Fuzzer Not Displaying: Interrupted

[jahidhasanlinix]

So I was running fuzzer, but I am not getting the GUI interface of it, I did steps 1-4 correctly without an error. @squizz617 Thanks.

[squizz617]

Could you post the output of the following?

$ cd src/emulator
$ ./emulator.py -i ../samples/oracle/btrfs-10.image -t btrfs -v -p $(find /tmp/mosbench/tmpfs-separate/10/log/ -name "*prog" | head -n 1)

[jahidhasanlinix]

/emulator.py -i ../samples/oracle/btrfs-10.image -t btrfs -v -p $(find /tmp/mosbench/tmpfs-separate/10/log/ -name "*prog" | head -n 1)

Thats what I am getting now:

~/hydra/src/emulator$ ./emulator.py -i ../samples/oracle/btrfs-10.image -t btrfs -v -p $(find /tmp/mosbench/tmpfs-separate/10/log/ -name "*prog" | head -n 1)
find: ‘/tmp/mosbench/tmpfs-separate/10/log/’: No such file or directory
-bash: ./emulator.py: /usr/bin/python2: bad interpreter: No such file or directory

I changed /usr/bin/python2 to `/usr/bin/python3'
Then got this error:

~/hydra/src/emulator$ ./emulator.py -i ../samples/oracle/btrfs-10.image -t btrfs -v -p $(find /tmp/mosbench/tmpfs-separate/10/log/ -name "*prog" | head -n 1)
find: ‘/tmp/mosbench/tmpfs-separate/10/log/’: No such file or directory
  File "./emulator.py", line 107
    print "ARGS:", args
          ^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("ARGS:", args)?

[squizz617]

Ah, seems like Ubuntu 20.04 does not ship with python 2 installed anymore.
Please install python2:

$ sudo apt update
$ sudo apt install python2

(ref: https://linuxconfig.org/install-python-2-on-ubuntu-20-04-focal-fossa-linux)

[jahidhasanlinix]

~run.py
[-] PROGRAM ABORT : Pipe at the beginning of 'core_pattern'
         Location : check_crash_handling(), afl-fuzz.c:7540

[squizz617]

Have you re-booted after you opened the issue? If so, please run sudo ./prepare_fuzzing (step 4) again.

[squizz617]

it stopped within few seconds

Hydra was originally implemented for Ubuntu 18.04, and it seems that there is a compatibility issue on Ubuntu 20.04. Someone recently reported the issue, and we've been working on a fix. I will let you know as soon as this is resolved.

[squizz617]

Based on line#72 fs/{2}/{2}_wrapper.so -e samples/oracle/{2}-.image -y seed -i {3} -o {4} -u {5} -- lkl/tools/lkl/{2}-combined-consistency -t {2} -i samples/oracle/{2}-.image

• Whats that {2} refering here and wrapper.so file
• seed -i {3} -o {4} -u {5}: this instruction for what reason
• samples/oracle/{2}-.image- if I wanna use some different .image file here, If I wanna use other .image file does this syntax is the correct format or I need to change {2} into btrfs or ext4- eg:samples/oracle/{2}-'+str(i)+'.image

{i} is replaced with the i-th argument of format() following the string.
Please refer to python2's format string documentation (https://docs.python.org/2/library/string.html#format-examples) for further information.

[jahidhasanlinix]

I guess I got another question before you close it, based on line #72, what would {0}, {1}, {2}, {3}, {4}, {5} and {6} be in that line? just make myself little clear about those argument.

[squizz617]

As I mentioned above, {i} is replaced with the i-th argument of format() following the string. So, 0: instance_name, 1: shm_name, 2: args.fstype, and so on.

Closing!