diff options
| author | Eli Cohen <elic@nvidia.com> | 2022-01-11 19:33:58 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-01-15 00:50:54 +0100 |
| commit | 680ab9d69a04cfd9f3f5fedaacbc1974b2959121 (patch) | |
| tree | 04a34fb7783e0e528b3742b2dafe811e99f186a9 /drivers | |
| parent | vdpa: Avoid taking cf_mutex lock on get status (diff) | |
| download | linux-680ab9d69a04cfd9f3f5fedaacbc1974b2959121.tar.xz linux-680ab9d69a04cfd9f3f5fedaacbc1974b2959121.zip | |
vdpa: Protect vdpa reset with cf_mutex
Call reset using the wrapper function vdpa_reset() to make sure the
operation is serialized with cf_mutex.
This comes to protect from the following possible scenario:
vhost_vdpa_set_status() could call the reset op. Since the call is not
protected by cf_mutex, a netlink thread calling vdpa_dev_config_fill
could get passed the VIRTIO_CONFIG_S_FEATURES_OK check in
vdpa_dev_config_fill() and end up reporting wrong features.
Fixes: 5f6e85953d8f ("vdpa: Read device configuration only if FEATURES_OK")
Signed-off-by: Eli Cohen <elic@nvidia.com>
Link: https://lore.kernel.org/r/20220111183400.38418-3-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Si-Wei Liu<si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vhost/vdpa.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 0ed6cbadb52d..851539807bc9 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -178,7 +178,7 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp) vhost_vdpa_unsetup_vq_irq(v, i); if (status == 0) { - ret = ops->reset(vdpa); + ret = vdpa_reset(vdpa); if (ret) return ret; } else |