kmalloc can fail and we should check for NULL before using the pointer
returned by kmalloc.
Signed-off-by: NSudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: NDave Jiang <dave.jiang@intel.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>