Qemu USB issue

[kbh1860]

Hello! I'm interesting to your project.

It can be add USB in the target vm??

I'm add this option in kafl_fuzzer/common/config/default_settings.yml

qemu_base: -enable-kvm -machine kAFL64-v1 -cpu kAFL64-Hypervisor-v1,+vmx -no-reboot -display none -net none -device nec-usb-xhci -device usb-host,hostbus=1,hostport=5

like this, but the error has shown "qemu-system-x86_64: -device usb-host,hostbus=1,hostport=5: 'usb-host' is not a valid device model name"

Qemu-nyx doesn't have usb add features?? Or is there another way?

[Wenzel]

Hi @kbh1860 thank you for your interest in kAFL !

It seems that libusb is disabled by default in QEMU, since our configure line doesn't enable or disable that feature explicitely: https://github.com/IntelLabs/kafl.qemu/blob/kafl_stable/compile_qemu_nyx.sh#L78

you will need to add --enable-libusb to that line, and and instruct kAFL deployment to simply run the build task:

make deploy -- --tags build

[Wenzel]

Hi @kbh1860 did you solve your issue ? Can we close it ?