diff options
| author | Jian Wang <wangjian161@huawei.com> | 2018-12-22 18:27:28 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-01-14 19:31:04 -0500 |
| commit | a5390d936714482ac5996e1635a6ffd9c3c133df (patch) | |
| tree | 7787614c302406064a9c79e20095bdaaf51e1ff3 /hw/block | |
| parent | 5a0e75f0a9ad063ebaa7eb19b82104f00acb80a0 (diff) | |
| download | qemu-a5390d936714482ac5996e1635a6ffd9c3c133df.zip qemu-a5390d936714482ac5996e1635a6ffd9c3c133df.tar.gz qemu-a5390d936714482ac5996e1635a6ffd9c3c133df.tar.bz2 | |
qemu: avoid memory leak while remove disk
Memset vhost_dev to zero in the vhost_dev_cleanup function.
This causes dev.vqs to be NULL, so that
vqs does not free up space when calling the g_free function.
This will result in a memory leak. But you can't release vqs
directly in the vhost_dev_cleanup function, because vhost_net
will also call this function, and vhost_net's vqs is assigned by array.
In order to solve this problem, we first save the pointer of vqs,
and release the space of vqs after vhost_dev_cleanup is called.
Signed-off-by: Jian Wang <wangjian161@huawei.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/vhost-user-blk.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c index 1451940..c3af28f 100644 --- a/hw/block/vhost-user-blk.c +++ b/hw/block/vhost-user-blk.c @@ -250,6 +250,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) VirtIODevice *vdev = VIRTIO_DEVICE(dev); VHostUserBlk *s = VHOST_USER_BLK(vdev); VhostUserState *user; + struct vhost_virtqueue *vqs = NULL; int i, ret; if (!s->chardev.chr) { @@ -288,6 +289,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) s->dev.vqs = g_new(struct vhost_virtqueue, s->dev.nvqs); s->dev.vq_index = 0; s->dev.backend_features = 0; + vqs = s->dev.vqs; vhost_dev_set_config_notifier(&s->dev, &blk_ops); @@ -314,7 +316,7 @@ static void vhost_user_blk_device_realize(DeviceState *dev, Error **errp) vhost_err: vhost_dev_cleanup(&s->dev); virtio_err: - g_free(s->dev.vqs); + g_free(vqs); virtio_cleanup(vdev); vhost_user_cleanup(user); @@ -326,10 +328,11 @@ static void vhost_user_blk_device_unrealize(DeviceState *dev, Error **errp) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); VHostUserBlk *s = VHOST_USER_BLK(dev); + struct vhost_virtqueue *vqs = s->dev.vqs; vhost_user_blk_set_status(vdev, 0); vhost_dev_cleanup(&s->dev); - g_free(s->dev.vqs); + g_free(vqs); virtio_cleanup(vdev); if (s->vhost_user) { |