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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2020-12-02 07:44:43 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-12-02 10:36:40 +0100 |
| commit | 2c602741b51daa12f8457f222ce9ce9c4825d067 (patch) | |
| tree | e2fecdf55e0f458b58b665593b43644cb7d30bac /drivers/vhost | |
| parent | vdpa: mlx5: fix vdpa/vhost dependencies (diff) | |
| download | linux-2c602741b51daa12f8457f222ce9ce9c4825d067.tar.xz linux-2c602741b51daa12f8457f222ce9ce9c4825d067.zip | |
vhost_vdpa: return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining to be
copied but this should return -EFAULT to the user.
Fixes: 1b48dc03e575 ("vhost: vdpa: report iova range")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8c32z5EtDsMyyIL@mwanda
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vdpa.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index f2db99031e2f..29ed4173f04e 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -348,7 +348,9 @@ static long vhost_vdpa_get_iova_range(struct vhost_vdpa *v, u32 __user *argp) .last = v->range.last, }; - return copy_to_user(argp, &range, sizeof(range)); + if (copy_to_user(argp, &range, sizeof(range))) + return -EFAULT; + return 0; } static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, |