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Commit bd97120f authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by David S. Miller
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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
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+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;