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| author | Eric Auger <eric.auger@redhat.com> | 2018-04-11 15:30:38 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-04-11 10:52:34 -0400 |
| commit | 7ced6c98c7ab7a1f6743931e28671b833af79b1e (patch) | |
| tree | 83c1da2c76b6b049915063144677b9b77a9ba122 /drivers/vhost/vhost.c | |
| parent | 98239c9096ed1dad97f01c66aa6d8b6e9be9029a (diff) | |
| download | linux-7ced6c98c7ab7a1f6743931e28671b833af79b1e.tar.gz linux-7ced6c98c7ab7a1f6743931e28671b833af79b1e.tar.xz | |
vhost: Fix vhost_copy_to_user()
vhost_copy_to_user is used to copy vring used elements to userspace.
We should use VHOST_ADDR_USED instead of VHOST_ADDR_DESC.
Fixes: f88949138058 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/vhost/vhost.c')
| -rw-r--r-- | drivers/vhost/vhost.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index bec722e41f58..f44aead98d60 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -744,7 +744,7 @@ static int vhost_copy_to_user(struct vhost_virtqueue *vq, void __user *to, struct iov_iter t; void __user *uaddr = vhost_vq_meta_fetch(vq, (u64)(uintptr_t)to, size, - VHOST_ADDR_DESC); + VHOST_ADDR_USED); if (uaddr) return __copy_to_user(uaddr, from, size); |