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

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 <>
Acked-by: default avatarJason Wang <>
Signed-off-by: default avatarDavid S. Miller <>
parent c3b2c258
......@@ -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;
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