From nobody Mon Feb 9 19:52:19 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; dmarc=fail(p=none dis=none) header.from=virtuozzo.com Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1552463027716805.4668203198333; Wed, 13 Mar 2019 00:43:47 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 305E8C08E293; Wed, 13 Mar 2019 07:43:46 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id EB5EF66824; Wed, 13 Mar 2019 07:43:45 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 86242181A136; Wed, 13 Mar 2019 07:43:45 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id x2D7h6lu009635 for ; Wed, 13 Mar 2019 03:43:07 -0400 Received: by smtp.corp.redhat.com (Postfix) id BEF4D605CB; Wed, 13 Mar 2019 07:43:06 +0000 (UTC) Received: from mx1.redhat.com (ext-mx20.extmail.prod.ext.phx2.redhat.com [10.5.110.49]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B8069605C9 for ; Wed, 13 Mar 2019 07:43:04 +0000 (UTC) Received: from relay.sw.ru (relay.sw.ru [185.231.240.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id A9C9A3132C45 for ; Wed, 13 Mar 2019 07:43:02 +0000 (UTC) Received: from [10.94.3.220] (helo=dim-vz7.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1h3yXU-0000pk-Ha for libvir-list@redhat.com; Wed, 13 Mar 2019 10:43:00 +0300 From: Nikolay Shirokovskiy To: libvir-list@redhat.com Date: Wed, 13 Mar 2019 10:39:48 +0300 Message-Id: <1552462789-715109-4-git-send-email-nshirokovskiy@virtuozzo.com> In-Reply-To: <1552462789-715109-1-git-send-email-nshirokovskiy@virtuozzo.com> References: <1552462789-715109-1-git-send-email-nshirokovskiy@virtuozzo.com> X-Greylist: Sender passed SPF test, ACL 242 matched, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Wed, 13 Mar 2019 07:43:03 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Wed, 13 Mar 2019 07:43:03 +0000 (UTC) for IP:'185.231.240.75' DOMAIN:'relay.sw.ru' HELO:'relay.sw.ru' FROM:'nshirokovskiy@virtuozzo.com' RCPT:'' X-RedHat-Spam-Score: -0.001 (SPF_PASS) 185.231.240.75 relay.sw.ru 185.231.240.75 relay.sw.ru X-Scanned-By: MIMEDefang 2.84 on 10.5.110.49 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH v2 3/4] tools: console: check if console was shutdown in callbacks X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.31]); Wed, 13 Mar 2019 07:43:46 +0000 (UTC) Content-Type: text/plain; charset="utf-8" On error in main thread virConsoleShutdown is called which deletes fd watches/stream callback and yet callbacks can be called after. Thus we can incorrectly allocate terminalToStream.data memory and get memory leak for example. Let's check if console was shutdown in the very beginning of callbacks. Signed-off-by: Nikolay Shirokovskiy --- tools/virsh-console.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/virsh-console.c b/tools/virsh-console.c index 3dae707..d109734 100644 --- a/tools/virsh-console.c +++ b/tools/virsh-console.c @@ -139,6 +139,10 @@ virConsoleEventOnStream(virStreamPtr st, =20 virObjectLock(con); =20 + /* we got late event after console was shutdown */ + if (!con->st) + goto cleanup; + if (events & VIR_STREAM_EVENT_READABLE) { size_t avail =3D con->streamToTerminal.length - con->streamToTerminal.offset; @@ -219,6 +223,10 @@ virConsoleEventOnStdin(int watch ATTRIBUTE_UNUSED, =20 virObjectLock(con); =20 + /* we got late event after console was shutdown */ + if (!con->st) + goto cleanup; + if (events & VIR_EVENT_HANDLE_READABLE) { size_t avail =3D con->terminalToStream.length - con->terminalToStream.offset; @@ -279,6 +287,10 @@ virConsoleEventOnStdout(int watch ATTRIBUTE_UNUSED, =20 virObjectLock(con); =20 + /* we got late event after console was shutdown */ + if (!con->st) + goto cleanup; + if (events & VIR_EVENT_HANDLE_WRITABLE && con->streamToTerminal.offset) { ssize_t done; --=20 1.8.3.1 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list