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Re: [PATCH] virtio-serial-bus: fix memory leak while attach virtio-seria
From: |
Laurent Vivier |
Subject: |
Re: [PATCH] virtio-serial-bus: fix memory leak while attach virtio-serial-bus |
Date: |
Mon, 2 Dec 2019 14:58:52 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 |
On 02/12/2019 12:15, address@hidden wrote:
> From: PanNengyuan <address@hidden>
>
> ivqs/ovqs/c_ivq/c_ovq is forgot to cleanup in
> virtio_serial_device_unrealize, the memory leak stack is as bellow:
>
> Direct leak of 1290240 byte(s) in 180 object(s) allocated from:
> #0 0x7fc9bfc27560 in calloc (/usr/lib64/libasan.so.3+0xc7560)
> #1 0x7fc9bed6f015 in g_malloc0 (/usr/lib64/libglib-2.0.so.0+0x50015)
> #2 0x5650e02b83e7 in virtio_add_queue
> /mnt/sdb/qemu-4.2.0-rc0/hw/virtio/virtio.c:2327
> #3 0x5650e02847b5 in virtio_serial_device_realize
> /mnt/sdb/qemu-4.2.0-rc0/hw/char/virtio-serial-bus.c:1089
> #4 0x5650e02b56a7 in virtio_device_realize
> /mnt/sdb/qemu-4.2.0-rc0/hw/virtio/virtio.c:3504
> #5 0x5650e03bf031 in device_set_realized
> /mnt/sdb/qemu-4.2.0-rc0/hw/core/qdev.c:876
> #6 0x5650e0531efd in property_set_bool
> /mnt/sdb/qemu-4.2.0-rc0/qom/object.c:2080
> #7 0x5650e053650e in object_property_set_qobject
> /mnt/sdb/qemu-4.2.0-rc0/qom/qom-qobject.c:26
> #8 0x5650e0533e14 in object_property_set_bool
> /mnt/sdb/qemu-4.2.0-rc0/qom/object.c:1338
> #9 0x5650e04c0e37 in virtio_pci_realize
> /mnt/sdb/qemu-4.2.0-rc0/hw/virtio/virtio-pci.c:1801
>
> Reported-by: Euler Robot <address@hidden>
> Signed-off-by: PanNengyuan <address@hidden>
> ---
> hw/char/virtio-serial-bus.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
> index 3325904..da9019a 100644
> --- a/hw/char/virtio-serial-bus.c
> +++ b/hw/char/virtio-serial-bus.c
> @@ -1126,9 +1126,15 @@ static void virtio_serial_device_unrealize(DeviceState
> *dev, Error **errp)
> {
> VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> VirtIOSerial *vser = VIRTIO_SERIAL(dev);
> + int i;
>
> QLIST_REMOVE(vser, next);
>
> + for (i = 0; i <= vser->bus.max_nr_ports; i++) {
> + virtio_del_queue(vdev, 2 * i);
> + virtio_del_queue(vdev, 2 * i + 1);
> + }
> +
According to virtio_serial_device_realize() and the number of
virtio_add_queue(), I think you have more queues to delete:
4 + 2 * vser->bus.max_nr_ports
(for vser->ivqs[0], vser->ovqs[0], vser->c_ivq, vser->c_ovq,
vser->ivqs[i], vser->ovqs[i]).
Thanks,
Laurent