| #!/bin/sh |
| echo This reconfigures the system to have a better fuzzing performance |
| if [ '!' "$EUID" = 0 ] && [ '!' `id -u` = 0 ] ; then |
| echo Error you need to be root to run this |
| exit 1 |
| fi |
| sysctl -w kernel.core_pattern=core |
| sysctl -w kernel.randomize_va_space=0 |
| sysctl -w kernel.sched_child_runs_first=1 |
| sysctl -w kernel.sched_autogroup_enabled=1 |
| sysctl -w kernel.sched_migration_cost_ns=50000000 |
| sysctl -w kernel.sched_latency_ns=250000000 |
| echo never > /sys/kernel/mm/transparent_hugepage/enabled |
| test -e /sys/devices/system/cpu/cpufreq/scaling_governor && echo performance | tee /sys/devices/system/cpu/cpufreq/scaling_governor |
| test -e /sys/devices/system/cpu/cpufreq/policy0/scaling_governor && echo performance | tee /sys/devices/system/cpu/cpufreq/policy*/scaling_governor |
| test -e /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor && echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor |
| test -e /sys/devices/system/cpu/intel_pstate/no_turbo && echo 0 > /sys/devices/system/cpu/intel_pstate/no_turbo |
| test -e /sys/devices/system/cpu/cpufreq/boost && echo 1 > /sys/devices/system/cpu/cpufreq/boost |
| echo |
| echo It is recommended to boot the kernel with lots of security off - if you are running a machine that is in a secured network - so set this: |
| echo '/etc/default/grub:GRUB_CMDLINE_LINUX_DEFAULT="ibpb=off ibrs=off kpti=off l1tf=off mds=off mitigations=off no_stf_barrier noibpb noibrs nopcid nopti nospec_store_bypass_disable nospectre_v1 nospectre_v2 pcid=off pti=off spec_store_bypass_disable=off spectre_v2=off stf_barrier=off"' |
| echo |
| echo Also use AFL_TMPDIR to use a tmpfs for the input file |
