crypto: lzo - Fix compression buffer overrun

In the Linux kernel, the following vulnerability has been resolved:

crypto: lzo - Fix compression buffer overrun

Unlike the decompression code, the compression code in LZO never

checked for output overruns. It instead assumes that the caller

always provides enough buffer space, disregarding the buffer length

provided by the caller.

Add a safe compression interface that checks for the end of buffer

before each write. Use the safe interface in crypto/lzo.