[smb3] unreachable code and memory leaks

[Gustavo A. R. Silva]

Hi Steve,

While doing some static analysis I came across the following piece of code at 
fs/cifs/smb2pdu.c:2017:

2017                if (n_iov > 2) {
2018                        struct create_context *ccontext =
2019                            (struct create_context *)iov[n_iov-1].iov_base;
2020                        ccontext->Next =
2021                                cpu_to_le32(iov[n_iov-1].iov_len);
2022                }

The code above is unreachable because n_iov is initialized to 2 and, its value 
is never updated.
I'm not sure how to fix this.

Also, it seems there are multiple places in which memory allocated for *path* 
is leaking:

1946        else
1947                return -EIO;

1951        if (rc)
1952                return rc;

1987                if (rc) {
1988                        cifs_small_buf_release(req);
1989                        return rc;
1990                }

and more...

Thanks
--
Gustavo