diff options
| -rw-r--r-- | drivers/net/tun_vnet.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/tun_vnet.h b/drivers/net/tun_vnet.h index fd7411c4447f..58b9ac7a5fc4 100644 --- a/drivers/net/tun_vnet.h +++ b/drivers/net/tun_vnet.h @@ -143,7 +143,8 @@ static inline int tun_vnet_hdr_put(int sz, struct iov_iter *iter, if (unlikely(copy_to_iter(hdr, sizeof(*hdr), iter) != sizeof(*hdr))) return -EFAULT; - iov_iter_advance(iter, sz - sizeof(*hdr)); + if (iov_iter_zero(sz - sizeof(*hdr), iter) != sz - sizeof(*hdr)) + return -EFAULT; return 0; } |