From nobody Thu Nov 13 23:25:56 2025 Delivered-To: importer@patchew.org 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; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1583719394; cv=none; d=zohomail.com; s=zohoarc; b=loEjtPX7AR1BIEXOhZt2sGGB1/akYq16V6xEh7fADW9zVVDmzluraMnmMoA6bFEb6D26aeOAeJE5Vd2HDZjqaQBPH65PrFAgczQwngwYlFTPmh9U6eYJ4UIx+0hdBpfFMsJzv4gtREqr3nfFPRQUO4g1/dVFerfkDnvffM86vRU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1583719394; h=Content-Type:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To; bh=EYuANDYiDVI6fDEA7OE9fjIkNaDbCGnSt4nf52KRAMQ=; b=OPKzHPe+KMpKoZPkBQORCgUN231wjOiwJ9uP8fI4KSTFEw9CrjsiAiJomkv4had8Yk2JImKVzjbZ+VP4rcQ6hO3rX/8LEZY5y1obqNwD72To+jZC9nQ2JCY9YyDE3mZeI0ZhBTMZULfInfVrB3UVSTb/jOT4yOtfjfrUUIJMXK0= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 15837193948801001.5449807524977; Sun, 8 Mar 2020 19:03:14 -0700 (PDT) Received: from localhost ([::1]:35102 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jB7lA-0005lN-Ee for importer@patchew.org; Sun, 08 Mar 2020 22:03:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54260) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jB7kH-0005Kc-4M for qemu-devel@nongnu.org; Sun, 08 Mar 2020 22:02:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jB7kF-0001pE-S1 for qemu-devel@nongnu.org; Sun, 08 Mar 2020 22:02:16 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:41288 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jB7kB-0001cK-Qs for qemu-devel@nongnu.org; Sun, 08 Mar 2020 22:02:15 -0400 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 93561AC4954B6CF76FB6; Mon, 9 Mar 2020 10:02:07 +0800 (CST) Received: from localhost.huawei.com (10.175.104.216) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Mon, 9 Mar 2020 10:02:00 +0800 From: Pan Nengyuan To: , , , , Subject: [PATCH v3] virtio-serial-bus: Plug memory leak on realize() error paths Date: Mon, 9 Mar 2020 10:17:38 +0800 Message-ID: <20200309021738.30072-1-pannengyuan@huawei.com> X-Mailer: git-send-email 2.18.2 MIME-Version: 1.0 X-Originating-IP: [10.175.104.216] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.32 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.zhanghailiang@huawei.com, Pan Nengyuan , qemu-devel@nongnu.org, euler.robot@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" We neglect to free port->bh on the error paths. Fix that. Reproducer: {'execute': 'device_add', 'arguments': {'id': 'virtio_serial_pci0', 'dr= iver': 'virtio-serial-pci', 'bus': 'pci.0', 'addr': '0x5'}, 'id': 'yVkZcGgV= '} {'execute': 'device_add', 'arguments': {'id': 'port1', 'driver': 'virts= erialport', 'name': 'port1', 'chardev': 'channel1', 'bus': 'virtio_serial_p= ci0.0', 'nr': 1}, 'id': '3dXdUgJA'} {'execute': 'device_add', 'arguments': {'id': 'port2', 'driver': 'virts= erialport', 'name': 'port2', 'chardev': 'channel2', 'bus': 'virtio_serial_p= ci0.0', 'nr': 1}, 'id': 'qLzcCkob'} {'execute': 'device_add', 'arguments': {'id': 'port2', 'driver': 'virts= erialport', 'name': 'port2', 'chardev': 'channel2', 'bus': 'virtio_serial_p= ci0.0', 'nr': 2}, 'id': 'qLzcCkob'} The leak stack: Direct leak of 40 byte(s) in 1 object(s) allocated from: #0 0x7f04a8008ae8 in __interceptor_malloc (/lib64/libasan.so.5+0xefae8) #1 0x7f04a73cf1d5 in g_malloc (/lib64/libglib-2.0.so.0+0x531d5) #2 0x56273eaee484 in aio_bh_new /mnt/sdb/backup/qemu/util/async.c:125 #3 0x56273eafe9a8 in qemu_bh_new /mnt/sdb/backup/qemu/util/main-loop.c:= 532 #4 0x56273d52e62e in virtser_port_device_realize /mnt/sdb/backup/qemu/h= w/char/virtio-serial-bus.c:946 #5 0x56273dcc5040 in device_set_realized /mnt/sdb/backup/qemu/hw/core/q= dev.c:891 #6 0x56273e5ebbce in property_set_bool /mnt/sdb/backup/qemu/qom/object.= c:2238 #7 0x56273e5e5a9c in object_property_set /mnt/sdb/backup/qemu/qom/objec= t.c:1324 #8 0x56273e5ef5f8 in object_property_set_qobject /mnt/sdb/backup/qemu/q= om/qom-qobject.c:26 #9 0x56273e5e5e6a in object_property_set_bool /mnt/sdb/backup/qemu/qom/= object.c:1390 #10 0x56273daa40de in qdev_device_add /mnt/sdb/backup/qemu/qdev-monitor= .c:680 #11 0x56273daa53e9 in qmp_device_add /mnt/sdb/backup/qemu/qdev-monitor.= c:805 Fixes: 199646d81522509ac2dba6d28c31e8c7d807bc93 Reported-by: Euler Robot Signed-off-by: Pan Nengyuan Reviewed-by: Markus Armbruster Reviewed-by: Amit Shah Reviewed-by: Laurent Vivier --- v1->v2: - simply create port->bh last in virtser_port_device_realize() to fix memle= aks.(Suggested by Markus Armbruster) v3->v2: - tidy up commit message --- hw/char/virtio-serial-bus.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index 941ed5aca9..99a65bab7f 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -943,7 +943,6 @@ static void virtser_port_device_realize(DeviceState *de= v, Error **errp) Error *err =3D NULL; =20 port->vser =3D bus->vser; - port->bh =3D qemu_bh_new(flush_queued_data_bh, port); =20 assert(vsc->have_data); =20 @@ -992,6 +991,7 @@ static void virtser_port_device_realize(DeviceState *de= v, Error **errp) return; } =20 + port->bh =3D qemu_bh_new(flush_queued_data_bh, port); port->elem =3D NULL; } =20 --=20 2.18.2