Messages in this thread | | | Subject | Re: [RFC PATCH 02/24] vhost-vdpa: fix vqs leak in vhost_vdpa_open() | From | Jason Wang <> | Date | Fri, 25 Sep 2020 19:41:37 +0800 |
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On 2020/9/24 下午3:48, Eli Cohen wrote: > On Thu, Sep 24, 2020 at 11:21:03AM +0800, Jason Wang wrote: >> We need to free vqs during the err path after it has been allocated >> since vhost won't do that for us. >> >> Signed-off-by: Jason Wang <jasowang@redhat.com> >> --- >> drivers/vhost/vdpa.c | 11 ++++++++--- >> 1 file changed, 8 insertions(+), 3 deletions(-) >> >> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c >> index 796fe979f997..9c641274b9f3 100644 >> --- a/drivers/vhost/vdpa.c >> +++ b/drivers/vhost/vdpa.c >> @@ -764,6 +764,12 @@ static void vhost_vdpa_free_domain(struct vhost_vdpa *v) >> v->domain = NULL; >> } >> >> +static void vhost_vdpa_cleanup(struct vhost_vdpa *v) >> +{ >> + vhost_dev_cleanup(&v->vdev); >> + kfree(v->vdev.vqs); >> +} >> + > Wouldn't it be cleaner to call kfree(vqs) explicilty inside > vhost_vdpa_open() in case of failure and keep the symetry of > vhost_dev_init()/vhost_dev_cleanup()?
That's also fine.
See https://www.mail-archive.com/virtualization@lists.linux-foundation.org/msg42558.html
I will use that for the next version.
Thanks.
> >> static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> { >> struct vhost_vdpa *v; >> @@ -809,7 +815,7 @@ static int vhost_vdpa_open(struct inode *inode, struct file *filep) >> return 0; >> >> err_init_iotlb: >> - vhost_dev_cleanup(&v->vdev); >> + vhost_vdpa_cleanup(v); >> err: >> atomic_dec(&v->opened); >> return r; >> @@ -840,8 +846,7 @@ static int vhost_vdpa_release(struct inode *inode, struct file *filep) >> vhost_vdpa_free_domain(v); >> vhost_vdpa_config_put(v); >> vhost_vdpa_clean_irq(v); >> - vhost_dev_cleanup(&v->vdev); >> - kfree(v->vdev.vqs); >> + vhost_vdpa_cleanup(v); >> mutex_unlock(&d->mutex); >> >> atomic_dec(&v->opened); >> -- >> 2.20.1 >>
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