From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38297) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cZMEb-0003qF-HD for qemu-devel@nongnu.org; Thu, 02 Feb 2017 13:35:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cZMEa-0004gX-Kz for qemu-devel@nongnu.org; Thu, 02 Feb 2017 13:35:53 -0500 Received: from mail.kernel.org ([198.145.29.136]:45178) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cZMEa-0004g6-EY for qemu-devel@nongnu.org; Thu, 02 Feb 2017 13:35:52 -0500 From: Stefano Stabellini Date: Thu, 2 Feb 2017 10:35:41 -0800 Message-Id: <1486060541-29146-5-git-send-email-sstabellini@kernel.org> In-Reply-To: <1486060541-29146-1-git-send-email-sstabellini@kernel.org> References: <1486060541-29146-1-git-send-email-sstabellini@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL 5/5] xen: use qdev_unplug() instead of g_free() in xen_pv_find_xendev() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: stefanha@gmail.com Cc: sstabellini@kernel.org, stefanha@redhat.com, peter.maydell@linaro.org, anthony.perard@citrix.com, xen-devel@lists.xenproject.org, qemu-devel@nongnu.org, Juergen Gross From: Juergen Gross The error exits of xen_pv_find_xendev() free the new xen-device via g_free() which is wrong. As the xen-device has been initialized as qdev it must be removed via qdev_unplug(). This bug has been introduced with commit 3a6c9172ac5951e6dac2b3f6 ("xen: create qdev for each backend device"). Reported-by: Roger Pau Monn=C3=A9 Tested-by: Roger Pau Monn=C3=A9 Signed-off-by: Juergen Gross Reviewed-by: Stefano Stabellini --- hw/xen/xen_backend.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c index d119004..6c21c37 100644 --- a/hw/xen/xen_backend.c +++ b/hw/xen/xen_backend.c @@ -124,10 +124,11 @@ static struct XenDevice *xen_be_get_xendev(const ch= ar *type, int dom, int dev, /* init new xendev */ xendev =3D g_malloc0(ops->size); object_initialize(&xendev->qdev, ops->size, TYPE_XENBACKEND); - qdev_set_parent_bus(&xendev->qdev, xen_sysbus); - qdev_set_id(&xendev->qdev, g_strdup_printf("xen-%s-%d", type, dev)); - qdev_init_nofail(&xendev->qdev); - object_unref(OBJECT(&xendev->qdev)); + OBJECT(xendev)->free =3D g_free; + qdev_set_parent_bus(DEVICE(xendev), xen_sysbus); + qdev_set_id(DEVICE(xendev), g_strdup_printf("xen-%s-%d", type, dev))= ; + qdev_init_nofail(DEVICE(xendev)); + object_unref(OBJECT(xendev)); =20 xendev->type =3D type; xendev->dom =3D dom; @@ -145,7 +146,7 @@ static struct XenDevice *xen_be_get_xendev(const char= *type, int dom, int dev, xendev->evtchndev =3D xenevtchn_open(NULL, 0); if (xendev->evtchndev =3D=3D NULL) { xen_pv_printf(NULL, 0, "can't open evtchn device\n"); - g_free(xendev); + qdev_unplug(DEVICE(xendev), NULL); return NULL; } fcntl(xenevtchn_fd(xendev->evtchndev), F_SETFD, FD_CLOEXEC); @@ -155,7 +156,7 @@ static struct XenDevice *xen_be_get_xendev(const char= *type, int dom, int dev, if (xendev->gnttabdev =3D=3D NULL) { xen_pv_printf(NULL, 0, "can't open gnttab device\n"); xenevtchn_close(xendev->evtchndev); - g_free(xendev); + qdev_unplug(DEVICE(xendev), NULL); return NULL; } } else { --=20 1.9.1