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system-config: making it more compatible with BSD systems.

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The following knobs are Linux specifics but have few counterparts
in those systems.
This commit is contained in:
David Carlier 2019-08-18 09:40:33 +01:00
parent 2053731ebc
commit dd734a01dc
1 changed files with 16 additions and 0 deletions
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16
afl-system-config
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@ -1,9 +1,11 @@
#!/bin/sh
PLATFORM=`uname -s`
echo This reconfigures the system to have a better fuzzing performance
if [ '!' "$EUID" = 0 ] && [ '!' `id -u` = 0 ] ; then
echo Error you need to be root to run this
exit 1
fi
if [ "$PLATFORM" = "Linux" ] ; then
sysctl -w kernel.core_pattern=core
sysctl -w kernel.randomize_va_space=0
sysctl -w kernel.sched_child_runs_first=1
@ -19,5 +21,19 @@ test -e /sys/devices/system/cpu/cpufreq/boost && echo 1 > /sys/devices/system/cp
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"'
fi
if [ "$PLATFORM" = "FreeBSD" ] ; then
sysctl kern.elf32.aslr.enable=0
sysctl kern.elf64.aslr.enable=0
echo
echo It is recommended to boot the kernel with lots of security off - if you are running a machine that is in a secured network - so set this:
echo 'sysctl hw.ibrs_disable=1'
echo
echo 'Setting kern.pmap.pg_ps_enabled=0 into /boot/loader.conf might be helpful too.'
fi
if [ "$PLATFORM" = "OpenBSD" ] ; then
echo
echo 'System security features cannot be disabled on OpenBSD.'
fi
echo
echo Also use AFL_TMPDIR to use a tmpfs for the input file