int len, size = sizeof(struct sg_iovec) * iov_count;
struct iovec *iov;
- iov = kmalloc(size, GFP_ATOMIC);
- if (!iov)
- return -ENOMEM;
-
- if (copy_from_user(iov, hp->dxferp, size)) {
- kfree(iov);
- return -EFAULT;
- }
+ iov = memdup_user(hp->dxferp, size);
+ if (IS_ERR(iov))
+ return PTR_ERR(iov);
len = iov_length(iov, iov_count);
if (hp->dxfer_len < len) {