Invalid argument error while creating hard links on bash on ubuntu

[Hakan Kurtoğlu]

Hello everyone,

As part of a project, I'm trying fuzz a simple program getting inputs from stdin. I'm constantly getting this error:

afl-fuzz 1.96b by <lcamtuf@google.com>
[+] You have 4 CPU cores and 1 runnable tasks (utilization: 25%).
[+] Try parallel jobs - see /usr/share/doc/afl/parallel_fuzzing.txt.
[*] Setting up output directories...
[+] Output directory exists but deemed OK to reuse.
[*] Deleting old session data...
[+] Output dir cleanup successful.
[*] Scanning 'in/'...
[+] No auto-generated dictionary tokens to reuse.
[*] Creating hard links for all input files...

[-]  SYSTEM ERROR : Unable to create 'out/queue/id:000000,orig:in'
    Stop location : link_or_copy(), afl-fuzz.c:2733
       OS message : Invalid argument

I couldn't find any solution on what is causing the error. I'm trying to run it on Linux subsystem on my Windows 10.

I would appreciate any ideas.

Hakan.

[Michal Zalewski]

> I couldn't find any solution on what is causing the error. I'm trying to run
> it on Linux subsystem on my Windows 10.

This environment is not supported and will probably not work; but you
might want to try editing config.h and uncommenting this line:

// #define SIMPLE_FILES

/mz

[Jakub Wilk]

* Hakan Kurtoğlu <havo...@gmail.com>, 2017-12-22, 11:57:

>> [-] SYSTEM ERROR : Unable to create 'out/queue/id:000000,orig:in'
>> Stop location : link_or_copy(), afl-fuzz.c:2733
>> OS message : Invalid argument

This is most likely because Windows doesn't like colons in filenames.
https://github.com/Microsoft/WSL/issues/1514 suggests that putting the
output directory somewhere in /home may help.

--
Jakub Wilk

[Hakan Kurtoğlu]

I've changed my output directory to "/home/out" and now works like a charm. Thanks a lot!