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HexHive / T-Fuzz

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AFL Error: Suboptimal CPU scaling governor #8

Closed RosenZhu closed 5 years ago

RosenZhu commented 5 years ago

I tried T-fuzz, but I got the following error. I think this may be related to the change of angr. Because angr is changed to support python3 and its 'tracer' is merged into angr. So maybe you can push the whole codes including angr and shellphish fuzzer. my system is ubuntu 16.04. ./TFuzz --program target_programs/base64 --work_dir workdir_base64 --target_opts "-d @@" `WARNING | 2018-10-28 23:45:10,451 | angr.analyses.disassembly_utils | Your verison of capstone does not support MIPS instruction groups. ERROR | 2018-10-28 23:45:10,721 | fuzzer.fuzzer | AFL Error: Pipe at the beginning of core_pattern execute 'echo core | sudo tee /proc/sys/kernel/core_pattern' AFL Error: Suboptimal CPU scaling governor execute 'cd /sys/devices/system/cpu; echo performance | sudo tee cpu*/cpufreq/scaling_governor' AFL Warning: We probably want the fork() children to run first execute 'echo 1 | sudo tee /proc/sys/kernel/sched_child_runs_first'

Traceback (most recent call last): File "./TFuzz", line 64, in main() File "./TFuzz", line 15, in main __angr_Fuzzer._perform_env_checks() File "/home/rosen/anaconda3/envs/T-Fuzz/lib/python2.7/site-packages/fuzzer/fuzzer.py", line 599, in _perform_env_checks raise InstallError(err) fuzzer.fuzzer.InstallError: AFL Error: Pipe at the beginning of core_pattern execute 'echo core | sudo tee /proc/sys/kernel/core_pattern' AFL Error: Suboptimal CPU scaling governor execute 'cd /sys/devices/system/cpu; echo performance | sudo tee cpu*/cpufreq/scaling_governor' AFL Warning: We probably want the fork() children to run first execute 'echo 1 | sudo tee /proc/sys/kernel/sched_child_runs_first'`

Thanks for your time.

vwvw commented 5 years ago

Hmm, T-Fuzz doesn't use the most recent version of angr and it should not contain python3 code. It looks to me like you didn't run the kernel_config.sh script. Can you retest after running the script?

RosenZhu commented 5 years ago

Hmm, T-Fuzz doesn't use the most recent version of angr and it should not contain python3 code. It looks to me like you didn't run the kernel_config.sh script. Can you retest after running the script?

Thanks!!! I'll try that.

RosenZhu commented 5 years ago

I tried the kernel_config.sh, but it still not work.

gannimo commented 5 years ago

You need to run it as root. Try to get AFL by its own running first. If AFL runs on your setup then T-Fuzz should as well. Reopen the issue if you're still running into problems :)