diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2012-11-26 05:57:27 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-03-06 03:24:25 +0000 |
| commit | e188567f35fe514253b2e46a31cf03272ab8c030 (patch) | |
| tree | bb0f8043c9feb0b77cb5eb04721a7a8b0725f78f | |
| parent | 04ea2389e48049a79da78e517ebb411d2fad7bf2 (diff) | |
vhost: fix length for cross region descriptor
commit bd97120fc3d1a11f3124c7c9ba1d91f51829eb85 upstream.
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: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -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 ae66278e4dc..be32b1ba8fa 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1073,7 +1073,7 @@ 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; |