Firmware AFL++ fuzzing fails

Question

I want to do Iot firmware fuzzing by AFL++ on a Linux system https://blog.attify.com/fuzzing-iot-devices-part-1/

I have done the setup according to that link. when i run

sudo QEMU_LD_PREFIX=./squashfs-root/ ../AFLplusplus/afl-fuzz -Q -i input-xml/ -o output-xml/ -- ./squashfs-root/usr/sbin/xmlparser1 -f @@

it gives an error message asking to modify /proc/sys/kernel/core_pattern: I tried the solution given in here AFL fuzzing without root - avoid modifying /proc/sys/kernel/core_pattern to add AFL_I_DONT_CARE_ABOUT_MISSING_CRASHES in /proc/sys/kernel/core_pattern but it doesn't work maybe I did it wrong.

output:

Answer 1

Do following:

1. sudo -i
2. echo core>/proc/sys/kernel/core_pattern

It should work.