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Commit 7ced6c98 authored by Eric Auger's avatar Eric Auger Committed by David S. Miller
Browse files

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: f8894913 ("vhost: introduce O(1) vq metadata cache")
Signed-off-by: default avatarEric Auger <eric.auger@redhat.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 98239c90

drivers/vhost/vhost.c

+1 −1
Original line number Diff line number Diff line
@@ -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);