[BUG] segfault at `find_finfo(3)`

segfault is thrown when trying to compile the linux kernel at strcmp(hash, finfo[i].hash) of find_finfo(3). Turns out finfo[i].hash is NULL while hash isn't.

Consider the following scenario:

open f1 = "/some/file" for writing open f2 = "/some/file" for reading close f1(write) close f2(read)

the above sequence will throw a segfault. That's because f1->hash is computed at close(2). Yet f2 open will search the finfo array and stumble upon the scenario mentioned above.

This(bug $1) was definitely a bug and I've patched it, yet the problem mentioned still remains and thus i believe there is another bug(bug $2).

I will submit my solution of bug $1 soon so we can work from there.