa9Fl3Sck8gmJOpQ0y9Tp7KX0GwqA= X-MC-Unique: 3Gt_UdSlNjGcTNTuRtt-WQ-1 From: Markus Armbruster To: qemu-devel@nongnu.org Subject: [PATCH 11/11] migration/colo: Fix qmp_xen_colo_do_checkpoint() error handling Date: Mon, 20 Apr 2020 10:32:36 +0200 Message-Id: <20200420083236.19309-12-armbru@redhat.com> In-Reply-To: <20200420083236.19309-1-armbru@redhat.com> References: <20200420083236.19309-1-armbru@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=205.139.110.120; envelope-from=armbru@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs1p.gnu.org: First seen = 2020/04/20 04:32:42 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.120 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: Zhang Chen , zhanghailiang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" 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. qmp_xen_colo_do_checkpoint() passes @errp first to replication_do_checkpoint_all(), and then to colo_notify_filters_event(). If both fail, this will trip the assertion in error_setv(). Similar code in secondary_vm_do_failover() calls colo_notify_filters_event() only after replication_do_checkpoint_all() succeeded. Do the same here. Fixes: 0e8818f023616677416840d6ddc880db8de3c967 Cc: Zhang Chen Cc: zhanghailiang Signed-off-by: Markus Armbruster Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Zhang Chen Reviewed-by: zhanghailiang --- migration/colo.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/migration/colo.c b/migration/colo.c index a54ac84f41..1b3493729b 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -263,7 +263,13 @@ ReplicationStatus *qmp_query_xen_replication_status(Er= ror **errp) =20 void qmp_xen_colo_do_checkpoint(Error **errp) { - replication_do_checkpoint_all(errp); + Error *err =3D NULL; + + replication_do_checkpoint_all(&err); + if (err) { + error_propagate(errp, err); + return; + } /* Notify all filters of all NIC to do checkpoint */ colo_notify_filters_event(COLO_EVENT_CHECKPOINT, errp); } --=20 2.21.1