NFS - fix potential NULL pointer dereference v2

There is possible NULL pointer dereference if kstr[n]dup failed.
So fix them for safety.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
1 file changed