Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit bd97120f authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by David S. Miller
Browse files

vhost: fix length for cross region descriptor 



If a single descriptor crosses a region, the
second chunk length should be decremented
by size translated so far, instead it includes
the full descriptor length.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c3b2c258

drivers/vhost/vhost.c

+1 −1
Original line number Diff line number Diff line
@@ -1076,7 +1076,7 @@ static int translate_desc(struct vhost_dev *dev, u64 addr, u32 len, 
		}

		_iov = iov + ret;

		size = reg->memory_size - addr + reg->guest_phys_addr;

		_iov->iov_len = min((u64)len, size);

		_iov->iov_len = min((u64)len - s, size);

		_iov->iov_base = (void __user *)(unsigned long)

			(reg->userspace_addr + addr - reg->guest_phys_addr);

		s += size;